JP2008086681A - Foam discharge testing device and foam discharge testing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foam discharge testing device and a foam discharge testing method by which the time and labor for the foamg discharge test of a foam fire extinguishing equipment is eliminated, the cost for an inspection is inexpensive, and the possibility of contaminating environment is small. <P>SOLUTION: The foam discharge testing device includes a foam test tank 10 for storing an agent T for the inspection separately from an undiluted solution storage tank 1 for storing a foam extinguishing undiluted solution E. Pressure resistant hoses 9, 11 for introducing water from a water guide tube 3 to the foam test tank 10 and supplying by pressure the agent T for the inspection to a mixer 2 are removably connected to opening/closing valves 6a, 8a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a foam release test apparatus and a foam release test method for performing a foam release test of a foam fire extinguishing equipment.

  2. Description of the Related Art Conventionally, there is known a foam fire extinguishing facility in which a foam extinguisher stock solution and water are mixed with a mixer, and foamed and discharged (for example, Patent Document 1 and Patent Document 2). As shown in FIG. 3, this fire extinguishing equipment includes a stock solution storage tank 92 that stores a foam extinguishing agent stock solution 91, and introduces water into the stock solution storage tank 92 through an inflow pipe 94 branched from the water conduit 93. Thus, the foam extinguisher stock solution 91 is pushed out and sent to the mixer 96 through the outflow pipe 95 (because the specific gravity of the foam extinguisher stock solution 91 is different from that of water, it is separated and not mixed with each other). Since the mixer 96 has an orifice structure, the foam extinguisher stock solution pumped to the mixer 96 is mixed with water flowing through the water conduit 93, and fire-extinguishing bubbles are discharged from the nozzle 97.

In this foam fire extinguishing equipment, it is obliged for the manager of the facility to regularly inspect whether the performance of the equipment is properly maintained. For this reason, in the past, water was actually introduced from the water conduit 93 into the stock solution storage tank 92 via the inflow tube 94 to release bubbles, and the foaming status, the mixing ratio of water and foam extinguishing agent stock solution, etc. were confirmed. The way was done.
JP 2001-573 A JP 2005-334672 A

  However, in the periodic inspection of the fire extinguishing equipment, in order to drive the entire fire extinguishing equipment, it takes a lot of time and effort for the preliminary setup work and restoration work by the workers. In addition, replenishment of the foam extinguisher consumed for the inspection, waste liquid treatment of the released foam extinguisher and processing of the foam are expensive. Furthermore, depending on the structure of the stock solution storage tank, since water is mixed in the foam extinguisher stock solution, it is necessary to replace all the foam stock solution in the stock solution storage tank.

  The present invention has been made in view of the above-described conventional circumstances, and does not require time and effort for the foam discharge test of the foam fire extinguishing equipment, the cost required for inspection is low, and there is little risk of polluting the environment. Providing a device and a foam release test method is a problem to be solved.

The foam release test apparatus of the present invention is for conducting a foam release test in a foam extinguisher equipment in which water is introduced from a water conduit into a stock solution storage tank for storing a foam extinguisher stock solution, and the foam extinguisher stock solution is pumped to a mixer. A foam release test apparatus comprising:
It is provided with a foam test tank for storing inspection chemicals, and a bypass flow path is provided for introducing water from the water conduit into the foam test tank and pumping the inspection chemicals to the mixer. It is characterized by.

The foam release test apparatus of the present invention is provided with a foam test tank for storing an inspection medicine separately from the stock solution storage tank, and water is introduced from the water conduit into the foam test tank to mix the inspection medicine. A bypass flow path is provided for pressure feeding. For this reason, at the time of a foam discharge test, by introducing water into the foam test tank from the water conduit, the foam release test can be performed without using the foam extinguisher stock solution in the stock solution storage tank. For this reason, it is not necessary to replace the foam extinguisher stock solution in the stock solution storage tank every time the foam release test is performed.
In addition, since the tank for the foam test only needs to have a capacity necessary for the foam release test, it can be reduced in size and weight. For this reason, the operator's prior setup work accompanying the bubble release test is reduced, and the number of necessary workers can be reduced.
Furthermore, in the foam release test, the foam release test other than the test for examining the fire extinguishing performance of the foam extinguishing agent does not need to be a foam extinguishing agent and can be used as an inspection agent. It is possible to avoid troublesome waste liquid processing and foam processing by appropriately selecting a chemical for inspection with a small load.

  Therefore, according to the foam emission test apparatus of the present invention, it is possible to provide a foam emission test apparatus that does not require time and effort for the foam emission test of the foam fire extinguishing equipment, has low cost for inspection, and has a low risk of polluting the environment. Can do.

  In the foam release test apparatus of the present invention, it is preferable that a diaphragm for preventing mixing of water flowing from the water conduit and the inspection chemical is provided. In this way, even if the introduction of water from the water conduit to the foam test tank is interrupted, the water introduced from the water conduit does not mix with the chemical for inspection, and only the inspection chemical is reliably supplied to the mixer. Can be pumped. For this reason, the mixing ratio in the foam release test can be measured more accurately. As such a diaphragm, for example, an inspection chemical can be filled in a container capable of contraction and expansion accommodated in a foam test tank, and this container can be used as the diaphragm. If it is like this, since the chemical | medical agent for an inspection can be interrupted | blocked from air, the chemical | medical agent for an inspection becomes difficult to change and it can prolong the service life.

  Moreover, it is also preferable that the inspection chemical has a foaming performance substantially equivalent to the foam extinguishing agent stock solution and is composed of biodegradable components. If the inspection chemical has substantially the same foaming performance as the foam extinguisher stock solution, the foaming ratio in the foam release test can be accurately performed. In addition, by using biodegradable components (for example, natural surfactants) for inspection chemicals, the burden on the environment can be reduced, and the waste liquid generated in the foam release test can be easily microbially treated. be able to.

  Moreover, it is preferable that the inspection chemical has a sugar concentration substantially equal to the sugar concentration contained in the foam extinguishing agent stock solution. Sugar foam may be added to the foam extinguisher stock solution in order to increase the viscosity to facilitate foaming and to easily measure the mixing ratio with water using an optical sugar content measuring device. If the sugar concentration of the foam extinguisher stock solution is approximately equal to the sugar content of the inspection agent, the sugar content of the foam released in the foam release test will be the same as the sugar content of the foam that is actually released in the event of a fire. The reliability of the mixing ratio value obtained in the fire fighting test is further improved.

  It is also preferable that a thickener is added to the inspection chemical so as to have a viscosity substantially equal to the viscosity of the foam extinguishing agent stock solution. Since the state of foam released from the mixer is greatly affected by the viscosity of the foam extinguisher stock solution, a thickener is added to the inspection chemical so that the viscosity is approximately the same as the viscosity of the foam stock solution. By setting it, the measurement result in the bubble release test becomes more reliable.

  It is also preferable that the foam release test apparatus of the present invention be detachable from the foam fire extinguishing equipment. If this is the case, it is not necessary to secure a permanent space for the bubble emission test apparatus, so that space can be saved.

As described above, a foam fire-extinguishing test of a foam fire-extinguishing facility can be performed by the foam discharge test apparatus of the present invention. That is, the foam release test method of the present invention performs a foam release test of a foam fire extinguishing facility in which water is introduced from a water conduit into a stock solution storage tank that stores a stock solution of foam, and the foam solution is pumped to a mixer. A foam release test method for
Water is introduced into a foam test tank for storing the inspection chemical from the water conduit, and the inspection chemical is pumped to the mixer to examine the state of foam release.

  According to the foam release test method of the present invention, as described above, the foam release test is not troublesome, the cost required for inspection is low, and there is little risk of polluting the environment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
The foam emission test apparatus of Embodiment 1 is provided in a foam fire extinguishing facility. As shown in FIG. 1, the foam extinguishing equipment includes a stock solution storage tank 1 for storing a foam extinguisher stock solution E, a mixer 2 for mixing the foam stock solution E and water, and a mixer. 2 is provided with a water conduit 3 for supplying water to 2 and a nozzle 4 for discharging the liquid mixture supplied from the mixer 2 as foam. In addition to the foaming component, sugar is added to the foam extinguisher stock solution E. The water conduit 3 is connected to the nozzle 4 via the mixer 2. The mixer 2 is provided with an orifice 2 a, and an inflow pipe 5 branched from the water conduit 3 is connected to the upstream side of the mixer 2. The other end of the inflow pipe 5 is connected to be located at the upper end in the stock solution storage tank 1, and an on-off valve 5 a is provided in the middle of the inflow pipe 5. A branch pipe 6 branches off from the inflow pipe 5 upstream of the on-off valve 5 a, and an on-off valve 6 a is provided at the other end of the branch pipe 6. Further, an outflow pipe 7 is connected so as to be located at the lower end in the stock solution storage tank 1, and the other end of the outflow pipe 7 is connected to the mixer 2. An on-off valve 7 a is provided in the middle of the outflow pipe 7. A branch pipe 8 branches off from the outflow pipe 7 upstream of the on-off valve 7 a, and an on-off valve 8 a is provided at the other end of the branch pipe 8.

  The above-mentioned foam fire extinguishing equipment is equipped with a foam release test apparatus, and its configuration is as follows. That is, the pressure-resistant hose 9 is detachably connected to the on-off valve 6a, and the other end of the pressure-resistant hose 9 is connected to be positioned at the lower end in the foam test tank 10. An inspection medicine T is stored in the foam test tank 10. The inspection chemical T has a foaming performance substantially equivalent to the foam extinguisher stock solution E, and is composed of biodegradable components. By adding sugar and a thickener, the concentration and viscosity of the sugar are almost the same as the foam extinguisher stock solution E. It is considered equivalent. Moreover, the pressure | voltage resistant hose 11 is connected so that it may be located in the lower end in the foam test tank 10, and the other end of the pressure | voltage resistant hose 11 is connected to the on-off valve 8a so that attachment or detachment is possible.

Next, the effect of this foam fire extinguishing equipment and a foam discharge test apparatus will be described.
<Drive of fire extinguishing equipment>
First, driving of the foam fire extinguishing equipment will be described.
The operator confirms that the on-off valve 5a and the on-off valve 7a are in an open state and the on-off valve 6a and the on-off valve 8a are in a closed state, and then uses a pump (not shown) for supplying water to the water conduit 3. Drive. As a result, water is supplied from the water conduit 3 to the mixer 2, and part of the water is introduced into the upper end portion of the stock solution storage tank 1 via the outflow pipe 5. Here, since the specific gravity of the foam extinguishing agent stock solution E is larger than that of water, the water supplied into the stock solution storage tank 1 is stored in a state of floating on the foam extinguishing agent stock solution E, and the volume of the stored water. Foam extinguisher stock solution E is fed by pressure to mixer 2 via outflow pipe 7. That is, the water from the water conduit 3 and the foam extinguisher stock solution E from the stock solution storage tank 1 are supplied to the mixer 2 and mixed to form a mixed solution. Further, the liquid mixture is discharged as bubbles from the nozzle 4.

<Driving of foam release test device>
Next, a case where a foam release test is performed will be described.
The operator of the bubble release test first closes the on-off valve 5a and the on-off valve 7a and opens the on-off valve 6a and the on-off valve 8a. Then, a pump for supplying water to the water conduit 3 is driven. As a result, water is supplied from the water conduit 3 to the mixer 2, and a part of the water flowing through the water conduit 3 passes through the branch pipe 6, and further through the on-off valve 6 a and the pressure hose 9, the foam test tank. 10 is stored in a state where water is floated on the inspection medicine T, and the inspection medicine T having only its volume is pumped to the mixer 2 via the pressure hose 11. In this way, the water from the water conduit 3 and the inspection chemical T from the foam test tank 10 are supplied to the mixer 2, mixed into a mixed solution, and discharged from the nozzle 4 as bubbles. The bubbles thus released are collected, and the foaming ratio is obtained by measuring the weight and volume. Further, after waiting for the released bubbles to disappear, the sugar content is measured by a saccharimeter, and the mixing ratio of the inspection drug T and water is determined from the measured value.

As described above, in this foam release test apparatus, the inspection drug T is pumped to the mixer 2 by introducing a part of the water flowing through the water conduit 3 into the foam test tank 10. The foam release test can be conducted without using the foam extinguishing agent stock solution E in 1 at all. For this reason, it is not necessary to replace the foam extinguisher stock solution E in the stock solution storage tank 1 every time the foam release test is performed.
Moreover, since the capacity | capacitance of the tank 10 for foam tests should just be a capacity | capacitance required for a foam discharge | release test, size reduction and weight reduction are possible. For this reason, the operator's prior setup work accompanying the bubble release test is reduced, and the number of necessary workers can be reduced. For this reason, the foam discharge test of the foam fire-extinguishing equipment is not time-consuming and the cost required for inspection is low.

  Note that the foam test tank 10 and the pressure-resistant hoses 9 and 11 may be prepared only when the foam release test is performed, and may be used by being connected to a foam fire extinguishing facility. In this way, it is not necessary to secure a permanent space for the bubble emission test apparatus, and thus space saving can be achieved. In this case, it is more convenient if the foam test tank 10 and the pressure-resistant hoses 9 and 11 are mounted on the vehicle and conveyed to the foam fire extinguishing equipment during the foam release test.

  In addition, since the inspection chemical T has a foaming performance substantially equivalent to that of the foam extinguishing agent stock solution E and has a viscosity substantially equal to that of the foam extinguishing agent stock solution by adding a thickener, the expansion ratio and foam extinguishing Measurements of drug concentration and the like can be accurately performed, and conventionally used measuring instruments can be used as they are. Further, since the foaming component is also composed of a biodegradable component, the burden on the environment can be reduced, and the waste liquid generated in the foam release test can be easily microbially treated. In addition, since the sugar concentration is almost the same as the foam extinguisher stock solution E, the mixing ratio in foam release can be measured easily and accurately by measuring the sugar content of the foam released with an optical sugar content measuring device. can do.

(Embodiment 2)
As shown in FIG. 2, the foam release test apparatus of the second embodiment has a double structure in which a container 21 made of polyethylene that can be contracted and expanded is accommodated in a foam test tank 20. The container 21 is filled with the inspection medicine T. Other configurations are the same as those of the foam emission test apparatus of the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

The method of performing the foam release test by the foam release test apparatus of the second embodiment is the same as that of the first embodiment, and the operator first closes the on-off valve 5a and the on-off valve 7a, and then opens the on-off valve 6a and the on-off valve. 8a is opened. Then, by driving a pump for supplying water to the water conduit 3, a part of the water flowing through the water conduit 3 is introduced into the foam test tank 10. The water thus introduced into the foam test tank 10 presses the container 21, and the inspection chemical T is pumped to the mixer 2 via the pressure hose 11. For this reason, the water introduced from the water conduit 3 is not mixed with the inspection medicine T, and only the inspection medicine T can be reliably pumped to the mixer. For this reason, the mixing ratio in the foam release test can be measured more accurately. Moreover, since the inspection chemical | medical agent T is filled in the container made from NBR (acrylonitrile rubber | gum), it is interrupted | blocked from the air, there is almost no quality change of the inspection chemical | medical agent T, and a useful life becomes long.
Other functions and effects are the same as those of the first embodiment.

  The present invention is not limited to the description of the embodiments of the above invention. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

  The present invention can be suitably used for a foam discharge test of a foam fire extinguishing facility.

It is a schematic diagram of a foam extinguishing equipment and the foam discharge test apparatus of Embodiment 1. It is a schematic diagram of a foam extinguishing equipment and the foam discharge test apparatus of Embodiment 2. It is a schematic diagram of a foam fire extinguishing equipment.

Explanation of symbols

E ... Foam extinguisher stock solution 1 ... Stock solution storage tank 3 ... Conduit 2 ... Mixer T ... Inspection chemical 6, 6a, 9, 11, 8a, 8 ... Bypass channel (6 ... Branch pipe, 6a ... Open / close valve, 9, 11 ... pressure hose, 8a ... on-off valve, 8 ... branch pipe)
21 ... Diaphragm (container)

Claims (9)

In a foam extinguishing facility for introducing water from a water conduit into a stock solution storage tank for storing a foam extinguisher stock solution and pumping the foam extinguisher stock solution to a mixer, a foam release test apparatus for performing a foam release test,
It is provided with a foam test tank for storing inspection chemicals, and a bypass flow path is provided for introducing water from the water conduit into the foam test tank and pumping the inspection chemicals to the mixer. A foam release test apparatus characterized by. The foam discharge test apparatus according to claim 1, further comprising a diaphragm for preventing mixing of water flowing from the water conduit and the inspection chemical. 3. The foam release test apparatus according to claim 2, wherein the inspection chemical is filled in a container capable of contraction and expansion accommodated in a foam test tank. The foam release test apparatus according to any one of claims 1 to 3, wherein the inspection chemical has a foaming performance substantially equivalent to a foam extinguishing agent stock solution and comprises a biodegradable component. The foam release test apparatus according to any one of claims 1 to 4, wherein the inspection chemical has a sugar concentration substantially equal to a sugar concentration contained in the foam extinguishing agent stock solution. The foam release test apparatus according to any one of claims 1 to 5, wherein a thickener is added to the inspection chemical so as to have a viscosity substantially equal to that of the foam extinguishing agent stock solution. The foam emission test apparatus according to any one of claims 1 to 6, wherein the apparatus is detachable from the foam fire extinguishing equipment. The foam discharge test apparatus according to claim 1, wherein the foam discharge test apparatus is capable of being conveyed. A foam release test method for carrying out a foam release test of a foam fire extinguishing equipment that introduces water from a water conduit into a stock solution storage tank for storing a foam extinguisher stock solution and pumps the foam stock solution into a mixer,
A foam release test method characterized in that water is introduced from a water conduit into a foam test tank for storing an inspection chemical, and the inspection chemical is pumped to the mixer to check the state of foam release.

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