JPH06262053A - Foaming chemicals mixing apparatus - Google Patents

Abstract

PURPOSE:To make mixing ratio of water and foaming chemicals always const. even when there exists fluctuation of feeding pressure of water in an apparatus using differential pressure compounding pipe. CONSTITUTION:A part of a water feeding part 2a of a compounding pipe 1 branches and is connected with a gear motor 8 and a foaming chemicals pouring part 4a is connected to a gear pump 5 and the gear pump 5 is driven by means of the gear motor 8 and the foaming chemicals is poured into the compounding pipe 1 to mix it with water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam medicine preparation device for mixing a foam fire extinguisher with water in a fire extinguisher.

[0002]

2. Description of the Related Art In foam extinguishing systems, there are various types of devices that use a mixing pipe for mixing water and a foaming agent.

The example of the apparatus shown in FIG. 2 is called a differential pressure mixing system (pressure proportioner), in which pressure water is introduced into a foam medicine tank, and the foam medicine is directly pressurized by this pressure water, so that a pressure equal to the water pressure is obtained. This is a method in which a foaming agent is press-fitted into a mixing pipe to form a water-bubble mixed solution having a prescribed ratio in the mixing pipe.

The example of the apparatus shown in FIG. 3 is called an isobaric mixing method (pressure side proportioner), in which a pump for feeding a foaming agent is driven by the power of a motor or the like, and the pressure of the water supply section and the pressure of the foaming agent injection section are equalized. This is a method in which a foaming agent is made to have an equal pressure by a pressure valve, and a foaming agent is press-fitted into a mixing pipe to form a water-bubble mixed solution having a specified ratio in the mixing pipe.

The apparatus shown in FIG. 4 is called a water motor proportioner system. A water motor is provided in the main stream of the water supply pipe to obtain a rotation speed proportional to the amount of water supplied, and this motor drives a gear pump for foaming chemicals. This is a system in which a foaming agent with a prescribed ratio is pressed into a water supply pipe directly by driving without using a mixing pipe.

[0006]

The examples of FIGS. 2 and 3 are as follows.
A blending tube is used to mix the foam drug with water.
Originally, in the mixing pipe, for example, an orifice or the like is provided in the mixing pipe so as to determine the flow rates of both liquids so as to mix the pressure water and the foaming agent in an appropriate ratio.

However, in the system shown in FIG. 2, it is impossible to replenish the tank with the foaming agent while the apparatus is operating. Further, since the foaming agent is directly pressed with water, the remaining foaming agent is diluted with water after the use of this device, and the remaining foaming agent becomes unusable and must be discarded. As an improvement of this,
There is a device for separating the foam medicine from water by providing a rubber bag in the foam medicine tank, but it has the drawbacks that the bag is easily broken, it is troublesome to handle and expensive.

In the system shown in FIG. 3, the system is complicated and expensive, and generally requires a power source, and an auxiliary power facility or the like is required as a measure against electric facility construction and power failure. Also, since the control device is provided in the foam drug line, the probability of failure of this device increases. In addition, there are drawbacks such that maintenance is troublesome and the installation area of the device is large.

In the system of FIG. 4, since the water motor is directly inserted in the water supply line, the pressure loss of the water supply line is large, and it is extremely difficult to obtain an appropriate water bubble mixing ratio over a wide flow rate range. Also, since the amount of water is considerably large, the water motor for this becomes large,
In fact, it is rarely used because it requires a huge amount of equipment and has a drawback that the water motor is easily damaged.

The present invention solves this problem in view of the above-mentioned drawbacks of the conventional apparatus, and makes use of the performance of the proper ratio of water to the foaming agent in the blending pipe to provide a foaming agent mixing apparatus with higher performance. It is a thing.

[0011]

According to the present invention, a mixed solution having a prescribed ratio is obtained by supplying water and a foaming agent having a substantially equal pressure to a compounding pipe. This is realized by the cooperation of a positive displacement motor (gear motor) that operates by the water supply pressure and a positive displacement pump (gear pump) that pressurizes the foam drug.

That is, in a device using a mixing pipe for mixing water and a foam drug, a gear pump is provided in a foam drug injection line connecting a foam drug injection part of this mixing pipe and a foam drug tank, and a part of a water supply line is connected. Gear hydraulic motors are respectively provided on the hydraulic lines for branching and discharging the water, and the gear pumps are driven by the gear motors to inject the foam pharmaceutical into the mixing pipe.

[0013]

Function: The fire extinguisher works to send pressurized water to the water supply line to enter the mixing pipe. The pressure water in a part of the water supply line rotates the gear motor of the hydraulic power line. Then, the gear pump connected to this motor is driven, the foam drug in the foam drug tank enters the mixing pipe, and the water and the foam drug are mixed in the mixing pipe and sent to the fire scene from the water foam mixing line.

Both the gear motor and the gear pump flow the amount of liquid peculiar to the equipment in proportion to the number of rotations, and water and the foaming agent are mixed in an appropriate ratio in the mixing pipe.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiment shown in FIG.

A mixing pipe 1 is provided with a water supply section 2
The water supply line 2 is connected to a and the water bubble mixed solution line 3 is connected to the opposite side. Further, the blending pipe 1 has a foam drug injecting portion 4a on its side, and the foam drug injecting line 4 is connected to this. Further, the mixing pipe 1 is provided with an orifice 1a which is located near the water supply unit 2a and makes the amount of water supply a predetermined flow rate, and an orifice 1b which makes the foam drug injection unit 4a a predetermined flow rate of the foam drug. A gear pump 5 is connected to the foam drug injection line 4, and the gear pump 5 is connected to a foam drug tank 6. A water line 2a of the mixing pipe 1 is branched and connected to a hydraulic power line 7. A gear motor 8 is connected to the hydraulic line 7 so that water passing through the gear motor 8 is drained. The gear pump 5 is connected to be driven by a gear motor 8.

The ratio of the capacity of the gear motor to the capacity of the gear pump is determined by their respective efficiencies, but generally 1.
It is about 5: 1 to 2: 1. Further, the gear motor and the gear pump may be directly connected, or may be decelerated or speeded up via a gear or the like.

Depending on the individual performances of the gear motor and the gear pump, a flow rate adjusting valve or the like may be provided in the hydraulic power line or the foam drug injection line, if necessary.

Incidentally, by returning the drainage of the gear motor to the water source of the water supply section, the water is not wasted.

[0020]

According to the present invention, the water supply section is provided with a gear motor, which is rotated by the water supply pressure, and the foam drug injection section is provided with a gear pump, which is driven by the gear motor of the water supply section. I have to. From this, the appropriate supply pressure and supply flow rate of the foam drug are always secured according to the fluctuation of the water pressure of the water supply part and the fluctuation of the flow rate of the water-bubble mixture solution, and the bubbling drug solution of a constant concentration is obtained in the compounding pipe and the fire extinguisher device Normal fire extinguishing performance can be maintained throughout operation.

The device can replenish the foam drug during operation, and can always inject the foam drug of a normal concentration into the compounding pipe without mixing water in the foam drug storage tank.

The device does not require a power source or electrical work, and therefore does not require a power failure countermeasure. In addition, it does not require a flow control device in the foam drug line, has a simple structure, is robust, and can be easily inspected and maintained for a long period of time with peace of mind.

The conventional apparatus using the mixing pipe has many features such as easily improving the performance by simply attaching a commercially available gear motor and a gear pump.

[Brief description of drawings]

FIG. 1 is a piping system diagram according to an embodiment of an apparatus according to the present invention.

FIG. 2 is a piping system diagram showing a conventional device.

FIG. 3 is a piping system diagram of another conventional device.

FIG. 4 is a piping system diagram of another conventional device.

Claims (1)

[Claims] 1. A device using a mixing pipe for mixing water and a foam drug, wherein a gear pump and a part of the water supply line are connected to the foam drug injection line connecting the foam drug injection section of this mixing pipe and the foam drug tank. A gear medicine motor is provided on each hydraulic line for branching and discharging water, and the gear pump is driven by the gear motor to inject the foam medicine into the mixing pipe.