FR2551424A1 - RESERVOIR CLOSES, ESPECIALLY AN INTERNAL PROTECTION WATER HEATER, AND METHOD FOR PRODUCING SAID PROTECTION - Google Patents

Abstract

THE INVENTION RELATES, ON THE ONE HAND, TO A CLOSED TANK, IN PARTICULAR TO A WATER HEATER WITH INTERNAL PROTECTION, AGAINST A LIQUID OR GAS FLUID AND, ON THE OTHER HAND, TO A PROCESS ALLOWING THE REALIZATION OF THIS INTERNAL PROTECTION FROM THE RESERVOIR. THIS TANK IS CHARACTERIZED IN THAT IT CONTAINS A PREFERRED STEEL METAL SUPPORT WHOSE INTERNAL SURFACE 9, 10 IS PROVIDED WITH A PROTECTIVE COATING IN ALUMINUM OR ZINC 11, 12 APPLIED BY METALLIZATION THEN SUBJECTED TO A HEAT TREATMENT. THE INVENTION CONCERNS THE MANUFACTURE OF HOME APPLIANCES.

Description

The invention relates, on the one hand, to a closed tank in particular

  of a water heater with internal protection against a liquid or gaseous fluid and, secondly, with a method for producing this internal protection of the tank.

  It is known to provide the internal face of some tanks such as the water heater tanks with an internal protection against aggressive water which are all the same drinking water mainly consisting of enameling, galvanizing, plasticizing or cement protection For this purpose , the tanks of the water heaters must have at their lower part a relatively large opening

  necessary for the treatments indicated above.

  However, in view of the legislation governing compulsory guarantees, this internal protection must be effective in time and real from the point of view of protection. However, it turns out that only a very small area, of the order of one millimeter squared, is not properly enamelled so that, after a certain period of time, the apparatus in question leaks It is certain that this presents serious drawbacks for the manufacturers of such apparatus, in particular because the user can, according to the legislation in force, to call on the guarantee. Indeed, even if the tank has a relatively large opening at its lower part, it is absolutely not certain that the protective layer is uniformly applied over the entire internal surface of the tank. Moreover, it is necessary to provide means for

  seal this cover.

  As a result, the cost of such a reservoir is relatively high then

  that it is absolutely not certain that protection is real and effective.

  The present invention aims to overcome these disadvantages.

  The invention, as characterized in the claims, addresses the problem of creating a method of providing

  the entire internal surface of the tanks for effective, real protection

and of great duration.

  For this purpose, the invention relates to a closed reservoir, in particular a water heater with internal protection against a liquid or gaseous fluid, ca35 characterized in that it comprises a metal support, preferably made of steel, the internal surface of which is provided with a protective coating

  aluminum or zinc applied by metallization and then subjected to a heat treatment.

  The invention also relates to a method for producing t 2 the internal protection of a closed tank including a water heater characterized in that it takes two enantiomorphic half-shells metal, which is prepared the surface internal of these two half-cups to make it suitable for receiving a metallization, that on this surfa5 this prepared is applied by metallization an adequate thickness of aluminum or zinc, then proceeded to the assembly by welding of two half-shells to obtain the reservoir and that, finally, the latter is subjected to a heat treatment at a given temperature

  to improve the anti-corrosive effect of the inner liner.

  The advantages achieved by this invention consist essentially in that the coating of the inner surface of the tank is applied before assembly, which allows easy access to

  This entire internal surface can be checked and the uniformity of the coating checked and the entire inner surface covered with the protective coating.

  The invention will be better understood with reference to the following description given by way of nonlimiting example and to the drawing appended hereto.

which:

  Figure 1 is an elevational view in section of the two half-shells 20 of a tank according to the invention before assembly.

  Referring to the single figure according to the invention, the tank comprises a metal support preferably made of steel and formed of two half-shells 1, 2 whose shape and section are unspecified However, it is desirable that these two half-shells 1 , 2 are enantio25 morphes to allow their assembly by welding to obtain the desired reservoir Without departing from the scope and spirit of the invention, the

  tank may be formed of a container that can be closed by a lid.

  For the water heaters, it is desirable for the tank to be made up of a cylinder closed at each end by a bottom. For this purpose, the invention recommends using two half-shells 1, 2 each of which is

  formed of a ferrule 3, 4 and a bottom 5, 6 These two half-shells 1, 2 will be assembled after application of the protective coating, by welding together the edges 7, 8 of the two ferrules 3, 4.

  According to the invention, an anti-corrosive protective coating 11, 12 is produced on the inner surface 9, 10 of each half-shell 1, 2. For this purpose, the invention proposes a process that can be carried out

  because the two half-shells 1, 2 are independent before the coating 11, 12 and that the latter can be applied from the end or-

green 13, 14 of the ferrules 3, 4.

  For this purpose, the inner surface 9 is prepared so as to render it capable of receiving a metallization. On this prepared surface 9, 10, a metallized layer having an adequate thickness of zinc or other similar products After the application of this metal layer, the two half-shells 1, 2 are welded by applying their edges against each other 7, 8 Then, the obtained reservoir is subjected to a heat treatment at given temperature During this heat treatment, the different molecules of aluminum, zinc or other are bonded to each other. As a result, a homogeneous layer is obtained and the effect is improved.

  anti-corrosion of this inner coating.

  Although the invention has been described with respect to a particular embodiment, it is understood that it is in no way limited thereto and that various modifications of shapes, materials and combinations thereof can be made. these various elements, without departing from the framework and the spirit of the invention.

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Claims (4)

claims   1 closed tank including a water heater with internal protection against a liquid or gaseous fluid, characterized in that it comprises a metal support preferably steel whose inner surface (9, -10) is provided with a coating protector made of aluminum or zinc (11, 12) applied by metallization and then subjected to heat treatment. 2 tank according to claim 1, characterized in that the metal support is formed of two half-shells (1, 2) comprising a   opening end (13, 14) for applying the protective coating (11, 12).   Tank according to Claim 2, characterized in that the   two half-shells (1, 2) comprise a bottom (5, 6) and a ferrule (3, 4) whose edges (7, 8) are welded together after application of the protective coating (11, 12).   4 Process for producing the internal protection of a closed tank, in particular a water heater according to Claim 1, characterized in that two enantiomorphic metal half-shells (1, 2) are taken the inner surface (9, 10) of these two half-shells (1, 2) is prepared to make it suitable for receiving a metallization, and on this prepared surface (9, 10) a thickness is applied by metallization ( 11, 12) of aluminum or zinc, which is then welded together the two half-shells (1, 2) to obtain the tank and that ultimately it is subjected to a heat treatment at a given temperature to improve the anti-corrosive effect of the inner coating (11,12)