JP4762675B2 - Foam release test method and apparatus - Google Patents

Description

The present invention relates to a foam emission test method and apparatus for performing a performance test of a pressure proportioner type foam fire extinguishing equipment, and more specifically, a foam fire extinguishing equipment using a protein foam extinguisher as a foam stock solution. The present invention relates to a foam release test method and an apparatus therefor .

  Foam extinguishing equipment is required by the law to conduct a foam release test regularly. In the foam fire extinguishing equipment using protein foam stock solution, the foam stock solution tank is not provided with a diaphragm, but the foam stock solution and fire extinguishing water have different specific gravities, so both are separated into the upper layer and the lower layer and mixed in the tank There is nothing. In this type of foam fire extinguishing equipment, as described above, a foam stock solution tank without a diaphragm is usually used. Therefore, in the following, when simply referred to as a “foam stock solution tank”, a “foam stock solution tank without a diaphragm” is referred to. Shall be referred to. The foam discharge test of this foam fire extinguishing equipment is performed as follows.

(1) After all the foam concentrate is extracted from the foam concentrate tank and stored in a holding drum, the tank is filled with water. The amount of the foam stock solution is, for example, 2000 liters to 6000 liters.
(2) Immediately before the start of the test, the tank is filled with the foam stock solution necessary for the test. The filling amount is, for example, 200 liters to 600 liters. At this time, since the specific gravity of the foam stock solution is larger than that of the fire extinguishing water, the foam stock solution sinks downward into the tank and becomes two layers.

(3) Open the mixer main valve and conduct the foam release test. This test examines whether the mixing ratio of the fire extinguishing water and the foam stock solution released is a design value, for example, the ratio of the foam stock solution is 3% to 6%. (4) After the test is completed, the main valve is closed, the mixed water of the fire extinguishing water and the foam stock solution in the tank is collected in a waste drum, and the inside of the foam stock tank is cleaned and dried.
(5) Fill the foam stock solution tank with the foam stock solution of the holding drum can and restore it.

The conventional example has the following problems.
(1) Since the work of putting in and taking out the foam stock solution into the foam stock solution tank is required for each test, the setup work and the restoration work are very troublesome.
(2) The setup work and the recovery work take a long time, for example, about two days, and the foam extinguishing equipment cannot be used from the start to the end of the test.

(3) After completion of the test, the mixed solution of the fire extinguishing water and the foam stock solution remaining in the tank must be treated as industrial waste.
(4) Since the foam stock solution is taken in and out of the tank for each test and comes into contact with air, the service life is shortened.

  This invention is aimed at shortening of the time which a bubble discharge test requires in view of the said situation. Another purpose is to prevent industrial waste from being generated by the foam release test and to prevent the life of the foam stock solution from being shortened.

The present invention relates to a pressure proportion type foam fire extinguishing equipment that introduces fire fighting water into a foam stock solution tank containing a foam stock solution through a water conduit, presses the foam stock solution, and pumps the foam stock solution to a mixer; A test tank having a diaphragm for partitioning the foam stock solution chamber and the fire fighting water chamber , a foam stock solution communication pipe connecting the foam stock solution chamber and the foam stock solution tank, and connecting the fire fighting water chamber and the water conduit. and fire extinguishing water communication pipe, a foam discharge testing device that features; the bottom of the foam concentrates chamber, level gauge to check the loading of foam concentrates of the foam chamber communicates with said mixing downstream of the extinguishing pipe vessel, characterized that you have a test connection fire hose is connected is provided at the foam discharge test.

The test tank according to the present invention is mounted on an automatic moving device with a drive source .

The present invention relates to a pressure proportion type foam fire extinguishing equipment that introduces fire fighting water into a foam stock solution tank containing foam stock solution through a water conduit, presses the foam stock solution, and pumps the foam stock solution to a mixer. A method for performing a foam release test using the foam release test apparatus according to claim 1; a step of connecting the foam stock solution chamber of the foam release test apparatus and the foam stock solution tank; A step of connecting the water conduit; a step of connecting a fire hose having a foam nozzle at a tip to a test connection provided in a fire extinguishing pipe on the downstream side of the mixer; And a step of allowing the fire extinguishing water in the water pipe to flow out only to the fire extinguishing water communication pipe .

  Since the present invention is configured as described above, when the fire extinguishing water in the water conduit is allowed to flow only into the fire-extinguishing water communication pipe, the diaphragm in the test tank is pushed, and the foam stock solution in the foam stock solution chamber becomes the foam stock solution communication pipe. The foam stock solution tank flows into the foam stock solution tank, and the foam stock solution in the stock solution tank is pumped to the mixer.

At this time, fire extinguishing water does not flow into the foam stock solution tank, so that only the foam stock solution is contained in the foam stock solution tank. Therefore, unlike the conventional example, it is not necessary to dispose of the liquid in the foam stock solution tank after the test. In addition, unlike the conventional example, it is not necessary to put and remove the foam stock solution into and from the foam stock tank for each test, so the test time can be shortened and the life of the foam stock solution is shortened because the foam stock solution does not come into contact with the atmosphere. Can be prevented.
Furthermore, since the test can be performed without removing the foam stock solution, even if a fire occurs during the test, the foam fire extinguishing equipment can be used immediately, so that fire fighting activities are not hindered.

  Conventionally, in order to solve the above problems, a small-capacity test foam stock solution tank is added to an existing mixing device, and the foam stock solution in the test foam stock solution tank is transferred to the mixer by switching valves. There was an idea that a foam release test could be performed if pumped.

  However, in this method, since the test stock solution foam tank has the same structure as the foam stock solution tank of the foam fire extinguishing equipment, a mixed liquid of fire extinguishing water and foam stock solution exists in the test stock solution foam tank. Therefore, after completion of the test, the mixed solution remaining in the test stock solution foam tank must be disposed of as industrial waste.

  The stock solution piping around the mixer is generally an SGP black tube, and rust is likely to occur due to secular change. However, since this undiluted solution pipe is not used during the test, if the foam fire extinguishing equipment is activated in the event of a fire, the rust of this undiluted solution pipe will peel off and flow into the mixer, which may cause clogging. May come.

  Therefore, the present inventor repeated research experiments in order to solve the above problems, and as a result, the inside of the test tank was divided into a fire extinguishing water chamber and a foam stock solution chamber by a diaphragm, and the fire extinguishing water chamber was used as a water conduit of the mixer. It has been found that the test can be easily performed by connecting the foam stock solution chamber to the foam stock solution tank.

  During the bubble release test, the fire-extinguishing water chamber is connected to the water conduit through the fire-extinguishing water communication pipe, and the fire water flowing into the water conduit flows only into the fire-extinguishing water chamber and presses the diaphragm. The foam stock solution chamber is connected to the secondary side of the gate valve of the water conduit or the foam stock solution tank via the foam stock solution communication pipe.

  As the diaphragm, a bladder formed of an elastic member such as rubber, or a planar membrane-like diaphragm is used. Also, the foam release test apparatus can be connected to the foam fire extinguishing equipment only during the test, or can be always connected.

A first embodiment of the present invention will be described with reference to FIG.
The pressure proportion type foam fire extinguishing equipment 100 includes a foam stock solution tank 101 in which the protein foam stock solution G is stored, a mixer 102 for mixing the fire water and the foam stock solution, and a fire pump 103 that supplies the fire water to the fire extinguishing pipe 90. A water guide pipe 104 for introducing fire extinguishing water into the foam stock solution tank 101, a gate valve 105 for the water guide pipe 104, a liquid guide pipe 106 for introducing the foam stock solution in the foam stock solution tank 101 into the mixer 102, and a foam stock solution And a gate valve (drain valve) 107 provided at the bottom of the tank 101.

  In the foam extinguishing equipment 100, when the pump 103 is activated in the event of a fire, the fire extinguishing water W is supplied to the fire extinguishing pipe 90, flows into the foam stock solution tank 101 through the water conduit 104, and presses the foam stock solution G. Therefore, the foam stock solution G is pushed out to the mixer 102 through the liquid guide tube 106 to become a mixed solution WG, and is pumped to the terminal foam extinguishing device 111.

  The foam stock solution tank 101 is not provided with a diaphragm, but the fire extinguishing water W and the foam stock solution G are separated into two layers due to the difference in specific gravity, so that the diaphragm is unnecessary.

  The foam release test apparatus 10 includes a test tank 9. The tank 9 is placed on an automatic movement device with a drive source 8, for example, a caterpillar 7. The inside of the tank 9 is divided into a foam stock solution chamber 6 and a fire extinguishing water chamber 5 by a diaphragm M. The foam stock solution chamber 6 contains a protein foam stock solution in an amount necessary for the test, for example, 200 L to 400 L. G is filled.

  The bottom side of the foam stock solution chamber 6 is connected to the water conduit 104 via the foam stock solution communication pipe 13. The foam stock solution communication pipe 13 is connected to the secondary side of the gate valve 105 of the water conduit 104, and both ends thereof are connected to the connection valve V13. The bottom side of the foam stock solution chamber 6 communicates with the level gauge 11 via the gate valve V11.

  The fire-extinguishing water chamber 5 is connected to the water conduit 104 via the fire-extinguishing water communication pipe 12. The fire-extinguishing water communication pipe 12 is connected to the primary side of the gate valve 105, and the water conduit 104 side is connected to the connection valve V12.

  A test connection 4 is provided on the fire extinguishing pipe 90 on the downstream side of the mixer 102, and a test gate valve V 4 is provided on the downstream side thereof. A fire hose 108 is connected to the connection 4 at the time of the test, and a foam nozzle 109 is provided at the tip of the hose 108.

Next, the operation of this embodiment will be described.
The fire extinguishing water communication pipe 12 and the foam stock solution communication pipe 13 of the foam discharge test device 10 are connected to the primary and secondary connection valves V12 and V13 of the gate valve 105 of the water conduit 104, respectively, and the test connection 4 is fire-fighted. Connect the hose 108.

  Next, the gate valve 105 is closed and the connection valves V12 and V13 are opened. When the fire-extinguishing water pump 103 is activated and the fire-extinguishing water W is supplied into the fire-extinguishing pipe 90, the fire-extinguishing water W flows into the fire-extinguishing water chamber 5 of the test tank 9 through the fire-extinguishing water communication pipe 12. Therefore, the foam stock solution G in the foam stock solution chamber 6 is pressed.

  Therefore, the foam stock solution G flows into the water conduit 104 through the foam stock solution communication tube 13 and is discharged into the foam stock solution tank 101 from the discharge port 104 a of the water conduit 104.

  When the foam stock solution tank 101 is pressurized, the foam stock solution G in the tank 101 is sent to the mixer 102 via the liquid conduit 106 and mixed with the fire-extinguishing water W to become a mixed solution WG. This mixed liquid WG is pumped to the foam nozzle 109 via the fire hose 108 and discharged from the nozzle 109 in a foam state. This released foam is inspected with a foam tester to check the mixing ratio of the foam stock solution.

  After the bubble release test is completed, the fire pump 103 is stopped and the supply of the fire water W is stopped. The valves V12, V13, V4 are closed, the fire-extinguishing water communication pipe 12 and the foam stock solution communication pipe 13 are removed from the water conduit 104, and the fire hose 108 is removed from the test connection 4. Then, the gate valve 105 is opened and recovered.

As a result, the amount of the foam stock solution used in the foam release test coincides with the amount of the foam stock solution extruded from within the foam release test apparatus 10, so that it is not necessary to fill the foam stock solution in the foam stock tank 101. The setup and restoration work becomes very easy.
Further, in the case of retesting, the foam release test apparatus 10 may be filled with a foam stock solution, and the filling amount can be confirmed with the level gauge 11.

A second embodiment of the present invention will be described with reference to FIG. 2. The same reference numerals as those in FIG. 1 have the same names and functions.
The difference between this embodiment and Embodiment 1 is that instead of connecting the foam stock solution communication pipe 13A to the water conduit 104, it is connected to a gate valve (drain valve) 107 at the bottom of the foam stock solution tank 101. Since the operation of the second embodiment is the same as that of the first embodiment, the description thereof is omitted.

  The embodiment of the present invention is not limited to the above. For example, instead of placing the foam release test apparatus 10 on the automatic movement apparatus 7 and making it movable, the apparatus 10 is arranged in the vicinity of the foam stock solution tank 101. And used as a dedicated foam release test apparatus for the foam stock solution tank 101.

It is a front view which shows Example 1 of this invention. It is a front view which shows Example 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Diaphragm 6 Fire extinguishing water chamber 9 Test tank 10 Foam discharge | emission test apparatus 12 Fire extinguishing water communication pipe 13 Foam stock solution communication pipe 100 Foam extinguishing equipment 101 Foam stock solution tank 102 Mixer 104 Water conduit 105 Gate valve 106 Fluid conduit 107 Gate valve

Claims (3)

In a pressure proportion type foam fire extinguishing equipment that introduces fire extinguishing water into a foam stock solution tank containing a foam stock solution through a water conduit, presses the foam stock solution, and pumps the foam stock solution to a mixer;
A test tank having a diaphragm for partitioning the foam stock solution chamber and the fire fighting water chamber , a foam stock solution communication pipe connecting the foam stock solution chamber and the foam stock solution tank, and connecting the fire fighting water chamber and the water conduit. and fire extinguishing water communication pipe, a foam discharge testing device that features;
A level gauge for confirming the filling amount of the foam stock solution in the foam stock solution chamber communicates with the bottom of the foam stock solution chamber,
The fire-fighting pipe on the downstream side of the mixer is provided with a test connection to which a fire hose is connected during a foam-release test. 2. The foam discharge test apparatus according to claim 1 , wherein the test tank is mounted on an automatic moving device with a drive source . Foam release test of pressure proportion type foam fire extinguishing equipment that introduces fire extinguishing water into the foam stock solution tank containing the foam stock solution through the water conduit, presses the foam stock solution, and pumps the foam stock solution to the mixer. A method for performing the foam release test apparatus according to claim 1;
Connecting the foam stock solution chamber of the foam release test apparatus and the foam stock solution tank;
Connecting the fire-extinguishing water chamber and the water conduit;
Connecting a fire hose having a foam nozzle at a tip to a test connection provided in a fire extinguishing pipe on the downstream side of the mixer;
Operating the gate valve and allowing the fire extinguishing water in the water conduit to flow out only to the fire extinguishing water communication pipe;
Foam release test method characterized in that comprises a.

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