JPS6125962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fire extinguishing system capable of extinguishing a burning oil combustor in a short time by simply lowering the wick.

Generally, when a burning oil combustor is immersed in a wick housing cylinder, it takes 100 to 250 seconds to gradually reduce the flame and extinguish the flame as the amount of petroleum gas produced decreases. Since this method extinguishes the fire while burning the vaporized gas generated, it can be said to be an excellent method as it generates little odor when extinguishing the fire. However, in the event of an abnormality during an earthquake, it is desirable to extinguish the fire within a short period of time, from several seconds to at least 10 seconds.
There is a need to introduce some kind of structure.

Two systems are known in the art for this type of purpose, both of which, either alone or in combination, constitute a fire extinguishing system in conjunction with core lowering.
One of these methods is to provide a small hole or slit opening in the wick storage cylinder that communicates with the outside air, create a negative pressure area in the gap between the wick storage cylinders by drafting the combustion cylinder and lowering the wick, and simultaneously lowering the wick and releasing a large amount of air. This system supplies air from the opening, blows out the combustion flame, and dilutes the petroleum gas to the point where it cannot be combustible, thereby extinguishing the fire. Another method is to create an oil and gas chamber adjacent to the core storage tube in which oil gas and air create an appropriate mixture of gas, and when lowering the core from the opening of the core storage tube that communicates with the oil and gas chamber, the oil and gas chamber The combustion gas from the deflagration is ejected from the opening to blow it out.

However, both of these systems are not perfect and have inherent drawbacks; in the case of the former, in order to bring the extinguishing time closer to instantaneous extinguishing, openings are placed around the entire periphery of the wick storage cylinder to supply air uniformly. Because of this, the total area of the opening tends to be large, which can cause petroleum gas to leak from the opening in the wick storage cylinder and cause direct ignition during normal combustion, or conversely, a large amount of air can flow in through the opening, lowering the combustion point. If it comes close to the core housing cylinder, there is a risk of abnormal heating of the core housing cylinder and oil tank. In addition, in the latter method, it is difficult to keep petroleum gas in a state capable of deflagration in the petroleum gas chamber at all times, and if the petroleum gas is highly concentrated and does not deflagrate, there is no hope of extinguishing the fire in a short time.

This invention proposes a fire extinguishing system that is completely different from conventionally known structures and can be called a third system, in which the gap 2 of the wick housing cylinder 1 is made larger than the thickness of the wick 3 to allow air circulation. , and an opening 4 with a small hole or slit is provided on the entire circumference of the wall of the lead housing cylinder 1 which is slightly higher than the upper end of the lead 3 when lowering the lead, and the opening 4 communicates with an air chamber 5 adjacent to the lead housing cylinder 1. At the same time, a valve 6 connected to the outside air is provided in the air chamber 5,
This valve 6 relates to a fire extinguishing system for an oil combustor, which is characterized in that the valve 6 is linked to the top and bottom of the wick, opens when the wick is raised, and closes when the wick is lowered. In the embodiment, the wall of the core housing cylinder 1 is configured to be separated into an upper core housing cylinder 1' and a lower core housing cylinder 1'', and the lower part of the upper core housing cylinder 1' becomes the outer wall of the air chamber 5. Further, the upper part of the lower core housing cylinder 1'' is extended and connected to the wall of the air chamber 5 in the form of a flange, and a slit-shaped small hole 4' is provided in the flange portion. Therefore, the opening 4 in the wall of the core housing cylinder 1 is composed of a gap 4'' formed between the upper core housing cylinder 1' and the lower core housing cylinder 1'' and a small hole 4' in the flange portion. 7 is a lead up/down device, 7' is a lead holding plate, 8 is a lead up/down shaft that drives the lead up/down device 7,
9 is a return spring that rotates the core vertical shaft 8 in the core lowering direction. 10 is a rack gear that rotates the core holding plate drive plate 7'' when the lead vertical axis 8 rotates, and a protrusion 11 attached to the lead holding plate driving plate 7'' causes the lead holding plate driving plate 7'' to rotate. Accordingly, the valve 6 of the air chamber 5 is pushed open.

In this invention having the above-described structure, the core 3 is thinner than the core housing cylinder 1 and the gap 2, allowing air to circulate.
In addition, since there is no opening in the wall of the wick accommodating cylinder 1 that communicates with the outside air, the draft of the combustion cylinder caused by the combustion flame flows directly into the air chamber 5 through the opening 4 from the gap between the wick 3 and the wick accommodating cylinder 1.
Since the valve 6 is open when the wick is raised, outside air flows into the air chamber 5 due to the draft of the combustion tube, and then flows from the opening 4 through the gap in the wick housing tube 1 to the combustion tube. . For this reason, air chamber 5
The interior is always filled with fresh outside air, and even when the air chamber 5 is used also as a core up/down device storage chamber or an oil sump chamber in the event of an overturn, it is filled with air that contains almost no petroleum gas. . Therefore, when the wick vertical shaft 8 is rotated by the force of the return spring 9 or manually during extinguishing operation, the valve 6 of the air chamber 5 is first closed, making the air chamber 5 a sealed chamber, and the wick 3 is moved slightly below the opening 4. descend to On the other hand, new air is always introduced into the air chamber 5 during combustion, and this new air flows between the wick 3 and the wall of the wick housing cylinder 1, so the temperature of the air chamber 5 and the wick housing cylinder 1 is close to room temperature. The amount of petroleum gas generated from the core 3 in the lowered position is cooled by the core housing cylinder 1 and becomes very small. The combustion flame drawn into the gap 2 of the wick housing cylinder 1 as the wick 3 descends consumes the oxygen in the air chamber 5 sealed from the opening 4 and turns the gas in the air chamber 5 into a non-flammable gas. The petroleum gas generated from the wick 3 due to the turbulence diffuses into the air chamber 5, and since the air chamber 5 does not contain any petroleum gas in advance, the petroleum gas in the wick storage cylinder gap 2 around the opening 4 cannot continue to burn. It can be diluted to a state of

The above action progresses instantaneously when the wick is lowered, and if we focus on the amount of petroleum gas generated from the wick, the amount of oil gas generated will first decrease, and some percent of this will combine with oxygen in the air chamber 5 and burn. Since the petroleum gas is consumed and further mixed and diffused with the air in the air chamber 5, the amount of petroleum gas around the opening 4 in the upper part of the wick 3 becomes extremely thin.

On the other hand, since there is no opening in the wall of the core housing cylinder 1 to introduce outside air, oxygen must be supplied from the upper end of the core housing cylinder 1 in order for the petroleum gas in the gap in the core housing cylinder 1 to continue burning. The combustion flame of the petroleum gas left in the wick storage cylinder gap 2 above the opening 4 during the descent is blocked by a thin layer of petroleum gas and burns out without igniting the upper end of the wick 3. Thereafter, the volume of the air chamber 5 is limited, and the petroleum gas that continues to vaporize from the wick 3 increases the gas concentration to a flammable state, but by this time the combustion flame has been extinguished and there is no risk of re-ignition. Not at all.

In addition, in order to ensure fire extinguishment, openings 4 consisting of small holes or slits are formed around the entire circumference of the core housing cylinder 1 wall.
It is necessary to provide a hole to communicate between the air chamber 5 and the core housing cylinder gap 2, and the total area of the opening 4 becomes large, but the amount of air flowing in from the valve 6 opened in the air chamber 5 is very small. The air chamber 5 can be filled with fresh outside air after the passage of time, and there is no possibility that a large amount of air will flow into the combustion section from the core housing cylinder gap 2 and cause abnormal combustion.

Furthermore, both known methods have extremely strong odors during forced extinguishing, but the present invention does not have an opening in the wall of the wick housing cylinder 1 to introduce outside air.
There is no fear that the rich petroleum gas in the wick storage cylinder gap 2 will be introduced into the high-temperature combustion cylinder by the draft of the combustion cylinder and turn into metamorphosed gas and emit subodor into the room. In addition, since the air chamber 5 connected to the opening 4 initially contains almost no petroleum gas, even if petroleum gas is generated from the wick 3 after extinguishing the fire, the petroleum gas, which is heavier than air, will first pass through the air chamber 5 to the highly concentrated petroleum gas. After the wick storage cylinder gap 2 is filled with gas, by the time the wick storage cylinder 1 is filled with rich petroleum gas, the combustion cylinder has also been sufficiently cooled, so that no foul odor occurs.
In this respect, in a device having an oil and gas chamber similar to an air chamber, the oil and gas chamber is filled with oil and gas in advance, and at the time of deflagration, a large amount of oil and gas is forcibly discharged into the combustion cylinder, which is fundamentally different from the present invention. It is different in terms of

As described above, since this invention utilizes the draft that is always generated when there is a combustion flame, there is no need to specify the configuration shape of a combustion tube or similar auxiliary combustion device.
It is a very practical fire extinguishing device that can be applied to any type of fire extinguishing device, and since the draft is not required at all during fire extinguishing operations, it operates effectively even in the event of a fall.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of this invention, and FIG. 2 is a cross-sectional view of the same. 1... Core housing cylinder, 2... Core housing cylinder gap, 3...
Core, 4...opening, 5...air chamber, 6...valve.

Claims (1)

[Claims] 1. The gap between the core housing cylinders is made larger than the core thickness to allow air circulation, and an opening is provided around the entire circumference of the core housing cylinder wall that is slightly higher than the upper end of the core when lowering the core, and the openings allow the core housing cylinder to The air chamber is connected to an air chamber adjacent to the wick, and the air chamber is provided with a valve connected to the outside air, and the valve opens when the wick rises in conjunction with the top and bottom of the wick,
A fire extinguishing system for an oil burner characterized by being closed when the wick is lowered.