JP2016150030A - Fire-extinguishing foam mixing method of foam fire extinguishing equipment and fire-extinguishing foam mixing system of foam fire extinguishing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the diameter of a pipe and reduce the size of a mixing device even in a foam fire extinguishing system with a large use flow rate, improve workability, save space, reduce costs, and is called a low concentration type. A foam extinguishing agent mixing method for a foam extinguishing equipment and a foam extinguishing agent mixing system for a foam extinguishing equipment suitable for mixing foam extinguishing agents are obtained. SOLUTION: A foam extinguishing agent mixing method and a mixing system in which a mixing device 5 is provided in the middle of a water supply pipe 4 and a foam extinguishing agent is injected into running water to generate an aqueous foam solution. One water supply pipe 4a is branched, one is a primary pipe 6 of the mixing device 5 and the other is a bypass pipe 7 that bypasses the mixing device 5, and a secondary pipe 8 disposed on the secondary side of the mixing device 5 and A liquid mixture produced by connecting the end of the bypass pipe 7 and the water supply pipe 4b on the secondary side of the mixing apparatus 5 and water flowing through the primary side pipe 6 and the foam extinguishing agent sucked by the mixing apparatus 5; The water flowing through the bypass pipe 7 was combined with the water supply pipe 4b on the secondary side for dilution to produce a foam aqueous solution having a predetermined mixed concentration. [Selection] Figure 1

Description

  The present invention provides a mixing device that sucks a foam fire-extinguishing agent in the middle of a water pipe, press-fits it into running water and mixes it, and presses the foam-extinguishing agent into running water to produce a foam aqueous solution having a predetermined mixed concentration. The present invention relates to a foam extinguishing agent mixing method for equipment and a foam extinguishing agent mixing system for foam extinguishing equipment.

As a fire extinguishing facility in a tank storage for storing flammable liquids such as oil, air is mixed with an aqueous foam solution mixed with foam fire extinguishing agent and water, stirred and foamed to produce fire extinguishing foam. There is a bubble extinguishing system that covers the flame and extinguishes fire by blocking the flame and oxygen from the outside air.
The foam fire extinguishing equipment is equipped with a foam fire-extinguishing agent mixing system that mixes foam-extinguishing agent and water at a predetermined mixing ratio to generate a foam aqueous solution with a predetermined mixed concentration. There are known methods such as a liner method, a pump proportioner method, a pressure side proportioner method, and a line proportioner method. (See, for example, publicly known document 1).

March 2008, issued by Japan Fire Extinguishing Equipment Industry Association, “Foam / water spray fire extinguishing equipment design and construction standards”, pages 37-39

However, in the conventionally known foam fire-extinguishing chemical mixing system, the pipe diameter of the foam fire-extinguishing chemical mixing system is enlarged according to the flow rate used in the foam fire extinguishing equipment, and the mixing device is also enlarged. For this reason, when the flow rate used is large, the difficulty of construction of the foam fire-extinguishing agent mixing system increases due to the expansion of the pipe diameter and the enlargement of the mixing device, which requires a large space and further increases the cost. There is a problem that cannot be avoided.
In addition, water and foam are mixed at a predetermined mixing rate. However, foam and fire-extinguishing agents and water are expected to change in viscosity due to changes in environmental temperature. In some cases, the range of the mixing ratio is set, for example, 6.0% to 8.0% for the 6% type (mixing ratio 6%) and 3.0% for the 3% type (mixing ratio 3%). It is set to 1.0 to 1.3% in a range of ˜4.0%, 1% type (mixing ratio 1%). However, there is a problem that mixing of a foam extinguishing agent generally called a low concentration type such as a 1% mixing rate type has a narrow mixing rate range, and mixing within the mixing rate range is very difficult.

  The object of the present invention is to reduce the diameter of the pipe and the size of the mixing device even in the foam fire extinguishing equipment with a large flow rate, and improve the workability, space saving, cost reduction, and low concentration type An object of the present invention is to provide a method for mixing foam fire extinguishing chemicals suitable for mixing foam fire extinguishing chemicals, and a foam extinguishing chemical mixing system for foam fire extinguishing equipment.

  In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a mixing device that sucks the foam fire-extinguishing agent in the middle of the water pipe and press-fits it into the running water, and presses the foam-extinguishing agent into the running water. A foam extinguishing agent mixing method for a foam extinguishing facility that generates a foam aqueous solution having a predetermined mixed concentration, wherein a water supply pipe on the primary side of the mixing device is branched, and one side is used as a primary side piping of the mixing device, and the other side. A bypass pipe bypassing the mixing device, connecting a secondary side pipe disposed on the secondary side of the mixing device and an end of the bypass pipe and a water supply pipe on the secondary side of the mixing device, A high-concentration mixed liquid is generated from the water flowing through the primary pipe of the mixing apparatus and the foam extinguisher sucked by the mixing apparatus, and is sent out from the secondary pipe of the mixing apparatus. Liquid and water flowing through the bypass pipe are mixed. Is the confluence in the water pipe on the secondary side is diluted, and generating a foam an aqueous solution of a predetermined mixing concentrations.

According to the first aspect of the present invention, the water flowing through the primary side water supply pipe is branched at the primary side of the mixing device and flows through the primary side piping and the bypass pipe of the mixing device. The amount of water flowing through the side pipe and the bypass pipe is reduced, and accordingly, the diameter of the primary side pipe and the bypass pipe of the mixing device can be reduced and the size of the mixing device can be reduced, improving workability and saving space. Cost reduction can be achieved.
Furthermore, the liquid mixture generated by the water flowing through the primary side pipe of the mixing apparatus, the foam extinguishing agent sucked by the mixing apparatus, and the water flowing through the bypass pipe are sent to the secondary side of the mixing apparatus. The amount of water flowing through the primary side piping of the mixing device and the foam extinguishing agent sucked in the mixing device in advance so that the aqueous foam solution formed by diluting by joining with the water pipe has a predetermined mixed concentration By setting the mixing ratio and the mixing ratio of the generated mixed liquid and the water flowing through the bypass pipe, it is possible to easily generate a foam aqueous solution having a predetermined mixed concentration.
In particular, the water flowing through the primary side pipe of the mixing device and the foam extinguishing agent sucked by the mixing device are mixed at a mixing rate higher than a predetermined mixing rate, and then the water flowing through the bypass pipe is added to the mixed solution. Since the foam aqueous solution having a predetermined mixing ratio is produced by mixing, it is possible to easily mix the foam extinguishing agent called a low concentration type, which has been difficult in the conventional foam extinguishing agent mixing system.

  The invention according to claim 2 is provided with a mixing device that sucks the foam fire-extinguishing agent in the middle of the water pipe, press-fits it into the running water, and mixes the foam with the foam-extinguishing agent in the running water. A foam-extinguishing chemical mixing system for a foam-extinguishing facility that produces a water-supply pipe on the primary side of the mixing apparatus, one of which is a primary pipe of the mixing apparatus, and the other is a bypass pipe that bypasses the mixing apparatus And connecting a secondary side pipe disposed on the secondary side of the mixing device and an end of the bypass pipe to a water supply pipe on the secondary side of the mixing device, and flowing through the primary side pipe of the mixing device. The liquid mixture generated with water and the foam extinguisher sucked by the mixing device and the water flowing through the bypass pipe are diluted by joining with a water supply pipe on the secondary side of the mixing apparatus, and a predetermined mixing concentration It is characterized by generating a foam aqueous solution of

According to the invention described in claim 2, since the water flowing through the primary side water supply pipe is branched at the primary side of the mixing apparatus and flows through the primary side piping and the bypass pipe of the mixing apparatus, the primary of the mixing apparatus The amount of water flowing through the side pipe and the bypass pipe is reduced, and accordingly, the diameter of the primary side pipe and the bypass pipe of the mixing device can be reduced and the size of the mixing device can be reduced, improving workability and saving space. Cost reduction can be achieved.
Furthermore, the liquid mixture generated by the water flowing through the primary side pipe of the mixing apparatus, the foam extinguishing agent sucked by the mixing apparatus, and the water flowing through the bypass pipe are sent to the secondary side of the mixing apparatus. The amount of water flowing through the primary side piping of the mixing device and the foam extinguishing agent sucked in the mixing device in advance so that the aqueous foam solution formed by diluting by joining with the water pipe has a predetermined mixed concentration By setting the mixing ratio and the mixing ratio of the generated mixed liquid and the water flowing through the bypass pipe, it is possible to easily generate a foam aqueous solution having a predetermined mixed concentration.
In particular, the water flowing through the primary side pipe of the mixing device and the foam extinguishing agent sucked by the mixing device are mixed at a mixing rate higher than a predetermined mixing rate, and then the water flowing through the bypass pipe is added to the mixed solution. Since the foam aqueous solution having a predetermined mixing ratio is produced by mixing, it is possible to easily mix the foam extinguishing agent called a low concentration type, which has been difficult in the conventional foam extinguishing agent mixing system.

  A third aspect of the invention is characterized in that the primary side piping and the bypass pipe of the mixing device according to the second aspect are provided with flow rate adjusting means, respectively.

  According to invention of Claim 3, since the flow control means is provided in the primary side piping of the said mixing apparatus and the said bypass pipe, respectively, the flow volume of the primary side piping of the said mixing apparatus and the said bypass pipe is adjusted. By adjusting, the mixing rate of water and a foam extinguishing agent can be adjusted.

  According to a fourth aspect of the present invention, the mixing device according to any one of the second or third aspect, wherein the mixing device sucks in accordance with a mixing ratio of water flowing through the primary side pipe and a foam extinguishing agent. It is characterized by comprising a foam extinguishing chemical suction adjusting means for adjusting a chemical suction amount.

  According to invention of Claim 4, the said mixing apparatus adjusts the foaming-extinguishing agent suction adjustment which adjusts the suction amount of the foaming agent sucked according to the mixing rate of the water and foam extinguishing agent which flow through the said primary side piping. Since the means is provided, the mixing ratio from the high concentration region to the low concentration region can be easily adjusted.

  According to the foam-extinguishing agent mixing method of the foam-extinguishing equipment and the foam-extinguishing agent-mixing system of the foam-extinguishing equipment according to the present invention, it is possible to reduce the diameter of the primary side pipe and the bypass pipe of the mixing device and to reduce the size of the mixing device. Therefore, it is possible to improve workability, save space, and reduce costs. Furthermore, it is possible to easily generate a foam aqueous solution having a predetermined mixed concentration, and in particular, it is possible to easily mix a foam extinguishing agent called a low-concentration type, which has been considered difficult with conventional foam extinguishing agent mixing systems. it can.

It is a schematic block diagram which shows an example of embodiment of the foam fire-extinguishing chemical | medical agent mixing system of the foam fire-extinguishing equipment which concerns on this invention.

  Hereinafter, an example of an embodiment of a foam-extinguishing chemical mixing system for a foam-extinguishing facility according to the present invention will be described in detail with reference to FIG.

  The foam extinguishing agent mixing system 1 of the foam extinguishing equipment of the present example sucks the foam extinguishing agent in the middle of the water supply pipe 4 that pumps the water pumped up from the water source water tank 2 by the pump 3, and mixes by injecting into the running water. A mixing device 5 is provided, and a foam extinguishing agent is injected into running water to generate a foam aqueous solution having a predetermined mixed concentration. The water supply pipe 4a on the primary side of the mixing device 4 is branched, and one branch pipe Is the primary side pipe 6 of the mixing device 5, and the other branch pipe is a bypass pipe 7 that bypasses the mixing device 5.

  And the secondary side piping 8 arrange | positioned at the secondary side of the mixing apparatus 5 and the edge part of the bypass pipe 7, and the water supply pipe | tube 4b in the secondary side of the mixing apparatus 5 are connected, The primary side piping of the mixing apparatus 5 6 and the water mixture flowing through the bypass pipe 7 are merged in the water supply pipe 4b on the secondary side of the mixing apparatus 5 and diluted. A foam aqueous solution having a predetermined mixed concentration is generated.

  In this example, the primary side pipe 6 and the bypass pipe 7 of the mixing device 5 are provided with a flow rate adjusting means 9 for adjusting the flow rate of water flowing through the primary side pipe 6 and the bypass pipe 7. Examples of the flow rate adjusting means 9 include a constant flow rate valve, a pressure reducing valve, and an orifice.

  Further, in the mixing device 5, the foam extinguisher sucks in accordance with the mixing ratio between the suction pump 11 that sucks the foam extinguishing agent from the foam extinguishing agent storage tank 10 and the water and the foam extinguishing agent flowing through the primary pipe 6. Foam extinguishing chemical suction adjusting means 12 for adjusting the chemical suction amount is provided. Examples of the mixing device 5 provided with the foam extinguishing agent suction adjusting means 12 include a mixing device (FireDos: registered trademark) manufactured by Firedos, but are not limited thereto.

  Further, in this example, the flow rate adjusting means 9 and / or the foam extinguishing agent suction adjusting means 12 are controlled according to the desired mixing concentration of the foam aqueous solution to be generated, and the flow rate of water flowing through the bypass pipe 7 and the primary side pipe 6 Is provided with a control device 13 that adjusts the mixing ratio of the flow rate of water flowing through the water and the water bubble extinguishing agent flowing through the primary side pipe 6.

  The water supply pipe 4b on the secondary side of the mixing apparatus 5 is provided with a foaming apparatus 14 for foaming the foam aqueous solution generated by the merge of the mixed liquid generated by the mixing apparatus 5 and the water flowing through the bypass pipe 7. Yes.

According to the foam extinguishing agent mixing system 1 of the foam extinguishing equipment configured as described above, the water pumped up from the water source water tank 2 by the pump 3 and flowing through the water pipe 4a on the primary side of the mixing device 5 is mixed with the mixing device 5. The water flowing into the primary pipe 6 and the bypass pipe 7 branching to the primary pipe 6 and the bypass pipe 7 flows through the primary pipe 6 of the foam extinguishing agent sucked by the suction pump 11 by the mixing device 5. The flowing water is mixed to produce a liquid mixture having a predetermined mixing ratio.
And the liquid mixture produced | generated by the mixing apparatus 5 merges with the water which flows through the bypass pipe 7, and the water supply pipe | tube 4b in the secondary side of the mixing apparatus 5, and is diluted, and foam aqueous solution of predetermined | prescribed mixed concentration is produced | generated. .
Therefore, a mixture liquid having a higher concentration than the predetermined mixing concentration required for the foam aqueous solution is generated by the mixing device 5, and the water flowing through the bypass pipe 7 is mixed with the mixed liquid at a predetermined mixing ratio to thereby obtain a predetermined mixing ratio. A foam aqueous solution with a mixed concentration will be produced.

  For example, when a foam aqueous solution with a flow rate of 3000 l / min and a mixing concentration of 3% is generated, water at a flow rate of 2910 l / min is caused to flow through the water supply pipe 4a on the primary side of the mixing device 5 and branched to bypass pipe 7. Then, a flow rate of 1500 l / min is supplied, and 1410 l / min of water is supplied to the primary side pipe 6 of the mixing device 5. In the mixing device 5, the foam extinguishing agent having a flow rate of 90 l / min is sucked and mixed with water flowing through the primary side pipe 6. As a result, a mixed liquid having a flow rate of 1500 l / min and a mixed concentration of 6% is generated. By mixing the 6% mixed solution and the water flowing through the bypass pipe 7 by mixing, a foam aqueous solution having a flow rate of 3000 l / min and a mixing concentration of 3% is generated.

  In this example, since the flow rate adjusting means 9 for adjusting the flow rate of the water flowing through the primary side pipe 6 and the bypass pipe 7 is provided in the primary side pipe 6 and the bypass pipe 7 of the mixing device 5, the flow rate adjusting means 9. By adjusting the flow rates of the primary side pipe 6 and the bypass pipe 7 by the above, the mixing ratio of the water flowing through the primary side pipe 6 and the foam extinguishing agent sucked by the suction pump 11 in the mixing device 5 and / or the primary side pipe 6 The mixing concentration of the aqueous foam solution generated is adjusted by adjusting the mixing ratio of the mixed liquid generated by the foam extinguishing agent sucked by the suction pump 11 in the mixing device 5 and the water flowing through the bypass pipe 7. Easy to adjust.

  Moreover, in this example, the mixing apparatus 5 is a foam extinguishing agent suction adjusting means for adjusting the amount of the foam extinguishing agent sucked by the suction pump 11 in accordance with the mixing ratio of the water flowing through the primary side pipe 6 and the foam extinguishing agent. 12 so that the mixing concentration of the foam aqueous solution can be adjusted easily and accurately by adjusting the suction amount of the foam extinguishing agent, and the mixing ratio from the high concentration region to the low concentration region can be easily adjusted. Can be adjusted.

  Further, in this example, the flow rate adjusting means 9 and / or the foam extinguishing agent suction adjusting means 12 are controlled according to the desired mixing concentration of the foam aqueous solution to be generated, and the flow rate of water flowing through the bypass pipe 7 and the primary side pipe 6 Is provided with a control device 13 that adjusts the mixing ratio of the flow rate of the water flowing through and the water foam extinguishing agent flowing through the primary side pipe 6, so that the mixing concentration of the generated foam aqueous solution is extremely low without requiring a complicated operation. It can be adjusted easily and accurately.

DESCRIPTION OF SYMBOLS 1 Foam extinguishing agent mixing system 2 Water source tank 3 Pump 4 Water supply pipe 4a Water supply pipe 4b on the primary side Water supply pipe 5 on the secondary side 5 Mixing device 6 Primary side pipe 7 Bypass pipe 8 Secondary side pipe 9 Flow rate adjusting means 10 Foam Fire extinguishing agent storage tank 11 Suction pump 12 Foam extinguishing agent suction adjusting means 13 Control device 14 Foaming device

Claims (4)

A foaming fire extinguisher for foam fire extinguishing equipment that generates foam aqueous solution with a predetermined concentration by injecting foam fire-extinguishing agent into the running water by installing a mixing device that sucks foam-extinguishing agent in the middle of the water pipe and press-fits it into running water. A drug mixing method,
Branching the water supply pipe on the primary side of the mixing device, one side being a primary side piping of the mixing device, the other being a bypass pipe bypassing the mixing device, and a secondary side disposed on the secondary side of the mixing device The pipe and the end of the bypass pipe are connected to the water supply pipe on the secondary side of the mixing device, and a predetermined concentration of water flowing through the primary side piping of the mixing device and the foam extinguishing agent sucked by the mixing device A higher concentration mixed liquid is generated and sent out from the secondary side pipe of the mixing apparatus, and the high concentration mixed liquid and the water flowing through the bypass pipe are merged in the water supply pipe on the secondary side of the mixing apparatus. A foam fire extinguishing agent mixing method for a foam fire extinguishing equipment, comprising diluting to produce a foam aqueous solution having a predetermined concentration. A foaming fire extinguisher for foam fire extinguishing equipment that generates foam aqueous solution with a predetermined concentration by injecting foam fire-extinguishing agent into the running water by installing a mixing device that sucks foam-extinguishing agent in the middle of the water pipe and press-fits it into running water. A drug mixing system,
Branching the water supply pipe on the primary side of the mixing device, one side being a primary side piping of the mixing device, the other being a bypass pipe bypassing the mixing device, and a secondary side disposed on the secondary side of the mixing device The pipe and the end of the bypass pipe were connected to the water supply pipe on the secondary side of the mixing device, and generated with water flowing through the primary piping of the mixing device and the foam extinguisher sucked by the mixing device A foam extinguishing system characterized in that a mixed liquid and water flowing through the bypass pipe are combined and diluted in a water supply pipe on the secondary side of the mixing apparatus to produce a foam aqueous solution having a predetermined mixed concentration. Equipment foam extinguishing agent mixing system.   The foam extinguishing agent mixing system for a foam extinguishing facility according to claim 2, wherein a flow rate adjusting means is provided in each of the primary side pipe and the bypass pipe of the mixing device.   The said mixing apparatus is provided with the foam extinguishing agent suction adjustment means which adjusts the suction amount of the foam extinguishing agent suck | inhaled according to the mixing rate of the water and foam extinguishing agent which flow through the said primary side piping. Item 4. A foam extinguishing agent mixing system for a foam extinguishing facility according to any one of Items 2 and 3.

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