JPH0512605Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in the structure of an auxiliary tank for supplying fuel in a siphon nozzle type liquid fuel combustion device.

Prior Art A known liquid fuel combustion device, as shown in FIG.
6 is sucked up to the siphon nozzle 20 through the suction pipe 18, and the fuel is atomized by the siphon nozzle 20 using air blown from the air pump 22, thereby burning the fuel. It is being

As for the structure of the auxiliary tank, in the auxiliary tank 16 which has a cylindrical or rectangular structure as shown in FIG.
0, and the electromagnetic pump or fuel supply pump 1
A structure is known in which the tip of the delivery pipe 12 connected to the delivery pipe 12 is positioned higher than the tip of the overflow pipe 24, and the tip of the suction pipe 18 is positioned slightly lower than the overflow pipe 24. Note that 26 is an air vent pipe located above the auxiliary tank 16.

In the above-mentioned configuration, with the conventional auxiliary tank, if moisture in the air in the fuel tank 10 condenses due to cold air, etc., or if the tank 10 is not tightly sealed, water may enter the tank. Therefore, when water, which has a higher specific gravity than fuel oil or heavy oil, is sucked up into the auxiliary tank 16, it is configured to accumulate at the bottom.

Therefore, of the fuel sucked up, only oil flows from the suction pipe 18 to the siphon nozzle 20.
can be supplied as fuel to

Problems that the invention aims to solve However, as the device continues to operate, water gradually accumulates in the auxiliary tank, and water may eventually accumulate up to the suction pipe's suction port.

In such a case or when a large amount of water is supplied from the bottom of the tank, the safety device of the device is configured to activate and stop the operation of the device.

However, in cold regions, if the device is left stopped, water may freeze and block the lower end of the suction pipe or the upper end of the overflow pipe.

Therefore, when the operation is restarted in such a state, there is a problem that the fuel supplied from the fuel supply pump leaks from the air vent pipe as shown in FIG. 4.

In view of the drawbacks of the prior art, an object of the present invention is to provide an auxiliary tank structure that has a simple structure, reduces water accumulation in the auxiliary tank, and prevents fuel leakage from the auxiliary tank. do.

Means for Solving the Problems In other words, the present invention forms the bottom of the auxiliary tank into an inverted conical shape or an inverted hemispherical shape, positions the suction pipe communicating with the nozzle near the bottom of the auxiliary tank, and connects the fuel supply pump to the bottom of the auxiliary tank. The delivery pipe connected to the auxiliary tank is also located near the bottom of the auxiliary tank, and the auxiliary tank structure in a liquid fuel combustion device is such that the tip of the delivery pipe is lower than the tip of the suction pipe. achieve.

Function: In the structure of the auxiliary tank according to the present invention, fuel normally supplied from the fuel supply pump is guided into the auxiliary tank via the delivery pipe.

Due to the fact that the tip of the delivery pipe is located near the bottom of the auxiliary tank, the bottom is formed in an inverted conical or hemispherical shape, oil is sucked from the tip of the suction pipe, and the rotation of the earth A vortex is generated in the auxiliary tank and the fuel is stirred, so that it is mixed with the oil in the upper part of the auxiliary tank, and the mixed fuel is supplied to the siphon nozzle via the suction pipe.

Therefore, even if water is mixed in the fuel, it is mixed with oil in the auxiliary tank and is discharged through the suction pipe to the siphon nozzle.

In addition, if the auxiliary tank is stopped with a large amount of water mixed in, and the water freezes, the tip of the suction pipe and the tip of the delivery pipe will be blocked by the freezing water, so if it starts again. This prevents fuel from being supplied from the fuel supply pump.

Embodiment The present invention will be explained in detail below according to the embodiment shown in FIG.

In the figure, 1 is an auxiliary tank, and the bottom of the auxiliary tank 1 has an inverted conical or inverted hemispherical structure.

Reference numeral 2 denotes an overflow pipe installed at the center of the auxiliary tank 1, and the upper end of the overflow pipe 2 is positioned above the inside of the auxiliary tank.

A delivery pipe 4 is connected to the fuel supply pump 5 to lead fuel from a fuel tank (not shown), and the tip of the delivery pipe 4 is configured to be near the bottom of the auxiliary tank.

A suction pipe 6 is installed at a position symmetrical to the delivery pipe 4 with respect to the overflow pipe 2, and the tip of the suction pipe 6 is also located near the bottom of the auxiliary tank 1.
The tip of the suction pipe 6 is positioned slightly higher than the tip of the delivery pipe 4. 8 is an air vent pipe.

In the auxiliary tank structure according to this embodiment with the above-described configuration, fuel sucked up from the fuel tank by the fuel supply pump 5 is supplied into the auxiliary tank 1 via the delivery pipe 4.

At this time, because the bottom of the auxiliary tank 1 is formed in an inverted conical or hemispherical shape, and the tip of the delivery pipe 4 is located near the bottom of the auxiliary tank 1, the fuel swirls near the bottom. The fuel is mixed with the fuel already stored in the auxiliary tank 1.

Since the tip of the suction pipe 6 is located near the bottom of the auxiliary tank 1 and is located opposite the outlet of the delivery pipe 4, even if the fuel is contaminated with water from the fuel tank, Even if it is supplied, it is immediately discharged from the suction pipe 6 toward the siphon nozzle in a mixed state with fuel.

When the amount of water in the fuel in the auxiliary tank 1 increases and the device is stopped, the dispersed water is separated into water and fuel.

Therefore, the water freezes at the bottom of the auxiliary tank, and when it freezes, it blocks the tips of the delivery pipe 4 and suction pipe 6.

Generally, only the tip portion of the delivery pipe 4 is closed.

Therefore, the auxiliary tank 1 from the fuel supply pump 5
Since the supply of fuel to the auxiliary tank 1 is stopped, fuel will not leak from the auxiliary tank 1 through the air vent pipe.

Effects As mentioned above, the present invention differs from the conventional auxiliary tank structure by changing the conventional idea of separating water and oil and changing the positional relationship of the pipes so that water and oil can mix. By making this change and changing the structure of the bottom of the auxiliary tank, it is possible to prevent water from accumulating in the auxiliary tank.

Furthermore, since it is difficult for water to accumulate in the auxiliary tank, it is possible to eliminate the inconvenience of stopping the apparatus due to the supply of water to the apparatus.

Furthermore, even if a large amount of water had accumulated and the equipment was stopped in a cold region, fuel would leak from the air vent pipe with the conventional model, but we now have a structure in which the delivery pipe is blocked. Therefore, fuel leakage can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the structure of the auxiliary tank according to the present invention, Fig. 2 is a front view showing a conventional fuel combustion device, and Figs. 3 and 4 show the structure of the conventional auxiliary tank. FIG. 1, 16... Auxiliary tank, 2... Overflow pipe, 4, 12... Delivery pipe, 5...
... Fuel supply pump, 6, 18 ... Suction pipe, 8, 24 ... Air bleeding pipe, 10 ... Fuel tank, 20 ... Siphon nozzle, 22 ...
air pump.

Claims (1)

[Scope of utility model registration request] A liquid fuel combustion device configured to supply fuel from a lower fuel tank through a delivery pipe to an auxiliary tank with a fuel supply pump, and from the auxiliary tank to a siphon nozzle through a suction pipe. In the auxiliary tank, the bottom of the auxiliary tank is formed into an inverted conical or hemispherical shape, and the suction pipe communicating with the nozzle is located near the bottom of the auxiliary tank, and the delivery pipe connected to the fuel supply pump is also auxiliary. An auxiliary tank structure for a liquid fuel combustion device, characterized in that the tank is positioned near the bottom of the tank, and the tip of the delivery pipe is formed to be lower than the tip of the suction pipe.