JPS5827288Y2 - liquid fuel combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates in particular to improvements in a liquid fuel combustion device such as an oil combustor having a wick, and a fuel tank in which a wick outer cylinder is integrally combined.

Conventional fuel tanks of this type have the following characteristics: As shown in FIG. 4, a lower tank 2 to which a core guide tube 1 is fixed is connected to an upper tank 4 having an opening 3, and an outer core tube 5 is attached to cover the opening 3.

6 is a lamp wick, and 7 is a part that receives the cap of the cartridge tank.

As a method for liquid-tightly attaching the lower end flange 8 of the outer core cylinder 5 to the peripheral edge of the opening 3 of the upper tank 4, the following configuration was adopted.

That is, the backing 9 is placed around the opening of the upper tank 4.
In addition to providing an annular recess 10 for receiving the screw, a plurality of through holes (usually four) are provided outside the recess, and the shaft of the screw 11 is inserted into the through hole, and the head is inserted into the inner surface of the upper tank 4. A wing nut 12 was screwed onto the end of a screw passed through the flange 8 of the outer cylinder 5 by spot welding, and the backing 9 was tightened between the upper tank 4 and the flange 8.

However, as described above, the method of fixing the head of the screw 11 to the upper tank 4 by spot welding is not consistent in quality because there is a risk of oil leakage due to poor welding.
Furthermore, welding the tank 4 made of a material such as a galvanized steel plate to the hesspot 1 requires post-treatment such as painting, which has the drawback of increasing the manufacturing process of the tank 4 and increasing the cost.

Also, when replacing the lamp wick 6 or cleaning the inside of the tanks 2 and 4, it is necessary to remove the wing nut 12, but since it is tightened tightly to prevent oil leakage, only a tool such as a screwdriver is required. It was difficult to remove the butterfly nut 12 in ordinary households where there is no such thing.

The present invention aims to eliminate the above-mentioned conventional drawbacks and provide a tank that does not leak oil and is convenient for replacing lamp wicks.

The present invention will be explained below with reference to FIG. 1 showing one embodiment thereof.

Note that the same components as those in the conventional example described above are given the same numbers and their explanations are omitted.

Reference numeral 13 in FIG. 1 denotes a plurality of through holes, for example four, provided outside the opening periphery recess 10 of the upper tank 4. Part 14
a has a plurality of protrusions 14b, and an internal threaded portion 14
The upper opening of the bottom metal fitting 14 having the shape C is fixed by caulking.

In addition, 14d is the caulking part, and this caulking causes the protrusion 14b to sink into the through-hole edge 13a of the upper tank 4, thereby increasing the caulking strength (screwing the screw 15 into the threaded part 14d with strong torque). Even if the bottom bracket 14 does not rotate.

) is improving. Reference numeral 15 denotes a stepped portion 15 that fits into a slotted hole 8a provided in a position corresponding to the through hole 13 of the flange 8.
The tip of the screw is screwed into the screw 14C of the bottom fitting 14, and when the stepped lower surface 15b abuts the caulked portion 14d, the backing 9 is removed by the flange 8 and the upper tank 4. This is the end of the tightening process.

Now, regarding the role of the step 15b of the screw 15, as shown in FIG. 2, when the backing 9 is interposed and the screw 15' is tightened, the screw 15' As the shrinkage of the backing 9 increases, the area around the through hole 13 of the upper tank 4 swells.

The disadvantage of such a case is that as the diameter of the through hole 13 increases due to the swelling, the fit with the bottom fitting 14 becomes looser, the tightening strength decreases, and eventually the bottom fitting 14 starts to rotate. This configuration has fatal consequences.

Therefore, in this embodiment, the tightening of the screw 15 is controlled by bringing the stepped lower surface 15b into contact with the caulking portion 14d when the screw 9 is compressed to maintain liquid tightness, thereby controlling the tightening of the screw 15 as described above. This prevents excessive swelling and a decrease in caulking strength.

As described above, in this embodiment, the bottom fitting 14 is caulked and fixed to the through hole 13 of the upper tank 4, so that it can be fixed after painting the tank, etc., as in the case of conventional spot welding of the screw head. Processing is no longer necessary and costs can be reduced.

Furthermore, even if the caulked portion 14d of the bottom fitting 14 does not come into liquid-tight contact with the edge of the through hole 13 as it is, the backing 9 is compressed by tightening the screw 15 as described above, so that Elasticity occurs all around the flange 8,
Due to this elasticity, the upper surface edge 14a of the bottom fitting 14 is
Since the tank is pressed against the edge 13a of the tank 3, the sealing effect of this part is enhanced, and there is no possibility of vaporized gas leaking or oil leaking when the tank is tipped over.

Furthermore, since the burr elasticity of the backing 9 seals the space between the upper surface edge 14a and the edge of the through hole 13, a tank of constant quality without oil leakage can be obtained.

Furthermore, since no welding is performed, the material is not damaged, so there is no need to worry about deterioration over time (material deterioration due to welding heat and corrosion).

As is clear from the above explanation, according to the present invention, it is possible to reliably seal the attachment part of the wick outer cylinder to the fuel tank with a simple structure, and when replacing the wick or cleaning the tank, it is possible to The core outer cylinder can be easily removed using a chisel.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main parts of a liquid fuel combustion device according to an embodiment of the present invention, Fig. 2 is a cross-sectional view used to explain the device, and Fig. 3 is a longitudinal cross-section of a conventional fuel tank. 4 is an enlarged sectional view of section A in FIG. 3. 2...Lower tank, 4...Upper tank, 5
... Core outer cylinder, 8 ... Flange, 9 ...
... Backing, 13... Opening, 14...
...Bottom fitting, 14 b...Protrusion, 14
d... Clamping part, 15... Screw, 15
a...Stepped part.

Claims (2)

[Scope of utility model registration request] (1) A fuel tank having an opening at the top, a core outer cylinder having a flange at the lower end that is attached to cover the periphery of the opening of the fuel tank, and a core outer cylinder having a flange attached to cover the periphery of the opening of the fuel tank, and a backing interposed between the fuel tank and the flange, and a plurality of through holes are provided at positions outward from the backing mounting portion at the periphery of the opening of the fuel tank, and the upper surface edge of the bottom fitting is provided at the edge of the through hole. A liquid fuel combustion device in which a stepped portion of a stepped screw passing through a flange of the core outer cylinder is brought into contact with the upper surface portion of the folded portion. (2) The liquid fuel combustion device according to claim 1, wherein a plurality of protrusions are provided in a portion of the bottom fitting that corresponds to the peripheral edge of the lower surface of the through hole provided in the fuel tank.