JPH10272195A - Mixer for fire extinguishing agent or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent drop in mixing ratio caused by pressure loss of a bubble solution piping, by arranging a solution tank, a solution housing film with an opening part provided in the solution tank, and a mixer integrally connected to the opening part. SOLUTION: A flexible rubber film 3 is pressurized from the perimeter of an external surface part thereof by a pressure water flowing in from a pressure feed water ports 6 and 6' to continuously push out a bubble solution stored inside from an opening part 5. Now, a data pertaining to the pressure of the pressure water with a manometer 13 is fed back to a controller 12A to properly regulate a pressure pump so that the pressure received by the rubber film 3 from the perimeter of the external surface part thereof is kept at a fixed value to allow adjusting of the pressure of a bubble solution flowing into a mixing part 5A from the opening part 5 to a fixed value. Therefore, water for extinguishing from a water supply pipe 2 is mixed with the bubble solution from the opening part 5 of the rubber film 3. This eliminates a pressure loss between the opening part 5 of the rubber film 3 and the mixing part 5A thereby enabling rise in the mixing ratio under the same flow rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing apparatus for extinguishing a fire extinguishing system, which mixes water and a fire extinguishing agent and uses it for fire extinguishing.

[0002]

2. Description of the Related Art Conventionally, a fire extinguishing system using a fire extinguishing agent or the like is schematically shown in FIG.
When a fire extinguishing operation is required, a branch pipe 2S to which a foaming device including a foam discharge head 1S installed in the area is connected.
Is opened by an interlocking control signal from a fire detector (not shown) or the like. Further, the pressurized water supply device including the pump 4S is activated, and the water source 5S
Then, supply of pressurized water to the main pipe 6S is started. A mixer 7S is provided in the middle of the main pipe 6S, and a part of the pressurized water of the main pipe 6S is diverted to form a diaphragm 9S in the foam concentrate tank 8S.
To expand the foam concentrate as a fire-extinguishing agent into the foam concentrate 10
The mixture is sent to the mixer 7S via S and mixed with the pressurized water at a predetermined ratio. The liquid mixture in a pressurized state in which the foam liquid and the water are mixed is supplied to the bubble discharge head 1S through the opened automatic valve 3S, and is foamed and discharged from the bubble discharge head 1S.

[0003]

However, in the mixing apparatus including the above-described mixer, the flow rate of the mixed liquid that can obtain a mixed liquid having a mixing ratio suitable for obtaining an appropriate foam from the foam discharging head. If the minimum flow rate is 1, the range is up to about 4.5 times in the venturi type.

Accordingly, as the number of foam discharge heads used simultaneously increases, the flow rate also increases accordingly. As a result, it is no longer possible to obtain a mixed liquid having an appropriate mixing ratio with the above-described conventional mixing apparatus. There was a limit to the number of foam discharge heads that could be installed in fire extinguishing equipment.

For this reason, the above situation has conventionally been dealt with by increasing the maximum flow rate of the mixed liquid or further reducing the minimum flow rate of the mixed liquid to widen the flow rate range.

[0006] However, further increasing the maximum flow rate is not preferable because it is expensive to scale up the equipment.

On the other hand, when the minimum flow rate is to be further reduced, for example, if a venturi type mixer is used, as shown in FIG.
/ min or less), from the foam concentrate 10S to the mixer 7S
Pressure P2 of the foam concentrate just before flowing into the mixing section and the mixer 7
Since the ratio of the pressure loss of the foam concentrate pipe to the difference from the pressure P1 at the mixing portion of S (hereinafter referred to as "generated differential pressure") increases, it is assumed that there is no pressure loss of the foam concentrate solution pipe. It will be significantly lower than the mixing ratio.

An object of the present invention is to provide a mixing device for extinguishing a fire extinguishing agent or the like for preventing a decrease in the mixing ratio due to the pressure loss of the foam liquid piping.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a stock solution tank, a stock solution storage film provided in the stock solution tank, an opening provided in the stock solution storage film, and the opening are integrally connected. It is an object of the present invention to provide a mixing apparatus for extinguishing a fire extinguishing agent or the like, characterized by having a mixer.

Further, the present invention provides a mixing apparatus for extinguishing a fire extinguishing agent liquid, comprising a stock solution tank, an opening provided in the stock solution tank, and a mixer integrally connected to the opening. It is something to offer.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

First embodiment. An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment to which the present invention is applied.

Reference numeral 1 denotes a foam concentrate tank main body, and reference numeral 2 denotes a water supply pipe. Fire extinguishing water flows through the water supply pipe 2 from right to left in the drawing. Numeral 3 is a rubber film as a flexible raw liquid containing film which is stored in the raw foam liquid tank and separates the raw foam liquid as a fire extinguishing agent and the pressurized water. A mixer 4 forms a venturi, and communicates with the opening 5 of the rubber film 3 at the maximum flow velocity position of the venturi. In this opening 5, the rubber film 3 is suspended. Reference numerals 6 and 6 ′ denote pressurized water supply ports for introducing pressurized water from the pressurized water supply pipe 17 into the foam concentrate tank main body 1 on the side surface of the foam concentrate tank main body 1. Reference numeral 7 denotes a drain port for draining pressurized water. Reference numeral 8 denotes a mounting port for an air vent valve and a pressure gauge. 9 is a foam concentrate
This is a discharge valve. Reference numeral 10 denotes a drain valve, and pressurized water is drained or held at the drain port 7 by opening and closing the valve. 1
2 is an air vent valve and 13 is a pressure gauge. 14 is the rubber film 3
This is the flange that clamps. In the flange 14, the foam stock liquid filling / discharging tube 15 and the rubber film 3 communicate with each other.
Numeral 16 denotes a foam-extinguishing mixed liquid delivery pipe, in which a foam-extinguishing mixed liquid produced by mixing the fire-extinguishing water and the foam stock solution in the mixer 4 flows through the foam-extinguishing mixed liquid sending pipe 16 from the right in the drawing. Flow left. Also, the foam extinguishing mixture delivery pipe 16
Are on a straight line together with the water supply pipe 2 via the mixer 4, and these penetrate the side surface of the foam raw liquid tank main body 1.

Although not shown, the foam concentrate tank body 1 has legs for supporting the foam concentrate tank body 1 at the lower part.

Although not shown, the mixing apparatus is provided with a liquid level gauge so that it can be measured that a prescribed amount of the foam concentrate is filled.

Next, the operation of one embodiment of the present invention will be described. First, the valve 9 for filling / discharging the foam concentrate is opened, and a pump (not shown) for sending the foam concentrate from the tube 15 for filling / discharging the foam concentrate. ) Is supplied into the rubber film 3. Next, it is confirmed by a liquid level meter (not shown) that the foam concentrate is filled in the rubber membrane 3 in a predetermined amount, and the foam concentrate filling / discharging valve 9 is closed.
Stop supplying the foam concentrate.

When the rubber film 3 is filled in a specified amount,
Is in a state of being expanded over the entire space surrounded by both the horizontal plane including the water supply pipe 2 and the foam-extinguishing mixed liquid delivery pipe 16 and the inner wall of the foam raw liquid tank main body 1 located below the horizontal plane.
Next, the flexible rubber film 3 is pressurized from around the outer surface thereof by pressurized water flowing from the pressurized water supply ports 6 and 6 ′, and the foamed liquid contained therein is continuously discharged from the opening 5. Extrude. Here, data on the pressure of the pressurized water measured by the pressure gauge 13 is fed back to the control device 12A, and a pressure pump (not shown) is appropriately adjusted so that the pressure received by the rubber film 3 from around the outer surface is reduced. With a constant value, the pressure of the foam concentrate immediately before flowing into the mixing unit 5A from the opening 5 can be adjusted to a constant value.

Therefore, the fire extinguishing water from the water supply pipe 2 and the foam concentrate from the opening 5 of the rubber film 3 are mixed in the mixing section 5A. At this time, there is no pressure loss between the opening 5 of the rubber film 3 and the mixing section 5A. Therefore, the mixing ratio at the same flow rate increases as compared with the case where there is a pressure loss in the foam liquid piping. That is, the flow rate for ensuring the same mixing ratio can be reduced.

When the minimum flow rate of the mixed liquid is set to 1 by adopting the above configuration, the flow rate range of the mixed liquid is about ten times.

In this embodiment, the foam liquid filling / discharging valve 9 is closed, the rubber film 3 is pressurized at a constant pressure, and the foam liquid contained inside is continuously pushed out from the opening 5. However, while the foaming liquid filling / discharging valve 9 is opened, the foaming liquid is supplied to the rubber film 3 at a predetermined pressure using a delivery pump (not shown), and the rubber film 3 is moved around the outer surface thereof. May be pressurized with pressurized water and continuously extruded from the opening 5. In this case as well, data on the pressure of the pressurized water measured by the pressure gauge 13 is fed back to the control device 12A, and the pressure pump (not shown) is adjusted as appropriate, so that the pressure from the opening 5 is increased. The pressure of the foam concentrate immediately before flowing into the mixing section 5A can be adjusted to a constant value. In this way, a large amount of foam concentrate can be continuously mixed using this mixing device.

Second Embodiment FIG. 2 is a drawing showing a second embodiment of the present invention.

This embodiment differs from the first embodiment in the following points.

Note that portions common to the first embodiment are denoted by the same reference numerals.

(1) The point that the mixer 4 is provided on the top 1a of the foam concentrate tank body 1.

(2) The point that the mixing section 5A of the mixer 4 and the opening 5 of the rubber film 3 communicate with each other at the top 1a.

The operation is the same as in the first embodiment, and will not be described.

In the present embodiment, since the rubber film 3 can be completely contained in the foam concentrate tank main body 1, more foam concentrate can be mixed than in the first embodiment.

In each of the above embodiments, a rubber film is used as an example of the foam stock solution storage film. However, any material may be used as long as it is stretchable and water-tight, such as a synthetic resin. It may be. Further, in each of the above embodiments, the vertical type foam stock solution tank is described as an example.However, if the installation state of the foam stock solution storage membrane is changed, it is of course possible to use a horizontal stock solution tank, and the operation is also vertical. The same is true.

[0029]

Since the present invention is constructed as described above, it is not affected by the pressure loss caused by the foam liquid piping, and can continuously operate over an extremely wide flow rate which cannot be obtained by the conventional mixer. Thus, a mixed solution having an appropriate mixing ratio can be obtained.

Therefore, even if the number of foam discharge heads used at the same time is increased and the flow rate is accordingly increased, a mixed liquid having a proper mixing ratio can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

FIG. 3 is a schematic system diagram showing a conventional example.

FIG. 4 is a diagram showing a relationship between a flow rate in a foam raw liquid pipe, a generated differential pressure, and a pressure loss in the pipe.

[Explanation of symbols]

 Reference Signs List 1 foam raw liquid tank main body 3 rubber film 4 mixer 5 opening

Claims (2)

[Claims] A liquid storage tank provided in the liquid storage tank; an opening provided in the liquid storage membrane; and a mixer integrally connected to the opening. Mixing equipment for extinguishing chemicals. 2. A mixing apparatus for extinguishing a fire extinguishing agent, comprising a stock solution tank, an opening provided in the stock solution tank, and a mixer integrally connected to the opening.