JP2001147016A - Fire extinguishing device for petroleum combustor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a fire extinguishing device for a petroleum combustor capable of stably extinguishing a fire irrespective of the burning state of the combustor. SOLUTION: A wick 4 is vertically movably internally mounted in a gap of a wick containing cylinder 3 having a wick inner cylinder 1 and a wick outer cylinder 2. A wick cylinder 7 is rotated by a wick vertically moving unit 6 contained in an air chamber 5 adjacently out of the cylinder 3 to vertically move the wick 4. An air flow hole 8 for communicating the atmosphere through the chamber 5 is opened when burned and when emergency fire extinguished by an opening/closing valve 10 interlocked with the vertical movement of the wick 4 and normally closed when fire extinguished. During burning, the air flows into the chamber 5 to thin a mixed gas. When emergency fire extinguished in which the wick 4 is moved down below a vent port 9, the mixed gas in the chamber 5 is explosively ignited and burned, substantially simultaneously quickly fire extinguished upon falling of the wick 4. When normally fire extinguished in which the wick 4 is moved down above the port 9, and the introduction of the air into the chamber 5 is prevented to suppress vaporization of a kerosene from the wick 4 and to be naturally fire extinguished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a fire extinguisher for surely extinguishing an oil combustor.

[0002]

2. Description of the Related Art As a fire extinguishing device for an oil combustor, a wick is vertically movably mounted in a gap between wick housings, and an air chamber is provided adjacent to the outside of the wick housing to provide air during use of the oil combustor. When the oil gas is diffused into the room and the wick is lowered below the ventilation hole communicating the gap between the wick housing cylinder and the air chamber during emergency fire extinguishing, the air flowing into the air chamber from the air circulation hole and the oil gas is A structure is known in which a mixed gas is created, and the oil gas in the air chamber ignites the mixed gas with the flame at the tip of the wick and burns explosively, and the generated combustion gas blows out the flame at the tip of the wick to quickly extinguish the fire. Have been.

[0003] The rapid fire extinguishing structure described above is effective as an emergency fire extinguishing device that activates an automatic fire extinguishing device in an emergency such as an earthquake. However, a large amount of unburned gas is released due to rapid fire extinguishing, thereby generating an odor. Was something. Therefore, at the time of normal fire extinguishing when it is not necessary to operate the automatic fire extinguishing system, the descent position of the wick is set higher than the vent so as to prevent rapid fire extinguishing, and the temperature is lowered while burning unburned gas, and the fire extinguishing time There is a thing which aimed at a fire extinguishing without a bad smell by the method of lengthening.

[0004]

By the way, the air circulation hole needs a certain opening area for rapid fire extinguishing, and the air blown to the oil combustor is directly blown by the air while the air circulation hole remains open during combustion. When heading toward the hole, the amount of air flowing from the air chamber to the combustion section becomes abnormally large with respect to the draft of the combustion section, and the combustion state may be deteriorated.

In order for the lead to move up and down in the lead receiving cylinder,
Normally, air that flows into the air chamber from the air circulation hole at the time of fire extinguishing flows through the gap between the core and the core housing cylinder to the upper end of the core because a gap is created because the core and the core housing cylinder cannot adhere to each other. When the amount of air is large, or when the temperature of the wick container becomes high due to small combustion and the amount of kerosene vaporized from the wick is large, combustion is promoted above the wick and the fire extinguishing time becomes abnormally long, or the fire extinguishes. There was a risk of becoming impossible.

As a countermeasure for this, there is an on-off valve mounted so as to close the air flow hole, and a cam plate which rotates together with the core tube and drives the on-off valve. In the fire extinguishing position, the cam plate separates from the on-off valve to close the air circulation hole, and when the core cylinder rotates to the rapid fire extinguishing core lowering position, the cam plate pushes the on-off valve to open the air circulation hole. Has become.

[0007] With this structure, the air circulation holes are closed during combustion, so that a stable combustion state can be maintained even if wind is blown during combustion. In addition, since the air does not flow into the air chamber by closing the air flow hole even during the normal fire extinguishing, the flame remaining at the tip of the core is gradually reduced to extinguish the fire naturally.

However, by closing the air flow hole during combustion, there is no danger of air flowing in through the air flow hole. However, when the draft during small combustion is weak, the oil gas tends to stay in the air chamber, The concentration of petroleum gas in the air chamber may become too high because air does not flow in. Even if the air circulation hole is opened by an on-off valve for rapid fire extinguishing, the air chamber explosively ignites and mixes. In some cases, the ratio could not be reduced, and emergency fire extinguishing was disadvantageous.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a core 4 is vertically movably mounted in a gap between a core accommodating cylinder 3 composed of a core inner cylinder 1 and a core outer cylinder 2. The core receiving cylinder 3
An air chamber 5 is provided adjacent to the outside of the air chamber 5, and a core raising and lowering device 6 housed in the air chamber 5 and a core cylinder 7 that is rotated by the core raising and lowering device 6 outside the core 4 are provided. The core 4 is moved up and down by the rotating core cylinder 7, the emergency fire extinguishing core lowering position is set lower than the normal fire extinguishing core lowering position, and the air chamber 5 and the outside air are provided in the air chamber 5. Communicating air flow hole 8
And a ventilation hole 9 for communicating the gap between the core housing cylinder 3 and the air chamber 5 at a position lower than the normal fire extinguishing core lowering position and higher than the emergency fire extinguishing core lowering position. An on-off valve 10 that opens an air circulation hole 8 in conjunction with up-down movement is provided. In an oil combustor in which the on-off valve 10 opens the air circulation hole 8 during emergency fire extinguishing, air that is opened by the on-off valve 10 during emergency fire extinguishing. The flow hole 8 has a structure that opens during combustion and closes during normal fire extinguishing.

In addition, the air flow hole 8 has a plurality of small holes 8.
a, and the plurality of small holes 8a are opened and closed together by the on-off valve 10, so that the air circulation holes 8 maintain the opening area necessary for rapid fire extinguishing and open the air circulation holes 8 during combustion. Also, air passing through the air flow hole 8 can be regulated by the small hole 8a.

A plurality of small holes 8a forming the air flow holes 8 are arranged vertically, and the on-off valve 10 is mounted on the core cylinder 7 so as to be in close contact with the inside of the outer wall of the air chamber 5 while being in close contact therewith. 7 and the air circulation hole 8 is normally closed by the close shielding plate 10a at the time of fire extinguishing, so that the on-off valve 10 can be constructed with a simple structure. Can be reliably opened and closed.

[0012]

[Action] To quickly extinguish an oil combustor in an emergency,
It is necessary to lower the wick 4 to a position lower than the vent 9, open the air circulation hole 8 by the on-off valve 10, and create a mixed gas in the air chamber 5 at a concentration that can be ignited by the flame of the wick 4 in a short time. is there. In the present invention, since the air circulation holes 8 are set to be opened during combustion, a mixed gas is created by the oil gas that diffuses into the air chamber 5 during combustion and the air that flows in from the air circulation holes 8. When the wick 4 falls to a position lower than the vent 9 during emergency fire extinguishing, the mixed gas diffused into the air chamber 5 is immediately ignited by the flame at the tip of the wick 4, so that the fire can be rapidly extinguished almost simultaneously with the descent of the wick 4. It became.

In order to suppress the generation of odor during normal fire extinguishing, the descent position of the wick 4 is set higher than the vent 9, but the opening / closing valve 1 prevents the air from flowing into the air chamber 5.
Since the air circulation hole 8 is closed by 0, no air is supplied to the core 4 from the air circulation hole 8, the vaporization of kerosene from the core 4 is suppressed, and the natural fire extinguishes slowly.

Further, since the total cross-sectional area of the small holes 8a is large by forming the air circulation holes 8 by a plurality of small holes 8a, it is possible to inflow a constant amount of air when the flow velocity is low. When high-velocity air is blown toward the air flow holes 8 during combustion of the combustor, the air flowing from the air flow holes 8 into the air chamber 5 due to the resistance is blocked by the small holes 8a, Since the amount of supplied air does not change significantly, a stable combustion state can be maintained.

Further, a plurality of small holes 8a are vertically arranged,
If the on-off valve 10 is configured by opening and closing the small hole 8a with the closing plate 10a that rotates together with the core cylinder 7, the rotating closing plate 10a can open and close the plurality of small holes 8a together. Even when the rotation range of the core tube 7 between the normal fire extinguishing and the rapid fire extinguishing is narrow, the closing plate 10a can reliably open and close the small holes 8a.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiment shown in the drawings. The cylinder 3 is a core housing cylinder composed of the core inner cylinder 1 and the core outer cylinder 2, and 4 is a core mounted in the gap between the core housing cylinders 3 so as to be able to move up and down. Immersed in fuel,
The fuel in the oil tank 11 is sucked at the lower part of the wick 4 and supplied above the wick 4.

Numeral 6 is a center raising / lowering device for moving the core 4 up and down, and 1
Reference numeral 2 denotes a core vertical shaft that is rotated by a core vertical knob (not shown), 13 denotes a pinion gear provided at the tip of the core vertical shaft 12,
Reference numeral 7 denotes a core cylinder provided outside the core 4, reference numeral 14 denotes a rack gear attached to the core cylinder 7, and the core raising / lowering device 6 includes a core vertical shaft 12, a pinion gear 13, and a rack gear 14. Reference numeral 15 denotes a drive pin which is viewed from the core 4 to the core cylinder 7. When the core vertical shaft 12 is rotated, the rack gear 14 meshing with the pinion gear 13 is driven, and the core cylinder 7 which rotates together with the rack gear 14 is driven. The core 4 is moved up and down by the pin 15.

Reference numeral 16 denotes a combustion cylinder mounted above the core housing cylinder 3. The core 4 is moved upward by the core raising / lowering device 6 to burn the oil combustor, and the upper end of the core 4 is moved to the position of the core housing cylinder 3. When it protrudes upward and is ignited by an ignition device such as an ignition heater, the fuel sucked below the wick 4 starts burning at the upper end of the wick 4, and the generated combustion flame and combustion gas pass through the combustion cylinder 16 and above it. End the combustion.

Reference numeral 5 denotes an air chamber formed continuously from the core outer cylinder 2 to the outside of the core housing cylinder 3, and the core raising / lowering device 6 is housed in the air chamber 5. Reference numeral 8 denotes an air circulation hole that communicates the air chamber 5 with the outside air. Reference numeral 9 denotes a ventilation hole that communicates the gap between the core housing cylinder 3 and the air chamber 5.
Descend to a lower position.

Reference numeral 10 denotes an on-off valve provided in the air circulation hole 8. The on-off valve 10 closes the air circulation hole 8 during combustion in conjunction with the vertical movement of the wick 4, and closes the air circulation hole 8 during a fire extinguishing operation. Open. For this reason, during combustion, air is prevented from flowing into the air chamber 5 from the air circulation hole 8, so that air does not flow from the air chamber 5 to the combustion section even if wind is blown to the oil combustor. The combustion state is stabilized without any increase in the air flow rate. At this time,
Part of the oil gas evaporating from the wick 4 diffuses into the air chamber 5 through the vent 9.

On the other hand, during the fire extinguishing operation, the air flow hole 8 is opened by the on-off valve 10, so that air flows into the air chamber 5 from the air flow hole 8 and mixes with the oil gas in the air chamber 5,
When the mixed gas is diluted to a combustible mixing ratio, the mixed gas in the air chamber 5 is ignited by the flame at the tip of the wick 4 that has dropped to a position lower than the vent hole 9 and explosively explodes in the air chamber 5. The combustion gas generated by the combustion is discharged from the vent 9 through the core housing cylinder 3.
The flame at the tip of the core 4 is blown out by the wind pressure when entering the gap, and the fire is quickly extinguished.

It is necessary to operate an automatic fire extinguisher in an emergency such as an earthquake to quickly extinguish a fire in a recent oil combustor. The above fire extinguishing structure is effective as a fire extinguishing method in an emergency. At times, a large amount of unburned gas is released from the wick 4, which has the drawback of generating offensive odors. Even during manual extinguishing performed manually, rapid extinction produces odors. Fire extinguishing systems that do not generate fires are preferred.

For this reason, the descent position of the wick 4 is set to a position higher than the vent 9 so that combustion does not explosively occur in the air chamber 5 during normal fire extinguishing, and the wick 4 is drawn into the gap of the wick housing cylinder 3. The flame at the tip of the wick 4 does not extinguish immediately, but gradually burns while burning unburned gas. The fire is extinguished slowly by extinguishing the fire without odor. At this time, the on-off valve 10 keeps the air circulation hole 8 closed,
Since no air is supplied from the air chamber 5 above the core 4, the vaporization of kerosene from the core 4 is suppressed, and there is no possibility that the fire extinguishing time becomes abnormally long or the fire cannot be extinguished.

However, in the structure in which the air circulation hole 8 is closed during combustion, the temperature of the core housing cylinder 3 is high especially during small combustion, and the draft of the combustion part is weak, so that the vaporization occurs in the gap of the core housing cylinder 3. The petroleum gas that has flowed cannot flow above the wick 4 and diffuses into the air chamber 5 to increase the concentration of the petroleum gas. For this reason, even if the air circulation hole 8 is opened during rapid fire extinguishing, vaporization is continuously performed from the core 4 by the core housing cylinder 3 having a high temperature, and the air chamber 5 is cooled by the air flowing from the air circulation hole 8. Since it takes time until the mixture ratio in which the petroleum gas inside ignites with the flame at the tip of the core 4, there is a disadvantage that the fire cannot be extinguished immediately.

In the present invention, the opening / closing valve 10 that opens the air flow hole 8 during rapid fire extinguishing is configured to open the air flow hole 8 even during combustion, so that air flows into the air chamber 5 during combustion and mixes. Gas is thinning. For this reason, even in the small combustion, the mixed gas in the air chamber 5 does not become rich, and the mixed gas in the air chamber 5 is immediately discharged by the small amount of air flowing from the air circulation hole 8 at the time of emergency fire extinguishing. , The mixture became flammable, and rapid extinguishing was possible almost simultaneously with the descent of the core 4.

On the other hand, if the air circulation holes 8 are opened during combustion, the air flowing from the air circulation holes 8 may deteriorate the combustion state when wind is blown on the oil combustor. I have to. In the embodiment of the present invention, reference numeral 8a denotes a plurality of small holes forming the air flow holes 8, and the total cross-sectional area of the small holes 8a is equal to the required cross-sectional area of the air flow holes 8. For this reason, the air passing through the small holes 8a during combustion has a low resistance when the flow velocity is low, and a certain amount of flow velocity can be obtained. Since the flow rate in the air chamber 5 cannot be easily increased because of the resistance due to the resistance 8a, the oil combustor can maintain a stable combustion state by only slightly increasing the air amount.

As a specific embodiment, 10a is an air chamber 5
The shielding plate 10b attached to the core tube 7 in the inside is the shielding plate 10a.
Is a spring material provided between the core plate 7 and the shielding plate 10a.
Is urged by the spring member 10b to come into close contact with the inside of the outer wall of the air chamber 5, and rotate together with the core tube 7. The shielding plate 10a
Is close to the small hole 8a at the normal fire extinguishing position, and comes off the small hole 8a when the core cylinder 7 rotates to the burning position and the emergency fire extinguishing position.
The on-off valve 10 for opening and closing the air circulation hole 8 could be configured.

On the other hand, if the plurality of small holes 8a constituting the air flow holes 8 are arranged in a line in the upper and lower directions, all the small holes 8a are simultaneously opened and closed by driving the closing plate 10a. Even if the range is small, it is only necessary to drive by the width of the small hole 8a. At this time, since the diameter of the small hole 8a is small, the shielding plate 10a
Can reliably open and close the small hole 8a even during a short driving distance from normal fire extinguishing to rapid fire extinguishing.

[0029]

As described above, according to the present invention, since the on-off valve 10 opens the air circulation hole 8 during combustion, air always flows into the air chamber 5 from the air circulation hole 8 during combustion. The mixed gas does not become thick even during small combustion. For this reason, in the emergency fire extinguishing, the air flowing from the air flow hole 8 causes a mixed state in which the flame of the tip of the wick 4 immediately ignites, and the fire is rapidly extinguished almost at the same time as the descent of the wick 4. Safety could be improved.

On the other hand, at the time of normal fire extinguishing, the wick 4 descends to a position higher than the vent 9 so that the mixed gas in the air chamber 5 does not explosively burn in order to suppress the generation of offensive odor. Since the air flow hole 8 is closed by the air flow hole 10, air does not flow in from the air flow hole 8 and is not supplied above the wick 4, so that the generation of gas vaporized from the wick 4 is suppressed and the air is reliably discharged. Because fire extinguishes naturally, stable fire extinguishing performance can be realized.

Further, since the air flow holes 8 are formed by the plurality of small holes 8a, the flow velocity of the air passing through the small holes 8a during combustion becomes slow, and the flow velocity when the wind blows to the oil combustor is high. The air flow is resisted by the small holes 8a, so that the air flowing into the air chamber 5 is blocked, and the total cross-sectional area of the small holes 8a is equal to the cross-sectional area of the air flow holes 8. Inflow of the air amount becomes possible, and the supplied air amount does not change, so that a stable combustion state can be maintained,
A structure in which the air circulation holes 8 are opened during combustion can be realized.

Further, a plurality of small holes 8a are vertically arranged,
If the small holes 8a are opened and closed by the shielding plate 10a that rotates together with the core tube 7, all the small holes 8 can be opened even when the rotation range of the core tube 7 is narrow.
Since a is opened and closed together, the shielding plate 10a can reliably open and close the air circulation hole 8 even at the normal fire extinguishing core lowering position between the time of combustion and the time of rapid extinguishing. Further, it is not necessary to provide a valve in the air circulation hole 8, and the on-off valve 10 can be configured with a simple structure in which the closing plate 10a is simply rotated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a normal fire extinguishing state of an oil combustor showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a normal fire extinguishing state of the oil combustor according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an emergency fire extinguishing state of the oil combustor according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 core inner cylinder 2 core outer cylinder 3 core accommodating cylinder 4 core 5 air chamber 6 core raising / lowering device 7 core cylinder 8 air circulation hole 8a small hole 9 ventilation port 10 opening / closing valve 10a closing plate

Claims (3)

[Claims] 1. A core 4 is vertically movably mounted in a gap between a core housing cylinder 3 composed of a core inner cylinder 1 and a core outer cylinder 2.
An air chamber 5 is provided adjacent to the outside of the air chamber 5, and a core raising and lowering device 6 housed in the air chamber 5 and a core cylinder 7 that is rotated by the core raising and lowering device 6 outside the core 4 are provided. The core 4 is moved up and down by the rotating core cylinder 7, the emergency fire extinguishing core lowering position is set lower than the normal fire extinguishing core lowering position, and the air chamber 5 and the outside air are provided in the air chamber 5. Communicating air flow hole 8
And a ventilation hole 9 for communicating the gap between the core housing cylinder 3 and the air chamber 5 at a position lower than the normal fire extinguishing core lowering position and higher than the emergency fire extinguishing core lowering position. An on-off valve 10 that opens an air circulation hole 8 in conjunction with up-down movement is provided. In an oil burner in which the on-off valve 10 opens the air circulation hole 8 during emergency fire extinguishing, A fire extinguisher for an oil combustor, characterized in that the flow hole (8) is opened during combustion and closed during normal fire extinguishing. 2. The fire extinguisher according to claim 1, wherein the air flow hole is formed by a plurality of small holes, and the plurality of small holes are opened and closed together by an on-off valve. 3. A plurality of small holes 8a forming the air flow holes 8 are arranged vertically, and the on-off valve 10 is attached to the core tube 7 so as to closely contact the inside of the outer wall of the air chamber 5. The fire extinguisher for an oil combustor according to claim 1, characterized in that the fire extinguishing device is constituted by a closing plate (10a) that rotates together with the opening (7), and the air circulation holes (8) are normally closed by the closing plate (10a) close to the fire.