JP3843418B2 - Bubble fire extinguishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foam fire extinguishing equipment that can perform a foaming test without causing the foam to flow out to the outside.
[0002]
[Prior art]
Conventionally, bubble extinguishing equipment that extinguishes fire with foam is known. This foam fire extinguishing equipment prevents the contact between air and a combustible material (for example, oil) with foam, and extinguishes the fire by the suffocation action and the cooling action by moisture contained in the foam.
[0003]
In such foam fire extinguishing equipment, it is necessary to periodically inspect the equipment. The contents of the inspection include operating the manual start valve to ensure that the running water detector operates properly, or that foam is released from the foam head (foam test), and the released foam remains in the foam state for a specified time before the aqueous solution. (Performance test).
[0004]
[Problems to be solved by the invention]
As described above, in the conventional foam fire extinguishing equipment, the manual start valve is periodically operated to inspect the equipment, and the running water detection device, the foam test, and the performance test are conducted. However, this inspection is cumbersome because the bubbles are released throughout the protected area. Furthermore, if bubbles are released throughout the protected area, the amount of water drained into the sewage will increase if the bubbles are reduced to an aqueous solution.
[0005]
The technical problem of the present invention is to make it possible to perform inspection without causing bubbles to flow out to the outside at the time of inspection of the foam fire extinguishing equipment.
[0006]
[Means for Solving the Problems]
The foam fire-extinguishing equipment according to claim 1 of the present invention has the following configuration. That is, the outflow detection means installed between the primary side pipe and the secondary side pipe, the closed or open type foam head connected to the secondary side pipe, and the foam provided in the middle of the primary side pipe In a foam fire-extinguishing equipment having a mixer for mixing an undiluted solution and water to produce a foam aqueous solution, a test pipe provided on the secondary side of the outflow detection means, and a normally closed pipe installed in the middle of the test pipe and the test valve, and the test foam head mounted in an open state at the tip of the test pipe, a foaming test apparatus provided with a reserve tank hoards bubbles released from the foam head the test, the test foam A head is disposed in the foam test apparatus, and a foam test is performed without causing bubbles to flow out .
Moreover, the foam fire extinguishing equipment which concerns on Claim 2 of this invention consists of the following structures. That is, the outflow detection means installed between the primary side pipe and the secondary side pipe, the closed or open type foam head connected to the secondary side pipe, and the foam provided in the middle of the primary side pipe In a foam fire-extinguishing equipment having a mixer for mixing an undiluted solution and water to produce a foam aqueous solution, a test pipe provided on the secondary side of the outflow detection means, and a normally closed pipe installed in the middle of the test pipe A foam test apparatus having a test tank, a test foam head attached to the tip of the test pipe in an open state, and a reserve tank for storing foam released from the test foam head, Has a container surrounding the test foam head.
In the inventions of claims 1 and 2 , the foam fire-extinguishing equipment is inspected by opening a normally-closed test valve installed in the middle of the test pipe manually or remotely to simulate a fire of the foam fire-extinguishing equipment system. This is done by placing it in a generating state. The secondary side pipe is filled with a foam aqueous solution, and bubbles are released from the open test foam head at the same time as the test valve is opened. As a result, when the pressure in the secondary pipe decreases, the outflow detection means operates and outputs an outflow signal to the control panel, so that the outflow detection means operates normally.
Moreover, the pressure drop of a well-known pressure air tank detects the pressure drop of a primary side piping, outputs a pressure drop signal to a pump control panel, a pump is started, and the foam aqueous solution mixed with the mixer is supplied. . The foam discharged from the test foam head in the container and the foam aqueous solution reduced to the aqueous solution are stored in a reserve tank of the foam test apparatus.
In this way, a test pipe is provided on the secondary side of the outflow detection means, a test valve that is normally closed is installed in the middle of the test pipe, and a test foam head is attached to the tip of the test pipe in an open state. Close the fire by placing the test foam head in a foam test apparatus with a reserve tank , or by configuring the foam test apparatus with a reserve tank to have a container surrounding the test foam head. A foam test in a foam fire extinguishing system that senses with a mold foam head can be performed without causing the foam to flow outside, and the foam is not released to the entire protected area due to the foam test. Furthermore, the foam aqueous solution stored in the reserve tank can be reused, and there is no need for wastewater treatment to sewage.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1. FIG.
Hereinafter, the present invention will be described based on illustrated embodiments.
FIG. 1 is a schematic view showing a foam fire extinguishing facility according to a first embodiment of the present invention.
[0012]
The foam fire-extinguishing equipment of the present embodiment includes a primary pipe 1, a secondary pipe 2 provided for each protection section, and an outflow detection installed between the primary pipe 1 and each secondary pipe 2. A flowing water detection device 3 as means, a closed-type foam head 4 connected to a plurality of locations on the secondary side pipe 2, and a foam stock solution from the foam stock solution tank 5 and a pump 6 provided in the middle of the primary side pipe 1. A mixer 8 that mixes water from the water tank 7 to be pumped to generate a foam aqueous solution, and a test pipe 9 that is branched from the secondary pipe 2 between the flowing water detector 3 and the closed foam head 4. And a normally closed test valve 11 installed in the middle of the test pipe 9, a test foam head 4A attached to the end of the test pipe 9 in an open state, and a container 12 surrounding the test foam head 4A. In addition, the bottom part stores the foam discharged from the test foam head 4A. And a foam testing apparatus 13 having Butanku 12a. As the test foam head 4A, the one in which the closed foam head 4 detects a fire and is in an open state, that is, the one having no heat sensitive part such as a glass bulb is used. Moreover, the upper part of the container 12 should just be in a position higher than the foam head 4A for a test, and does not necessarily need to surround the foam head 4A for a test.
[0013]
The foam stock solution tank 5 is configured such that the inside is separated into two upper and lower chambers by a diaphragm 5a, the foam stock solution is stored in the lower chamber 5b, and a part of the water from the pump 6 flows into the upper chamber 5c. Then, the water flowing into the upper chamber 5c becomes the working fluid, and the same amount of the foam stock solution as the inflowing water is sent out to the mixer 8.
[0014]
A check valve 14 is installed in the secondary side pipe of the mixer 8 to prevent the aqueous foam solution in the reserve tank 12a from flowing into the mixer 8 when the auxiliary pump 18 is activated.
[0015]
A pressure air tank 15 is connected to the primary side pipe 1 of the secondary side of the pump 6, and a pressure switch 16 for detecting a decrease in the internal pressure is connected to the pressure air tank 15. It is connected to a pump control panel 17 that controls the pump 6. Accordingly, when the pressure in the pressurized air tank 15 decreases due to the pressure drop in the pipe, the pressure switch 16 detects this and notifies the pump control panel 17, and the pump control panel 17 starts the pump 6 immediately. ing.
[0016]
Since the reserve tank 12a is provided with a check valve 14 between the flowing water detection device 3 and the mixer 8, here, the reserve tank 12a is connected between the flowing water detection device 3 and the check valve 14 via an auxiliary pump 18. The foam aqueous solution stored in the reserve tank 12a during the foaming test can be reused without being recovered.
[0017]
At the top of the container 12 of the foaming test apparatus 13, a door 19 is provided as a means for taking out the foam foamed in the container 12 during the foaming test, and a slope 21 is formed by a flat plate directly under the door 19. Then, the taken-out foam is made to flow downward on the slope 21 so that the foam can be collected at the lower side, and the performance test of the aqueous foam solution can be performed. In addition, although the door 19 was mentioned as an example as a means for taking out the foam to the outside here, for example, a drawer having a depth dimension that protrudes a predetermined amount into the lower space of the test foam head 4A is provided on the top of the container 12, for example. Needless to say, various types of devices such as installation can be adopted as appropriate.
[0018]
Inspection of the foam fire extinguishing equipment of this embodiment is performed as follows. First, the normally closed test valve 11 installed in the middle of the test pipe 9 is opened manually or remotely to place the foam fire extinguishing system in a simulated fire condition. The secondary side pipe 2 is filled with a foam aqueous solution, and when the test valve 11 is opened, it is discharged as foam from the test foam head 4A. Thereby, if the pressure in the secondary side piping 2 falls, the flowing water detection apparatus 3 will operate | move and will output a flowing water signal to the monitoring panel which is not shown in figure. If there is a running water signal output from the running water detection device 3, it can be confirmed by the display device of the monitoring panel, so that it is understood that the running water detection device 3 has operated normally.
[0019]
Moreover, if the pressure of the primary side piping 1 falls, the pressure in the pressurized air tank 15 will fall. This pressure drop in the pressure air tank 15 is detected by the pressure switch 16, and the pump control panel 17 is notified that the pressure has dropped. When the signal from the pressure switch 16 is input, the pump control panel 17 immediately starts the pump 6, generates the aqueous foam solution using the mixer 8, and starts supplying the aqueous foam solution.
[0020]
The foam discharged from the test foam head 4A in the container 12 and the foam aqueous solution reduced to the aqueous solution are all stored in the reserve tank 12a of the foam test apparatus 13, and are reused in the next foam test. This reuse is performed by starting the auxiliary pump 18 instead of starting the pump 6 when the pressure switch 16 detects a pressure drop during inspection and a pressure drop signal is input to the pump control panel 17. In addition, a water level sensor is provided in the reserve tank 12a, or a flow switch comprising a pair of electrodes for detecting the presence of the aqueous foam solution is provided in the pipe between the reserve tank 12a and the auxiliary pump 18, so that the auxiliary pump is first introduced in the event of a fire. 18 may be activated and the pump 6 may be activated when it is detected by the output of the water level sensor or flow switch that the aqueous foam solution in the reserve tank 12a has been exhausted.
[0021]
In the performance test of the foam aqueous solution, the container 19 of the foam test apparatus 13 is filled with foam, the door 19 is opened, a part of the foam is taken out, and the taken foam is allowed to flow down on the slope 21 as it is. The foam is collected in a box or the like, and it is confirmed whether the foam remains in a foam state for a predetermined time and whether the expansion ratio is appropriate.
[0022]
As described above, in the foam fire extinguishing equipment of this embodiment, the test pipe 9 is provided by branching to the secondary side of the flowing water detection device 3, that is, in front of the closed foam head 4, and is always in the middle of the test pipe 9. A closed test valve 11 is installed, a test foam head 4A is attached to the tip of the test pipe 9 in an open state, the test foam head 4A is installed, and a foam test apparatus 13 comprising a container 12 having a reserve tank 12a at the bottom. By placing it inside, the foam test in the foam fire extinguishing system that detects the occurrence of fire with the closed foam head 4 can be performed without causing the foam to flow outside. No bubbles are released.
[0023]
Moreover, the foam aqueous solution stored in the reserve tank 12a can be reused, and there is no need for wastewater treatment to sewage.
[0024]
Embodiment 2. FIG.
FIG. 2 is a schematic view showing the foam fire extinguishing equipment according to the second embodiment of the present invention, and the same reference numerals are given to the same parts as those of the first embodiment.
[0025]
The foam fire-extinguishing equipment of this embodiment uses an open-type foam head 31 as a foam head connected to the secondary side pipe 2 arranged for each protection section, and between the primary side pipe 1 and each secondary side pipe 2. A simultaneous opening valve 32 having a cylinder chamber for valve opening is installed on the secondary side of the flowing water detection device 3 installed in each, and a closed sprinkler for detecting fire in the middle of the cylinder chamber of the simultaneous opening valve 32. One end of a fire detection pipe 35 to which a head 33 and a normally closed start valve 34 are connected is connected. A normally-open gate valve 36 is installed between the simultaneous opening valve 32 and the open-type foam head 31, and a test pipe 9A is provided by branching between the simultaneous opening valve 32 and the gate valve 36. A test valve 11A that is normally closed is installed in the middle of the pipe 9A for the test, and is further opened at the tip of the test pipe 9A in the container 12 of the foaming test apparatus 13 so that the same type as the open type foam head 31 is opened. A mold test foam head 31A is attached. Other configurations are the same as those of the first embodiment.
[0026]
Inspection of the foam fire extinguishing equipment of this embodiment is performed as follows. First, the normally open gate valve 36 installed between the simultaneous open valve 32 and the open type foam head 31 is closed manually or remotely, and the normally closed test valve 11A installed in the test pipe 9A is manually operated. Alternatively, it is opened by remote operation, and in this state, the normally closed start valve 34 installed in the fire detection pipe 35 is opened manually or by remote operation, and the system of the foam extinguishing equipment is put in a simulated fire occurrence state. In this way, when the start valve 34 is opened in a state where the secondary side pipe 2 of the simultaneous release valve 32 is connected to the foaming test apparatus 13 via the open type foam head 31A, it is enclosed in the fire detection pipe 35. Pressurized water or compressed air that flows out. When pressurized water or compressed air sealed in the fire detection pipe 35 flows out, the pressure in the fire detection pipe 35 decreases and the simultaneous release valve 32 opens, and the primary side and the secondary side of the simultaneous release valve 32 communicate with each other. Then, the foam aqueous solution sealed in the primary side pipe of the simultaneous release valve 32 flows to the test pipe 9A and is discharged as bubbles from the open type test foam head 31A. Thereby, the running water detection device 3 operates and outputs an outflow signal to a control panel (not shown). If there is an outflow signal output from the running water detection device 3, it can be confirmed by the display device on the control panel, so it can be seen that the running water detection device 3 has operated normally, and that the simultaneous release valve 32 has been operated normally. can do.
[0027]
Moreover, the pressure switch 16 of the pressure air tank 15 detects the pressure drop of the primary side pipe 1, outputs a pressure drop signal to the pump control panel 17, the pump 6 is started, and the aqueous foam solution is generated by the mixer 8. To start supplying the aqueous foam solution. The foam discharged from the open type test foam head 31 </ b> A in the container 12 and the foam aqueous solution reduced to the aqueous solution are stored in a reserve tank 12 a below the foam test apparatus 13.
[0028]
In this way, the test pipe 9A is provided by branching between the simultaneous opening valve 32 and the gate valve 36, the normally closed test valve 11A is installed in the middle of the test pipe 9A, and at the tip of the test pipe 9A. An open type test foam head 31A is attached, and the open type test foam head 31A is disposed in a foam test apparatus 13 comprising a container 12 having a reserve tank 12a in the lower part, thereby preventing a fire from occurring in the closed type sprinkler head 33. It is possible to perform a foaming test in a foam fire extinguishing system that senses and releases foam from the open-type foam head 31 without causing the foam to flow outside, and the foam is released to the entire protected area for the foaming test. It will not be. Furthermore, the foam aqueous solution stored in the reserve tank 12a can be reused, and there is no need for wastewater treatment to sewage. The gate valve 36 and the test valve 11A may be configured by a three-way switching valve.
[0029]
In the first embodiment described above, the test pipe does not have to be branched in front of the closed type foam head. For example, the test pipe may be provided at the end of the secondary side pipe.
[0030]
In the second embodiment described above, the fire extinguishing equipment provided with the fire-detecting closed sprinkler head and the simultaneous opening valve has been described as an example. However, the present invention can also be applied to the following fire extinguishing equipment. is there. In other words, the present invention can also be applied to a fire extinguishing system in which a normally closed valve with a water flow detection function is provided as a spill detection means, and the valve is opened when a fire detector provided in the protection section detects a fire. it can.
[0031]
【The invention's effect】
As described above , according to the present invention, the foam test in the foam fire-extinguishing equipment can be performed without causing the foam to flow outside, and the foam is not released to the entire protected area for the foam test. . Furthermore, it becomes possible to reuse the foam aqueous solution stored in the reserve tank, eliminating the need for wastewater treatment to sewage.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a foam fire extinguishing facility according to a first embodiment of the present invention.
FIG. 2 is a schematic view showing a foam fire extinguishing facility according to a second embodiment of the present invention.
[Explanation of symbols]
1 Primary side pipe 2 Secondary side pipe 3 Flowing water detection device (outflow detection means)
4 Closed Foam Head 4A Test Foam Head 8 Mixer 9, 9A Test Pipe 11, 11A Normally Closed Test Valve 12 Container 12a Reserve Tank 13 Foam Test Device 18 Auxiliary Pump 19 Door (Foam Extraction Means)
31 Open type foam head 31A Open type test foam head;
32 Simultaneous opening valve 33 Closed sprinkler head for fire detection 34 Normally closed start valve 35 Fire detection piping 36 Normally open gate valve

Claims (2)

Outflow detection means installed between the primary side pipe and the secondary side pipe, a closed type or open type foam head connected to the secondary side pipe, provided in the middle of the primary side pipe, In a foam fire-extinguishing equipment having a mixer that mixes water to produce an aqueous foam solution,
A test pipe provided on the secondary side of the outflow detection means;
A normally closed test valve installed in the middle of the test pipe;
A test foam head attached in an open state to the end of the test pipe;
A foam test apparatus having a reserve tank for accumulating foam discharged from the test foam head is provided , and the test foam head is disposed in the foam test apparatus to perform a foam test without causing the foam to flow outside. Foam extinguishing equipment characterized by performing . Outflow detection means installed between the primary side pipe and the secondary side pipe, a closed type or open type foam head connected to the secondary side pipe, provided in the middle of the primary side pipe, In a foam fire-extinguishing facility having a mixer that mixes water to produce an aqueous foam solution,
A test pipe provided on the secondary side of the outflow detection means;
A normally closed test valve installed in the middle of the test pipe;
A test foam head attached in an open state to the end of the test pipe;
It provided a foam testing apparatus having a reserve tank which save up bubbles to be released from the test foam head, foam test apparatus, the foam fire-extinguishing system you further comprising a container enclosing the test foam head.

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