JPS6034328A - Oil tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an oil tank such as a cartridge tank used in a water heater.

Conventional structure and its problems In general, the cartridge tank of an oil stove is
As shown in the figure, the peripheral edges of the tank blank plate 1 and the tank blank plate 2 are seamed and integrated, and the handle fitting 3 is joined to the tank blank plate 1 by welding or the like, and is pivoted to the handle fitting 3. It can be lowered by hand via a handle 4. Further, an oil gauge 6 is attached to the tank blank plate 1, which informs when the kerosene stove is running out and indicates when the kerosene is full when refueling.

Furthermore, an oil filling port 6 is attached to the tank blank plate 1, which functions as a lid and allows kerosene to be supplied into the oil stove from a bottle in the oil stove.

FIG. 2 is a sectional view showing the seamed part between the tank blank plate 1 and the tank blank plate 2. The seamed part between the tank blank plate 1 and the tank blank plate 2 has a sealant 8 inside, and this seal The sealing agent 8 is used for sealing. This sealant 8 is applied to either the tank base plate 1 or the tank base plate 2 in advance,
After being temporarily dried, the tank blank plates 1 and 2 are assembled, and after the seaming process, the area around the seaming part 7 is reheated to melt and solidify.

FIG. 3 shows a cross section of the steel plates constituting the tank blank plates 1 and 2. The tank blank plates 1 and 2 are coated with a metal coating 1o on the steel plate 9 which has the property of being easy to pressure form and protect the steel plate 9 from corrosion.
It is made up of a coating.

However, it was discovered that there were several layers of cracks 12 in the metal coating 10, as shown in FIG. Ru. FIG. 5 is a scanning electron micrograph of the surface of the corner portion 11, and it can be seen that cracks 12 have occurred in many layers. This crack 12 also occurs in the seaming portion ξ during the seaming process. Even if this crack 1217J is reheated and melted, it cannot be filled, and as a result, the seamed portion may not be completely sealed. In other words, as shown in Fig. 2, the sealing agent is filled with carbon inside the seamed part, so when heating at Fj, if the high temperature (15° to 250''C) is maintained for a long time (more than 3 minutes),
The air inside expands, and the sealant 8 comes out of the seamed part 7, spoiling the appearance. Therefore, methods such as high frequency heating (・Heating is performed for a short period of time, but even if the viscosity of the sealant 8 becomes low, it will take only a short time.)
−r[+, 1 does not penetrate into the inside of fissure 12, therefore,
If you put kerosene in it, there was a problem that the kerosene would seep out.

OBJECT OF THE INVENTION The present invention was made in view of the problem described in item 11- above, and its purpose is to prevent kerosene from seeping out due to rfj cracks in the metal coating.

Structure of the Invention In order to achieve the object of the present invention 1-11-, an average molecular weight of 1, OOO
~500,000 organic coating is applied, which completely fills the cracks that occur on the surface of the treated steel sheet and eliminates kerosene seepage.

Description of examples An example of this will be described below with reference to FIGS. 6 and 7.

FIG. 6 shows the tank blank 1 before the cartridge tank seaming process, in which an organic coating 14 is applied to the edge 13 which will become the seam part around the corner part 11. This organic coating 14 is made of, for example, an acrylic resin with an average molecular weight of 20.00.
It is made of something like 0 dissolved in a solvent such as toluene or isopropyl alcohol, and is applied by spraying. FIG. 7 shows a cross section of this edge 13, showing a state in which an organic coating 14 is applied over a crack that has occurred in the metal coating 1o and the crack is filled with the organic coating 14, and the seaming process is performed after that. In this way, a cartridge tank as shown in FIG. 2 is manufactured.

Here, during the -F seaming process, cracks similar to those described in the conventional example occur again in the metal coating 10, but the organic θυ coating 14 flows into these cracks and fills them.

Therefore, the defect rate due to kerosene seepage due to cracks is drastically reduced. By the way, when acrylic resin is used for the organic coating 14, the kerosene seepage defect rate (%9) was found as a result of an experiment.
As shown in the histogram shown in the figure, it no longer occurs at all except in areas where the average molecular weight is low and where the average molecular weight is high. The reason is not certain, but it seems to be as follows. In other words, if the average molecular weight of the organic coating material is large, it will shrink when the solvent during coating evaporates, and the organic coating itself may crack, or it may not be able to follow the deformation during the seaming process, causing the metal to shrink. Coating 1
This seems to be because the organic coating material cannot penetrate into the cracks of the metal coating 1o, and if the average molecular weight of the organic coating material is small, it will easily follow the deformation of the seaming process and completely fill the cracks in the metal coating 1o, but the organic coating material itself This seems to be because the organic coating material is in a state where it is easily dissolved in kerosene, so after a while the amount of organic coating agent dissolved in kerosene increases and eventually cracks appear. According to experimental results, the average molecular weight of the organic coating agent is 1.0.
00 to 500,000 is preferred.

Conventionally, there are treated steel sheets on the market with an organic coating on them, but the average molecular weight of the organic coating is 1000.000 or more, and harsh processing or the above-mentioned Cracks also occur when the coated metal cracks during pressure forming and seaming. In other words, conventional organic coatings are hard and have a high average molecular weight in order to prevent them from being scratched during the normal distribution process, so they cannot achieve the effects of the present invention. .

In the above embodiment, the treated steel sheet serving as the tank blank was a steel plate with a metal coating, but the metal coating 10 was made of zinc, an alloy of zinc and aluminum, lead, an alloy of lead and tin, aluminum,
A material containing at least one of -F such as zinc and nickel as a main component is effective. Furthermore, the treated steel sheet is coated with acrylic resin as part of the metal coating.

Vinyl chloride resin, epoxy resin, melamine resin.

It may be made of at least one organic coating such as polyester resin, etc., and such a material may be resistant to corrosion due to human fingerprint marks on the surface of the cartridge tank, or in high temperature and humid conditions. This has the effect of preventing corrosion of the coated metal 10. In addition, this treated steel sheet has metal coating 1o, 1-,
Phosphate treatment, chromate treatment, water glass treatment, colloidal silica treatment, alumina sol treatment, and the above-mentioned organic coating treatments are also effective. The strength against Kozuno 1 is increased, and by combining such treatments, corrosion resistance is increased.

1) It is possible to increase the adhesion of the organic wave coating.

And by doing this, there is no need for full-scale painting after the completion of the Torisoji tank.

Further, in this embodiment, organic wave & was applied to the treated steel sheet after being pressure-formed into a predetermined shape, but the same effect can be obtained by applying 4 times of coating before pressure-forming.

Effects of the Invention As described above, the present invention provides a cartridge tank configured by seaming the edges, with an average molecular weight of 1 at least in the seaming part.
,000 to 600,000, it is safe because the kerosene injected into the cartridge does not seep out to the outside, and it is economical because it eliminates the need to paint the entire surface of the cartridge tank. Cartridge tanks can be supplied.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional cartridge tank, Fig. 2 is an enlarged sectional view of the tightening part of the tank, Fig. 3 is a sectional view of a treated steel plate used in the cartridge tank, and Fig. 4 is a diagram of the tank. A sectional view of the corner part, FIG. 5 is a diagram showing the same surface condition,
Fig. 6 is a perspective view of the main parts of a tank in an embodiment of the present invention, Fig. 7 is a cross-sectional view of the edge of the tank, and Fig. 8 shows the defect rate of kerosene seepage with respect to the average molecular weight of the organic coating. It is a histogram. 1... Tank blank plate, 2... Tank blank plate, 10...
・Metal coating, 14...Organic coating. Name of agent: Patent attorney Toshio Nakao and 1 other person @
1 Figure 2 Figure 3 Figure 5 Figure 6! SIO”-Kenshi Genwa Ore Zheng Homare?

Claims (1)

[Scope of Claims] (1) It is constructed by seaming the edges of a pair of tank blanks, and at least one of the tank blanks is a treated steel plate that is pressure-formed into a predetermined shape and coated with metal. Consisting of
An oil tank in which an organic film having an average molecular weight of 1,000 to 500,000 is formed on at least the winding frame of a tank blank made of the treated steel plate. (2) The metal coating described in -J- is mainly composed of at least one or more resins such as the resin of Claim 1 whose main component is at least one of zinc or aluminum, epoxy resin, or melamine resin. An oil tank according to claim 1. (4) The above-mentioned pressure-formed treated steel sheet has been subjected to at least one type of treatment such as phosphate treatment, chromate treatment, organic coating treatment, water glass treatment, colloidal silica treatment, alumina sol, etc. on the surface of the metal coating. The oil tank according to claim 1, which is made of a treated steel plate.