JPS6140887B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention reduces the extinguishing time of a pot-type oil combustor to 10
This relates to a fire extinguishing system that can shorten the time to less than seconds.

[Conventional technology]

Conventional pot-type oil combustors supply fuel into a pot, create a gas mixture by vaporizing oil and combustion air, and combust the gas mixture. Even during combustion, the fuel remains in the pot. Since oil droplets or moisture were present on the bottom surface, combustion continued for 3 to 5 minutes after fuel supply was stopped.
Furthermore, the fuel supply structure, as in Utility Model Publication No. 38-21084, is one in which fuel and air are supplied together into a pot, but this does not significantly improve the extinguishing time.

[Problem that the invention seeks to solve]

By the way, in the structure where fuel and air are supplied together into the pot, some of the fuel is vaporized in the air pipe and then blown into the pot, so the time that the fuel stays in liquid form in the pot is short and the fuel is If the supply is cut off, the fire will weaken almost instantly. However, since the airflow in the air pipe continues due to the ventilation force in the combustion chamber or the blower, the vaporized petroleum gas adhering to the air pipe is sent into the pot and continues to burn in a small flame at the tip of the air pipe 6. It was hot.

[Means for solving problems]

This invention extremely shortens the extinguishing time. 1 is a blower, 2 is a combustion air outlet, 3 is an air passage connecting the combustion air outlet 2, and 4 is a pot located within the air passage 3. Combustion air is sent into the air passage 3 from the combustion air outlet 2 by the blower 1, and into the pot 4 through a large number of small holes 5 formed in the side wall of the pot 4. Reference numeral 6 denotes an air pipe connecting the inside of the pot 4 and the air passage 3 including the fan case of the blower 1, and a part of the combustion air is sent from the air pipe 6 into the pot 4 by the blower 1. 7 is an oil pipe connected to the air pipe 6, and the fuel is sent to the air pipe 6.
It is mixed with air and supplied to pot 4.

8 is a branch pipe attached to the air pipe 6, and an air suction device 15 is attached to the tip of the branch pipe 8. Then, the air pipe 6 from the connection part between the air pipe 6 and the oil feed pipe 7 to the pot 4 is installed in a downward slope, and the air suction device 15 is operated after the oil supply to the oil feed pipe 7 is stopped, and the air in the air pipe 6 is transferred to the branch pipe. 8.

Reference numeral 9 indicates a mixing plate installed in the pot 4, and 10 indicates a combustion chamber located above the pot. A skeleton 11 is attached inside, and heat rays are radiated from the skeleton 11 which becomes red hot due to combustion heat. 12 is oil pipe 7
This is an oil amount regulator attached to the oil amount knob 13, and the oil amount knob 13 can be used to stop the fuel and vary the flow rate to an arbitrary value, and the main switch 16 that is linked to the oil amount knob 13 can be used to start and stop the combustor. 14 is an operating pin attached to the oil amount regulator 12, and a solenoid 15
Opening/closing or variable flow rate operation is performed by a movable body 17. In the embodiment, the solenoid 1 is used as an air suction device to suck air in the air pipe 6 to the branch pipe 8.
5 is utilized, and air is sucked by the piston movement of the movable body 17.

Reference numeral 18 denotes an orifice attached to the air pipe 6 between the air passage 3 and the connection part of the branch pipe 8, so that most of the air sucked into the branch pipe 8 is supplied from the pot 4 side.

[Effect]

This invention having the above-mentioned configuration is also completely unchanged from conventional products in terms of operations and operations from ignition to extinguishing.

That is, in the embodiment, the oil amount knob 13 during ignition operation
When turned, the oil amount regulator 12 becomes open and the oil feed pipe 7
The main switch 16, which supplies fuel to the burner controller and supplies electricity to a burner controller (not shown), is closed and the blower 1 rotates. The burner controller appropriately drives the igniter and solenoid 15 to start combustion. For fire extinguishing operation during steady combustion, when the oil volume knob 13 is turned in the reverse direction, the oil volume regulator 12 closes and stops the fuel in the oil feed pipe 7, and the main switch 16 opens, causing the burner controller to perform post-purge operation and blower 1. continues to rotate. When the fire is completely extinguished, the post purge ends and the blower 1 stops.

On the other hand, in the conventional example, an air pipe 6 is provided to communicate the inside of the pot 4 and the air passage 3, and an oil pipe 7 is connected to the air pipe 6, so that air and fuel are sent to the pot 4 in a coexisting state. The pot 4 side of the air pipe 6 is at a high temperature due to the heat of combustion, and the fuel is also vaporized within the air pipe 6. Due to the volume increase, air and fuel are blown into the pot 4 in a high-speed flow, and the fuel is finely blown into the pot 4. It scatters as oil droplets and vaporizes instantly. For this reason, if the fuel supply is stopped during extinguishing operations, the flame inside pot 4 will suddenly become smaller, and the flame will be directly extinguished from pot 4.
It has a feature that the extinguishing time is shorter than that in which the oil pipe 7 is connected.

In this invention, since the air pipe from the connecting part between the air pipe 6 and the oil pipe 7 to the pot 4 is sloped downward, the fuel adhering to the wall of the air pipe 6 flows toward the pot 4 located below, and vaporization is promoted. The oil pipe 7 is away from the pot 4 and has a low temperature. For this reason, when the fuel supply is stopped during fire extinguishing operations, the fuel in the oil pipe 7 hardly evaporates and the fuel remaining in the air pipe 6 is small, so it remains at the tip of the air pipe 6 compared to an air pipe 6 without a slope. The flame became small.

Furthermore, in this invention, a branch pipe 8 is attached to the air pipe 6, and an air suction device 15 is attached to the other end of the branch pipe 8. When the air suction device 15 is operated after the oil supply to the oil pipe 7 is stopped during fire extinguishing operation, the air path is closed. The air flowing from the pot 3 to the pot 4 flows to the branch pipe 8, and the gas in the air pipe 6 on the pot 4 side also flows to the branch pipe 8. For this reason, after a few seconds of extinguishing operation, the flame remaining at the tip of the air pipe 6 becomes smaller after the refueling is stopped.
When the gas inside is sucked into the branch pipe 8, the air pipe 6
The flame remaining at the tip is also sucked into the air pipe 6, and the combustion flame is instantly extinguished.

〔effect〕

As described above, this invention completely extinguishes the fire when the air in the air pipe is sucked into the branch pipe after the oil level has stopped.
The delay from stopping the oil flow until air is sucked into the branch pipe becomes the extinguishing time, and the JIS standard 10 seconds extinguishing time for a time-release oil combustor with an air pipe that slopes downward toward the pot can be fully realized. It became. For this reason, an oil combustor using a pot could not be used as a combustion mechanism in an open type oil combustor due to the long extinguishing time, but the fire extinguishing system of this invention has made this possible, and the oil combustor using a pot This is a practical invention that greatly expands the 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. 1... Blower, 2... Air outlet, 3... Air path, 4
...Pot, 5...Small hole, 6...Air pipe, 7
... Oil pipe, 8 ... Branch pipe, 15 ... Air suction device, 17 ... Movable body.

Claims (1)

[Claims] 1. A blower 1 that supplies combustion air; and the blower 1.
An air passage 3 connecting the combustion air outlet 2 of the pot, a pot 4 located within the air passage 3 and having a large number of small holes 5 in the side wall, and an air pipe communicating the inside of the pot 4 and the air passage 3. 6, and an oil feed pipe 7 connected to the air pipe 6, the air pipe 6 from the connection part between the air pipe 6 and the oil feed pipe 7 toward the pot 4 is sloped downward, and the air pipe 6 is provided with a branch pipe. 8 and connect the air suction device 15 to the tip of the branch pipe 8.
A fire extinguishing system for an oil combustor, characterized in that the air suction device 15 is operated after the fuel supply to the oil supply pipe 7 is stopped, and the air in the air pipe 6 is sucked into the branch pipe 8. 2. The fire extinguishing system for an oil combustor according to claim 1, wherein the air suction device 15 is constituted by a solenoid that attracts and separates the movable body 17 installed therein.