JP2014046031A - Sprinkler fire-extinguishing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler fire-extinguishing apparatus capable of quickly detecting the actuation of a sprinkler head and starting fire extinguishing at early stage with a simple configuration, regarding a pre-operation type sprinkler fire-extinguishing apparatus which prevents leakage of water from a pipeline by usually setting the interior of a secondary side pipeline to negative pressure.SOLUTION: In a pre-operation type sprinkler fire-extinguishing apparatus in which a secondary side piping is usually set to negative pressure, a sprinkler head is provided with a concealed part to be dropped by heat of a fire and drop detection means for the concealed part. The apparatus includes a control part for controlling a pre-action value to open when both of fire detection means provided on a protection section of the sprinkler head and the concealed part drop detection means are operated.

Description

  The present invention relates to a sprinkler fire extinguishing equipment, and more particularly to a preacting sprinkler fire extinguishing equipment in which a secondary side pipe of a preacting valve is in a negative pressure state.

  Conventionally, there is a dry pressurization type pre-actuated sprinkler fire extinguishing equipment that fills the secondary side pipe to which the sprinkler head is connected with compressed gas and has a pre-actuated valve on the base end side of the secondary side pipe. . Such a sprinkler fire extinguishing equipment is activated by a fire detector, which is a fire detection means installed in the same protection area as the sprinkler head, or by both fire detection means and sprinkler head operation detection means in the event of a fire. The pre-actuating valve is opened and the secondary side pipe is filled with water.

  In such a sprinkler fire extinguishing system, the secondary piping is not always filled with water, and the pre-actuating valve will not open if the sprinkler head is damaged. Hard to occur.

  However, even if the secondary side pipe is drained after completion of the water flow test at the time of completion or periodic inspection, water may remain in the falling pipe portion to which the sprinkler head is connected. If water remains in the falling pipe, it may react with oxygen in the piping and the falling pipe may be corroded.If the sprinkler head is damaged, water remaining in the falling pipe leaks and causes water loss. It may happen.

  Therefore, a pre-acting sprinkler fire extinguishing equipment has been proposed in which a vacuum pump is connected to the secondary side pipe and the inside of the pipe is set to a negative pressure (see, for example, Patent Document 1). In this negative pressure type pre-actuated sprinkler fire extinguishing equipment, the secondary side pipe becomes negative pressure air instead of compressed gas, so that the above-mentioned corrosion and water leakage hardly occur. In such a conventional negative pressure type pre-acting sprinkler fire extinguishing equipment, as a sprinkler head operation detecting means, when the pressure in the secondary side pipe exceeds a predetermined pressure, or the rate of pressure increase in the secondary side pipe is A pressure detecting means that operates when a predetermined value is exceeded is disclosed (see Patent Documents 1 and 2).

  On the other hand, conventionally, there is a wet pressurization type pre-actuated sprinkler fire extinguishing equipment in which a secondary side pipe connected to a sprinkler head is filled with pressurized water and a pre-actuation valve is provided on the base end side of the secondary side pipe. is there. Such a sprinkler fire extinguishing equipment is activated by a fire detector, which is a fire detection means installed in the same protection area as the sprinkler head, or by both fire detection means and sprinkler head operation detection means in the event of a fire. The pre-actuating valve is opened and the secondary side pipe is filled with water.

  In such a sprinkler fire extinguishing equipment, the pre-actuated valve does not open only when the sprinkler head is broken, so that the pressurized water supply device does not start. However, since the secondary side pipe is always filled with water, there is a possibility that water in the pipe leaks to cause water loss although it is not a fire.

  In view of this, a wet pre-acting sprinkler fire extinguishing system has been proposed in which a vacuum pump is connected to the secondary side pipe and the inside of the pipe is set to a negative pressure (see, for example, Patent Document 3). In such a sprinkler fire extinguishing system, since the secondary side pipe has negative pressure water, the above-described water leakage is unlikely to occur as long as suction exceeding the total head resistance of the installed pipe is performed.

  By the way, the conventional closed type sprinkler head includes a valve body that is supported by the thermal decomposition mechanism and closes the water outlet. The thermal decomposition mechanism is actuated and dropped by the heat of the fire, and at the same time, the valve body is dropped, and the water outlet in the sprinkler head is opened to discharge water.

  However, if a conventional closed-type sprinkler head is installed in a conventional negative-pressure type pre-acting sprinkler fire extinguishing system as described above, the pressure in the secondary pipe will remain negative even if the thermal decomposition mechanism of the sprinkler head is activated due to a fire. Therefore, the valve body is sucked into the secondary piping side and does not open. It is the same whether it is a dry type that does not fill the secondary side pipe or a wet type that charges the secondary side pipe. That is, the pressure in the secondary side pipe does not increase.

  In such a case, the operation of the sprinkler head cannot be detected when the pressure in the secondary side pipe is equal to or higher than the predetermined pressure or the rate of increase in pressure in the secondary side pipe is equal to or higher than the predetermined value.

  Therefore, in order to open the internal valve body when the thermal decomposition mechanism is activated by a fire, an urging means that constantly urges the valve body in the opening direction against the negative pressure in the secondary side pipe. There has been proposed a sprinkler head provided with (for example, see Patent Document 4).

  If a sprinkler head provided with such an urging means is used, it can be opened against a negative pressure in the secondary side pipe in the event of a fire. Accordingly, it is possible to detect the operation of the sprinkler head when the pressure in the secondary side pipe is equal to or higher than the predetermined pressure or the pressure increase rate in the secondary side pipe is equal to or higher than the predetermined value.

On the other hand, there is a type in which the pre-actuated valve is opened when the fire sensor is activated regardless of whether the sprinkler head is activated (see, for example, Patent Document 3).
Such sprinkler fire extinguishing equipment must stop the suction of the secondary side piping by closing the piping from the vacuum pump, etc., in order to be able to discharge water from the sprinkler head that was activated in the event of a fire. However, the fire detector may malfunction due to factors other than fire, and if the sprinkler head is damaged at such a time, the pressurized water feeding device may start and cause a large water loss.

Japanese Utility Model Publication No. 6-26292 JP 2010-233894 A Republished patent WO00-61238 Japanese Patent Laid-Open No. 11-206908

  The present invention has been made in order to solve such a problem in a pre-acting sprinkler fire extinguishing facility in which the pressure in the secondary side pipe is always negative.

  And, without using a special sprinkler head having a biasing means for always biasing in the direction of opening the plug, a sprinkler fire extinguishing facility capable of quickly detecting the operation of the sprinkler head due to fire and starting fire extinguishing quickly with a simple configuration is obtained. For the purpose.

  It is another object of the present invention to prevent water from leaking from a damaged sprinkler head when the sprinkler head is damaged even when a fire sensor malfunctions.

  The sprinkler fire extinguishing equipment according to the present invention detects a fire in a pre-acting valve, a secondary pipe provided on the secondary side of the pre-acting valve, to which the sprinkler head is connected, and a section protected by the sprinkler head. In a pre-actuated sprinkler fire extinguishing equipment comprising a fire detection means and a vacuum pump that is connected to the secondary side pipe and normally makes a negative pressure in the secondary side pipe, the sprinkler head The sprinkler head main body is covered at the time of fire, and in the event of a fire, there is a conshield portion that falls from the sprinkler head main body due to the heat of the fire, and a conshield portion drop detection means that detects the fall of the conshield portion. And a first control means for controlling the pre-actuating valve to be opened when both the fire detection means and the conshield part drop detection means are activated. The features.

  The sprinkler fire extinguishing equipment according to the present invention includes an on-off valve that electrically opens and closes a vacuum pipe interposed between the secondary side pipe and the vacuum pump, the fire detection means, and the conshield part drop detection means. It has a 2nd control means which controls to close the said on-off valve when both act | operate.

  Further, the sprinkler fire extinguishing equipment according to the present invention is configured such that a valve body is disposed in a vacuum pipe interposed between the secondary pipe and the vacuum pump in a direction of the secondary pipe against the suction force of the vacuum pump. And a urging unit that urges and opens the valve, and a valve body that opens when the pre-actuating valve is opened and a predetermined water pressure is applied from the secondary pipe side. And

  Moreover, the sprinkler fire extinguishing equipment according to the present invention has third control means for controlling to stop the operation of the vacuum pump when both the fire detection means and the conshielded part drop detection means are activated. It is characterized by that.

  Moreover, the sprinkler fire extinguishing equipment according to the present invention has a single mode in which the first to third control means excludes the operation of the fire detection means from the control condition and uses the operation of the conshielded part drop detection means as a control condition. It is characterized by having.

  The sprinkler fire extinguishing equipment according to the present invention is characterized in that the primary or secondary piping of the pre-actuating valve has a flow rate control means for limiting the water discharge flow rate when the pre-actuating valve is open to a predetermined flow rate. To do.

  According to the sprinkler fire extinguishing equipment according to the present invention, the pre-actuating valve is opened when both the conshield part drop detecting means and the fire detecting means are actuated. Even if there is no urging means for urging the valve body in the direction of opening, it can be extinguished and extinguished in the event of a fire. Further, water damage when the sprinkler head is damaged can be prevented.

  Further, according to the sprinkler fire extinguishing equipment according to the present invention, when both the conshield part drop detecting means and the fire detecting means are activated, the pre-actuating valve is opened and the on-off valve is provided. Since the vacuum pipe is closed, fire-extinguishing water does not flow into the vacuum pump, and the vacuum pump is not damaged due to high load.

  Further, according to the sprinkler fire extinguishing equipment according to the present invention, when the pre-actuating valve is opened, the check valve provided in the vacuum pipe is closed by the water pressure of the secondary side pipe. The fire-fighting water does not flow into the vacuum pump, and the vacuum pump is not damaged due to high load.

  Further, according to the sprinkler fire extinguishing equipment according to the present invention, the operation of the vacuum pump is stopped when both the conshield part drop detecting means and the fire detecting means are activated. Will not break under high load. In addition, even if the on-off valve or check valve provided in the vacuum pipe is closed and the vacuum pipe is closed, the vacuum pump operation is stopped, so the operation is not closed and a high load is applied to the vacuum pipe and the vacuum pump. It won't break.

  Further, according to the configuration of claim 5, the sprinkler fire extinguishing equipment according to the present invention is set to the single mode even when the fire detection means is not functioning due to inspection or repair work of the automatic fire alarm equipment. The fire can be monitored and extinguished by the conshielded unit drop detection means.

  Further, according to the sprinkler fire extinguishing equipment according to the present invention, the flow rate of the fire-extinguishing water flowing through the pressurized water supply device is the secondary side even when the secondary side pipe is negative pressure air. Even if it is sucked from the pipe, it is limited to a predetermined flow rate, so that it is possible to prevent the occurrence of water hammer due to an excessive flow rate.

1 is a configuration diagram of a dry sprinkler fire extinguishing facility according to Embodiment 1. FIG. It is a block diagram of the wet sprinkler fire extinguishing equipment which concerns on Embodiment 2. FIG.

[Embodiment 1]
A sprinkler fire extinguishing facility according to Embodiment 1 of the present invention will be described with reference to FIG.
<Configuration of sprinkler fire extinguishing equipment>
First, the configuration of the first embodiment will be described.

  The sprinkler fire extinguishing equipment of the present embodiment is a dry negative pressure pre-acting sprinkler fire extinguishing equipment that uses negative pressure air without filling the secondary side pipe 12 under normal conditions.

  The sprinkler head 2, the pre-actuating valve 22, the primary side pipe 11, the secondary side pipe 12, the vacuum pipe 14, the vacuum pump 24, the on-off valve 31, the vacuum switch 53, the pressurized water supply device 21, and the constant flow control means. It is comprised from the flow valve 23, the fire-extinguishing water tank 10, the repeater 51, the fire-extinguishing system control board 5, the fire-extinguishing pump control board 6, and the vacuum pump control board 52, etc.

  A plurality of sprinkler heads 2 are provided in a protective section 1 that is a section for monitoring and extinguishing a fire. Each of the plurality of sprinkler heads 2 is connected to the falling pipe 13. Further, each of the falling pipes 13 is connected to the secondary pipe 12 that is not normally filled with water.

  One end (base end side) of the secondary pipe 12 is connected to one end (secondary side) of the pre-actuating valve 22 that is normally closed and is electrically opened in the event of a fire. The The other end (primary side) of the pre-actuating valve 22 is connected to one end of the primary side pipe 11. Further, the other end (base end side) of the primary side pipe 11 is connected to the pressurizing water supply device 21 via a constant flow valve 23 as a flow rate control means for restricting the water supply flow rate at the time of fire occurrence to a predetermined value. Connected to the discharge port.

  In this embodiment, the constant flow valve 23 is provided on the primary side of the pre-actuating valve 22, but may be provided on the secondary side of the pre-acting valve 22.

  On the other hand, the other end of the secondary pipe 12 is connected to one end of the terminal test valve 25. A drain pipe 16 is connected to the other end of the terminal test valve 25. Water filled in the secondary side pipe 12 by a water leak test or the like of the sprinkler fire extinguishing equipment is discharged to the outside by opening drain valves (not shown) provided in the end test valve 25 and the pre-actuating valve 22. In the normal monitoring state, the end test valve 25 is closed.

  In addition, one end of a vacuum pipe 14 is connected to the secondary side pipe 12. A vacuum pump 24 is connected to the other end of the vacuum pipe 14, and the secondary side pipe 12 is set to a negative pressure via the vacuum pipe 14 in normal times.

  The vacuum pipe 14 is provided with an on-off valve 31 described later. A vacuum switch 53 is connected to the vacuum pipe 14, and the vacuum pump 24 is controlled via the vacuum pump control panel 52 so that the internal pressure of the vacuum pipe 14 becomes a predetermined value or less.

  The sprinkler head 2 includes a known sprinkler comprising a conshield part 2a that falls due to the heat of a fire, and a conshield part fall detection switch 2b that is a conshield part fall detection means that operates when the conshield part 2a falls. Head. Since it is disclosed in detail in Japanese Patent No. 3925596, the description thereof is omitted, but the description of the above-mentioned patent publication is incorporated. The conshielded part drop detection switch 2b is electrically connected to the fire extinguishing system control panel 5 via the relay 51, and sends a conshielded part fall signal to the firefighting system control panel 5.

  Moreover, the fire detector 3 and the fire receiver 4 as a fire detection means are provided as automatic fire alerting | reporting equipment which monitors a fire. The protective section 1 is provided with a fire detector 3 for monitoring a fire that has occurred in the protective section 1, and the fire detector 3 is electrically connected to the fire receiver 4.

  Then, the fire receiver 4 that has received the fire alarm of the fire detector 3 uses a fire judgment algorithm (for example, a well-known storage function or the like prescribed in the Ordinance of the Ministry of Internal Affairs and Communications that defines the technical standards of the fire receiver). A fire determination is made and a fire signal is sent to the fire extinguishing system control panel 5 when a fire is determined. This fire determination algorithm may be provided in the fire detector 3.

  In general, many fire detectors 3 self-hold when a fire is triggered. Therefore, even if the fire detector 3 malfunctions due to transient noise or the like, many self-hold the fire alarm state. Therefore, the fire judgment in the fire receiver 4 should not be so easy as to simply delay the fire alarm signal of the fire detector 3. This is because the provision of such a thing only delays the manifestation of malfunction.

  The fire extinguishing system control panel 5 is connected to the pre-actuating valve 22 via the repeater 51. Specifically, a remote start valve 22b, which is an electric pilot valve that drives the pre-actuating valve 22, and a water flow signal switch 22a serving as a water flow detecting means for detecting the flow of fire-extinguishing water due to the opening of the pre-acting valve 22 are electrically connected. Connected to. Furthermore, the on / off valve 31 and the conshielded part drop detection switch 2 b of the sprinkler head 2 are also electrically connected via the repeater 51.

  The fire extinguishing system control panel 5 receives the conshielded part drop signal from the conshielded part fall detection switch 2 b of the sprinkler head 2 via the repeater 51.

  In addition, you may comprise so that the said apparatus connected to the repeater 51 may be directly connected to the fire extinguishing system control panel 5 without providing the repeater 51, and is selected suitably.

  The fire-extinguishing system control panel 5 includes first control means (not shown) that controls the pre-actuating valve 22 by the conshielded part falling signal and the fire signal from the fire receiver 4.

  Further, the fire extinguishing system control panel 5 includes second control means (not shown) for controlling the on-off valve 31 by the conshield part drop signal and the fire signal from the fire receiver 4. The on-off valve 31 is an electric on-off valve provided in the vacuum pipe 14 interposed between the secondary side pipe 12 and the vacuum pump 24.

  The on-off valve 31 may be a mechanical valve that is controlled to close in conjunction with the opening of the pre-actuating valve 22 instead of the electric on-off valve.

  For example, a check having an urging means for opening an internal valve body against the negative pressure of the secondary side pipe 12 and a valve body that closes when a predetermined water pressure is applied from the secondary side pipe 12 side. It may be a valve. If comprised in this way, the valve | bulb will be opened by the said urging | biasing means at normal time, and the secondary side piping 12 can be attracted | sucked by the vacuum pump 24, and a negative pressure can be maintained. Further, in the event of a fire, when the pre-actuating valve 22 is opened and fire extinguishing water is pumped to the secondary side pipe 12, the water pressure is closed. When the on-off valve 31 is configured in this way, the second control means described above is unnecessary.

  Further, the fire extinguishing system control panel 5 includes third control means (not shown) for controlling the vacuum pump 24 by the conshielded part falling signal and the fire signal from the fire receiver 4.

  The first to third control means may be provided individually as a control circuit inside the fire extinguishing system control panel 5, but may be provided as an integrated control device, for example, a control device controlled by a CPU and software. Selected.

  The fire pump control panel 6 is electrically connected to a pressure detection means (not shown) provided in the pressurized water supply device 21 and the primary side pipe 11. During normal operation, the primary side pipe 11 is filled with a predetermined pressure. When the pressure detecting means detects a pressure reduction due to the opening of the pre-actuating valve 22, the pressurized water supply device 21 is started and water for fire extinguishing is supplied from the fire extinguishing water tank 10. Pump.

  The vacuum pump control panel 52 is also electrically connected to the fire extinguishing system control panel 5 and controls to stop the operation of the vacuum pump 24 by a signal from the above-described third control means in the event of a fire.

Note that the vacuum pump control panel 52 may autonomously control the fire extinguishing pump 24 as will be described later, without depending on the signal from the fire extinguishing system control panel 5.
<Operation of sprinkler fire extinguishing equipment>
Hereinafter, the operation of the sprinkler fire extinguishing facility according to Embodiment 1 will be described.

  This sprinkler fire extinguishing equipment has drained water in the secondary side pipe 12 in advance before starting operation. In normal operation (monitoring state) after the start of operation, the secondary side pipe 12 is not filled with water, the vacuum pump 24 is activated, and the negative pressure in the secondary side pipe 12 and the vacuum pipe 14 is lower than atmospheric pressure. This is a dry negative pressure pre-acting sprinkler fire extinguishing system.

  In these secondary side pipes 12 and vacuum pipes 14, air gradually flows in from the connecting part between the falling pipe 13 and the sprinkler head 2, and the negative pressure in the pipe gradually increases (to atmospheric pressure). it's coming). When the vacuum switch 53 detects that the negative pressure in the secondary side pipe 12 and the vacuum pipe 14 is equal to or higher than a predetermined pressure, the vacuum pump control panel 52 operates the vacuum pump 24 to The negative pressure in the secondary pipe 12 and the vacuum pipe 14 is maintained at a pressure below a certain level.

  Normally, the primary side pipe 11 is filled with water up to the pre-actuating valve 22, and the secondary side pipe 12 and the vacuum pipe 14 are not filled with water.

  When a fire occurs in the protection zone 1, the fire detector 3 that detects the fire sends a fire alarm signal to the fire receiver 4, and the fire receiver 4 that receives the fire alarm signal receives a predetermined fire judgment algorithm. A fire signal is sent to the fire extinguishing system control panel 5 when it is determined that a fire has occurred.

  Thereafter, when the conshield part 2a of the sprinkler head 2 falls due to the heat of the fire, the conshield part fall detection switch 2b sends a conshield part fall signal, and the fire extinguishing system control panel 5 passes through the repeater 51 and the sprinkler head 2 The fall of the conshield part 2a is detected.

  When both the fire signal and the conshielded part fall signal are detected, the first control means provided in the fire extinguishing system control panel 5 performs control for discharging water. That is, by opening the remote start valve 22b, the pre-actuating valve 22 is opened, and fire extinguishing water is supplied (charged) to the secondary side pipe 12.

  After the pre-actuating valve 22 is opened, the pressure in the primary side pipe 11 is reduced accordingly. The fire detection pump control panel 6 which has detected the pressure drop by a pressure detection means (not shown) and has received a pressure drop signal from the pressure detection means starts the pressurized water supply device 21 and supplies the water for fire fighting toward the secondary side pipe 12. Pump. When the pre-actuating valve 22 is opened and the fire-extinguishing water flows to the secondary side pipe 12, the running-water signal switch 22 a provided in the pre-acting valve 22 flows into the fire extinguishing system control panel 5 via the relay 51. Send a signal. The fire extinguishing system control panel 5 that has received this water flow signal displays that the water is being discharged.

  When the pre-actuating valve 22 is opened, the second control means of the fire extinguishing system control panel 5 performs control so that the on-off valve 31 is closed. When the on-off valve 31 is replaced with an electric on-off valve and the above-described check valve is used, the on-off valve 31 is autonomously closed by the pressure in the secondary side pipe 12. In this case, the fire extinguishing system control panel 5 does not need the second control means.

  In this way, when the pre-actuating valve 22 is opened and the water for fire extinguishing is pumped to the secondary side pipe 12 by the pressurized water supply device 21, the vacuum pipe 14 interposed between the secondary side pipe 12 and the vacuum pump 24 is It is closed by the on-off valve 31. Therefore, fire-extinguishing water does not flow from the secondary side pipe 12 into the vacuum pump 24 via the vacuum pipe 14. This prevents the vacuum pump 24 from sucking water and becoming overloaded, and prevents the vacuum pump 24 from being broken or damaged.

  At this time, since the vacuum pipe 14 is closed, when the vacuum pump 24 is operated, the operation is closed, and the vacuum pump 24 and the vacuum pipe 14 may be loaded and damaged.

  Therefore, when the on-off valve 31 is closed, the third control means provided in the fire extinguishing system control panel 5 sends an operation stop signal of the vacuum pump 24 to the vacuum pump control panel 52. That is, the operation of the vacuum pump 24 is stopped when the fire signal from the fire receiver 4 and the operation of the conshield part drop detection switch 2a are detected, and the vacuum pump 24 is prevented from being closed.

  The vacuum pump control panel 52 may autonomously stop and control the fire extinguishing pump 24 without depending on the signal from the fire extinguishing system control panel 5. That is, the operation of the vacuum pump 24 is controlled via the vacuum pump control panel 52 so that the vacuum switch 53 does not become a predetermined pressure or less. In that case, the third control means is unnecessary.

  When the pre-actuating valve 22 is opened, it is sucked in from the secondary side pipe 12 which is in a negative pressure, the fire-fighting water having a flow rate exceeding the rating flows into the pressurized water supply device 21, water hammer is generated, There is a risk of damage. Therefore, a flow rate control means 23 is provided on the primary side or the secondary side of the pre-actuating valve 22 so as to restrict the passage flow rate at the time of fire.

  As this flow control means 23, a constant flow valve and an orifice are used. Since the flow rate control means 23 does not cause an excessive flow rate due to the negative pressure in the secondary side pipe 12, the water discharge flow rate at the time of fire can be limited to a predetermined value to prevent the occurrence of water hammer.

  Fire extinguishing water pumped through the secondary side pipe 12 reaches the sprinkler head 2 via the falling pipe 13. Thereafter, the thermal decomposition mechanism of the sprinkler head 2 is actuated and dropped by the heat of the fire, and the valve body supported by the thermal decomposition mechanism loses its support. At this time, since the secondary side pipe 12 is pressurized by the water for fire extinguishing sent from the pressurized water supply device 21, the valve body falls so as to be pushed out, and the water outlet in the sprinkler head 2 is surely opened. Plug. Then, the sprinkler head 2 that has been opened is discharged to the protection section 1 at a specified discharge pressure, and the fire that has occurred in the protection section 1 is extinguished.

  As described above, the sprinkler fire extinguishing equipment of the present embodiment does not discharge water until all of the following conditions are met. That is, fire detection of the fire detector 3, fire judgment of the fire receiver 4, fall of the conshield part 2a of the sprinkler head 2 due to the heat of the fire, operation of the thermal decomposition mechanism of the sprinkler head 2 due to the heat of the fire. .

  Therefore, even if the fire detector 3 malfunctions, the conshield portion 2a falls off, or the sprinkler head 2 is damaged, water damage does not occur.

  By the way, the control conditions of the first to third control means both detect the operation of the fire detector 3 judged to be a fire and the conshield drop from the sprinkler head 2 through the fire judgment algorithm of the fire receiver 4. Was to do.

  However, statutory periodic inspection is imposed on the automatic fire alarm system, and in such a case, a fire signal at the time of inspection cannot be sent to the fire extinguishing system control panel 5. This is because there is no actual fire. In such a case, the fire receiver 4 performs an operation of interrupting the fire signal to the fire extinguishing system control panel 5. There may be situations where the automatic fire alarm system does not function temporarily due to renovation work.

  At this time, if a fire actually occurs, the sprinkler fire extinguishing equipment will not operate because the control condition is not satisfied, but this is a problem.

  Therefore, it is assumed that the sprinkler fire extinguishing equipment can automatically extinguish even when the fire extinguishing system control panel 5 is set to the single mode and the automatic fire alarm equipment does not function. That is, even if there is no fire signal from the fire receiver 4, it can be controlled from the first to third control means only by the conshielded part falling signal.

If the conshield part 2a malfunctions in this single mode, fire-extinguishing water is pumped to the secondary side pipe 12, the on-off valve 31 is closed, and the vacuum pump 24 is stopped. However, as long as the sprinkler head 2 does not operate, the water is discharged. It will never be done. Therefore, it is possible not to impair the minimum function required as an automatic fire extinguishing facility.
[Embodiment 2]
A sprinkler fire extinguishing facility according to Embodiment 2 of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
<Configuration of sprinkler fire extinguishing equipment>
First, the configuration of the second embodiment will be described.

  The most different point of the sprinkler fire extinguishing equipment of the present embodiment from the first embodiment is that it is a wet negative pressure pre-acting sprinkler fire extinguishing equipment that fills the secondary side pipe 120 at normal times and uses negative pressure water. It is in. In response to this, the pre-acting valve 220 that is filled with the secondary side, the flow signal switch 220a that is provided in the pre-acting valve 220, the remote start valve 220b that is the pilot valve of the pre-acting valve 220, and the standing water that is normally filled. The down piping 130 and the repeater 510 are different from the first embodiment.

  Further, in order to make the secondary side pipe 120 to be filled with a negative pressure, the vacuum pipe 14 is connected to a rising branch pipe that communicates with the secondary side pipe 120 and projects upward. This is to prevent water in the secondary side pipe 120 from being sucked into the vacuum pipe 14 due to a drop in the rising branch pipe.

  A water level detector 32 is provided at the upper end of the rising branch pipe, and is controlled so that the inside of the rising branch pipe has a predetermined water level or lower, that is, a negative pressure higher than a predetermined pressure. The water level detector 32 is electrically connected to the fire extinguishing system control panel 5 via the repeater 510. When the water level detector 32 is filled up to the height at which the detection electrode is located, the water level detector 32 sends a charge signal. When the water filling signal is received, the fire extinguishing system control panel 5 controls the vacuum pump 24 to stop via the vacuum pump control panel 52. As a result, the lower pressure limit (negative pressure upper limit) in the secondary side pipe 120 is determined.

  The vacuum switch 53 connected to the vacuum pipe 14 sends a signal when the pressure in the vacuum pipe 14 rises to a predetermined value. Upon receiving this signal, the vacuum pump control panel 52 starts the vacuum pump 24 and controls it so that it is below the upper limit of pressure in the vacuum pipe 14 (lower than the lower limit of negative pressure).

  A vacuum break valve 33 is provided in the vacuum pipe 14 so that the pressure in the vacuum pipe 14 does not become a predetermined value or less (a predetermined negative pressure or more).

  Since the configuration and operation unique to the wet negative pressure pre-actuated sprinkler fire extinguishing equipment such as the water level detector 32 and the vacuum breaker valve 33 are disclosed in Patent Document 3, detailed description thereof is omitted, but Patent Document 3 The description of is incorporated.

  Note that the secondary side pipe 120 is filled with water even at a negative pressure, and there is little possibility of causing a water hammer due to an excessive flow rate when the pre-actuating valve 220 is opened. The flow rate control means 23 is basically unnecessary.

Other configurations are the same as those in the first embodiment.
<Operation of sprinkler fire extinguishing equipment>
Hereinafter, the operation of the sprinkler fire extinguishing facility according to Embodiment 2 will be described.

  In this sprinkler fire extinguishing equipment, the secondary side pipe 120 is filled with water before the operation is started. During normal operation (monitoring state) after the start of operation, the secondary side pipe 120 is filled with water, and the vacuum pump 24 is activated so that the secondary side pipe 120 and the vacuum pipe 14 have a negative pressure lower than atmospheric pressure. This is a wet negative pressure pre-acting sprinkler fire extinguishing system.

  When the fire detector 3 issues a fire and the fire receiver 4 that has received the fire alert signal determines that the fire is detected by the fire determination algorithm, a fire signal is transmitted to the fire extinguishing system control panel 5.

  And when the fire signal from the fire receiver 4 and the conshield part fall signal from the conshield part fall detection switch 2b are received via the repeater 510, the first control means of the fire fighting system control panel 5 The pre-actuating valve 220 is opened. The second control means of the fire extinguishing system control panel 5 is provided in the vacuum pipe 14 that communicates with the secondary side pipe 120 and is interposed between the rising pipe protruding upward and the vacuum pump 24. The on-off valve 310 is closed. Further, the third control means of the fire extinguishing system control panel 5 stops the vacuum pump 24 via the vacuum pump control panel 52.

  After the pre-actuating valve 220 is opened, the pressurized water supply device 21 is started by the pressure drop of the primary side pipe 11 and the water for fire extinguishing is pumped toward the secondary side pipe 120 in the same manner as in the first embodiment. is there.

  And the water for fire extinguishing in the secondary side piping 120 is pressurized quickly, and the water outlet in the sprinkler head 2 activated by the heat of the fire is surely opened. Then, the sprinkler head 2 that has been opened is discharged to the protection section 1 at a specified discharge pressure, and the fire that has occurred in the protection section 1 is extinguished.

  The sprinkler fire extinguishing equipment of the present embodiment discharges water only after all the same conditions as in the first embodiment are met. Therefore, even if the fire detector 3 malfunctions, the conshield portion 2a falls off, or the sprinkler head 2 is damaged, water damage does not occur.

  The single mode is the same as in the first embodiment.

1 protective compartment, 2 sprinkler head,
2a conshield part, 2b conshield part fall detection switch,
3 Fire detector, 4 Fire receiver, 5 Fire extinguishing system control panel,
51 repeater, 52 vacuum pump control panel, 53 vacuum switch, 6 fire pump control panel, 10 fire fighting water tank, 11 primary side piping,
12, 120 Secondary piping, 13, 130 Falling piping,
14 vacuum piping, 16 drainage piping, 21 pressurized water supply device,
22, 220 Pre-actuated valve,
22a, 220a Flow water signal switch, 22b, 220b Remote start valve,
23 constant flow valve, 24 vacuum pump, 25 terminal test valve,
31 On-off valve, 32 Water level detector, 33 Vacuum break valve,

Claims (6)

A pre-actuating valve;
A secondary pipe provided on the secondary side of the pre-acting valve and connected to the sprinkler head;
Fire detection means for detecting a fire in a compartment protected by the sprinkler head;
A vacuum pump that is connected to the secondary side pipe and normally makes negative pressure in the secondary side pipe;
A pre-actuated sprinkler fire extinguishing system comprising:
The sprinkler head normally covers the main body of the sprinkler head, and in the event of a fire, a conshield portion that falls from the main body of the sprinkler head due to the heat of a fire, and a conshield portion drop that detects the fall of the conshield portion Detecting means,
A sprinkler fire extinguishing system comprising first control means for controlling the pre-actuating valve to be opened when both the fire detecting means and the conshielded part drop detecting means are activated. An on-off valve that electrically opens and closes a vacuum pipe interposed between the secondary side pipe and the vacuum pump;
2. The sprinkler fire extinguishing according to claim 1, further comprising: a second control unit that controls to close the on-off valve when both the fire detection unit and the conshielded unit drop detection unit are activated. Facility. In the vacuum piping interposed between the secondary side piping and the vacuum pump,
An urging means for urging and opening the valve body in the direction of the secondary side pipe against the suction force of the vacuum pump; and a predetermined water pressure from the secondary side pipe side when the pre-actuating valve is opened. The sprinkler fire extinguishing equipment according to claim 1, further comprising: a check valve that includes a valve body that closes when the pressure is applied.   4. The apparatus according to claim 1, further comprising a third control unit that controls to stop the operation of the vacuum pump when both the fire detection unit and the conshielded unit drop detection unit are activated. The sprinkler fire extinguishing equipment described in any one.   The first to third control means have a single mode in which the operation of the conshielded part drop detection means is controlled as a control condition, excluding the operation of the fire detection means from the control conditions. Sprinkler fire extinguishing equipment as described in any of the above.   6. The flow control means for limiting the discharge flow rate when the pre-actuation valve is open to a predetermined flow rate in the primary or secondary pipe of the pre-actuation valve. Sprinkler fire extinguishing equipment.