JPS588260Y2 - Fire extinguishing equipment - Google Patents

Description

[Detailed explanation of the invention] Fire extinguishing equipment generally requires electrical wiring,
Such electrical wiring itself often causes a fire, and in the event of a power outage due to a fire, this equipment may not be able to operate.

In addition, the number of fire prevention objects with multiple uses is increasing, and it is recognized that there is a need to have two or more types of fire extinguishing equipment from the viewpoint of the appropriateness of the extinguishing ability of the corresponding extinguishing agent and the protection of property and human life. However, in such cases, it has conventionally been necessary to install two or more piping systems in duplicate.

This invention was completed as a result of research and development with the aim of creating a fire extinguishing system that does not require electrical wiring, is inexpensive to construct, and is easy to operate.

Conventionally, as a single-purpose fire extinguishing system, a sprinkler system equipped with a closing head that also serves as a dry sensing system has been known from Japanese Patent Application Laid-Open No. 52-54298, etc. A method has been introduced in which the piping is separated by a valve, the tip of the piping is filled with pressure gas for fire detection, and the latter half of the main piping is filled with extinguishing agent.

In these methods, the latter half of the main piping is filled with a specific extinguishing agent, so it is not possible to selectively release two or more types of extinguishing agents, and they usually require an electrical control system. Ta.

In order to improve the shortcomings of conventional fire extinguishing equipment, this invention separates the sensing piping and the discharge piping at the tip, and uses the latter part of the main piping as a normally unpressurized empty pipe to which various extinguishing agents can be supplied. The present invention provides a new and versatile fire extinguishing equipment that can be delivered on demand.

That is, a fire detection head, a fire detection block selection valve opened by the fire detection head, a starting cylinder equipped with an automatic starting valve that is activated by a drop in gas pressure resulting from the opening of the selection valve, and This relates to fire extinguishing equipment consisting of a fire extinguishing agent filling container equipped with an automatic start valve that is activated by the pressure of the cylinder, and piping that leads this extinguishing agent to a discharge head.

Then, this fire extinguishing agent filling container is divided into two, and CO2,
N2. Separate the containers into pressurized containers filled with inert gas such as halon gas and containers containing extinguishing agents other than gas such as powder extinguishing agent, extinguishing liquid, and fire extinguishing foam, and pressurize the pressurized gas containers filled with inert gas. It may include equipment for introducing gas into a container filled with a fire extinguishing agent other than gas and ejecting it through the piping and through a discharge head.

Next, the present invention will be explained with reference to the drawings.

The fire detection head 1 is an open type sprinkler head, which is not used for the purpose of discharging extinguishing agent, but is used only for the detection function, and is installed in a place where there is a risk of fire, and is installed through high-pressure gas. , small diameter sensing piping 1
One or more can be attached to a.

The sensing piping 1a is also provided with a manual release valve 18 that manually activates the fire sensing operation in the event of an emergency.

The sensing pipe 1a is connected to an automatic fire block selection valve 2 via a pilot valve 2a.

The pilot valve 2a attached to this automatic fire block selection valve 2 has a built-in diaphragm, and the sensing piping 1a is normally
The automatic fire detection block selection valve 2 is closed in response to the high pressure gas pressure, but when the pressure in the sensing pipe 1a decreases, the diaphragm is reversed and the automatic fire detection block selection valve 2 is opened.

A fire extinguishant discharge pipe 3a having a large diameter is connected to the outlet 2b of the automatic fire detection block selection valve 2, and a plurality of fire extinguishant discharge heads 3 are attached to this fire extinguishant discharge pipe 3a.

Since the extinguishing agent discharge head is an open type, that is, a jet hole that is always open, the extinguishing agent discharge piping 3a leading from the head 3 to the outlet 2b is normally an empty pipe with no pressure, that is, at atmospheric pressure.

The inlet 2C of the automatic fire detection block selection valve is connected to the main pipe 4.

Although the above explanation was made only for the first stage on the left half of the drawing, the right half is also piped in the same way, and the branch point 4 of the main pipe 4 is
A second stage, a third stage (not shown), etc. are piped from a.

The main pipe 4 is filled with high pressure gas such as compressed air of 7 to 10 atmospheres, and this high pressure gas is supplied to the automatic fire detection block selection valve 2.
From there, it enters the sensing piping 1a through the pilot valve 2a, and reaches the sensing head 1, which is normally closed.

Each branch pipe is provided with a check valve 5 that prevents fluid from flowing back into the main pipe from the branch pipe side.
This is so that if the high pressure gas in the other branch is lost more rapidly than the other branch, the high pressure gas in the other branch will maintain its pressure.

That is, in the figure, when a fire occurs near the sensing head 1 and the sensing head 1 opens, high-pressure gas inside the sensing pipe 1a is released, but the automatic fire sensing block selection valve 2
Since the piping leading to the pilot valve 2a is extremely thin, the replenishment of high-pressure gas from the main piping 4 to the sensing piping 1a is minute, so the gas pressure in the sensing piping 1a decreases and the pilot valve 2a bursts, the automatic fire detection block selection valve 2 opens, and the high pressure gas in the main pipe 4 rushes into the large diameter extinguishant discharge pipe 3a, and is discharged from the extinguishant discharge head 3, which is always open. Therefore, the gas pressure within the main pipe 4 will drop rapidly.

In this case, if there is no check valve 5' in the other branch pipe, for example, the pressure in the piping section up to the inlet 20' of the automatic fire block selection valve in the right branch pipe is immediately reduced, and the sensing valve connected to it is immediately depressurized. The high pressure gas in the pipe 1a' gradually passes through the selection valve and is lost.

Therefore, the selection valve of the right pipe is also opened after a slight time lag, causing the inconvenience that the extinguishing agent is discharged from the extinguishing agent discharge head in an area where no fire has occurred.

In order to prevent such inconvenience from occurring, a check valve 5' is provided, and the depressurization phenomenon in the main pipe 4 is stopped at the inlet 50' of the check valve 5', and the high pressure gas in the pipe to the right is maintained. It has become so.

The main pipe 4 branches into a pressure detection pipe 7 from a branch point 4b, and upstream of the main pipe 4, fluid flows from upstream to downstream in the figure, but a check valve 5a prevents fluid from flowing in the opposite direction. is provided.

The main pipe 4C upstream of the inlet 5C of the check valve 5a is normally unpressurized, that is, an empty pipe at atmospheric pressure.

An air supply device 13 for replenishing the inside of the pipe is provided in the middle of the pressure detection pipe 7, and an automatic start valve 6 is connected to the tip thereof.

The pipe replenishment air supply device 13 maintains the gas pressure in the main pipe 4, the pressure detection pipe 7, and the sensing pipe 1a at a constant high pressure, that is, prevents the pressure from decreasing due to leakage. It is provided for the purpose of replenishing pressure so that it can be used.

This device includes a cylinder 14 or compressor 15 for supplying air into the pipe, an orifice 16 for restricting the flow rate, and a pressure control device 11.
It also includes check valves and the like, which operate as necessary to maintain the gas pressure in the main piping at 7 to 10 atmospheres.

In this way, the piping system consisting of the sensing piping 1a, the main piping 4, and the pressure sensing piping 7 is constructed such that a series of high pressure This makes up the piping system.

The automatic start valve 6 is provided with a diaphragm 6a, and its lower chamber 6b.
High pressure gas is introduced from the pressure detection pipe 7, and a spring spring 6C is provided to balance the gas pressure.

When the pressure in the lower chamber 6b is lost, the automatic start valve 6 starts,
As schematically indicated by an arrow 6d in the figure, the sealing plate of the starting cylinder 8 is broken by an action such as dropping a weight, for example.

The starting cylinder 8 is a small cylinder for air, nitrogen, carbon dioxide, etc., and is connected to the automatic starting valve 1 by a thin copper pipe 8a.
Connected to 0.

The gaseous extinguishing agent container 9 contains a large amount of carbon dioxide gas, Halon 1301. etc., and an automatic starting valve 10 is attached to each or several of them together.

As this automatic starting valve 10, a so-called Y-type valve or the like is suitably used, which is equipped with a mechanism that automatically opens upon receiving the pressure gas generated by opening the starting cylinder 8.

When the automatic start valve 10 is opened and the gaseous fire extinguishing agent container 9 is opened, the gaseous fire extinguishing agent such as carbon dioxide and halon 1301 is discharged through the pipe 9a, the regulator 11. It is led to the normally empty main pipe 4C through the three-way valve 12a, and the check valve 5a and the main pipe 4
, passes through the check valve 5, reaches the automatic fire block selection valve 2, further passes through this and enters the extinguishing agent discharge pipe 3a,
The extinguishing agent is discharged from the extinguishing agent discharge head 3.

In the event of a fire, the automatic fire block selection valve 2 is open.
Since the pressure in the main pipe 4 has decreased, there is nothing that prevents the gaseous fire extinguishing agent in the gaseous fire extinguishing agent container 9 from passing through the pipe, so that the gaseous fire extinguishing agent is discharged in a short time.

Depending on the fire situation, it may be necessary to release water, liquid extinguishing agents such as foam, or dry extinguishing agents.

In preparation for such a case, a container 12 filled with liquid extinguishing agent or powder extinguishing agent is provided.

When using these extinguishing agents, use a gaseous extinguishing agent container 9.
A part of the gas is filled with nitrogen or air, and as described above, these gases are guided through the pipe 9a, and the three-way valve 12a is operated to guide the gas into the filling container 12, so that a liquid or powder extinguishing agent is constantly supplied. The extinguishing agent is introduced into the empty main pipe 4C and discharged from the extinguishing agent discharge head 3 through the route as described above.

The extinguishing agent discharge head in this case may be a foam head or a powder head.

If a foam agent is used, a foamer may be connected to the outlet 2b of the automatic fire detection block selection valve.

17 is a warning siren.

As a method for effectively utilizing the fire extinguishing equipment according to the present invention, after discharging a gaseous extinguishing agent such as halon-based extinguishing agent for initial extinguishing, which causes only minor loss of property and human life, next There is a way to completely extinguish the fire by releasing extinguishing agent.

In this case, some of the gaseous extinguishing agent containers 9 are filled with a gaseous extinguishing agent such as halon, and the other gaseous extinguishing agent containers 9 are filled with foam extinguishing agent such as nitrogen gas or compressed air. Fill with gas capable of driving extinguishing agent or dry powder.

The automatic starting valve 10 connected to the former head is connected to the starting cylinder 8 through a copper pipe 8a, and the automatic starting valve 10 connected to the latter head is connected to the starting cylinder 8 by means of a copper pipe 8a (not shown in the figure). , so that it can be activated manually or by a separate remote control (not shown).

When a fire occurs, the fire sensing head 1 in the vicinity senses it, the air in the sensing pipe 1a is released, and the automatic fire block selection valve 2 is subsequently opened.

As a result, the pressure in the main pipe 4 and the pressure detection pipe 7 rapidly decreases through the extinguishing agent discharge pipe 3a, the automatic starting valve 6 is started, the starting cylinder 8 is opened, and the high pressure gas inside is released from the copper pipe 8a. Through this, some of the automatic starting valves 10 are activated.

The gaseous extinguishing agent container 9, which is filled with a gaseous extinguishing agent such as a halon-based extinguishing agent, releases the halon-based gas, passes through the three-way valve 12a, and the main pipe 4C, which is normally an empty pipe, , passes through the check valve 5a, enters the main pipe 4 which has already lost pressure, passes through the check valve 5 and automatic fire block selection valve, enters the extinguishing agent discharge piping 3a, and discharges the extinguishing agent. head 3
more released.

If it is necessary to continue using a foam fire extinguishing agent or dry powder fire extinguishing agent, open the gaseous fire extinguishing agent container 9 described above manually, guide nitrogen gas or compressed air into the pipe 9a, and operate the three-way valve 12a. The extinguishing foam or powder extinguishing agent can then be introduced into the filled container 12 and discharged by the route described above.

Since the present invention is constructed as described above, it does not use electricity, and the sensing mechanism and main piping 4 are normally operated only by the pressure of gas such as air, so it is safe and does not require an emergency power source.

Furthermore, since the fire extinguishing agent can be discharged only to the block where the fire occurred using the automatic fire block selection valve 2 and check valve 5, there is an advantage that the extinguishing agent can be extinguished without wasting it.

In conventional multi-use fire extinguishing equipment that uses two or more types of extinguishing agents, piping is done for each block separately, but in the present invention, only one main piping is required, and it is divided by a check valve 5a, and one It is convenient because one tube is filled with pressure gas for constant sensing, and the other is an empty, pressureless tube, so that it can be used as a variety of fire extinguishing equipment.

[Brief explanation of the drawing]

The drawing is a schematic diagram of the fire extinguishing equipment of the present invention. 1...Fire detection head, 2...Automatic fire block selection valve, 3...Extinguishing agent discharge head,
4...Main piping, 6...1 actuating starting valve, 8...
... Start cylinder, 9 ... Gas extinguishing agent filling container, 10 ... Yamakan start valve, 12 ...
Container filled with extinguishing agent other than gas.

Claims (2)

[Scope of utility model registration request] (1) A fire sensing head 1, an automatic fire block selection valve 2 opened by the sensing head, a fire extinguishing agent discharge head 3 connected to the outlet 2b of the automatic fire block selection valve, and the automatic fire sensing block selection A main pipe 4 connected to the inlet 2C of the valve and normally filled with high-pressure gas, a check valve 5a connected to the main pipe, and a drop in gas pressure resulting from the opening of the automatic fire block selection valve. a starting cylinder 8 equipped with an automatic starting valve 6 that operates; a gaseous extinguishing agent container 9 equipped with an automatic starting valve 10 that is activated by the pressure of gas released from the starting cylinder;
A three-way valve 12 provided in the discharge pipe 9a of the gaseous extinguishing agent container.
a, and a normally empty pipe 4C that connects the three-way valve 12a to the check valve 5a. (2) Powder and/or liquid fire extinguishing in the three-way valve 12a;
The fire extinguishing equipment according to claim 1, which is a utility model registration, and is formed by connecting a container 12 filled with a chemical agent.