JPS6010960B2 - fluid proportional injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid proportional injection device for injecting and mixing two or more different types of fluids at an arbitrary ratio using the pressure of pressurized gas.

Although there are various types of devices of this type, the following explanation will focus on fire extinguishing equipment for convenience.

Most conventional fire extinguishing equipment for buildings uses power such as electricity. In other words, a typical example is to use an emergency engine to operate a private power generation facility and drive a pump. This type of system has many problems, such as the complicated control equipment that requires constant maintenance, partial failures that make it impossible to operate the system, and the presence of spark-generating parts that make it impossible to install in some locations. Therefore, when one of the mixed liquids is a pressurized liquid such as water supply, this pressurized liquid drives a turbine, and this turbine also drives a pump for injecting the other type of liquid to inject two or more types of liquid. A mixture is being considered. According to this method, there is no igniting part, so there is no concern at all in terms of safety. However, on the other hand, since turbines, pumps, etc. are required, the facility becomes large-scale and equipment costs are high, and since it has a rotating body, constant maintenance is still indispensable. In view of these points, the present invention provides a fluid proportional injection device that uses the pressure of pressurized gas to eliminate the need for turbines, pumps, etc., thus simplifying the equipment, increasing economic efficiency, and making it easy to install. The purpose is to

An embodiment of the present invention will be described below with reference to the drawings. In the attached diagram, 11 is a water supply pressurized liquid path (hereinafter simply referred to as a pressurized liquid path) as a firefighting waterway, 12 is a variable orifice flow rate detection unit provided in this pressurized liquid path 11, and 13 is a water supply system that accommodates a chemical extinguishing liquid. 14 is an injection ratio control for injecting the extinguishing liquid discharged from the extinguishing liquid tank 13 into the outlet side of the orifice flow rate detection section 12 at a constant ratio to the pressurized liquid in the pressurized liquid path 11. and 15 is a pressure gas cylinder containing pressurized gas such as liquefied carbon dioxide, which is airtightly connected to the fire extinguishing liquid tank 13 through a valve 16 and controls the injection ratio by applying pressure to the fire extinguishing liquid. The liquid is injected into the pressurized liquid path 11 via the container 14. That is, in the case of carbon dioxide gas, it expands by about 5M, so a small pressure gas cylinder 15 can be used for practical purposes. Note that 17 indicates a check valve. The pressurized gas may be any pressure gas as long as it does not react with the extinguishing liquid, so in addition to carbon dioxide gas, Freon, Nisso, etc. may also be considered. In the above configuration, a pressure of P is applied to the upper part of the diaphragm 19 of the mixel valve 18 of the injection ratio controller 14 through the introduction pipe 20, and a pressure of P is applied to the lower part of the diaphragm 19 so that the mixel valve outlet pressure P,' is balanced equally with P. If the valve opening degree is determined as follows, the pressure difference P, -P2 caused by the orifice 12 of the pressurized fluid path 11 becomes equal to the pressure difference P,'-P2' caused by the other variable orifice type setting valve 21.

That is, if the flow rate of the pressurized liquid path is Q and the flow rate of other liquids is Q', then Q=K(P, -P2)Q Q=K'(P no P2')Q. Q'K'.・Q-K=constant However, in the case of a fixed orifice, Q=1'2 is known, but in the case of a variable orifice, Q=depends on the shape of the plug.
It is possible to set it to 1 or 3/2.

Therefore, when the pond liquid pressure is Po, under the condition that Po>P, Q' can be injected at a constant ratio to Q regardless of Po. Therefore, if the pressure from the pressure gas in the pressure gas cylinder 15 is applied to the fire extinguishing fluid in the fire extinguishing fluid 13 by opening the valves 16 and 18 when a fire occurs, the orifice flow rate in the pressurized fluid paths 1 and 1 can be detected. Since the extinguishing liquid is injected and mixed at a certain ratio determined by the setting valve 21 to the outlet side of the section 12, extinguishing water mixed with a predetermined ratio of extinguishing liquid is sprayed from the sprinkler at the end of the pressurized liquid path 11. become.

Moreover, in this case, even if the amount used in the pressurized liquid path 11 changes and the pressurized liquid pressure P changes, the injection ratio does not change, so the fire extinguishing water is always mixed with a fixed ratio of fire extinguishing liquid determined by the settings. It becomes possible to disperse In the above embodiment, a water supply is shown as the pressurized liquid path 11, but this is not limited to a water supply, but may be a sewer, for example, as long as it has a required pressure.

It is also possible to mix two or more kinds of liquids. In addition, as shown by the chain line, the pressurized liquid path 11 is connected to the water storage tank 22,
If this water storage tank 22 is pressurized with pressurized gas in the event of a fire, it can be used even in places without water or sewage facilities.

If you use this method even in places with water and sewage facilities, you can prepare for fires during water outages. As mentioned above, in the present invention, the pressure of the pressurized gas is used to perform the liquid combination, so a turbine and a pump in the secondary tank are not required, and instead, a small cylinder filled with the pressurized gas can be provided. Since the equipment is greatly simplified and maintenance is almost eliminated, both economic efficiency and reliability are significantly improved.

The injection device of the present invention can be used in various fields. Sprinklers are typical, and the above-mentioned fire extinguishing equipment is one example. In addition, if pesticides or fertilizers are used as the pond seed liquid, it can be used for water waves, if feed or nutrients are used, it can be used for fish and shellfish cultivation, and if a chemical solution is used, it can be used for scale liquid treatment. According to the present invention described above, the variable orifice flow rate detection section is provided in the middle of the pressurized fluid path connected to the pressurized fluid source, and the variable orifice flow rate detection section is responsive to the pressurized fluid pressure on the inlet side of the variable orifice flow rate detection section. A diaphragm that controls the pressure of the other fluid flowing in from the other fluid source to be equal to the pressurized fluid pressure on the inlet side of the variable orifice flow rate detection section; An injection ratio controller equipped with a variable orifice type setting valve that injects at a preset ratio is provided on the output side of the detection part so that the other fluids injected into the pressurized fluid are controlled at a preset constant ratio. Therefore, even if the pressure of the pressurized fluid changes, the injection ratio of other types of fluid will not change, and the pond type fluid can always be mixed with the pressurized fluid at a constant ratio. It has excellent reliability.

In addition, the other type of fluid source, this other type of fluid source, and the pressurized fluid source use the pressure of the pressure gas source to mix the other type of fluid with the pressurized fluid, so the equipment is large-scale. Therefore, it is possible to provide an economically advantageous proportional fluid injection device that can be simplified and easily installed in the interior of the vehicle.

[Brief explanation of the drawing]

The accompanying drawing is a system diagram of one embodiment of the present invention. 11... Pressurized liquid path, 12... Variable orifice flow rate detection section, 13... Fire extinguishing liquid cylinder, 1
4... Injection ratio controller, 15... Pressure gas cylinder.

Claims (1)

[Claims] 1 A pressurized fluid source, a pressurized fluid path connected to this pressurized fluid source and provided with a variable orifice flow rate detection section midway, a different type of fluid source injected into the fluid of this pressurized fluid path, and a source of other fluid, or a source of pressurized gas that pressurizes the source of fluid and the source of pressurized fluid; A diaphragm that controls the pressure of the seed fluid to be equal to the pressurized fluid pressure on the inlet side of the variable orifice flow rate detection section, and the other type of fluid whose pressure is controlled by this diaphragm is injected into the outlet side of the variable orifice flow rate detection section. A fluid proportional injection device comprising an injection ratio controller including a variable orifice type setting valve and controlling the other type of fluid injected into the pressurized fluid to a preset constant ratio.