JP5305444B2 - Sprinkler fire extinguishing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprinkler fire extinguisher which solves problems associated with a pre-action type sprinkler fire extinguisher that encloses air in a secondary side, such as delay in start of watering or the like, and prevents loss of water upon malfunctioning due to damage of a sprinkler head. <P>SOLUTION: A pre-action type sprinkler fire extinguisher is provided in which the secondary pipe 3 connected to a secondary side of an alarm valve 1 is filled with a pressurized fire extinguishing agent 11 being liquid at room temperature, volatile, having insulating property, and fire extinguishing capacity. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a sprinkler fire extinguishing equipment, and more particularly to a pre-actuated sprinkler fire extinguishing equipment.

  The pre-actuated sprinkler fire extinguishing equipment is equipment that starts water discharge when both the fire detector and the sprinkler head are activated (see Patent Document 1). In such a pre-acting sprinkler fire extinguishing equipment, the secondary side pipe connected to the secondary side of the alarm valve (running water detection device) is usually filled with compressed air and the pressure is monitored. It is confirmed that there is no leakage from the secondary piping or damage to the sprinkler head. Pre-acting sprinkler fire extinguishing equipment is reliable against water damage due to breakage or malfunction because water does not enter the secondary side piping, or one of the sensor and sprinkler head does not discharge. It can be said that the equipment is expensive.

Japanese Patent No. 3099233

However, the pre-actuated sprinkler fire extinguishing equipment has the following problems.
(A) When the sprinkler head is activated, water does not come out of the sprinkler head until the compressed air in the secondary side pipe is completely discharged, so that the start of water discharge is delayed.
(B) In order to reduce the delay in starting water discharge, the upper limit of the pipe volume of the secondary side pipe is determined based on the pipe diameter of the secondary side pipe. For this reason, when considering use in actual equipment, the diameter of the alarm valve or the pipe becomes large.
(C) It is necessary to increase the number of sprinkler heads simultaneously opened to 1.5 times the number of wet sprinkler fire extinguishing equipment in order to cope with the fire expansion due to the delay of the start of water discharge. For this reason, the amount of water source water increases.
(D) The compressed air filled in the secondary side pipe is more likely to leak from the screwed part of the pipe as compared with a liquid such as water. Therefore, equipment such as an air compressor is necessary to compensate for such a slight leak.
(E) When a downward sprinkler head is used, water that has passed through during the pressure test remains in the falling pipe and cannot be discharged unless the sprinkler head is removed. It is easy to corrode.
In addition, when using a pre-charged flow detection device that fills the secondary pipe with water, the above-mentioned problems with the pre-actuated sprinkler fire extinguishing equipment in which compressed air is sealed in the secondary pipe are: Although it can be eliminated, water in the secondary side pipe is released when the sprinkler head is damaged by external force or the like. However, even if the amount of water is small, there is a possibility of adversely affecting electrical equipment and documents.

  The present invention has been made to solve such a problem, and solves problems such as a delay in the start of water discharge of the pre-acting sprinkler fire extinguishing equipment which encloses air on the secondary side and malfunctions due to damage to the sprinkler head. The purpose is to provide a sprinkler fire extinguishing system that can prevent water loss at the time.

(1) The sprinkler fire extinguishing equipment according to the present invention includes an alarm valve, a secondary side pipe connected to the secondary side of the alarm valve, and a primary side pipe connected to the primary side of the alarm valve. Pre-acting sprinkler fire extinguishing equipment,
The secondary side pipe is liquid at room temperature, highly volatile, electrically insulating and extinguishing with a fire extinguishing agent, and the primary side pipe is filled with fire-extinguishing water. It is characterized by this.

(2) The thing as described in said (1) WHEREIN: The said fire extinguishing agent consists of ether which has 3 or more carbon atoms and fluorine substitution is performed.

(3) In the above (1) or (2), a fire extinguishing agent replenishment pipe communicating with the secondary side pipe is provided, and the fire extinguishing agent replenishment pipe is filled into the secondary side pipe via a pressure regulating valve. Connect a cylinder filled with extinguishing agent at a pressure higher than the pressure of the extinguishing agent, and when the pressure of the extinguishing agent in the secondary side pipe drops, the extinguishing agent in the cylinder fills the secondary side pipe In addition, an opening / closing valve and a monitoring pressure drop alarm pressure switch are provided in the fire extinguishing agent replenishment pipe, and the opening / closing valve is closed based on a signal from the monitoring pressure drop alarm pressure switch. It is a feature.

In the present invention, the secondary side pipe connected to the secondary side of the alarm valve in the pre-actuated sprinkler fire extinguishing equipment is liquid at room temperature, has volatility, and does not short-circuit even when applied to the electrical equipment. By enclosing a fire extinguishing agent that is electrically insulating and has a fire extinguishing ability by cooling action and suffocation action, the following effects can be obtained.
・ Because the fire extinguishing agent is released until the start of water discharge in the event of a fire, there is no need to consider the delay in starting water discharge.
・ Because there is no delay in the start of water discharge, the diameter of the water flow detector, piping, etc. can be made as small as a wet sprinkler fire extinguishing equipment, so the cost of equipment can be reduced.
-Since there is no delay in the start of water discharge, the number of sprinkler heads that can be opened simultaneously can be the same as for wet sprinkler fire extinguishing equipment, and the amount of water source can be reduced. Also, there is no restriction on the secondary pipe volume.
・ For example, even if the sprinkler head is damaged by an external force, the fire extinguishing agent has electrical insulation, so it does not adversely affect the electrical equipment. In addition, since it has volatility, it evaporates immediately even if a fire extinguisher is applied to the document, so that the document is not adversely affected.
-It is only necessary to install a high-pressure pressurized cylinder filled with a fire extinguishing agent for each running water detection device, eliminating the need for an air compressor that is required when enclosing air.

It is explanatory drawing of the sprinkler fire extinguishing equipment which concerns on one embodiment of this invention.

  FIG. 1 is an explanatory diagram of a pre-actuated sprinkler fire extinguishing facility according to an embodiment of the present invention. The pre-actuated sprinkler fire extinguishing equipment according to the present embodiment includes an alarm valve 1, a secondary side pipe 3 connected to the secondary side of the alarm valve 1, and a primary side pipe connected to the primary side of the alarm valve 1. 5 is provided. A closed sprinkler head 7 is provided on the secondary side pipe 3, and a terminal test valve 9 is provided at the end of the secondary side pipe 3. The secondary side pipe 3 is filled with a fire extinguishing agent 11 (hereinafter simply referred to as “extinguishing agent 11”) made of dodecafluoro-2-methylpentan-3-one. The primary side pipe 5 is filled with fire-extinguishing water 13.

In addition, when the extinguishing agent 11 leaks from the secondary side pipe 3, a fire extinguishing agent replenishing device 15 is connected to the secondary side piping 3 for replenishing the extinguishing agent 11 corresponding to the leakage. This extinguishing agent replenishing device 15 is connected to the extinguishing agent replenishing pipe 17 communicating with the secondary side pipe 3, the pressure regulating valve 19 provided in the middle of the extinguishing agent replenishing pipe 17, and the end of the extinguishing agent replenishing pipe 17. And a fire extinguisher cylinder 21 filled with a fire extinguishing agent under pressure. The fire extinguisher cylinder 21 is filled with a fire extinguisher filled at a pressure higher than the pressure in the secondary pipe 3.
In addition to the above devices, the fire extinguishing agent replenishment pipe 17 is provided with a check valve 23, a pressure switch 25 for monitoring pressure drop alarm, and an on-off valve 27.
Pressure regulating valve 19 is adapted to set the pressure in the secondary side piping 3 to a predetermined pressure, for example, when the pressure of the extinguishing agent in the cylinder was 4 Kg / cm ^2, pressure reducing this to 1Kg / cm ² Then, the secondary side pipe 3 is supplied.
The fire extinguishing agent replenishment pipe 17 is connected to a drain pipe 29 for draining water charged when an operation test is performed, and a drain valve 31 is provided in the drain pipe.

Here, a fire extinguisher composed of dodecafluoro-2-methylpentan-3-one filled in the secondary side pipe 3 will be described.
The fire extinguishing agent in the present invention is (a) liquid at normal temperature, (b) low boiling point (48 ° C. to 80 ° C.), high volatility compared to water, (c) high electrical insulation, (d) It is an example of a fire extinguishing agent having the property of having a fire extinguishing ability.
Dodecafluoro-2-methylpentan-3-one is a fluorine-based chemical substance represented by the referential formula CF ₃ CF ₂ C (O) CF (CF ₃ ) ₂ . This fluorine-based chemical substance has an ODP (ozone depletion coefficient) of 0, a GWP (global warming potential) of close to 1 and an insulating property, etc., and a boiling point of 48 near the normal temperature range. Since it has a low boiling point of ° C., it has physical properties that it is highly volatile and quick-drying compared to fire extinguishing water that is normally used. The fire extinguishing agent 11 need not be limited to the above-described drug, and may be any drug having the above physical properties. Examples thereof include ethers having 3 or more carbon atoms, specifically about 4 to 8 carbon atoms, and fluorine substitution.

Again, the pre-actuated sprinkler fire extinguishing equipment of this embodiment will be described based on FIG.
The alarm valve 1 is provided with a piston chamber 33, and the piston 34 moves by changing the water pressure in the piston chamber 33, thereby closing or communicating the primary side and the secondary side. As a mechanism for changing the water pressure of the piston chamber 33, a water filling pipe 35 for filling the piston chamber 33 with water of the primary side pipe 5 and a drain pipe 37 for draining the water of the piston chamber 33 are provided. It has been. The filling pipe 35 is provided with an orifice 36. Moreover, the drain pipe 37 is branched into two in the middle, and an electromagnetic valve 38 is provided in one pipe, and a manual activation valve 39 is provided in the other pipe. The branched pipe is connected at the tip end side, and a pressure switch 40 for water discharge warning is provided on the pipe after the connection.
The alarm valve 1 is provided with a test valve 41 for confirming the operation of the pressure switch for the water discharge alarm.

The electromagnetic valve 38, the pressure switch 40 for water discharge warning, the pressure switch 25 for monitoring pressure drop warning, and the on-off valve 27 are electrically connected to the control panel 43, and exchange of signals and operation control are performed.
The signal from the fire detector 45 is sent to the fire receiver 47, and the signal from the fire receiver 47 is sent to the control panel 43 to control the operation of the alarm valve 1.

The operation of the present embodiment configured as described above will be described separately for monitoring, testing, fire, and malfunction.
<When monitoring>
At the time of monitoring, the solenoid valve 38 and the manual start valve 39 are closed, the fire extinguishing water 13 of the primary side pipe 5 enters the piston chamber 33 of the alarm valve 1 through the orifice 36, and the alarm valve 1 is closed. It has become. At the time of monitoring, the on-off valve 27 is open and the secondary pipe 3 is filled with the fire extinguishing agent 11 at a predetermined pressure.
Since monitoring takes a long period of time, the extinguishing agent 11 filled from any part of the secondary side pipe 3 may leak and the pressure may drop, but at this time, the cylinder is connected via the pressure regulating valve 19. The inside extinguishing agent is appropriately filled.
But since the fire extinguisher 11 with which it is filled is a liquid, since the fire extinguisher itself has viscosity compared with the case where gas, such as the conventional example, is filled, it is hard to leak.

<During testing>
At the time of a water discharge test performed when the equipment is installed, the fire detector 45 is operated by heating or the like, and the solenoid valve 38 is opened through the operation of the fire receiver 47 and the control panel 43 by the signal. When the electromagnetic valve 38 is opened, the water in the piston chamber 33 is discharged, the pressure in the piston chamber 33 is reduced, and the alarm valve 1 is opened. The opening of the alarm valve 1 is detected by the pressure switch 40 for water discharge alarm, and the operation of the alarm valve 1 can be confirmed, that is, the presence or absence of the water discharge alarm can be confirmed.
When the alarm valve 1 is opened and the terminal test valve 9 is opened, the fire extinguishing water 13 in the primary side pipe 5 flows into the secondary side pipe 3. At this time, the falling pipe connecting the closed sprinkler head 7 and the secondary side pipe 3 is filled with the fire extinguishing water 13, and then the secondary side pipe 3 is filled with the fire extinguishing agent 11. Therefore, after the water discharge test, even if water remains in the standing pipe, the water extinguishing agent 11 is filled at the boundary with the water, and the boundary between the fire extinguishing water 13 and the air that causes rusting can be created. Therefore, there is no concern about the occurrence of rust, which is a concern when the secondary side pipe 3 of the conventional example is filled with air.

  The end test valve 9 is opened, a dummy water discharge is performed for one closed sprinkler head, and it is examined whether or not a pressure higher than a predetermined pressure is generated in the end test valve 9 at the farthest point. After this water discharge test, the extinguishing water 13 is made in the piston chamber 33 by closing the electromagnetic valve 38, the alarm valve 1 is closed, and the water in the secondary pipe 3 is drained by opening the end test valve 9. Thereafter, the end test valve 9 is closed, the drain valve 31 around the alarm valve 1 is opened, and the fire-extinguishing water 13 in the secondary vertical pipe 3 immediately after the alarm valve 1 is discharged.

  When drainage of the fire extinguishing water 13 from the secondary side pipe 3 is completed, the extinguishing agent 11 is filled in the secondary side pipe 3 by opening the on-off valve 27 of the extinguishing agent filling device 15. At this time, the pressure of the extinguishing agent 11 in the secondary side pipe 3 is adjusted to a predetermined pressure by the pressure regulating valve 19 and is maintained thereafter.

  The above test is performed when the pre-actuated sprinkler fire extinguishing equipment is installed, but in normal periodic inspection after installing the equipment, when the alarm valve 1 is opened, the secondary pipe 3 is filled. The fire extinguishing agent 11 is wasted. Therefore, in such a normal inspection, the test valve 41 may be opened to confirm the operation of the pressure switch 40 for water discharge alarm.

<In case of fire>
When a fire occurs, the alarm valve 1 is opened by the same operation as described in the test. When the alarm valve 1 is opened, pressure water flows into the secondary side and issues a water discharge alarm. Further, when the fire spreads, the closed sprinkler head 7 is opened by the heat, and the fire extinguishing agent 11 is released. The fire extinguishing agent 11 is made of dodecafluoro-2-methylpentan-3-one and has a fire extinguishing capability by itself, so that there is no problem of fire extinguishing delay.
In addition to these three elements, (a) take away heat, (b) take away combustibles (burning things), and (c) take up oxygen as elements for extinguishing the fire. Can be mentioned. In addition to lowering the oxygen concentration, the fire extinguisher 11 of the present embodiment can take heat when the fire extinguisher 11 evaporates and break the fire chain, so it can be said that it is optimal for initial fire extinguishing. In other words, filling the secondary pipe 3 of the pre-actuated sprinkler fire extinguishing equipment with the extinguishing agent 11 is not a negative effect that the delay of the initial extinguishing does not occur, but rather the positive that the initial extinguishing can be ensured. Has an effect.

After the extinguishing of the fire extinguishing agent 11, the water discharge of the fire extinguishing water 13 is started. When the pressure in the pipe drops due to the flow and discharge of the fire-extinguishing water 13 in the pipe, a pressure switch provided in a pressure air tank (not shown) operates to send a pump start signal to the pump control panel. The pump is operated and the water discharge is subsequently extinguished.
Moreover, although the fire extinguishing water 13 having a pressure higher than the monitoring pressure flows during the discharge, the check valve 23 can prevent the fire extinguishing water 13 from flowing into the extinguishing agent replenishing device. Further, since the pressure regulating valve 19 is provided, the fire extinguishing agent 11 can be prevented from flowing out to the secondary side pipe 3 side more than necessary in the discharge water in which the fire extinguishing water 13 higher than the monitoring pressure is flowing.

<In case of malfunction>
For example, when the sprinkler head is opened due to a physical impact, the fire extinguishing agent 11 filled in the secondary side pipe 3 is released. However, since the fire extinguishing agent 11 to be released is made of dodecafluoro-2-methylpentan-3-one, there is no fear of water loss.
In the case of such a malfunction, the on-off valve 27 is closed by a signal from the control panel 43 that has received this signal by the operation of the pressure switch for monitoring pressure drop alarm, so that the extinguishing agent 11 Can be wasted.

As described above, according to the present embodiment, the secondary pipe 3 is filled with the extinguishing agent 11 having the extinguishing ability, and the extinguishing agent 11 having the extinguishing ability is discharged during the initial extinguishing. Since there is no need to consider the start delay, the diameter of the alarm valve 1, piping, etc. can be made as small as the wet sprinkler fire extinguishing equipment, and the number of sprinkler heads that can be opened simultaneously can be the same as the wet sprinkler fire extinguishing equipment. Can be less.
On the other hand, even if the sprinkler head is damaged by an external force, it does not adversely affect electrical equipment and documents as in the case of the water-filled type.
The excellent effects as described above are caused not by the effects of the extinguishing agent 11 itself but by the effects of the extinguishing agent 11. However, the extinguishing agent 11 having such properties is pre-actuated. This is because only the secondary side pipe 3 of the sprinkler fire extinguishing equipment is filled.

  The fire extinguisher cylinder 21 described in the above embodiment may be provided for each alarm valve 1, or several fire extinguishant cylinders may be integrated into one place and shared by all the alarm valves 1. .

  In addition, the extinguishing agent in the extinguishing agent cylinder described in the above embodiment may be confirmed by checking the remaining amount at the time of inspection, and replacing the entire cylinder if the remaining amount is small.

DESCRIPTION OF SYMBOLS 1 Alarm valve 3 Secondary side piping 5 Primary side piping 7 Closed type sprinkler head 9 Terminal test valve 11 Extinguishing agent 13 Fire extinguishing water 15 Extinguishing agent replenishing device 17 Extinguishing agent replenishing pipe 19 Pressure regulating valve 21 Extinguishing agent cylinder 23 Check valve 25 Monitoring Pressure switch for pressure drop alarm 27 Open / close valve 29 Drain pipe 31 Drain valve 33 Piston chamber 34 Piston 35 Filled pipe 36 Orifice 37 Drain pipe 38 Solenoid valve 39 Manual start valve 40 Pressure switch for water discharge alarm 41 Test valve 43 Control panel 45 Fire detector 47 Fire receiver

Claims (3)

A pre-acting sprinkler fire extinguishing equipment comprising a warning valve, a secondary pipe connected to the secondary side of the warning valve, and a primary pipe connected to the primary side of the warning valve,
The secondary side pipe is liquid at room temperature, highly volatile, electrically insulating and extinguishing with a fire extinguishing agent, and the primary side pipe is filled with fire-extinguishing water. Pre-actuated sprinkler fire extinguishing equipment characterized by   The pre-actuated sprinkler fire extinguishing equipment according to claim 1, wherein the fire extinguishing agent is made of ether having 3 or more carbon atoms and fluorine substitution. A fire extinguisher replenishment pipe communicating with the secondary side pipe is provided, and a cylinder filled with the fire extinguisher at a pressure higher than the pressure of the fire extinguisher filled in the secondary side pipe is connected to the fire extinguisher replenishment pipe via a pressure regulating valve. When the pressure of the extinguishing agent in the secondary side pipe decreases, the extinguishing agent in the cylinder is replenished in the secondary side piping, and an on-off valve and a monitor are provided on the extinguishing agent supplementing pipe. The pre-actuated sprinkler fire extinguishing equipment according to claim 1 or 2 , wherein a pressure switch for pressure drop warning is provided, and the on-off valve is closed based on a signal from the pressure switch for monitoring pressure drop warning. .

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