JPS5866717A - Extinguisher for petroleum combustor - Google Patents

Abstract

PURPOSE:To make unburnt oil not to be left in a pot at the time of extinguishing, by a method wherein an oil supply duct is opened in an air pipe connecting an air duct with an inside of the pot and oil is supplied into the pot in an instantaneously combustible state. CONSTITUTION:A pot 4 is installed in an air duct 3 which is connected with a suction opening 2 of a blower 1, a large number of small holes 5 provided on a side wall of the pot 4 are opened in the air duct 3, an air pipe 6 connecting an inside of the pot 4 with the air duct 3 is provided, an oil supply duct 7 is opened in the air pipe 6 and a branch pipe 8 is installed on the air pipe 6. When air in the air pipe 6 is absorbed into the branch pipe 8 and remaining flame at the opening of the pipe 6 is extinguished, a combustor is extinguished immediately because the unburnt oil is not left behind already in the pot 4 at this time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire extinguishing system that can shorten the extinguishing time of a pot-type oil combustor to 10 seconds or less.

In conventional pots that supply fuel to the pot to vaporize oil, mix it with combustion air, and burn the mixed gas, the fuel remains on the bottom in the form of oil droplets or wetness, so after the extinguishing operation to stop the fuel, The fire continued to burn for 5 minutes, making it extremely difficult to extinguish it instantly.

The purpose of this invention is to shorten the fire extinguishing time.The pot 4 is attached to the air passage 3 connected to the hot air blower 2 of the blower 1, and the oil pipe 7 is opened to the multi-air vibro provided on the side wall of the pot 4. The air vibro from the connection part with the pot 4 to the pot 4 has a downward slope, and a branch pipe 8 is connected to the air vibro.
This relates to a fire extinguishing system for an oil combustor, which is characterized in that the air vibro air is sucked into the branch pipe 8 after a fire extinguishing operation. In addition, 9 in the figure is the mixing board installed inside the pot 4,
Reference numeral 10 denotes a combustion chamber located above the pot, into which a skeleton 11 is attached, and heat rays are radiated from the skeleton 11 which becomes red hot due to combustion heat. Reference numeral 12 denotes an oil amount regulator attached to the oil feed pipe 7, and an oil amount knob 13 allows the fuel to be stopped and the fuel flow to be varied to any desired value. Reference numeral 14 denotes an operating pin attached to the oil amount regulator 12, which is opened/closed or operated to vary the flow rate by a solenoid 15. In the embodiment, the solenoid 15 is used as a means for sucking the air in the air pipe 6 to the branch pipe 8.
At the same time as the oil is turned into fuel using the oil volume knob 13, the main switch 16 that is linked to the oil volume knob 13 is opened, and after a few seconds, the solenoid 15 is de-energized. When the actuating pin 14 is pressed, the space into which the movable body 17 has moved becomes a negative pressure, and the air inside the air vibro is sucked. In addition to the solenoid that operates the operating pin 14 of the oil amount regulator 12, for example, a solenoid that changes the amount of combustion air or a solenoid that drives a mechanical part can be used if it can be returned to its original state after a delay after extinguishing the fire. can. Alternatively, a dedicated pneumatic piston or solenoid that directly drives the bellows may be used.

In addition, when a large suction force cannot be obtained, such as when reusing a solenoid that is used elsewhere, as in the example, the air path 3
If an on-off valve or orifice 18 is attached to the air vibro between the connection part between the first branch pipe 8 and the first branch pipe 8, most of the air sucked into the first branch pipe 8 can be supplied from the pot 4 side, increasing the reliability of extinguishing the fire.

During combustion, the combustion gas generated in the pot 4 becomes lighter and rises, creating a negative pressure inside the pot 4. Therefore, combustion air can be supplied from the small holes 5 of the pot 4. . On the other hand, since the air pipe 6 of the present invention also communicates between the air passage 3 and the inside of the pot 4 in the same manner as the small hole 5, combustion air flows from the air passage 3 toward the pot 4. Further, the oil feed pipe 7 is opened to the air vibro, and fuel is supplied into the air vibro, so that the connection part with the oil feed pipe 7 reaches the pot 4.

Combustion air and fuel now coexist in the Air Vibro.

When the combustion continues and the pot 4 is sufficiently heated, the temperature of the air vibro connected to the pot 4 becomes higher the closer it is to the pot 4, and the vaporization of the fuel in the air vibro is promoted. The air passing through is instantly mixed and blown into the pot 4.

In addition, the fuel that cannot be vaporized in the air vibro has already been sufficiently preheated, and the mixed gas of air and fuel flowing into the pot 4 from the air vibro increases in volume during vaporization and is blown out into the pot 4 at a high flow rate. The fuel does not stay in the connection between the air pipe 6 and the pot 4, but spreads over the entire pot 4 as fine oil droplets, and instantly vaporizes, so that no fuel remains in the pot 4.

On the other hand, since the oil feed pipe 7 is only indirectly heated by the heat of the air vibro and does not reach a high temperature, the fuel supply can be stopped using the oil amount knob 13 or the like.

Even if fuel is present at the tip of the oil feed pipe 7, this fuel hardly vaporizes, and the very small amount of fuel that vaporizes is diluted by the air flowing inside the air vibro. As a result, the combustion flame that had spread inside the pot 4 disappears instantly with the extinguishing operation, and only a small amount remains at the tip of the air vibro, and as the temperature of the oil pipe 7 falls, the vaporization of the fuel decreases and the air from the air vibro dilutes it to a non-combustible state. The fire will naturally extinguish. This extinguishing time is affected by the amount of combustion before the extinguishing operation, and the maximum
It is about 0 seconds to 20 seconds. For this reason, when the air inside the air vibro is sucked into the branch pipe 8 a few seconds after the extinguishing operation, the slight flame remaining at the tip of the air vibro is also sucked into the air pipe 6, making the supply of fresh air incomplete.

Inhaled combustion flames are instantly extinguished.

As described above, the fire is completely extinguished when the air in the air pipe is sucked into the branch pipe after the oil flow has stopped, so there is a long delay between the oil flow stopping and air suction into the branch pipe. For this reason, an oil combustor that uses a pot cannot be used as a combustion mechanism for a porta-pull oil combustor because the extinguishing time is long, but the fire extinguishing device of this invention has made this possible. This is a practical invention that has an extremely wide range of applications.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of this invention, and FIG. 2 is a sectional view of the main parts.

Claims (1)

[Claims] A pot is attached to the air passage connected to the zero outlet of the blower, a large number of small holes are opened in the side wall of the pot, and an air pipe is provided to communicate the inside of the pot with the air passage. A petroleum oil product characterized in that the oil pipe is opened, the air pipe from the connecting part with the oil pipe to the pot is sloped downward, and the air pipe is provided with a branch pipe, and the air in the air pipe is sucked into the branch pipe after extinguishing operation. Combustor fire extinguishing system.