KR101514299B1 - Flow control system for pipeline header of water mist nozzle - Google Patents

Abstract

The present invention relates to a flow control system for a water mist nozzle pipe. Even though a water mist fire extinguishing system has excellent fire extinguishing performance, a fire extinguishing agent may cause an electrical problem in areas such as an electrical room, an electricity generation room, and a transformer room; and has a disadvantage of a fire being difficult to properly be fought as the accessibility of a fire source is limited due to a small size of water particles. In order to improve this conventional problem, the present invention connects a gas supply unit and a fire extinguishing water supply unit to a common pipe, and connects from the common pipe to a plurality of water mist head branch pipes wherein a water mist nozzle is installed. A controller first supplies only gas when a fire is initially detected and then properly controls the flow rate of gas and fire extinguishing water, thereby enhancing the efficiency of atomization. As the supply of the fire extinguishing water is cut off after the fire is extinguished, the controller is capable of completely removing residual water inside a pipe by cutting off gas and opening a relief valve at the same time after supplying the gas for a certain period of time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a flow control system for a pipeline,

More particularly, the present invention relates to a flow control system for a micropump nozzle, and more particularly, to a microfluidic nozzle piping flow control system for supplying pressurizing and extinguishing gas and firepower to a micropump nozzle, The fire extinguishing water is supplied to the fire extinguishing water supply pipe together with the fire extinguishing water and the gas is supplied to the fire extinguishing water supply pipe The present invention relates to a microfluidic nozzle piping flow control system capable of completely removing residual water remaining in a piping by opening an installed residual water discharge valve.

Sprinkler equipment or water spraying equipment, which is a water-based fire-extinguishing equipment, installs sprinkler headers or nozzles in a fire area and extinguishes by spraying water. The fire suppression effect of these facilities is mostly accompanied by choking and digestion, which uses water to cool the fire source and to block the oxygen around the fire source as the water used is vaporized.

It is water-based fire extinguishing system that uses water as sprinkler or water spray system, but the diameter of droplet droplets discharged from the nozzle outlet is less than 1,000μm and cumulative volume fraction based on flow rate is more than 99%.

Therefore, the non-microfluidization system is sprayed in the form of fine droplets with a very small droplet size as compared with other water-based digestion systems. Therefore, the effect of cooling by water is covered by the droplet to block oxygen, It has excellent fire suppression ability.

Such a micro-smelting plant is a fire extinguishing system that is highly adaptable to Class A fire, which is a general combustible fire, and Class B fire, which is a gas or oil fire. According to the national fire safety standards issued by the Ministry of Emission and Emergency Management, the micro-smokeless facilities belonging to the category of fire fighting equipment such as water spray are adaptable to the electric fire of class C as well.

However, in the early stage of the fire, a small amount of water droplets is discharged from the micropump nozzle, and then the atomized droplets are discharged in the form of mist. Even after the fire is extinguished, the accumulated digestion water in the piping constantly flows down to electric devices, electric panels, cabinets, There is a possibility of penetration into the device or the like and causing damage due to electric insulation breakdown or water.

Due to these problems, gas-based fire-extinguishing facilities such as carbon dioxide, halogen, and clean fire extinguishing agents are being installed instead of legally recognized non-condensing facilities at the places where electrical equipment such as electric room, power room, and substation are installed.

However, gas-based fire-extinguishing systems are not suitable for Class C fire due to electrical causes. That is, when a fire occurs due to an electric cause in a place where electric equipment such as an electric room, a power generation room, and a substation is installed, a large amount of electric energy is generated in a short period of time.

The CO2 fire extinguishing system can cause personal disaster such as suffocation if the occupant does not evacuate immediately in the event of a fire. The halogen fire extinguishing system is a fire extinguishing agent prohibited in domestic production or use since it is designated as an ozone depleting substance after 2013, Because it is expensive and fire suppression ability is low, a large gas tank is needed and it is difficult to maintain it.

In addition, the gas system fire extinguishing system is a system in which the fire extinguishing agent of the gas reservoir is released by the operation of the fire alarm. If the fire can not be suppressed by one operation or recurrence occurs, measures must be taken. It is possible to install a gas storage room or to use an auxiliary device, but there is a problem in that it is insufficient as a countermeasure.

On the other hand, the reason why the microfluidization system is not actively used for suppressing the fire in the place where the electrical equipments such as the electric room, the power generation room, and the substation are installed is that the nonfat fire extinguishing agent is released This is because it can affect electric devices, panels, instruments, and electric devices that are not cut off.

In addition, after the operation of the micro-denitrification facility is shut off, water remaining in the digestion pipe gradually flows into the electric panel, the cabinet, the measuring equipment, and the electric device, thereby damaging the electric and electronic equipment. Short-circuit, ground fault, etc., may cause undesired malfunction or mis-signal.

Also, in the case of a cable fire, the integrity of the thermosetting or thermoplastic refractory cable can be adversely affected. That is, in the case of a cable fire, when an unexposed fire extinguishing agent is released in a state where the surface temperature of the cable is raised, there is a high possibility of moisture penetration into the cable due to thermal expansion of the cable jacket or insulation material, There is a fear that the fire spreads to spread the fire.

In the case of an oil or gas fire (B class fire), if a large droplet of water droplets is discharged from a plurality of nozzles, there is a high possibility that the oil or gas of the fire source flows and the fire spreads.

Designers have been reluctant to use the application of microduplication facilities in areas such as electric rooms, power generation rooms, substation rooms, or electric panels and instruments, although microdispersing facilities can legally be used in electrical installations.

The main reason for this is that the fire extinguishing agent remaining in the piping at the initial stage of operation and completion of the microfluidization plant is discharged to the electrical equipment and may cause electric problems (ground fault, short circuit, short circuit).

In addition, due to the nature of the microdispersing facility, the diameter of the water particles is very small, so that despite the use of the pressurizing device, the accessibility of the fire source is not sufficient due to the lack of mass acceleration and momentum.

Korean Unexamined Patent Application Publication No. 2003-0093852 (2003.12.11)

Accordingly, it is an object of the present invention to provide a method of controlling a gas supply system for pressurization in a microfluidization plant, a flow rate control method (for gas, fire extinguishing agent) using a pressure signal, And to provide a microfluidic nozzle piping flow control system capable of solving the fundamental problems of the microfluidization facility.

It is a specific object of the present invention to provide a method and apparatus for supplying a pressurized gas for atomization at the closest position of a branch head of a fire zone to increase the droplet atomization and impulse efficiency of the atomizing nozzle, After the gas is released early and the fire is extinguished, the pressurized gas supply valve is shut off later than the extinguishing agent discharge valve to completely discharge the digested water in the extinguishing piping, and the pressurized gas outlet pressure and the extinguishing water outlet pressure are compared , The pressurized gas outlet pressure at the outlet of the fine particle nozzle and the pressure of the branch pipe are compared with each other to increase the droplet atomization efficiency and mass acceleration and momentum by adjusting the opening degree of the control valve, A drain tank (or drain tank) is installed in the head to completely discharge the residual liquid in the digestion pipe to the outside It intended to allow.

According to an aspect of the present invention,

A gas supply unit for supplying the atomization gas,

A fire extinguishing water supply unit for supplying fire extinguishing water,

A drain tank provided in a common pipe of the gas supply unit and the fire extinguishing water supply unit,

A plurality of non-split nozzles respectively provided in a plurality of non-split head branch pipes branched from a common pipe at an output end of the drain tank;

The gas pressure of the pressurized gas supply unit, the pressure of the fire extinguishing water of the fire extinguishing water supply unit, and the pressure of the branching pipe of the non-partitioning head are controlled to control the gas flow rate and the extinguishing water flow rate, And a controller for controlling the release of the liquid.

A residual fire extinguishing agent discharge pipe is connected to the drain tank, and a residual fire extinguishing agent discharge control valve under the control of the controller is installed in the residual fire extinguishing agent discharge pipe, so that residual fire extinguishing water in the pipe can be discharged.

The gas-

A gas supply pressure measuring instrument provided in a common pipe at a rear end of an output end of the plurality of pressurized gas supply valves; A pressurized gas flow rate control valve provided at a rear end of the gas supply pressure meter for controlling the flow rate of the pressurized gas; and a pressurized gas flow rate control pressure sensor provided at the rear end of the pressurized gas flow rate control valve.

The fire extinguishing water supply unit

A fire extinguishing water supply pressure meter provided at a rear end of the fire extinguishing water supply valve, and a fire extinguishing water supply pressure gauge installed in the fire extinguishing water supply pressure gauge, And a flow rate control pressure meter provided at a rear end of the fire-fighting water flow rate control valve.

The controller controls the gas supply unit to supply the pressurized gas first for a predetermined time when the fire is detected, and then controls the fire water supply unit to simultaneously supply the pressurized gas and the fire water.

Wherein the controller controls the fire extinguishing water supply unit to shut off the fire extinguishing water supply and controls the gas supply unit to shut off the pressurized gas supply after supplying the gas for a predetermined period of time, So that the residual fire extinguishing agent in the pipe is released by opening the valve.

The present invention relates to a fundamental problem of a differential non-smoothing facility by the improvement of a pressurizing gas supply system, a flow rate control system (for a gas and a fire extinguishing agent) using a pressure signal, and a valve opening method Can be solved. In addition, by improving the efficiency of atomization and the accessibility of the fire source, it is possible to design a microfluidization plant that can utilize the cooling effect and the choking effect in the fire protection area of the nuclear power plant equipped with the electric panel, There is an effect that can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a systematic view of a system for controlling flow of a non-fractional nozzle piping according to the present invention; FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a system for controlling the flow of a non-condensing nozzle piping according to the present invention. As shown therein,

A gas supply part (40) for supplying an atomizing gas;

A fire extinguishing water supply unit 50 for supplying fire extinguishing water;

A drain tank 20 connected to the common pipe 2 of the gas supply unit 40 and the fire extinguishing water supply unit 50;

(10) provided in each of a plurality of non-divisional head branch pipes (1) branched from a common pipe (2) at an output end of the drain tank (20);

The gas pressure of the pressurized gas supply unit 40, the pressure of the fire extinguishing water of the fire extinguishing water supply unit 50, and the pressure of the non-partitioning head branch pipe 1 are detected to sense the gas flow rate and the fire extinguishing water flow rate, And a controller (100) for controlling the discharge of the gas and the water for fire extinguishing through the fine particle nozzle (10).

The residual fire extinguishing agent discharge pipe 5 is connected to the drain tank 20 and the residual fire extinguishing agent discharge control valve 30 under the control of the controller 100 is further connected to the residual fire extinguishing agent discharge pipe 5 And is configured to discharge fire water and gas in the piping.

The gas supply unit 40,

A plurality of gas storage vessels 41 for storing gas and pressurized gas supply valves 42 provided at the outlet ends of the gas storage vessels 41 and a rear end of the output ends of the plurality of pressurized gas supply valves 42 A gas supply pressure meter P1 provided in a gas pipe 3 commonly connected to the drain tank 20 of the gas supply pressure meter P1 and a pressure gas flow rate sensor A control valve 43 and a pressurized gas flow rate control pressure gauge P2 provided between the pressurized gas flow control valve 43 and the drain tank 20.

The fire extinguishing water supply unit (50)

A fire extinguishing water supply valve 52 provided at an output end of the fire extinguishing water pump 51 and a fire extinguishing water supply valve 52 provided at a rear end of the fire extinguishing water supply valve 52, A fire extinguishing water flow rate control valve 53 installed at the rear end of the fire extinguishing water supply pressure measuring device P3 and a fire extinguishing water flow rate control valve 53 installed between the fire extinguishing water flow control valve 53 and the drain tank 20 And a control unit for controlling the flow rate of the fire-fighting water (P4).

The controller 100 controls the gas supply unit 40 to supply the pressurized gas first for a preset time when the fire is detected and then simultaneously controls the gas supply unit 40 and the fire extinguishing water supply unit 50, And the fire extinguishing water is supplied at the same time.

The controller 100 controls the fire extinguishing water supply unit 50 to shut off the fire extinguishing water supply at the end of the fire suppression and controls the gas supply unit 40 to supply the pressurized gas after a certain period of time. And the remaining resident discharge control valve (30) is opened to release the remaining resident agent in the pipe.

The present invention thus constituted is provided with a gas supply unit 40 for atomization and a fire extinguishing water supply unit 50 which are connected in common to the drain tank 20 and are connected to the output terminal common pipe 2 of the drain tank 20, Branching piping (1) to discharge the atomizing pressurized gas and the digestive water into the fine particle-free nozzle (10) provided in the non-divided head branch pipe (1).

Upon receipt of the fire detection signal from the fire detection system 101, the controller 100 controls the gas supply unit 40 to supply the pressurized gas first. This is a method for increasing droplet atomization and impulse efficiency. This is to completely atomize the extinguishing agent that is emitted from the initial non-condensation nozzle. And then controls the fire extinguishing water supply unit 50 so that fire extinguishing water is supplied together with the gas.

The controller 100 compares the outlet pressure of the gas supply unit 40 with the outlet pressure of the fire extinguishing water supply unit 50 and adjusts the pressure (flow rate) of the gas and the extinguishing water so as to increase the atomization efficiency and accessibility to the fire source. This controls the opening amount of the pressurized gas supply valve 6 and the fire water supply valve 8 by comparing the pressure of the gas supply pressure meter P1 with the pressure of the fire water supply pressure meter P3, The pressure of the pressurized gas flow control valve 43 and the flow rate of the extinguishing water flow control valve 53 are controlled by comparing the pressures of the pressure gauge P3 and the fire water flow control pressure meter P4. In this way, the gas flow rate and the fire water flow rate are controlled to improve the droplet atomization efficiency and the accessibility to the garden.

After completion of the fire evolution, the controller 100 blocks the fire extinguishing water supply unit 50 and the pressurized gas supply unit 40 maintains the gas supply for a predetermined period of time in order to completely remove the residual fire extinguishing agent in the pipe . Thereafter, when the predetermined time elapses, the pressurized gas supply unit 40 is shut off and the residual fire extinguishing agent discharge valve 30 is opened to release the residual fire extinguishing agent (fire extinguishing water and gas) in the drain tank 20 and the piping .

Therefore, the residual fire extinguishing agent (fire extinguishing water) remaining in the piping is discharged in a state of being pressurized by the pressurized gas supply, so that the residual water can be completely discharged by the siphon phenomenon.

1: Non-division head branch piping 2: Common piping
3: Gas piping 4: Digestion water piping
5: Residual Extinguishing Agent Discharge Piping 10: Differential Nozzle
20: Drain tank 30: Residual extinguishing agent discharge valve
40: gas supply part 41: gas storage container
42: pressurized gas supply valve 43: pressurized gas flow control valve
50: fire water supply unit 51: fire water pump
52: fire water supply valve 53: fire water flow control valve
100: Controller P1 - P4: Pressure gauge

Claims (6)

A gas supply part (40) for supplying an atomizing gas;
A fire extinguishing water supply unit 50 for supplying fire extinguishing water;
A drain tank 20 to which the output ends of the gas supply unit 40 and the digestion water supply unit 50 are connected in common;
(10) provided in each of a plurality of non-divisional head branch pipes (1) branched from a common pipe (2) at an output end of the drain tank (20);
The gas pressure of the pressurized gas supply unit 40, the pressure of the fire extinguishing water of the fire extinguishing water supply unit 50, and the pressure of the non-partitioning head branch pipe 1 are detected to sense the gas flow rate and the fire extinguishing water flow rate, And a controller (100) for controlling the discharge of the gas and the digestive water to the fine particle nozzle (10)
In the drain tank 20,
A residual fire extinguishing agent discharge pipe 5 is connected to the residual fire extinguishing agent discharge pipe 5 and a residual fire extinguishing agent discharge control valve 30 under the control of the controller 100 is further provided, Emitting diode,
The controller (100)
Controls the gas supply unit (40) to supply the pressurized gas first, and controls the fire extinguishing water supply unit (50) to simultaneously supply the pressurized gas and the fire extinguishing water,
The controller (100)
After the fire suppression, the fire extinguishing water supply unit 50 is controlled to shut off the fire extinguishing water supply. After the gas is supplied for a predetermined time by controlling the gas supply unit 40, the supply of the pressurized gas is interrupted, And discharging residual fire extinguishing agent in the pipe by opening the discharge control valve (30).
2. The fuel cell system according to claim 1, wherein the gas supply unit (40)
A plurality of gas storage vessels 41 for storing gas and pressurized gas supply valves 42 provided at the outlet ends of the gas storage vessels 41 and a rear end of the output ends of the plurality of pressurized gas supply valves 42 A pressurized gas flow rate control valve 43 provided at the rear end of the gas supply pressure meter P1 for controlling the flow rate of the pressurized gas, And a pressurized gas flow rate control pressure meter (P2) installed between the pressurized gas flow rate control valve (43) and the drain tank (20).
The water treatment system according to claim 1, wherein the fire extinguishing water supply unit (50)
A fire extinguishing water supply valve 52 provided at an output side pipe of the fire extinguishing water pump 51 and a fire extinguishing water supply valve 52 provided at a rear end of the fire extinguishing water supply valve 52, And a drain water flow rate control valve 53 installed at a rear end of the fire water supply pressure measuring instrument P3 so as to be connected to the fire extinguishing water flow control valve 53 and the drain tank 20, (P4) which is installed in the main pipe of the non-aqueous nozzle flow control system.
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