JP2012055359A - Fire extinguishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide fire extinguishing equipment that requires no water tank for preparing air bubble-containing fire extinguishing water and keeps air bubbles in the water discharged from a head for a sufficient time to enhance fire extinguishing performance, while determining whether the air bubbles can be generated or not.SOLUTION: The fire extinguishing equipment is constituted so that inert gas is mixed with the pressurized fire extinguishing water from a fire extinguishing pump 10 at the time of a fire by a mixer 36, and the water mixed with the inert gas is sprinkled from the closed type head 30 connected to a branch pipe 26. A bubble generator 40 is provided between the mixer 36 and the closed type head 30 to produce air bubbles having a bubble diameter of 10 μm or below and the bubble-containing fire extinguishing water is sprinkled from the closed type head 30. A testing machine 90 measures the amount of gas contained in the bubble-containing fire extinguishing water produced by the bubble generator 40. The testing machine 90 samples the bubble-containing fire extinguishing water in a transparent sampling container 92 to be kept in a static state, to separate the same into gas and water to measure the amounts of them.

Description

The present invention relates to a fire extinguishing facility that fires water by spraying water for fire extinguishing containing fine gas bubbles from a head.

  2. Description of the Related Art Conventionally, there is known a fire extinguishing facility that pressurizes and supplies water for fire extinguishing including microbubbles to a secondary side pipe and sprinkles water from a head.

  In this fire extinguishing equipment, nitrogen gas and water are mixed at a high speed by a microbubble generator to generate microbubbles that are fine bubbles with a bubble diameter of more than 10 μm and up to several tens of μm. In the event of a fire, the water for extinguishing the water in the water tank is supplied to the fire extinguishing head connected to the secondary pipe of the water flow detector by a pump and discharged.

  Thus, by spraying water containing microbubbles filled with nitrogen gas from the head, the fire can be extinguished by the suffocation effect of nitrogen gas in addition to the cooling effect of water.

JP 2007-268186 A

  However, in the fire extinguishing equipment that sprinkles water containing microbubbles from the head, the fire extinguishing water in the water tank is operated to operate the circulation pump in order to prevent the microbubbles in the water tank from floating on the surface and disappearing. However, there is a problem that maintenance and management are time consuming and expensive.

  Further, the microbubbles formed in the water tank are not necessarily distributed uniformly in the water tank, and there is no guarantee that water containing the ideal microbubbles can be continuously sprinkled from the head.

The present invention eliminates the need for a water tank for preparing fire-fighting water containing bubbles, maintains a bubble after discharging water from the head for a sufficient period of time to enhance the fire-extinguishing performance, and can confirm the appropriateness of bubble generation. The purpose is to provide.

In the present invention, in the event of a fire, a predetermined gas is mixed with a water for fire extinguishing supplied by a fire pump with a mixer, water is sprayed from a head connected to a branch pipe, and between the mixer and the head, In a fire extinguishing facility provided with a bubble generator for generating bubbles having a bubble diameter of several tens of μm or less,
A test device for measuring the amount of gas contained in fire-fighting water containing bubbles generated by the bubble generator is provided.

  Here, the test apparatus collects the fire-extinguishing water containing the bubbles generated by the bubble generating apparatus, stabilizes the collected fire-extinguishing water, separates it into the inert gas and the fire-extinguishing water, and enables each amount to be measured.

Test equipment
A transparent collection container with a scale to measure the internal volume;
An inlet valve for introducing fire-fighting water that has passed through the valve generator into the collection container;
An outlet valve for discharging fire-fighting water from the collection container;
Is provided.

  The test device connects the inlet valve to the secondary drainage pipe of the terminal test valve provided at the end of the branch pipe through the three-way switching valve, and connects the secondary side of the outlet valve to the secondary side of the three-way switching valve. Connect to drain.

  The test apparatus may be fixedly installed in the middle of the secondary drainage pipe of the end test valve provided at the end of the branch pipe.

  The test apparatus may be a dissolved concentration meter that measures the dissolved concentration of fire-extinguishing water collected from the secondary drain pipe of the end test valve provided at the end of the branch pipe.

  When a bubble generator is provided for each falling pipe of the head, the bubble generator is also provided on the primary side of the branch pipe leading to the test apparatus. Further, the bubble generating device may be integrated into the head. Further, the bubble generator may be provided in the middle of the branch pipe in front of the head.

  A mixer is provided in the water supply main connected to the secondary side of the fire pump, and a bubble generator is provided in the water supply main on the secondary side of the mixer.

  The mixer is provided in the suction pipe connected to the primary side of the fire pump, and the bubble generator is provided in the secondary suction pipe of the mixer.

  A mixer is provided in the middle of the water supply main on the secondary side of the fire pump, and a stirring pump is provided on the water supply pipe on the secondary side of the mixer. A bypass pipe having a gate valve for bypassing the agitation pump is provided.

Bubble generator
A guide vane that forms a spiral water flow;
A cutter that generates a bubble having a bubble diameter of several tens of μm or less by shearing a spiral water flow formed by guide vanes;
Is provided.

  In the cutter of the bubble generating device, the projecting members standing from the inner peripheral wall of the main body toward the center are arranged in a spiral shape in the axial direction. Moreover, the cutter of a bubble generator may arrange | position a supporting member to the axial direction of a main body center, and may arrange | position a protrusion member on the outer periphery of a supporting member, and may arrange | position it spirally to an axial direction.

  The bubble generating device includes a turbine blade type nozzle arranged in the main body and formed on the outer periphery with turbine blades that generate vortex flow, and the vortex flow generated by the turbine blade type nozzle is vortex broken down by narrowing the head inflow path and several A bubble having a bubble diameter of 10 μm or less is generated.

  The bubble generating device includes a guide vane that is disposed in the main body and forms a spiral water flow, and generates a bubble having a bubble diameter of several tens of μm or less by vortex breaking the vortex generated by the guide vane by narrowing the inflow path. .

The bubble generator is arranged in the main body, and generates a bubble having a bubble diameter of several tens of μm or less by arranging a plurality of guide vanes that form spiral water flows in different directions.

  According to the fire-extinguishing equipment of the present invention, bubbles of several tens of μm or less are generated and sprinkled from the head by a bubble generating device that flows an inert gas such as nitrogen or carbon dioxide or an active gas such as oxygen or air. However, it is possible to check whether or not bubbles are properly contained in the fire-fighting water discharged from the head by collecting fire-fighting water with a test device, and guaranteeing water discharge containing bubbles of several tens of μm or less from the head. And the planned fire fighting performance can be obtained with certainty.

  The test apparatus can settle the collected fire-extinguishing water into gas and water, measure the amounts of both, and accurately determine the appropriateness of bubble generation from the ratio.

  In addition, by measuring using a dissolved concentration meter, the dissolved concentration of carbon dioxide gas or oxygen gas can be measured constant, and the suitability of bubble generation can be determined more accurately.

  Bubbles generated in the present invention can have a bubble diameter of 10 μm or less and are sufficiently small with respect to microbubbles having a bubble diameter exceeding 10 μm. Therefore, self-shrinkage due to the action of surface tension is stronger than microbubbles, and the shrinkage rate is high. Therefore, after discharging from the head, it can rapidly contract and maintain the characteristics as bubbles.

  Bubbles are generated by rubbing or shearing high-velocity water containing inert gas or active gas, and are negatively charged. On the other hand, combustibles and buildings are positively charged, so water containing discharged water actively reaches and adheres to the radiating surface such as the combustion surface and the inner wall of the building by electrostatic force. Combustion is suppressed by the inert gas contained in the water, and an equivalent fire extinguishing effect can be expected even with half the amount of water of a normal fire extinguishing facility.

  In addition, the active gas such as oxygen and air contained in the bubble reacts with the carbon monoxide generated by the fire on the radiation surface and changes to carbon dioxide. Further, in the protective space other than the radiation surface, oxygen slightly increases. The adverse effects on the human body can be suppressed.

  In addition, due to surface charging of nano-micro bubbles, electrostatic repulsion is applied after water is discharged from the head, and even nano-level bubbles can float in the air for 10 minutes or more.

  Moreover, the water containing the bubble that is discharged from the head and reaches the combustion field converts the thermal energy of the fire into energy that crushes the bubble, thereby suppressing an increase in temperature. At the same time, the combustion field is cooled by the water forming the bubble, and when the bubble contains an inert gas, a suffocation effect is obtained.

  Moreover, the part covered with the bubble has a heat blocking effect, and can secure an evacuation route and an evacuation time.

  Moreover, since the water in the bubble is discharged from the head, the total surface area due to the bubble is increased, and it is adsorbed and dropped by harmful molecules such as smoke, so that the view and breathing of the evacuating person can be ensured.

  In addition, since the bubbles disappear within a few hours after the water is discharged, it is possible to eliminate the need for cleaning after fire extinguishing even with the foam fire extinguishing equipment.

  Further, when inert gas bubbles are used, corrosion of the piping can be prevented by the inert gas accumulated in the piping.

Furthermore, the bubbles can be negatively charged to remove dirt in the pipe.

Explanatory drawing which showed embodiment of the fire-extinguishing equipment by this invention which provided the test device detachably Sectional drawing which showed embodiment of the bubble generator provided in FIG. AA sectional view of FIG. Sectional drawing which showed other embodiment of the bubble generator provided in FIG. Sectional drawing which showed other embodiment of the bubble generator provided in FIG. Sectional drawing which showed embodiment of the bubble generator provided in front of the test apparatus of FIG. Sectional drawing which showed other embodiment of the bubble generator provided in front of the test apparatus of FIG. Explanatory drawing which showed other embodiment of the fire-extinguishing equipment by this invention which fixedly installed the test apparatus. Explanatory drawing which showed other embodiment of the fire-extinguishing equipment by this invention which provided the dissolved concentration measuring apparatus as a test apparatus Explanatory drawing which showed other embodiment of the fire-extinguishing equipment by this invention which provides a bubble generator in a water supply main pipe or a branch pipe Explanatory drawing which showed other embodiment of the fire extinguishing equipment by this invention which provides a mixer and a bubble generator in a suction pipe Explanatory drawing which showed other embodiment of the fire-extinguishing equipment by this invention which provides a stirring pump following a fire-extinguishing pump

  FIG. 1 is an explanatory view showing an embodiment of a fire extinguishing facility according to the present invention, in which a bubble test apparatus is detachably provided. In FIG. 1, a fire pump 10 is installed in a pump room such as a basement floor of a building and is driven by a motor 12. The motor 12 is started and stopped by the pump control panel 14. The fire-extinguishing pump 10 is driven by a motor 12, sucks fire-extinguishing water from a water source tank 16 through a suction pipe 15, and supplies pressurized fire-extinguishing water to a water supply main pipe 18 arranged in the height direction of the building.

  An expiratory tank 20 is provided for the fire pump 10. A pressure tank 22 is provided for starting the fire pump 10. The pressure tank 22 is connected to the water supply main pipe 18 and introduces pressurized fire-extinguishing water in the pipe to compress the air inside. The pressure tank 22 is provided with a pressure switch 24. The pressure switch 24 detects that the pressure inside the water supply main pipe 18 has dropped below a specified pressure, and outputs a pressure drop detection signal to the pump control panel 14, thereby The motor 12 is driven to start the fire pump 10.

  A branch pipe 26 is drawn from the water supply main pipe 18 to a fire extinguishing target section, for example, each floor of a building. A flowing water detector 28 is provided at a branch portion of the branch pipe 26. When the flow detection device 28 flows in the branch pipe 26 due to water spray from the head, the flow opens the valve and outputs a flow detection signal to a control panel (not shown).

  A plurality of closed heads 30 are installed in the branch pipe 26 on the secondary side of the water flow detector 28. The closed head 30 is integrally provided with a thermal head and a valve mechanism for spraying water for fire extinguishing by operation of the thermal head. A terminal test valve 32 is provided on the terminal side of the branch pipe 26 and is connected to the drain pipe 35.

  In this embodiment in addition to such a fire extinguishing equipment, a mixer 36 is provided in the water supply main pipe 18 connected to the secondary side of the fire pump 10, and the gas generator 34 generates the mixer 36. An inert gas or an active gas is supplied and mixed with fire-fighting water.

The inert gas generated in the gas generator 34 is, for example, nitrogen gas, and may be CO ₂ gas or the like. As the gas generator 34, a gas cylinder can be used.

  The active gas generated by the gas generator 34 is, for example, oxygen gas, and may be air or the like. Further, an oxygen cylinder may be used instead of the gas generator 34.

  Further, in the present embodiment, the bubble generating device 40 is provided in the falling pipe portion of the closed head 30 connected to the branch pipe 26 on the secondary side of the flowing water detection device 28. The bubble generating device 40 collides the extinguishing water flowing when the closed head 30 is opened into a swirling flow and then collides with a projecting member that functions as a current cutter protruding inside, and the inert gas mixed in the extinguishing water By crushing into fine bubbles, bubbles having a bubble diameter of several tens of μm or less (preferably 10 μm or less) are generated, and water is sprinkled from the opened closed head 30.

  Further, in the present embodiment, the test device 90 is detachably provided to the drain pipe 35 connected to the secondary side of the end test valve 32. That is, a three-way switching valve 98 is provided in the drain pipe 35, a connection flange 104 is provided on the switching port a side via the inlet valve 100, and an outlet valve 102 branched and connected to the drain pipe 35 on the switching port b side. The connection flange 106 is provided, and the test device 90 is detachably attached to the connection flanges 104 and 106.

  The test apparatus 90 includes a transparent collection tank 92, and the collection tank 92 is provided with a scale 94. Gate valves 95 and 96 are provided at the inlet and outlet piping of the collection tank 92.

  A bubble generator 60 is provided in the branch pipe 26 on the primary side of the end test valve 32 corresponding to the test apparatus 90 provided on the drain pipe 35 side. In the present embodiment, since the bubble generating device 40 is provided in the downcomer of the closed head 30, the fire-extinguishing water containing the bubbles generated by the bubble generating device 40 is tested on the secondary side of the end test valve 34. Since it does not flow through the apparatus 90, a dedicated bubble generator 60 is provided corresponding to the test apparatus 90.

  FIG. 2 is an explanatory view showing an embodiment of the bubble generator provided in FIG. In FIG. 2, the bubble generating device 40 is disposed between the falling pipe 46 from the branch pipe 26 and the closed head 30. The bubble generator 40 arranges a guide vane 42 on the primary side of a main body 41 that is a cylindrical pipe, and converts fire-fighting water mixed with an inert gas into a swirling water flow.

  Following the guide vane 42, a plurality of current cutters 44, which are projecting members having a mushroom-like head, are arranged on the inner peripheral surface of the main body 41 in a spiral shape along the axial direction, and are converted by the guide vane 42. The swirling flow collides with the current cutter 44 to break up bubbles of the inert gas, and by repeating this continuously, fine bubbles of 10 μm or less are generated.

  FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and the current cutters 44 are arranged on the inner peripheral surface of the main body 41 in a spiral shape at intervals of 90 degrees as viewed from the end surface. In addition, the arrangement angle of the current cutter 44 may be an interval of 45 degrees as indicated by a broken line in addition to 90 degrees, or may be a finer angle interval.

  FIG. 4 is an explanatory view showing another embodiment of the bubble generating device used in the embodiment of FIG. 1. In this embodiment, the function of the bubble generating device is integrated with the closed head. Features.

  In FIG. 4, the closed head 30 is integrally formed with a pipe connection portion 50 provided with a pipe connection screw 52 on the primary side which is the upper portion of the body 48. A valve mechanism including a deflector 56 and a heat-sensitive operation unit 54 are provided on the lower side of the body 48, and when a hot air current due to a fire is received, an easily soluble substance that fixes the heat-sensitive operation unit 54 melts, and the lower side of the deflector 56. The valve mechanism is decomposed and dropped to open the flow path, and the deflector 56 descends downward to scatter the discharged water for fire extinguishing.

  In the internal flow path of the pipe connection part 50, a bubble generating part 58 is configured by arranging a guide vane 42 on the primary side and subsequently arranging a plurality of current cutters 44 in a spiral shape along the axial direction. Yes.

  The bubble generating unit 58 converts the fire-fighting water flowing when the closed head 30 is opened into a swirl flow by the guide vane 42 and then collides with the current cutter 44 to crush the bubbles of the inert gas, and repeats this continuously. Generates fine bubbles of 10 μm or less.

  By integrating the structure as a bubble generating device into the closed head 30 as described above, the pipe connection work for the plumbing of the branch pipe can be simplified, and the installation space can be made compact. Note that the bubble generator 58 does not necessarily have the current cutter 44. After the swirl flow is caused by the guide vane 42, the discharge port provided in the upper portion of the deflector 56 is formed with a diameter of the guide vane 44 as shown in FIG. Finer bubbles can also be formed by narrowing down.

FIG. 5 is a cross-sectional view showing another embodiment of the bubble generator 40 used in the fire extinguishing equipment of FIG. In FIG. 5, the bubble generator 40 has a turbine blade nozzle 80 disposed inside a main body 41 that is a cylindrical pipe. The turbine blade type nozzle 80 has a plurality of turbine blades 84 extending in the direction of the outer peripheral axis of a nozzle body 82 having a conical shape on the inflow side.
The main body 41 connects the upper screw portion 41a to the down tube 46 as shown in FIG. 2, and connects the closed head 30 to the lower screw hole 41b as shown in FIG.

  The operation of the bubble generator 40 in FIG. 5 is such that when fire-extinguishing water mixed with inert gas is fed from the inlet of the main body 41 having the threaded portion 41 a, the fire-extinguishing water is formed on the outer periphery of the turbine blade nozzle 80. When the turbine blade 84 is converted into a vortex 86 rotating at a high speed and flows into the closed head 30 connected to the lower screw hole 41b, the vortex 86 is squeezed in the head inflow path to cause vortex breakage. Bubbles that become fine bubbles of 10 μm or less are generated.

  FIG. 6 is a cross-sectional view showing an embodiment of a bubble generator 60 provided corresponding to the test apparatus 90 of FIG. In FIG. 6, the bubble generating device 60 is provided with a primary side flange 62 and a secondary side flange 64 at both ends of a main body 61 which is a cylindrical pipe, and can be connected to the middle of the pipe.

  A guide vane 42 is disposed on the inner primary side of the main body 61 to convert the fire-fighting water mixed with an inert gas into a swirling water flow. Following the guide vane 42, a plurality of current cutters 44, which are projection members having a mushroom-like head, are arranged in a spiral shape along the axial direction on the inner peripheral surface of the main body 41, and are converted by the guide vane 42. The swirling flow collides with the current cutter 44 to break up bubbles of the inert gas, and by repeating this continuously, fine bubbles of 10 μm or less are generated.

  In addition, the bubble generator 60 can also apply a turbine type configuration as shown in FIG.

  FIG. 7 is a cross-sectional view showing another embodiment of the bubble generator 60 provided corresponding to the test apparatus 90 of FIG. In FIG. 7, the bubble generating device 60 is provided with a primary side flange 62 and a secondary side flange 64 at both ends of a main body 61 which is a cylindrical pipe, and can be connected in the middle of the pipe.

  A guide vane 42 is disposed on the inner primary side of the main body 61 to convert the fire-fighting water mixed with an inert gas into a swirling water flow. Subsequent to the guide vanes 42, support members 68 having both ends conical in the central axis direction in the main body 61 are arranged by the support fins 70.

  In the axial direction of the outer periphery of the support member 68, a plurality of current cutters 44, which are spiral projection members having a mushroom-shaped head, are arranged, and the swirl flow converted by the guide vanes 42 is caused to collide with the current cutter 44. Then, the bubbles of the inert gas are crushed, and this is continuously repeated to generate fine bubbles of 10 μm or less.

  Next, the operation of the fire extinguishing equipment of FIG. 1 will be described by taking as an example a case where an inert gas is generated and mixed by the gas generator 34. At the time of starting up the fire extinguishing equipment, the water supply main pipe 18 and the branch pipe 26 are filled with fire extinguishing water by operating the fire extinguishing pump 18 so that a predetermined pressure is obtained.

  If one of the closed heads 30 is opened by receiving a thermal air current due to a fire and sprays fire-fighting water, the valve of the water flow detection device 28 is opened by the water flowing through the branch pipe 26, and the water flow detection signal is illustrated. It outputs to the control panel etc. that do not perform necessary control and notification such as equipment operation display.

  Further, the water pressure in the water supply main pipe 16 is also reduced by water spraying from the closed head 30, and the pressure switch 24 of the pressure tank 22 detects that the pressure has dropped below the specified pressure and outputs a pressure drop detection signal to the pump control panel 14. By doing so, the fire pump 10 is started by the motor 12.

  At the same time, the pressure drop detection signal from the pressure switch 24 is also output to the gas generator 34, and the gas generator 34 supplies an inert gas such as nitrogen gas or carbon dioxide gas to the mixer 36.

  The mixer 36 mixes the inert gas supplied from the gas generator 34 with the fire-extinguishing water supplied under pressure from the fire-extinguishing pump 10, and supplies the fire-extinguishing water under pressure to the closed head 30 operated via the branch pipe 26. To do.

  For example, a bubble generating device 40 shown in FIG. 2 is arranged in front of the closed head 30, and the fire water mixed with an inert gas is converted into a swirling water flow by the guide vane 42 and then collided with the current cutter 44. Fine bubbles of 10 μm or less are generated and sprinkled from the open closed head 30.

  Bubbles containing inert gas sprinkled from the closed head 30 have a bubble diameter of 10 μm or less, and can be made sufficiently smaller than conventional microbubbles having a bubble diameter of more than 10 μm, and have strong self-shrinkage due to the action of surface tension. Since the shrinkage speed is high, it rapidly shrinks after being released from the head, and the characteristics as bubbles can be maintained.

  Further, the generation of bubbles is generated by friction or shearing of water flowing at a high speed containing an inert gas, and is negatively charged. On the other hand, since the combustibles and buildings are positively charged, the water containing the discharged bubbles positively reaches and adheres to the combustion surface and the inner wall of the building due to electrostatic force, and the cooling action by water and the faults contained in the bubbles. Combustion suppression by active gas occurs, and an equivalent fire extinguishing effect can be expected even with half the amount of water of normal fire extinguishing equipment. In addition, the amount of gas can be suppressed and the adverse effects on the human body can be reduced as compared with fire extinguishing equipment that emits only gas such as CO 2 and extinguishes fire.

  Further, the bubbles of this embodiment are subjected to electrostatic repulsion after discharging water from the head by surface charging, and even if they are nano-level bubbles, they can exist in a floating state for 10 minutes or more.

  Moreover, the water containing the bubble that is discharged from the head and reaches the combustion field converts the thermal energy of the fire into energy that crushes the bubble, thereby suppressing an increase in temperature. At the same time, the combustion field is cooled by the water forming the bubbles, and the suffocation effect by the inert gas contained in the bubbles is obtained.

  Moreover, the part covered with the bubble has a heat blocking effect, and can secure an evacuation route and an evacuation time.

  Moreover, since the water in the bubble is discharged from the head, the total surface area due to the bubble is increased, and it is adsorbed and dropped by harmful molecules such as smoke, so that the view and breathing of the evacuating person can be ensured. Furthermore, since the bubbles disappear within a few hours after water discharge, cleaning after fire extinguishing can be made unnecessary.

  On the other hand, when an active gas such as oxygen gas or air is generated by the gas generator 34, the generated active gas is mixed with the fire-extinguishing water pressurized and supplied from the fire-extinguishing pump 10 by the mixer 36. In 40, the fire-extinguishing water flowing when the closed head 30 is opened is collided with a projecting member that functions as a current cutter projecting inside after being converted into a swirling flow, and the active gas mixed in the fire-extinguishing water is crushed into fine bubbles. As a result, a bubble having a bubble diameter of several tens of μm or less (preferably 10 μm or less) is generated and sprinkled from the opened closed head 30.

When oxygen gas is mixed with fire-extinguishing water in this way, bubbles with a bubble diameter of several tens of μm or less (preferably 10 μm or less) are generated by the bubble generator 40 and sprinkled from the opened closed head 30, The oxygen gas contained in the bubble reacts with the CO generated by the fire on the radiation surface and changes to CO ₂ , thereby suppressing adverse effects on the human body.

  In addition, in the protective space other than the radiation surface, the amount of oxygen slightly increases, and adverse effects on the human body can be suppressed. In this case, even if the amount of oxygen in the protective space increases slightly, the fire is sufficiently suppressed by the cooling action by the water containing the discharged bubbles, and combustion is not promoted.

  Next, the operation of the test apparatus 90 will be described. In periodic inspections or the like periodically performed, the test apparatus 90 is connected to the inlet valve 100 and the outlet valve 102 by the connection flanges 104 and 106 to prepare for the test.

  Normally, the three-way switching valve 98 is switched to the port b, and when the end test valve 32 is opened for the test, the fire extinguishing water corresponding to the opening operation of one closed head 30 flows into the drain pipe 35, A drop in the pressure in the pipe is detected by the operation of the pressure switch 24 of the pressure tank 22, and the fire extinguishing pump 10 is started to flow pressurized fire-extinguishing water through the drain pipe 35.

  At this time, the inert gas or the active gas generated by the gas generator 34 is mixed with the fire-extinguishing water by the mixer 36, and is several tens μm or less (preferably 10 μm or less) by the bubble generator 60 provided on the primary side of the end test valve 34. ) Bubbles having the bubble diameter are generated and flowed to the drain pipe 35.

  In this state, when the gate valves 95 and 96 and the inlet valve 100 and the outlet valve 102 of the test apparatus 90 are opened and the three-way switching valve 98 is switched from the port b to the port a, the fire-extinguishing water passes through the collection tank 92 of the test apparatus 90. And flows into the drainage 35.

  When the sampling tank 92 is filled with fire extinguishing water, the three-way switching valve 98 is switched to the port c, the inlet valve 100 and the outlet valve 102 are closed, and the fire extinguishing water containing bubbles generated by the bubble generator 60 is supplied. The sample is collected in the collection tank 92.

  When the extinguishing water is collected in the collecting tank 92, the end test valve 32 is closed, the operation of the extinguishing pump 10 is stopped, and the in-pipe pressures of the water supply main pipe 18 and the branch pipe 26 are maintained at a specified pressure. Return to the state.

  Subsequently, the fire extinguishing water sampled in the sampling tank 92 of the test apparatus 90 is brought into a static state for a predetermined time to separate the bubble gas contained in the fire extinguishing water. When a predetermined settling time has elapsed, the fire extinguishing water collected in the collection tank 90 is separated into gas and water. In this state, the gas amount V1 and the water amount V2 separated from the scale 94 of the collection tank 92 are obtained. taking measurement.

For example, the expansion ratio K is obtained from the following equation by taking the ratio between the measured gas amount V1 and water amount V2.
K = V1 / V2
The foaming ratio K obtained in this way is compared with a predetermined reference foaming ratio Kr, and if it is within a predetermined error range, it is determined that bubble generation is appropriate, and if it exceeds the predetermined error range, a bubble is determined. Judge the occurrence as inappropriate and take necessary measures such as changing the gas mixture ratio. It should be noted that the static setting after collecting the fire-fighting water by the test apparatus 90 may be performed by removing the test apparatus 90 and storing it in another place.

  FIG. 8 is an explanatory view showing another embodiment of the fire extinguishing equipment according to the present invention. In this embodiment, the test apparatus 90 is fixedly installed.

  In FIG. 8, a test apparatus 90 is fixedly installed on the drain pipe 35 connected to the secondary side of the end test valve 32. That is, a transparent collection tank 92 is connected to the drain pipe 35 as a test apparatus 90, and the collection tank 92 is provided with a scale 94. In the present embodiment, since the bubble generating device 40 is provided in the downcomer of the closed head 30, a dedicated bubble generating device 60 is provided corresponding to the test device 90. The other configuration is the same as that of the embodiment of FIG.

  Thus, if the test apparatus 90 is fixedly installed, it is not necessary to prepare for attaching or detaching the test apparatus 90 during the test, and the test can be easily performed.

  FIG. 9 is an explanatory view showing another embodiment of the fire extinguishing equipment according to the present invention, and this embodiment is characterized in that a dissolved concentration meter is provided as the test apparatus 90.

  In FIG. 9, a test apparatus 90 is fixedly installed on the drain pipe 35 connected to the secondary side of the end test valve 32. The test device 90 branches the drainage pipe 35 on the secondary side of the end test valve 34 and pipes the open type collection tank 114 through an orifice 114 and an inlet valve 118 that restrict the collection flow rate. The collection tank 114 is connected to the drain pipe 35 again via an outlet valve 120 provided in the bottom pipe.

  The dissolved concentration meter 110 is, for example, a portable type, and a probe 112 is cable-connected to the main body, and is used for measurement by being carried to a place where the test apparatus 90 is installed during a test. That is, the extinguishing water is collected in the collection tank 114, the detection part at the tip of the probe 112 is immersed, and the dissolved concentration is digitally displayed on the display of the dissolved concentration meter 110.

  In this measurement state, it is necessary to measure while flowing the fire-extinguishing water without stagnation. Therefore, both the inlet valve 118 and the outlet valve 114 are opened, and the fire-extinguishing water is measured while flowing in an amount determined by the orifice 116. The other configuration is the same as that of the embodiment of FIG.

  As the dissolved concentration meter 110 used in the present embodiment, a dissolved concentration meter that measures the dissolved concentration of carbon dioxide and the dissolved concentration of oxygen is known. Therefore, the gas generator 34 generates carbon dioxide gas or oxygen gas. Applicable when mixing.

  As described above, by using the dissolved concentration meter 110 as the test apparatus 90, it is possible to more accurately measure and judge the appropriateness of the generation of bubbles contained in the water for fire extinguishing by the bubble generating apparatus 60. The measuring device 90 using the dissolved concentration meter 110 may have an appropriate structure as long as it can be immersed in fire extinguishing water from which the probe 114 is collected.

Here, the dissolved concentration meter 110 measures the concentration of an inert gas or an active gas dissolved in water. The saturated solubility [mg / liter] of gas at 20 ° C. at 1 atm (0.101 MPa) is as follows. It is known that
Nitrogen 19.6mg
Carbon dioxide 1850mg
Oxygen 43.9mg
It becomes.

If air is 79% nitrogen and oxygen is 21%,
Nitrogen 15.4mg
Oxygen 9.3mg
It becomes.

  At present, there is no known dissolved nitrogen concentration meter as a portable type. However, if the measured value of oxygen is obtained with an oxygen dissolved concentration meter, it is possible to estimate the nitrogen concentration from the ratio of the saturation solubility of the two, for example. Become.

  FIG. 10 is an explanatory view showing another embodiment of the fire extinguishing equipment according to the present invention. In this embodiment, the bubble generator is connected to a water supply main pipe or a branch pipe between the mixer and the closed head. It is provided.

  In FIG. 10, the bubble generating device 60 of the present embodiment is provided in the water supply main pipe 18 between the secondary side of the mixer 36 and the branch portion of the branch pipe 26. In addition, a bubble generating device 60 is provided in the branch pipe 60 on the secondary side of the flowing water detection device 60 as necessary. That is, the bubble generator 60 may be provided at any position as long as it is between the secondary side of the mixer 36 and the closed head 30, and a plurality of bubble generators 60 may be provided as necessary. Also good.

  Further, the test apparatus 90 is detachable as shown in FIG. 1, and the fire extinguishing water is collected in a transparent collection tank 92 of the test apparatus 90, and is settled for a predetermined time to be separated into gas and water. To determine the appropriateness of the bubble occurrence.

  In this embodiment, since the bubble generator 60 is provided in the water supply main pipe 18 and the branch pipe 26, a dedicated bubble generator 60 is provided for the test apparatus 90 as in the embodiment of FIG. There is no need.

  Furthermore, the bubble generating device 60 used in this embodiment has the structure shown in the embodiment of FIG. 6 or FIG. 7, and the water supply main pipe 18 and the branch pipe 26 only have different pipe diameters. The same.

  By providing the bubble generator 60 in the water supply main pipe 18 and / or the branch pipe 26 in this way, the number of installed bubble generators 40 is larger than when the bubble generator 40 is provided for each closed head as shown in FIG. And the equipment cost can be reduced.

  FIG. 11 is an explanatory view showing another embodiment of the fire-extinguishing equipment according to the present invention. In this embodiment, a mixer and a bubble generator are provided in the suction pipe 15 of the fire-extinguishing pump. .

  In FIG. 11, the mixer 36 is provided in the suction pipe 15 lowered from the fire pump 10 to the water source water tank 16, and the fire extinguishing water sucked from the water source water tank 16 when the fire pump 10 is operated is supplied from the gas generator 34 by the mixer 36. The inert gas thus mixed is mixed, pressurized by the pump 10, and supplied from the water supply main pipe 18 to the closed head 30 in which the branch pipe 26 is opened.

  Following the mixer 36, a bubble generating device 60 is provided so that bubbles are generated by swirling collision of fire-extinguishing water mixed with an inert gas, and then pressurized by the fire-extinguishing pump 10 to be supplied. Other configurations are the same as the fire extinguishing equipment of FIG.

  If necessary, a bubble generating device 40 may be provided for each closed head 30 as shown by a broken line, or in the branch pipe 26 and the water supply main pipe 18.

  Thus, by providing the mixer 36 and the bubble generator 60 in the suction pipe 15 of the fire pump 10, the fire-extinguishing pump that mixes the inert gas in the mixer 36 and generates bubbles in the bubble generator 60 is extinguished. Thus, the mixed state of the bubbles containing the inert gas with respect to the fire-extinguishing water can be made more uniform by stirring at this time.

  The bubble generating device 60 may be provided not in the suction pipe 15 but in the water supply main pipe 18 on the secondary side of the fire pump 10, and only the mixer 36 may be provided in the suction pipe 15.

  FIG. 12 is an explanatory view showing another embodiment of the fire extinguishing equipment according to the present invention, and this embodiment is characterized in that a stirring pump is provided after the fire extinguishing pump.

  In FIG. 12, a mixer 36 is provided in the water supply pipe 18 from the fire extinguishing pump 10, and the inert gas supplied from the gas generator 34 is mixed with fire extinguishing water. The water supply main pipe 18 on the secondary side of the mixer 36 is connected to an agitation pump 72 using a vortex pump or the like, and agitation water mixed with an inert gas is agitated to uniformly mix the inert gas and create bubbles. It is miniaturized. The agitation pump 72 is driven by a motor 74.

  A bubble generating device 60 is provided before the water supply main pipe 18 connected to the secondary side of the agitation pump 72, and a bubble is generated by a swirling collision of fire-extinguishing water mixed with an inert gas. To send to.

  Further, as indicated by a broken line, a bubble generating device 40 may be provided for each closed head 30 or in the branch pipe 26 as necessary.

  Further, as a backup for the failure of the agitation pump 72, it is desirable to provide a bypass pipe 76 that bypasses between the fire-extinguishing pump 10 and the bubble generator 18, and to control the opening by the remote control valve 78 when the agitation pump 72 fails. Other configurations are the same as the fire extinguishing equipment of FIG.

  As described above, the inert gas is mixed into the fire-extinguishing water from the fire-extinguishing pump 10 with the mixer 36 and then stirred with the stirring pump 72 and supplied to the head side. Further, the bubbles become even more uniform and the bubbles of the inert gas are reduced, and the bubbles can be efficiently generated by the bubble generator 60.

  In addition, although said embodiment took the fire extinguishing equipment using a closed type head as an example, the foam fire extinguishing equipment which mixes a fire extinguishing agent and sprays a fire extinguishing foam from a head, or an open type head is a simultaneous open valve. It can be applied to appropriate fire extinguishing equipment such as fire extinguishing equipment provided on the secondary side.

  Alternatively, a device that opens a control valve that opens with a sensor or a start button in a pipe before the head and sprays water from the open head may be used.

  In addition, when filling the pipe, the inert gas may or may not be mixed together. When mixed, the inert gas accumulated in the piping can prevent corrosion in the piping.

  As another bubble generating device applicable to the present invention, a second guide that forms a swirling flow opposite to the guide vane 42 instead of the current cutter 44 of FIG. 2 or between the current cutter 44 and the guide vane 42 is used. A bubble may be formed by providing a vane.

The present invention includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

18: Water supply main 30: Closed head 32: Terminal test valve 34: Gas generator 35: Drain pipe 36: Mixer 40, 60: Bubble generator 41, 61: Main body 42: Guide vane 44: Current cutter 46: Falling pipe 48: Body 50: Pipe connecting part 52: Pipe connecting screw 54: Heat sensitive operating part 56: Deflector 58: Bubble generating part 62: Primary side flange 64: Secondary side flange 66: Casing 68: Support member 70: Support fin 72: Stirring pump 76: Bypass piping 78: Remote control valve 80: Turbine blade type nozzle 82: Main body 84: Turbine blade 90: Test device 92, 114: Collection tank 94: Scale 98: Three-way switching valve 100: Inlet valve 102: Outlet valve 110: Dissolved concentration meter 112: Probe 114: Collection container

Claims (18)

In the event of a fire, a predetermined gas is mixed with fire-fighting water pressurized and supplied by a fire-extinguishing pump with a mixer, and water is sprayed from the head connected to the branch pipe. In fire extinguishing equipment provided with a bubble generator that generates bubbles with a bubble diameter,
A fire extinguishing facility comprising a test device for measuring a gas amount contained in water for fire extinguishing including bubbles generated by the bubble generating device.
2. The fire extinguishing equipment according to claim 1, wherein the test device collects fire extinguishing water containing bubbles generated by the bubble generating device, and statically collects the extinguishing water collected to separate into inert gas and fire extinguishing water. Fire extinguishing equipment that makes it possible to measure each quantity.
The fire extinguishing equipment according to claim 2, wherein the test apparatus comprises:
A transparent collection container with a scale to measure the internal volume;
An inlet valve for introducing fire-fighting water that has passed through the valve generator into the different species container;
An outlet valve for discharging fire-fighting water from the collection container;
Fire extinguishing equipment characterized by comprising
The fire extinguishing equipment according to claim 3, wherein the test device connects the inlet valve to a secondary drain pipe of a terminal test valve provided at an end of the branch pipe through a three-way switching valve, and A fire extinguishing system, characterized in that the secondary side of the outlet valve is connected to the secondary drainage pipe of the three-way switching valve.
4. The fire extinguishing equipment according to claim 3, wherein the test device is provided in the middle of a secondary drain pipe of a terminal test valve provided at an end of the branch pipe.
2. The fire extinguishing equipment according to claim 1, wherein the test device is a dissolved concentration meter that measures a dissolved concentration of fire-extinguishing water collected from a secondary drain pipe of a terminal test valve provided at an end of the branch pipe. Fire extinguishing equipment characterized by
The fire extinguishing equipment according to claim 1, wherein when the bubble generating device is provided for each falling pipe of the head, another bubble generating device is provided on the primary side of the branch pipe leading to the test device. Special fire extinguishing equipment.
2. The fire extinguishing equipment according to claim 1, wherein the bubble generating device is provided in the middle of the branch pipe in front of the head.
2. The fire extinguishing equipment according to claim 1, wherein the mixer is provided in a water supply main connected to the secondary side of the fire pump, and the bubble generating device is provided in a water supply main on the secondary side of the mixer. Fire extinguishing equipment characterized by that.
The fire extinguishing equipment according to claim 1, wherein the mixer is provided in a suction pipe connected to a primary side of the fire pump, and the bubble generating device is provided in a suction pipe on a secondary side of the mixer. Fire extinguishing equipment characterized by
The fire extinguishing equipment according to claim 1, wherein the mixer is provided in the middle of the water supply main pipe on the secondary side of the fire pump, and a stirring pump is provided on the water supply pipe on the secondary side of the mixer. Fire extinguishing equipment.
The fire extinguishing equipment according to claim 11, further comprising a bypass pipe provided with a gate valve that bypasses the stirring pump.
The fire extinguishing equipment according to any one of claims 1 to 12, wherein the bubble generating device is:
A guide vane that forms a spiral water flow;
A cutter that generates bubbles by shearing the spiral water flow formed by the guide base;
Fire extinguishing equipment characterized by comprising
14. The fire-extinguishing equipment according to claim 13, wherein the cutter of the bubble generating device has a projecting member erected from the inner peripheral wall of the main body tube toward the center in a spiral shape in the axial direction.
14. The fire extinguishing equipment according to claim 13, wherein the cutter of the bubble generating device has a support member arranged in an axial direction in a main body, and a protruding member is erected on an outer periphery of the support member and arranged in a spiral shape in the axial direction. Fire extinguishing equipment characterized by that.
The fire extinguishing equipment according to any one of claims 1 to 12, wherein the bubble generating device includes a turbine blade type nozzle disposed in a main body and having a turbine blade that generates a vortex flow formed on an outer periphery thereof. A fire extinguishing system characterized by generating a bubble having a bubble diameter of several tens of μm or less by vortex breaking a vortex generated by a mold nozzle by narrowing an inflow passage.
The fire extinguishing equipment according to any one of claims 1 to 12, wherein the bubble generating device includes a guide vane that is disposed in the main body and forms a spiral water flow, and the vortex generated by the guide vane is used as an inflow path. The fire extinguishing equipment is characterized in that a vortex is broken by narrowing down and bubbles having a bubble diameter of several tens of μm or less are generated.
  The fire extinguishing equipment according to any one of claims 1 to 12, wherein the bubble generating device is arranged in the main body and has a bubble diameter of several tens of micrometers or less by arranging a plurality of guide vanes that form spiral water flows in different directions. Fire extinguishing equipment characterized by generating bubbles.

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