JPS6314205Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a structure that detects abnormal combustion in an oil combustor in advance and automatically extinguishes the oil combustor.

[Conventional technology]

Oil combustors are required to be equipped with automatic seismic fire extinguishing devices, and if a large earthquake occurs during normal combustion, the
Fires can now be extinguished in less than seconds. For this reason, the idea of activating an automatic fire extinguishing system using signals from various sensors to respond to abnormal combustion was proposed in Utility Model Publication No. 55-786 and Utility Model Publication No. 56-20707.

On the other hand, oil combustors, which have a flame expander positioned above the combustion wick and burn oil with a white-yellow flame, generate black smoke during abnormal combustion, compared to those that generate carbon monoxide during abnormal combustion. It is very safe because it does not cause gas poisoning accidents, but it has the disadvantage of turning the interior of the room where the oil burner is used completely black. For this reason, in Utility Model Publication No. 16826/1986, there is a device that detects black smoke using an electrode plate and activates an automatic fire extinguishing device.

[Problem that the invention attempts to solve]

By the way, when detecting normal combustion and abnormal combustion based on temperature as in Utility Model Publication No. 55-786 and others, in a wick type oil combustor that burns by self-venting combustion, the temperature is unstable and the start of abnormal combustion cannot be detected by temperature. It is difficult to detect, and the automatic fire extinguishing system is likely to activate only after abnormal combustion has started.
In No. 16826, the automatic fire extinguishing system was activated after abnormal combustion occurred and black smoke was generated.

In addition, even if an anti-seismic automatic fire extinguishing system can guarantee extinguishment for 10 seconds during normal combustion, the probability of extinguishing the fire decreases after abnormal combustion occurs, and in order to use an automatic anti-seismic extinguishing system, abnormal combustion will occur. We need to detect warning signs.

[Means for solving problems]

This device automatically extinguishes the oil combustor by detecting smoke caused by abnormal combustion in a white-yellow flame oil combustor before it occurs. 1 is a combustion wick, and 5 is a flame expansion device located above the combustion wick 1. , 4 is an air rectifying cylinder located on the side of the combustion wick 1. The air rectifying cylinder 4 has a small hole 2 in the lower part and a non-porous part 3 in the upper part. A large amount of air is supplied to the outside of 1 at a slow speed. 6 is a bimetal fixed to the non-perforated portion 3 of the air straightening tube 4, 7 is a vibration sensing weight of an anti-seismic automatic fire extinguishing system attached to the oil burner, 8 is a locking part that stops the operation of the fire extinguisher, and 9 is a locking part. This is an engagement piece that drives the stop portion 8. The bimetal 6 is linked to a vibration-sensitive weight 7 or an engaging piece 9, and when the bimetal 6 is deformed due to temperature, the vibration-sensitive weight 7 is brought down or the locking part 8 is directly connected to the vibration-sensitive weight 7 via the engaging piece 9. This activates the automatic fire extinguishing system.

Many different types of automatic fire extinguishing systems are currently in practical use, all of which are sufficiently reliable, and the example shown is one in which the combustion wick 1 is lowered to automatically extinguish the fire. In this structure, the return spring 11 is wound up by the upper and lower core knobs 10, and the gear 12 meshes with the locking part 8 to maintain the stored force of the return spring 11. If the wick upper and lower knobs 10 are reversed, the combustion wick 1 can be lowered while the return spring 11 is wound up and held by the action of the clutch part 13, and the fire can be extinguished manually.

In addition to the engagement piece 9, the locking portion 8 is attached with an interlocking plate 14 for driving the locking portion 8, and a vibration-sensitive weight 7 is attached to the locking portion 8.
The locking part 8 is driven via the overturning interlocking plate 14, and the combustion wick 1 can be automatically lowered by the force of the return spring 11.

15 is a wick guide tube, 16 is an oil tank, and 17 is a flame tube in which the flame spreader 5 is installed.

[Explanation of action]

With the above configuration, if the bimetal 6 deforms while the combustor is in use, the automatic fire extinguishing device is activated and the oil combustor is automatically extinguished. By the way, this idea has a small hole 2 in the lower part of the air rectifying cylinder 4 and the upper part is made into a non-porous 3 part.
The small hole 2 portion was constantly heated, and the small hole 2 portion was cooled by the combustion air passing through the small hole 2.

Therefore, in a normal combustion state, the non-porous portion 3 to which the bimetal 6 is attached receives combustion heat, while the small hole 2 portion radiates and cools the heat through heat conduction, so that the temperature remains stable and the bimetal 6 does not deform. When the amount of vaporization from the combustion wick 1 abnormally increases and the amount of air corresponding to the amount of vaporization cannot be obtained, causing abnormal combustion,
The combustion heat that begins to increase heats the non-porous part of the air straightening tube 4 and exceeds the cooling effect of the small perforated part, so the bimetal 6 rapidly reaches a high temperature and activates the automatic fire extinguishing system before black smoke is generated due to abnormal combustion. It is operated in the following manner.

On the other hand, if the amount of air passing through the small holes 2 of the air baffle plate 6 decreases for some reason, abnormal combustion will occur due to the lack of air amount, but the air baffle plate 6 will be sufficiently cooled by the amount of air passing through the small holes 2. Since the temperature of the non-porous portion 3 increases, the bimetal 6 deforms and activates the automatic fire extinguishing device.

[Explanation of effects]

As mentioned above, with this invention, even when the amount of oil vaporized abnormally increases compared to the amount of air supplied to the combustor,
In addition, even when the amount of air supplied is reduced due to dust or other factors compared to the normal amount of oil vaporized, the automatic fire extinguishing system is always activated and extinguishes the oil combustor before black smoke is generated due to abnormal combustion, leaving the room completely black. This prevents the troubles that would otherwise occur.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of this device, and FIGS. 2 and 3 are sectional views of the main parts. 1... Combustion wick, 2... Small hole of air rectifier tube, 3...
...Non-porous part of the air straightening tube, 4...Air straightening tube, 5
... Flame spreader, 6 ... Bimetal, 7 ... Vibration-sensitive weight, 8 ... Locking part, 9 ... Locking piece.

Claims (1)

[Scope of utility model registration request] An air rectifying tube 4 having a small hole 2 at the bottom and a non-porous hole 3 at the top is attached to the outside of the combustion wick 1, and a flame spreader 5 is positioned above the combustion wick 1. In a white-yellow-flame oil combustor that supplies a large amount of air at a slow speed to both sides, a bimetal 6 is fixed to the three non-porous portions of the air rectifying tube 4, and is attached to the drive end of the bimetal 6 and the oil combustor. The oil is connected to the vibration-sensing weight 7 of the anti-seismic automatic fire extinguishing system or the engaging piece 9 that drives the locking part 8 that stops the operation of the fire extinguishing system, and activates the automatic fire extinguishing system when the temperature of the air rectifying tube 4 rises. Automatic fire extinguishing system for combustor.