JP2007089854A - Fire fighting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide fire fighting equipment which immediately sprays an aqueous solution of a fire extinguishing agent from a head activated during a fire even if only water for fire fighting is filled at the normal time to minimize a delay in a fire fighting operation. <P>SOLUTION: The fire extinguishing agent 45 fed from a chemical agent tank 46 is mixed into the water for fire fighting supplied by pressurizing by a fire fighting pump 10 with a mixer during the fire, and the aqueous solution of the fire extinguishing agent is fed to the closed type head activated by the fire out of a plurality of closed heads 34 connected to a branched pipe 28 and is sprayed. An end control valve 42 is provided at the end of the branched pipe 28. A monitoring control panel 50 keeps the end control valve 42 in a closed state during the normal time, controls to keep the end control valve 42 in an open state for a prescribed period of time when receiving fire signals from a fire detector 44 without receiving signals of detecting the water flow from a water flow detecting device 32, and controls to restore the end control valve 42 to the closed state after discharging the water for fire fighting in the branched pipe 38 and replacing it with the aqueous solution of the fire extinguishing agent from the mixer 26. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a fire extinguishing facility that mixes a fire extinguishing agent supplied from a chemical tank with water for extinguishing pressure supplied by a fire extinguishing pump and sprays an aqueous solution of the extinguishing agent from a head in the event of a fire.

  Conventionally, a pre-acting fire extinguishing facility is known as a closed spray fire extinguishing facility that emits an extinguishing agent aqueous solution in which a fire extinguishing agent is mixed with water for fire extinguishing (Patent Document 1). In this conventional fire extinguishing equipment, the pipe from the pump is connected to the primary side of the pre-actuated water flow detection device through a mixer that mixes the aerated foam fire extinguisher from the fire extinguisher tank. A closed head is connected to the pipe, and a fire detector is installed in the radiation section of the closed head.

  In such a fire extinguisher, if the pipe is filled with a fire extinguisher aqueous solution for a long period of time, the pipe equipment may be adversely affected. May be reduced.

  Therefore, at the start of use of the fire extinguishing equipment, the running water detection device is opened, the pump is operated with the on-off valve provided in the extinguishing agent supply pipe of the extinguishing agent tank closed, and the secondary side piping of the running water detection device is extinguished. Fill with water only. When the secondary side pipe is filled with fire-extinguishing water, the running water detection device is closed, and the open / close valve of the fire-extinguishing agent supply pipe is opened so that the fire-extinguishing agent can be supplied to the mixer.

When a fire occurs, the control panel sends a signal to the water flow detector to open the valve and starts the pump by a fire signal from the fire detector. In this state, when the closed head detects a fire, the control panel opens. By the above, water is sprayed from the spray head in which the fire extinguisher aqueous solution in which the fire extinguisher is mixed with the fire extinguishing water is operated.
JP 2002-291931 A JP 2001-238777 A

  However, in such a conventional fire extinguishing equipment, since the pipe is normally filled with only water for fire extinguishing, when the closed head is activated due to a fire, first the secondary of the mixer If the sprinkling of the fire-fighting water filling the piping on the side is not completed, it will not be switched to the sprinkling of the extinguishing agent aqueous solution from the mixer, and it will take time until the sprinkling of the extinguishing agent aqueous solution with high extinguishing effect starts after the head is activated. There is a delay. In particular, when the piping distance from the mixer to the head is increased, there is a problem that the time delay from when the head is operated until the aqueous fire extinguishing agent is sprayed becomes considerably large.

In the present invention, the fire extinguisher aqueous solution is normally charged only with water for extinguishing the fire, and the fire extinguishing agent aqueous solution is prevented from being adversely affected. The purpose is to provide equipment.

In order to achieve this object, the present invention is configured as follows. In the present invention, in the event of a fire, the fire extinguishing agent supplied from the chemical tank is mixed with the fire extinguishing water pressurized supplied by the fire extinguishing pump with a mixer, and the fire extinguisher aqueous solution is supplied to the head connected to the branch pipe to spray water. In fire extinguishing equipment,
A fire detector that detects a fire in the section where the head is installed and outputs a fire signal;
A flowing water detection device that is provided in the branch pipe and detects the flowing water in the branch pipe and outputs a flowing water detection signal;
A pump control unit that activates the fire-extinguishing pump by detecting that the pressure of the primary-side piping of the flowing water detection device has fallen below a predetermined value;
A control valve provided in the branch pipe and controlling the branch pipe to be connected to or disconnected from the drain pipe;
During normal operation, the control valve is kept disconnected from the drain pipe. When a fire detection signal is obtained without a flow detection signal, the control valve is connected to the drain pipe for a predetermined time, and then branched. A control unit that drains the fire-extinguishing water in the pipe and replaces it with an extinguishing agent aqueous solution from the mixer, and then restores the drain pipe to a disconnected state; and
It is provided with.

  Here, the control valve is provided at the end of the branch pipe. Further, the control valve may be provided on the side of the water flow detection device upstream of the branch pipe head.

  Furthermore, in the fire extinguishing equipment according to the present invention, the control unit controls the control valve to be connected to the drain pipe for a predetermined time when the running water detection signal is obtained without obtaining the fire signal, and is activated by the fire. In addition to sprinkling with a closed head, the fire extinguishing water in the branch pipe is drained and replaced with a fire extinguisher aqueous solution from the mixer.

  The head is a closed type head integrally provided with a thermal head, or one or a plurality of open type heads connected to a secondary pipe of a simultaneous open valve provided with a fire detection head.

  The fire extinguishing equipment of the present invention is provided in the branch pipe integrally or in series with the running water detection device, and is provided with a control valve that is controlled to be in an open state or a closed state. If a fire signal is not obtained when a running water detection signal is obtained, control is made to a closed state, and then control is made to an open state when a fire signal is obtained.

The fire extinguishing equipment of the present invention is provided in a branch pipe integrally or in series with a running water detection device, and is provided with a control valve that is controlled to be in an open state or a closed state. Then, when a fire signal is obtained, it is controlled to open.

  According to the present invention, since only the fire-extinguishing water is filled in the pipe at normal time, the fire extinguishing agent does not adversely affect the branch pipe or the water supply main pipe. Is obtained, the control valve provided at the end of the branch pipe in the fire compartment or in the middle is connected to the drain pipe, and the fire-fighting water in the pipe is flowed to the drain pipe side, and this fire-fighting water is drained. Accordingly, a fire extinguisher aqueous solution is allowed to flow from the mixer to the secondary pipe, and after a predetermined time sufficient for the fire extinguisher aqueous solution to fill the branch pipe of the fire compartment, the control valve is restored to a state in which it is disconnected from the drain pipe.

  For this reason, if the head is in a sprinkled state after receiving a hot air current due to a fire, the branch pipe is replaced with a fire extinguisher aqueous solution at this stage. The fire can be quickly and reliably extinguished without causing a fire delay.

  In addition, even if the head is operated in response to a hot fire air flow while controlling the control valve to be connected to the drain pipe, the secondary pipe of the mixer is extinguished from the control valve until then. The fire extinguisher aqueous solution has been replaced up to the pipe position where the water can be drained, the fire extinguishing water piping remaining between the heads is shortened, and the fire extinguisher aqueous solution is sprinkled with a short delay time. Fire extinguishing delay can be reduced as much as possible.

Furthermore, even when the head is first activated due to a fire and watering is started, the activated head is controlled by controlling the drainage state for a predetermined time by the control valve based on the flowing water detection signal from the flowing water detection device accompanying the head operation. The fire-extinguishing water is drained through the control valve at the same time as the water sprinkling from the water, creating a flow of fire-extinguishing water equivalent to the operation of approximately two heads, and the time until water is sprayed from the working head of the fire extinguishing agent aqueous solution from the mixer Can be shortened as much as possible.

  FIG. 1 is an explanatory view showing an embodiment of a fire extinguishing facility according to the present invention. In FIG. 1, in the fire extinguishing equipment of the present invention, a fire extinguishing pump 10 is installed in a basement or the like, a motor 12 is connected to the fire extinguishing pump 10, and the motor 12 can be started and stopped by a pump control panel 14.

  The fire-extinguishing pump 10 is in an operation state in which the motor 12 starts the pump, sucks fire-extinguishing water from the water source water tank 16 and pressurizes and supplies it to the water supply main pipe 18. The main water supply pipe 18 is raised in the height direction of the building via a mixer 26, and an elevated water tank installed on the rooftop or the like is connected to the upper part of the water supply main pipe 18, and the pressure in the pipe is increased by water from the elevated water tank. Is maintained at the specified pressure.

  A branch pipe 28 is drawn from a water supply main pipe 18 on the secondary side of the mixer 26 to a fire extinguishing target section such as a parking lot. A control valve 30 using an electric valve or the like and a flowing water detection device 32 are provided at a branch portion of the branch pipe 28. In this embodiment, the control valve 30 is controlled to be normally open. The flowing water detector 32 detects the flowing water in the branch pipe 28 and outputs a flowing water detection signal E1.

  A plurality of closed heads 34 are installed in the fire extinguishing target section from which the branch pipe 28 is drawn. The closed head 34 is integrally provided with a thermal head, and when the thermal head is actuated by receiving a thermal air current due to a fire, the valve mechanism is actuated to open, and water for extinguishing fire filled in the branch pipe 28 is sprinkled.

  Following the closed type head 34, a simultaneous open valve 36, a thermal head 38, and an open type head 40 are provided on the end side. The simultaneous opening valve 36 has a primary side connected to the branch pipe 28 and an open type head 40 connected to the secondary side. The simultaneous opening valve 36 has a built-in valve mechanism, and this valve mechanism is switched to the closed state by introduction of the primary pressure water due to the non-operating state of the thermal head 38. When the pressure water is released by operating 38, it operates in an open state, and fire-extinguishing water is sprinkled from the open head 40.

  A terminal control valve 42 is provided at the end of the branch pipe 28. The end control valve 42 is a valve that is controlled to an open state and a closed state by an external control signal, and when controlled to the open state, the same amount of water as when the closed head 34 is operated flows to the drain pipe side. I have to. A terminal test valve 43 that is opened and closed by manual operation is provided in parallel with the terminal control valve 42. However, the test water discharge by the terminal test valve 43 can be replaced by remote opening and closing of the terminal control valve 42.

  A fire detector 44 is installed in the fire extinguishing target section and outputs a fire signal E2 when a fire is detected.

  A chemical tank 46 filled with a fire extinguishing agent 45 is provided for the mixer 26 provided in the water supply main pipe 18. The chemical tank 46 is a metal pressure tank, and a partition wall such as a diaphragm is provided inside. The pressure water for extinguishing water from the water supply main pipe 18 is introduced from above, and the fire extinguishing agent 45 filled is pressurized. ing.

  A medicine supply pipe is connected to the mixer 26 from the medicine tank 46, and a medicine tank original valve 48 is provided in the middle of the medicine supply pipe. The chemical tank main valve 48 is, for example, an electric valve or an electromagnetic valve that is controlled to be in an open state and a closed state by a control signal from the outside.

  The monitoring control panel 50 includes a control unit that performs monitoring control of the fire extinguishing equipment, and this control unit is realized by a program control function such as a microcomputer. The control panel 50 has a control function for controlling the end control valve 42.

  Control of the end control valve 42 is normally performed by maintaining the end control valve 42 in a closed state, and the flowing water detection signal E1 cannot be obtained from the flowing water detection device 32 at the time of a fire, and the fire detector 44 installed in the fire extinguishing target section. When the fire signal E2 is obtained, the end control valve 42 is controlled to be in an open state for a predetermined time, thereby draining the fire-extinguishing water in the water supply main pipe 18 and the branch pipe 28 from the mixer 26. After replacing with a fire extinguisher solution, return to the closed state.

  The time during which the end control valve 42 is controlled to be opened by the control function of the monitoring control panel 50 is the pipe volume from the secondary side of the mixer 26 provided in the water supply main pipe 18 to the end of the branch pipe 28, that is, The amount of water for fire extinguishing filled in the pipe is set as a time sufficient for drainage by opening control of the end control valve 42.

  For this reason, it is desirable that the time for controlling the opening of the end control valve 42 is a time corresponding to the piping distance from the mixer 26 to the end control valve 42, but it is complicated to set for each branch pipe. A time corresponding to the maximum piping distance to the end control valve 42 may be set.

  In the case of the fire extinguisher shown in FIG. 1, when the operation of the equipment is started or when it is restored after a fire extinguishes, all the aqueous fire extinguisher solution is discharged from the water supply main pipe 18 and the branch pipe 28. Only water for fire extinguishing is charged.

  In this way, in order to fill the water supply main pipe 18 and the branch pipe 28 with water for fire extinguishing, the medicine tank main valve 48 is closed by the operation instruction from the monitoring control panel 50, and the end control valve 42 is opened. Fire extinguishing pump 10 is operated, fire extinguishing water is flowed from water supply main pipe 18 to branch pipe 28, and further to the water distribution pipe, and after end control valve 42 is controlled to be closed in a state where fire extinguishing water is completely filled, fire extinguishing pump 10 operation is stopped.

  Further, in the monitoring control panel 50 of the embodiment of FIG. 1, the control valve 30 provided in the branch pipe 28 is normally open at the normal time. The control process of the fire extinguishing equipment with the control valve 30 normally open is a fire when, for example, one of the closed heads 34 is activated by the fire to spray water for fire extinguishing, and the water flow detection device 32 outputs the water flow detection signal E1. It is checked whether or not the fire signal E2 is obtained from the sensor 44. If the fire signal E2 is not obtained, there is a possibility of non-fire, so the control valve 30 is controlled to be closed. When the fire signal E2 is obtained while the control valve 30 is controlled to be in the closed state, the control valve 30 is controlled to be in the open state again, and watering from the operated closed head 34 is resumed.

  The monitoring control panel 50 normally keeps the chemical tank main valve 48 open, and closes the chemical tank main valve 48 when replacing the water supply main pipe 18 and the branch pipe 28 with water for fire extinguishing during the recovery process. To control.

  FIG. 2 is a flowchart of the control processing of the fire extinguishing equipment of the present invention by the monitoring control panel 50 of FIG. In FIG. 2, the monitoring control panel 50 first closes the end control valve 42 as an initial setting in step S1, opens the control valve 30, opens the drug tank original valve 48, and starts the operation before starting the facility operation. The water supply main pipe 18 and the branch pipe 28 are filled with fire-extinguishing water by operation.

  In the normal monitoring state, whether or not the water flow detection signal E1 from the water flow detection device 32 is obtained in step S2, and if not, the fire signal E2 from the fire detector 44 is obtained in step S3. Whether it is monitored.

  If a fire signal E2 is first obtained from the fire detector 44 due to a fire, this fire signal E2 is determined in step S3, and the end control valve 42 is controlled to open in step S4. Subsequently, in step S5, a timer is started, and in step S6, the preset time set in advance is monitored.

  When the set time of the timer elapses and the time is up, the process proceeds to step S7, and the end control valve 42 is closed. Thus, the end control valve in which the water supply main pipe 18 and the branch pipe 28 are filled is opened by the open control of the end control valve 42 for a certain time when the fire signal E2 is first obtained. 42 to the drain.

  A pressure drop detection signal E5 is output when the pressure in the water supply main pipe 18 decreases with the drainage of the branch officer 28 and the pressure switch 22 provided in the pressure tank 20 drops below a specified pressure, and the pump control panel 14 The fire extinguishing pump 10 is started by driving the motor 12, and pressurized fire extinguishing water from the fire extinguishing pump 10 is made to flow through the mixer 26 to the branch pipe 28 where the end control valve 42 is open.

  When the fire-extinguishing water from the fire-extinguishing pump 10 flows through the mixer 26, the fire-extinguishing agent 45 is mixed from the medicine tank 46 through the medicine tank main valve 48 in an open state, and the fire-extinguishing agent aqueous solution is branched from the mixer 26. 28. For this reason, when a predetermined time by the timer setting elapses, all the fire extinguishing water up to the end of the branch pipe 28 on the secondary side of the mixer 26 is drained and replaced with the aqueous fire extinguisher solution from the mixer 26. Then, the end control valve 42 is controlled to be in a closed state, and in this state, the sprinkling from the open type head 40 due to the operation of the closed type head 34 or the simultaneous open valve 36 is awaited.

  After closing the end control valve 42 in step S7, when one of the closed heads 34 is actuated in response to a thermal air current due to a fire, for example, the branch pipe 28 is filled with water from the actuated closed head 34 at this time. Extinguishing water solution is released. Flowing water accompanying the discharge of the aqueous solution of fire extinguishing agent is detected and a flowing water detection signal E1 is output by the flowing water detection device 32. The flowing water detection signal E1 is determined in step S8, and the process proceeds to step S15 to enter a fire extinguishing standby state.

  When the fire extinguishing is confirmed, the process proceeds to step S16, the medicine tank main valve 48 is closed to stop the supply of the fire extinguishing agent 45, and the open / close valve 30 is closed in step S17 to operate the closed type head. Stop watering from.

  On the other hand, in the monitoring state in which the detection of running water is checked in step S2 and then the process of checking the fire signal in step S3 is repeated, for example, the closed head 34 is actuated first by the fire and the running water detection device 32 detects When the signal E1 is obtained, the running water detection signal is determined in step S2, and the process proceeds to step S9 to check whether or not the fire signal E1 is present.

  If the fire signal E1 is obtained at this time, the process proceeds to the fire extinguishing waiting process in step S15 while the control valve 30 is kept open. On the other hand, if the fire signal E1 is not obtained in step S9, there is a possibility that an object has hit the closed head 34 and malfunctioned. Therefore, the process proceeds to step S10 and the control valve 30 is closed. In step S11, the chemical tank main valve 48 is also controlled to be closed in order to prevent the fire extinguishing agent 45 from flowing unnecessarily to the water supply main pipe 18 side. Stop.

  In this state, the presence or absence of the fire signal E1 is checked in step S12. If the fire signal is obtained, the chemical tank main valve 48 is opened again in step S13, and the control valve 30 is opened again in step S14. Resume fire water.

  FIG. 3 is a flowchart of the restoration process in the fire extinguishing equipment of the present invention by the monitoring control panel 50 of FIG. The flowchart of the restoration process is a procedure of the restoration process at the start of use of the equipment and after the extinguishing of fire due to a fire.

  In FIG. 3, in the recovery process, the medicine tank main valve 48 is controlled to be closed in step S1, and then the control valve 30 is controlled to be opened in step S2, and further, the end control valve 42 is controlled to be opened in step S3. . In this state, the fire pump 10 is operated by the pump control panel 14, and a timer is started in step S4.

  In the restoration process, since the extinguishing agent aqueous solution is filled between the secondary side of the mixer 26 and the end of the branch pipe 28, the extinguishing agent aqueous solution charged as the timer setting time is at the end. When a sufficient time is set for the water to be discharged through the control valve 42 and replaced with fire-extinguishing water, and the time-up is determined in step S5, the end control valve 42 is controlled to be closed, thereby the branch pipe 28 and the water supply main pipe. The inside of the 18 pipes is filled with water for fire extinguishing only.

  Finally, in step S7, the chemical tank original valve 48 is controlled to be in an open state, and a series of recovery processing is completed. In the state where the restoration processing is completed, the initial setting state in step S1 of the monitoring control in FIG. 2 is created.

  FIG. 4 is a flowchart of another embodiment of control processing in the fire extinguishing equipment of the present invention by the monitoring control panel 50 of FIG. In this embodiment, even when the water flow detection signal E1 from the water flow detection device 32 is obtained without obtaining the fire signal E2 from the fire detector 44, that is, the head receives the hot air flow due to the fire. When the operation starts and watering is started, the end control valve 42 is controlled to be open for a predetermined time, and almost two heads are operated in the branch pipe 28 by the activated head and the drainage from the end control valve 42. By creating an equivalent water flow and increasing the amount of water flow, the time for replacing the fire-extinguishing water between the secondary side of the mixer 26 and the end of the branch pipe 28 with an extinguishing agent aqueous solution was shortened. Features.

  In FIG. 4, the control processing of this embodiment is the initial setting state in step S1, that is, the end control valve 42 is closed, the control valve 32 is opened, the chemical tank original valve 48 is opened, and the water for fire extinguishing is filled. In step S2, the presence or absence of a running water detection signal is checked, and if there is no fire signal, the presence or absence of a fire signal is checked in step S3.

  The processing in steps S4 to S8 when a fire signal is first obtained due to a fire is the same as steps S3 to S8 in FIG. That is, when a fire signal is obtained for the first time, the end control valve 42 is opened for a certain period of time according to the timer setting, and the fire-extinguishing water is drained to replace the extinguisher aqueous solution from the mixer.

  On the other hand, when the flowing water detection signal accompanying the head operation is first obtained and discriminated in step S2, and then the fire signal is checked in step S9, the fire signal E2 is obtained at this time. In the second embodiment, the process proceeds to the fire extinguishing determination process in step S15. However, in the second embodiment in FIG. 4, the process proceeds to step S4 to open the terminal control valve 42 and start the timer in step S5. When the time-up is determined in step S6, the end control valve is closed in step S7, and the presence or absence of a flowing water detection signal is checked in step S8.

  That is, in the embodiment of FIG. 4, the fire water from the closed head 34 or the open head 40 is detected from the water flow detection signal E1 and the fire signal E2 is obtained. The end control valve 42 is controlled to be in an open state for a certain period of time by setting a timer, and in addition to watering from the activated head, the amount of water flowing to the branch pipe 28 is increased by draining through the end control valve 42. The time until the water spray from the operating head is replaced with the water spray from the mixer 26 is reduced.

  In the embodiment of FIG. 1, both the water supply main pipe 18 and the branch pipe 28 are filled with fire-extinguishing water. However, the water supply main pipe 18 is pre-filled with an extinguishing agent aqueous solution, and the branch pipe 28 is filled with fire-extinguishing water. The branch pipe may be replaced with an extinguishing agent aqueous solution by opening control of the end control valve 42 at the time of fire, and quick watering can be performed at the time of fire.

  FIG. 5 is an explanatory view showing another embodiment of the fire extinguishing equipment of the present invention. The fire extinguishing equipment of FIG. 5 is provided with a function as a control valve in which the electric valve 30 on the side of the flowing water detection device 32 drains the water for fire extinguishing and replaces the extinguishing agent aqueous solution instead of the end control valve 42 of FIG. . Further, a simultaneous opening valve 51 is provided in the secondary side branch pipe 28 of the flowing water detection device 32, and an open type head 52 is provided in the secondary side branch pipe of the simultaneous opening valve 51.

   The simultaneous release valve 51 has a sensing head 53. When the sensing head 53 is activated by receiving heat from a fire, the built-in valve opens to connect the primary side and the secondary side, and water is sprayed from the open type head 52. Is called. The motor-operated valve 30 is a three-way valve, and the added port is connected to the drain pipe. Normally, the primary side and the secondary side of the branch pipe 28 communicate with each other, and the valve is opened in the same manner as in FIG. This prevents adverse effects of the fire extinguishing agent on the water supply main pipe 18 and the branch pipe 28.

  When a fire signal is received and the water supply main pipe 18 and the branch pipe 28 are filled with a fire extinguisher aqueous solution and the sprinkling standby state is established, the motor-operated valve 30 is switched so that the primary side of the branch pipe 28 and the drain pipe communicate with each other. By doing so, the water for fire extinguishing on the primary side of the motor-operated valve 30 is drained and replaced with a fire extinguisher aqueous solution, and the motor-operated valve 30 is controlled to return to the normal state after a predetermined time has elapsed.

  The control flow of this embodiment is almost the same as that in FIG. 2 and the like, which is the difference in whether the control valve 30 is provided at the end of the branch pipe 28 or in the middle. In the embodiment of FIG. 5, the closed type head 34 is opened because the extinguishing agent aqueous solution is not replaced and filled up to the end of the branch pipe 28 and is replaced and filled up to the middle of the branch pipe 28 provided with the motor-operated valve 30. The fire extinguishing water is sprinkled a little at the beginning, but since the fire extinguishing water is replaced with the fire extinguishing agent aqueous solution up to the connection position of the motor-operated valve 30, the water extinguishing agent aqueous solution is sprinkled quickly.

  In particular, since the main water supply pipe 18 having a large pipe and a long distance has been completely switched to the fire extinguishing agent aqueous solution, the water extinguishing agent aqueous solution can be sprinkled more quickly than water spraying when all the conventional pipes are fire extinguishing water. .

  The electric valve 30 and the flowing water detection device 32 may be integrated, or may be provided at a position closer to the simultaneous opening valve 51 on the secondary side of the flowing water detection device 32. In addition, the control valve 30 performs both the sprinkling stop control at the time of head error movement and the fire water replacement control by a three-way valve, but even if a separate control valve is prepared and performed separately. good.

  Further, if there is no fire signal when the flowing water detection signal is received in step S9 in FIG. 1, the closed head 34 may malfunction, so that the control valve 30 is controlled to close in step S10. Although it waits for a fire signal, it may be a real fire, so that the water for extinguishing may be switched to the extinguishing agent aqueous solution by drainage control of the control valve 30 during this waiting period. Further, the configuration of the watering head of the embodiment of FIG. 5 may be the piping configuration of the closed head of FIG.

  In the above embodiment, the case where the control valve 30 provided in the branch pipe is normally opened is taken as an example. However, the control valve 30 may be normally closed. In the control process in which the control valve 30 is normally closed, when the fire signal E2 from the fire detector 44 is obtained, the control valve 30 is controlled to be in an open state, and the water is discharged due to the head operation due to the fire thereafter. It will be.

  Also in this case, the end control valve 42 is controlled to be opened simultaneously with the control of the open state of the control valve 30, and the fire extinguishing water is passed through the drain pipe to replace the fire extinguisher aqueous solution from the mixer 26. It will wait for head operation.

  In the embodiment of FIG. 1, the control valve 30 is provided separately from the flowing water detection device 32, but a valve structure in which the control valve 30 is provided integrally with the flowing water detection device 32 may be used.

  Further, in the embodiment of FIG. 1, the drug tank original valve 48 is normally open, but it may be normally closed. When the chemical tank main valve 48 is normally closed, when the end control valve 42 is opened and the water for fire extinguishing is discharged, the chemical tank main valve 48 can be opened at the same time to supply the fire extinguisher aqueous solution from the mixer 26. Control to Therefore, the fire extinguishing agent 45 is prevented from flowing unnecessarily to the water supply main 18 side during normal standby.

  Further, in the embodiment of FIG. 1, a case where the closed type head 34 and the open type head 40 are mixed in the branch pipe 28 is taken as an example, but the equipment of only the closed type head 34 or the equipment of only the open type head 40 is used. It is good.

  In the installation with only the open-type head 40, the simultaneous opening valve 36 is arranged on the secondary side of the flowing water detection device 32, a branch pipe is connected from the secondary side of the simultaneous opening valve 36, and a plurality of pipes are connected to the branch pipe. The open type head 40 is connected.

Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

Explanatory drawing which showed embodiment of the fire extinguishing equipment by this invention The flowchart of the control processing in the fire extinguishing equipment of this invention by the monitoring control panel of FIG. Flowchart of restoration processing in the fire extinguishing equipment of the present invention by the monitoring control panel of FIG. The flowchart of other embodiment of the control processing in the fire extinguishing equipment of this invention by the monitoring control panel of FIG. Explanatory drawing which showed other embodiment of the fire extinguishing equipment by this invention

Explanation of symbols

10: Fire pump 12: Motor 14: Pump control panel 16: Water source water tank 18: Water supply main 20: Pressure tank 22: Pressure switch 24: Expiratory water tank 26: Mixer 28: Branch pipe 30: Control valve 32: Flowing water detector 34: Closed type head 36: Simultaneous opening valve 38: Thermal head 40: Open type head 42: End control valve 44: Fire detector 45: Fire extinguishing agent 46: Chemical tank 48: Chemical tank main valve 50: Monitoring control panel

Claims (7)

In a fire extinguishing system, in the event of a fire, the fire extinguishing agent supplied from the chemical tank is mixed with the fire extinguishing water pressurized by the fire extinguishing pump, and the aqueous solution is supplied to the head connected to the branch pipe to spray water. And
A fire detector that detects a fire in the section where the head is installed and outputs a fire signal;
A flowing water detection device that is provided in the branch pipe and detects a flowing water in the branch pipe and outputs a flowing water detection signal;
A pump control unit that activates the fire pump by detecting that the pressure of the primary side pipe of the flowing water detection device has dropped below a predetermined value;
A control valve that is provided in the branch pipe and controls the branch pipe to be connected to or disconnected from the drain pipe;
Normally, the control valve is kept disconnected from the drain pipe, and when the water flow detection signal is not obtained and the fire signal is obtained, the control valve is connected to the drain pipe for a predetermined time. A control unit that controls and restores the drain pipe to a non-connected state after draining the fire-extinguishing water in the branch pipe and replacing it with the extinguishing agent aqueous solution from the mixer;
Fire extinguishing equipment characterized by comprising
2. The fire extinguishing equipment according to claim 1, wherein the control valve is provided at an end of the branch pipe.
2. The fire extinguishing equipment according to claim 1, wherein the control valve is provided on the side of the water flow detection device upstream of the branch pipe head.
2. The fire extinguishing equipment according to claim 1, wherein the control unit controls the control valve to be connected to a drain pipe for a predetermined time when the water flow detection signal is obtained without obtaining the fire signal. In addition to watering by a closed head activated by a fire, the fire extinguishing water in the branch pipe is drained and replaced with a fire extinguisher aqueous solution from the mixer, and then restored to a state where it is disconnected from the drain pipe. Fire extinguishing equipment.
2. The fire extinguishing equipment according to claim 1, wherein the head is one or a plurality of open types connected to a secondary pipe of a closed type head integrally provided with a thermal head or a simultaneous open valve provided with a fire detection head. Fire extinguishing equipment characterized by being a head.
In the fire extinguishing equipment according to claim 1, further comprising a control valve that is controlled in an open state or a closed state integrally or in series with the flowing water detection device,
The control unit controls the control valve to an open state at normal times, and controls to a closed state when a fire signal is not obtained when the flowing water detection signal is obtained, and then obtains the fire signal. Fire extinguishing equipment that is controlled to be open when it is fired.
In the fire extinguishing equipment according to claim 1, further comprising a control valve that is controlled in an open state or a closed state integrally or in series with the flowing water detection device,
The said control part controls the said control valve to a closed state normally, and when the said fire signal is obtained, it controls to an open state, The fire extinguishing equipment characterized by the above-mentioned.

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