JPS6239450A - Closed type drum can made of stainless - 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 "Industrial Application Field" The present invention is directed to preventing the infiltration of stored chemicals at the winding bonding portion between the body plate and the main plate, and the winding bonding portion between the body plate and the main plate of a stainless steel closed type drum can. When we cut off the flow between the gap and the inside of the drum cavity, and when cleaning it for reuse, we make sure that other chemicals from the previous use do not get mixed in, and weld and heat the surface of the welded part on the inner surface of the drum cavity. l of the chemical liquid, etc. for melting and infiltration of the chemical liquid, etc. to be contained in the burnt contamination based on
In order to eliminate the risk of deterioration and to provide further durability, a passivation layer is provided on the entire surface of the inner cavity of the drum. This relates to a rose-type stainless steel drum can that is safe and has no danger of AtM.

``Conventional technology'' Traditionally, these seed drum cans were mainly made of iron, and because of their low cost, they were often cut into single pieces and thrown away. Damage such as water leakage and loss was not a big problem, but recently there has been an increase in the number of cases in which high-grade chemicals are stored, and the use of expensive stainless steel drums has increased, and because they are expensive and durable, Even after a chemical solution has been stored and used, the drum can has to be used again and again to store other chemical solutions, and as a result, the previously stored chemical solution may remain and mix with the next stored chemical solution. However, in this type of stainless steel closed type drum can, the top plate and body plate, the base plate and body plate, etc. are glued together. In this case, as shown in Figure 3, the winding and gluing are performed, and in this case, for the winding and gluing, the top plate, the curved part of the base plate, and the inner surface of the body plate are attached to the drum cavity side of the bonded part. There are annular recessed grooves a and a' between them, and gaps tend to continue intermittently due to the winding adhesive, and there are generally only a few gaps at the winding ends of the top plate, base plate, body plate, etc. If there is a gap at the end, b' tends to occur continuously, so the gap 3. a
When ', b, b' are used repeatedly, even after careful cleaning, a slight amount of the previous chemical solution tends to remain, especially through the slits and the end gap.

The previously stored chemicals and the like that have entered b' cannot be completely washed away, but they penetrate deeply and remain. Therefore, when the liquid remaining from the previous time is reused, it oozes into the newly stored chemical solution of a different type, causes a chemical change in the new stored liquid, and causes dirt, especially when used in fragrance-related storage. In the case of liquids, the contamination caused by contamination by residual liquids is so serious that it is difficult to carry out the treatment.Also, when storing chemicals with severe medicinal effects, stainless steel and raccoon dogs should be used. However, it is not necessarily durable, and there is a demand for further cleanliness and increased chemical resistance on the inside of the drum can.

"Problems to be Solved by the Invention" Chemicals previously stored in the winding adhesive areas of the top plate and body plate, and the bottom plate and body plate are cleaned and removed to eliminate the presence of any deep recesses or gaps, and the drum It is intended to provide a highly durable layer on the inner surface of the IIPI cavity.

"Means for solving the problem" A filling welded part is present in the annular recessed gap around the inner surface of the winding adhesive part between the top plate and the body plate, and a downward direction approximately perpendicular to the outer periphery of the base plate is provided. There is a curved part, and there is a seam welded part on the upper part of the winding adhesive part between the base plate and the body plate, and there is also a seam welded part at the top plate and the body plate, and each of the seam welded parts of the base plate and the body plate. A harsh acidic chemical is sprayed onto the welded area to remove burnt stains, and the harsh acidic chemical is sprayed over the entire inner cavity of the drum to form a passivation layer.

"Embodiments and Effects" To explain in detail with reference to the attached drawings showing an example of the implementation of the present invention, 1 is a body plate of a closed type stainless steel drum can; 2
are the same top plate, and both 1 and 2 are bonded by the winding adhesive portion 10. a is an annular concave gap that inevitably occurs when both 1 and 2 are wound and bonded. Reference numeral 14 indicates a filling welded portion provided to eliminate the annular recessed gap. In this case, there is inevitably a gap extending deep between the two plates 1 and 2 of the winding bonded portion, but due to the filling and welding portion 14, the gap is The inside of the body cavity 4 is completely free from circulation, and even if the first chemical agent etc. is housed in the body cavity,
It cannot enter into the gap in this part, and when it is cleaned, there is no fear that it will remain in the winding welded part, and it can be easily cleaned and removed. 3 is used as a base material and the body plate 1 is wound and glued 11. In this case, in the present invention, the outer periphery of the base plate 3 is not curved in an arc shape, but is curved downward at a right angle 5, and the seam welding 16 is applied from the outer surface to the bonded portion 1.3 of both, and the core portion Since the base plate is curved at a right angle, there is no annular groove in the groove, and the chemical solution stored in the front can be easily removed by cleaning and not left behind. Since the gap b' and the inside of the body cavity 4 are disconnected by the seam weld 16, there is no way for the previously stored chemical solution to enter the gap b', so there is no need to clean the core. be. In the present invention, as described above, there are heat-welded parts 14 and 16 at the winding bonded parts of the top plate 2 and the body plate 1, and the bottom plate 3 and the body plate 1, so that the burnt and stained parts due to heating are 17, and this staining 14゜16 has the disadvantage that when storing harsh chemical solutions, etc., it dissolves and contaminates the stored solution, especially when storing fragrances, etc. In this case, the drawbacks are particularly noticeable.

In addition, in the case of an open drum can, even if such contamination may occur, it will result in enormous labor and danger each time the core is manually coated with a caustic acid solution and polished. However, such manual polishing is not possible in a closed-type drum can like the product of the present invention, so it is difficult to remove it. By inverting the entire drum can so that the inlet/outlet 15 faces downward, inserting a nozzle through the inlet/outlet 15, and rotating it while powerfully spraying the octopus acid solution, etc., the burning and waste 17 can be reduced. It can be easily removed, and there is no risk of contamination by the next stored liquid as described above. Furthermore, in the present invention, by applying the spray from this nozzle to the entire inner surface of the drum can, the stainless steel surface undergoes a chemical change, and the entire inner surface of the drum can is coated with a passive lower layer 18, which prevents harsh chemical liquids. Because of the chemical-resistant layer, it can withstand even when liquids such as harsh chemicals are contained therein.

"Effects" As described above, the present invention provides the winding adhesive portion 10 between the top plate 2 and the body plate 1.
Also, in the winding adhesive part 11 between the main plate 3 and the body plate 1, there are gaps a, b, a' through which the contained chemicals etc. can deeply penetrate.
, b', etc., and can be easily removed by cleaning without worrying that chemicals, etc. that are normally stored in Furukawa will remain after cleaning, and there is no risk of contamination with new chemicals, etc. when used, causing deterioration. Furthermore, even if there is a heated welded part to eliminate the gap, the scorched part caused by this can be easily removed even in a closed type tram can, and it can be used to store harsh chemicals etc. Even if the drum is hit, it can be used with peace of mind without worrying that the burnt material will change the quality of the molten contaminants.Also, since there is a passivation layer on the entire inner surface of the drum, it will not be damaged even if it contains harsh chemicals, etc. As a stainless steel closed type drum can, it has outstanding effects from every point of view, such as its high durability and durability.

[Brief explanation of drawings]

The attached drawings show an example of the implementation of the present invention. Fig. 1 is a perspective view of a stainless steel closed type drum can of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a conventional product. FIG. 1- body plate, 2- top plate, 3- base plate, 4- body cavity, 5- right angle downward curved part, l〇- winding adhesive part of top plate and body plate, 11-.
Winding adhesive part between base plate and body plate, 14-Filling welding part, 15-Entrance/exit, 16-Seam welding part, 17-Burning stain part, 18
- passivation layer, a, a' - annular interportal gap, b, b' - deep gap.

Claims (1)

[Claims] There is a filling welded part in the recessed gap around the inner surface of the winding adhesive part between the top plate and the body plate, there is a substantially right-angled downward bent part on the outer periphery of the base plate, and the base plate and the body plate There is a seam welded part on the upper part of the winding adhesive part between the top plate and the body plate, and there is no scorch stain inside each of the welded parts of the winding adhesive part between the top plate and the body plate, and between the base plate and the body plate, and A stainless steel closed type drum can characterized by having a passivation layer on the entire inside of the drum can.