JP3947849B2 - Method for manufacturing fire extinguishing mechanism of oil combustor - Google Patents

Description

  The present invention relates to improving the fire extinguishing performance of an oil combustor.

As a conventional core up-down type oil combustor, the core is mounted so that it can move up and down in the gap of the core housing cylinder composed of the core inner cylinder and the core outer cylinder, and the core lower cylinder is positioned on the wall surface of the core outer cylinder when the fire is lowered There are several places where the openings communicating with the outside air are uniformly arranged at a higher position around the circumference, the core descends during fire extinguishing, air flows in from the opening upwards, and the kerosene vapor that vaporizes from the core immediately after the core descends There is known a structure that rapidly extinguishes by diluting to a non-combustible state (see Patent Document 1).
In addition, in order to increase the reliability of fire extinguishing, an air chamber is adjacent to the outside of the core housing cylinder, and the gap between the core housing cylinder and the air chamber are communicated with each other through a vent, so that the air chamber can be used while using the oil combustor. When the gas is diffused to create a mixed gas with air and the wick is lowered during fire extinguishing, the mixed gas in the air chamber is ignited by the flame at the tip of the wick and burns explosively, and the generated combustion gas is emitted from the vent There is a structure that quickly extinguishes the flame by blowing off the flame at the tip of the lead by the wind pressure when entering the gap of the lead containing cylinder.

  The above structure is effective when it is desired to extinguish the fire quickly in case of an emergency such as an earthquake, but since the fire was extinguished rapidly, a large amount of unburned gas was released to the surrounding area and a strong odor was generated. For this reason, during normal fire extinguishing, the wick is lowered to a position where the vent does not open to prevent rapid fire extinguishing. There are things aimed at extinguishing fire without.

  However, if the vent hole is closed during normal fire extinguishing, air flows from the upper part of the core housing cylinder to above the core. At this time, the gap of the core housing cylinder is cylindrical. In the other part, oil gas is raised and discharged, and the flame remaining above the core is extinguished while burning around so that the temperature of the core containing cylinder is unlikely to decrease, Fire extinguishing time may be longer.

  In addition, the flame that remains above the core tends to remain in the part where the amount of supplied air increases, but it cannot be specified where in the gap between the cylindrical core housing cylinders that much air flows, and Because the position where the flame remains changes, the fire extinguishing time tends to vary.Depending on the position where the flame remains, the fire extinguishing time may become abnormally long, or conversely, the fire extinguishes immediately and may cause a bad odor. It was.

  As a countermeasure against this, there is an opening provided separately from the air circulation hole in the core outer cylinder wall surface at a position higher than the core lowering position for normal fire extinguishing, and the opening is not formed uniformly around the entire circumference but is formed sparsely and densely. The amount of air flowing into the upper part of the core 4 during normal fire extinguishing is small in the sparse part and large in the dense part.

For this reason, flames remain in dense parts with a large amount of air, flames do not remain in sparse parts with a small amount of air, and the temperature of the core housing cylinder is increased in the sparse parts while burning oil gas in the dense parts. Since it can be reduced, the fire extinguishing time can be stabilized.
Japanese Utility Model Publication No. 49-47225

  By the way, recently, development of a combustion part that hardly causes incomplete combustion even if the amount of combustion is reduced has progressed, and it has become possible to change to a desired amount of combustion by adjusting the height of the lead.

  However, if the wick is lowered and used for small combustion, the distance between the wick containing cylinder and the point where the wick burns becomes closer, and the temperature of the wick containing cylinder becomes high, which promotes the vaporization of kerosene during fire extinguishing. Trouble that the amount of oil gas to vaporize increases, the flame remains on the entire circumference of the core, and it becomes impossible to lower the temperature of the core container, the fire extinguishing time becomes abnormally long, or sometimes the fire cannot be extinguished There was a risk of causing.

  Also, since the fire extinguishing performance of oil combustors varies depending on the amount of heat generated and the difference in the combustor, the diameter and arrangement of the openings are determined by experiments, but the structure is complicated by the method of forming the openings sparsely and densely. The development period was long. Furthermore, the problem that processing is troublesome at the time of manufacture and productivity deteriorates remains.

The present invention solves the above-mentioned problem. A core 4 is mounted in a gap of a core housing cylinder 3 constituted by a core inner cylinder 1 and a core outer cylinder 2 so as to be movable up and down. A device 6 is provided, and the wall of the core housing cylinder 3 is placed on the wall surface of the core outer cylinder 2 at a position lower than the upper end position of the core 4 at the combustion position and higher than the upper end position of the core 4 at the normal fire extinguishing position. In an oil combustor in which an opening 9 is provided and air flows into the upper part of the core 4 from the opening 9 by the core 4 lowered to the normal fire extinguishing position, the openings 9 are formed in the core outer cylinder 2 at equal intervals. Te, stop the process before opening 9 reaches the entire periphery of the core barrel 2, the spacing wide Kunar imperforate portion 10 of the opening 9 one place between the start of the processing from the processing of stop By providing, the fire extinguishing mechanism of the oil combustor can be manufactured.

  As described above, according to the present invention, the opening 9 is provided at a position higher than the normal fire-extinguishing core lowering position of the wall surface of the core outer cylinder 2, and the opening 9 is not evenly arranged with respect to the entire circumference of the core outer cylinder 2. Since the non-hole portion 10 is provided by filling the opening 9, the oil gas concentration in the non-hole portion 10 becomes thick during normal fire extinguishing, and the flame tends to remain in the vicinity of the openings 9 on both sides of the non-hole portion 10. The remaining position could be specified.

  Further, when the small flame remaining above the core 4 rotates, the flame does not turn around the non-hole portion 10 without air inflow, so the temperature of the non-hole portion 10 can be lowered in a short time, Due to the temperature drop of the portion 10, the surrounding heat was taken away, the temperature of the entire core housing cylinder 3 was easily lowered, and the fire extinguishing time could be shortened.

  In this way, immediately after the fire is extinguished, the position of the flame remaining above the core 4 is specified, and in the process of extinguishing, the temperature of the core accommodating cylinder 3 is surely lowered. Fire extinguishing performance can be obtained.

  Furthermore, with this structure, the temperature of the core housing cylinder 3 can be reliably lowered even when a fire extinguishing operation is performed during small combustion, so that the fire extinguishing time becomes abnormally long or cannot be extinguished. The fear is gone.

  In addition, even when the diameter and arrangement of the opening 9 are changed depending on the amount of heat generated by the oil combustor and the combustion part, it is easier to find the optimum position by identifying the position where the flame remains, and the development period can be shortened. Can do.

  Further, since the non-hole portion 10 has openings 9 formed in the core outer cylinder 2 at a predetermined interval and can be configured by a method of widening only a part, the processing is simplified, the productivity is improved, and the manufacturing cost is increased. Was reduced.

  Further, if the opening 9 is formed by a group of a plurality of small holes 9a and the number of small holes 9a arranged on both sides of the non-hole portion 10 is larger than that of the other portions, the amount of air on both sides of the non-hole portion 10 is increased. Because it is possible to make more than other parts, it became easier to specify the position where the flame remains when extinguishing fire, and the stability during fire extinguishing could be increased.

  This configuration will be described with reference to the drawings showing an embodiment. 1 is a core inner cylinder, 2 is a core outer 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 housing cylinder 3. A core 11 movably moved up and down in the gap 11 is an oil tank located below the core housing cylinder 3, and the lower end of the core 4 is immersed in fuel in the oil tank. It is sucked up at the lower end and supplied above the core 4.

  6 is a core raising / lowering device for moving the core 4 up and down, and 12 is a combustion cylinder mounted on the upper part of the core housing cylinder 3, and the core 4 is moved up by the core lifting apparatus 6 to accommodate the upper end of the core 4 When projecting upward from the cylinder 3 and igniting by an ignition device such as an ignition heater, the fuel sucked up under the core 4 starts to burn at the upper end of the core 4, and the generated combustion flame and combustion gas are combusted with the combustion cylinder 12. Above that, the combustion ends.

  5 is an air chamber in which the core lifting device 6 is accommodated adjacent to the outside of the core outer cylinder 2, 7 is an air flow hole for communicating the air chamber 5 with the outside air, and 8 is a gap between the core housing cylinder 3 and the air chamber. 5, a part of the petroleum gas vaporized from the core 4 diffuses into the air chamber 5 through the vent 8, and air flows into the air chamber 5 from the air circulation hole 7. Thus, a mixed gas is formed in the air chamber 5.

  The vent 8 is opened by lowering the tip of the wick 4 to a position lower than the vent 8 during the fire extinguishing operation. Therefore, the mixed gas in the air chamber 5 is ignited by the flame at the tip of the wick 4 and air. The flame 5 explosively burns in the chamber 5, and the generated combustion gas blows off the flame at the tip of the core 4 by the wind pressure when entering the gap between the core housing cylinder 3 through the vent hole 8 to quickly extinguish the fire.

  By the way, recent oil combustors need to operate an automatic fire extinguisher in an emergency such as an earthquake to quickly extinguish the fire, and the above fire extinguishing structure is effective as a fire extinguishing method in this emergency, but extinguished rapidly. For this reason, there is a drawback that a large amount of unburned gas is released to the surroundings and gives off a bad odor, which makes the user uncomfortable. Liked.

  For this reason, the descent position of the wick 4 is set higher than the vent 8 so that it does not explosively burn during normal fire extinguishing, and a petroleum gas that is vaporized from the wick 4 when a flame is drawn into the gap of the wick accommodating cylinder 3. Fire extinguishing without foul odors by reducing the amount of air, the amount of air supplied above the wick 4 is reduced, and the flame is gradually reduced. It is carried out.

  At this time, although a small flame such as a fire is left in a part of the core 4, air flows into the upper part of the core 4 from the upper part of the core housing cylinder 3, and in a part of the gap of the cylindrical core housing cylinder 3. Since the air flows in so as to descend and the oil remaining in the other parts rises and discharges, the flame remaining above the core 4 is extinguished while burning around, so the temperature of the core accommodating cylinder 3 decreases. There are drawbacks that are difficult to do.

  Further, since the position of the air flowing in from the upper part of the core housing cylinder 3 changes every time, the position where the flame remains cannot be specified, and depending on the position where the flame remains, the oil gas vaporized from the core 4 and the amount of air flowing in change. As a result, the fire extinguishing time was likely to vary.

  As a countermeasure, 9 is an opening provided in the wall surface of the core outer cylinder 2 at a position higher than the core lowering position for normal fire extinguishing, and the openings 9 are arranged at a nonuniform pitch around the entire circumference of the core outer cylinder 2, By changing the size, it is formed so as to be sparse / dense on the entire circumference of the core outer cylinder 2, and the opening 9 sparsely reduces the amount of air that flows above the core 4 when the core is lowered for normal fire extinguishing. There are few in the part, and more in the dense part.

  For this reason, flames remain in dense parts with a large amount of air, flames do not remain in sparse parts with a small amount of air, and the position where the flames remain can be identified, and oil gas is burned in the dense parts, while sparse Since the temperature of the core accommodating cylinder 3 can be lowered at the portion, the fire extinguishing time can be stabilized.

  However, when the wick 4 is lowered and used in small combustion during use of the oil combustor, the wick accommodating cylinder 3 is at a high temperature, and the amount of oil gas that is vaporized from the wick 4 during normal fire extinguishing increases, and the wick accommodating cylinder. As a result, flames remained on the entire circumference of the cylinder 3, and the temperature of the core housing cylinder 3 could not be lowered in a short time, and the fire extinguishing time could become abnormally long or sometimes cause a trouble that the fire extinguishing was impossible.

  This invention solves the above problem and realizes a fire extinguishing structure that can stabilize the fire extinguishing time even during small combustion. 10 is a part of the opening 9 arranged in the wall surface of the core outer cylinder 2 continuously. In the non-hole portion 10, the interval between the openings 9 is wider than other portions.

  When the lead 4 is lowered during normal fire extinguishing, a flame is drawn into the gap of the lead containing cylinder 3, so that the flame above the lead 4 becomes small and burns. At this time, air flows from the opening 9 to lower the temperature of the core housing cylinder 3 and reduce the oil gas concentration above the core 4. However, since the air does not reach the non-hole portion 10, compared with other portions. The temperature is high and the oil gas concentration is high.

  For this reason, when the flame above the core 4 becomes small, it tends to remain in the vicinity of the openings 9 on both sides of the non-porous portion 10 where the oil gas in the non-porous portion 10 and the air flowing in from the opening 9 mix. The remaining position can be stabilized.

  The flame remaining above the wick 4 burns the petroleum gas that evaporates from the wick 4 while moving in the gap of the wick accommodating cylinder 3. However, since the non-hole portion 10 is short of air, the flame is not pierced. It disappears at the end of 10, the flame moves only at the portion where the openings 9 are arranged at a constant interval, and the temperature can be lowered in a short time in the non-hole portion 10 where the flame does not turn.

  Furthermore, since the temperature of the non-hole portion 10 is lowered, the heat of the portion where the flame is moving is taken away, and the temperature of the entire core housing cylinder 3 is gradually lowered, so that the amount of petroleum gas vaporized from the core 4 is small. The fire was extinguished and the fire extinguishing time was stabilized.

  If it is this structure, even if it uses by small combustion and the temperature of the core accommodating cylinder 3 becomes high temperature, a flame does not go around the non-hole part 10, but the temperature of the core accommodating cylinder 3 can be reduced reliably. As a result, there is no longer a risk that the fire extinguishing time will be abnormally long or that it will be impossible to fire.

  In addition, since the fire extinguishing performance of oil combustors varies depending on the amount of heat generated and the combustor, the diameter and arrangement of the openings 9 are determined by experiment, but it is easy to find the optimal position by identifying the position where the flame remains. became.

  Further, as an example when the opening 9 is provided in the core outer cylinder 2, the openings 9 are formed in the core outer cylinder 2 at equal intervals, and the machining is stopped before the opening 9 reaches the entire circumference of the core outer cylinder 2. Since the non-hole part 10 can be formed by the method of carrying out, processing was simplified and productivity could be improved.

  On the other hand, in order to quickly reduce the temperature of the core housing cylinder 3 immediately after the fire is extinguished, it is preferable that the amount of air flowing in from the opening 9 is as large as possible. However, if the diameter of the opening 9 is large, the flow velocity of air passing through the opening 9 is high. As a result, the flame at the upper end of the lead 4 may be blown out.

  In the embodiment shown in FIG. 2, 9a is a plurality of small holes constituting the opening 9, and a plurality of the small holes 9a are arranged at regular intervals, and the total cross-sectional area of the small holes 9a is The cross-sectional area of the opening 9 is comparable, and the number of small holes 9a is larger on both sides of the non-hole portion 10 than on the other portions.

  For this reason, since the air passing through the small hole 9a has a low flow velocity, there is no fear that the flame is blown out, and the total cross-sectional area of the small hole 9a is comparable to the cross-sectional area of the opening 9, so that a constant amount of air is required. Inflow is possible, and since the number of small holes 9a is increased on both sides of the non-hole portion 10, the amount of air flowing in is larger than in other portions.

  If the oil gas concentration in the non-hole portion 10 is high and the amount of air in the small holes 9a on both sides of the non-hole portion 10 increases, the flame remaining above the core 4 is always near the small holes 9a on both sides of the non-hole portion 10. As a result, it became easier to specify the position where the flame remains, and the reliability of fire extinguishing could be increased.

It is sectional drawing of the oil combustor which shows the Example of this invention. It is principal part sectional drawing of the oil combustor which shows the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 core inner cylinder 2 core outer cylinder 3 core accommodation cylinder 4 core 5 air chamber 6 core up-and-down apparatus 7 air circulation hole 8 vent 9 opening 9a small hole 10 non-hole part

Claims (1)

A core 4 is attached so as to be movable up and down in a gap between a core housing cylinder 3 constituted by a core inner cylinder 1 and a core outer cylinder 2.
While providing a core lifting device 6 that moves the core 4 up and down,
An opening 9 is provided in the wall surface of the core outer cylinder 2 at a position lower than the upper end position of the core 4 at the combustion position and higher than the upper end position of the core 4 at the normal fire extinguishing position. ,
In the oil combustor in which air flows into the upper part of the core 4 from the opening 9 by the core 4 that is lowered to the normal fire extinguishing position,
The openings 9 are formed at equal intervals in the core outer cylinder 2, and the machining is stopped before the openings 9 reach the entire circumference of the core outer cylinder 2, and between the machining stop portion and the machining start portion. method for producing extinguishing mechanism of oil combustor spacing of the opening 9, characterized in that a wide Kunar imperforate portion 10 one place to.

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