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KR-102963460-B1 - The waterproofing method for stainless steel hot water tank

KR102963460B1KR 102963460 B1KR102963460 B1KR 102963460B1KR-102963460-B1

Abstract

The present invention relates to a waterproofing method for stainless steel hot water tanks. It was developed to extend the service life of a stainless steel hot water tank by applying a special adhesive and reinforcing coating to the interior in cases where durability rapidly declines or leakage occurs or is a concern due to aging or various causes during use; the method comprises: a cleaning process in which a worker enters the interior of the stainless steel hot water tank and cleans the interior by spraying water at high pressure while discharging foreign substances and water using a vacuum suction device; a sanding process in which foreign substances are removed by sanding the surface of vulnerable areas where oxidation has occurred or cracks have formed or are showing signs of forming, while performing a supply and exhaust of external air and internal air; a sanding process in which foreign substances are removed and the surface is roughened to increase adhesion efficiency; a special adhesive reinforcement process in which a metal adhesive is applied to the vulnerable areas after the sanding process to form an adhesive reinforcement layer; and a waterproofing reinforcement process in which a waterproofing compound manufactured based on epoxy resin is mixed with silica sand, spread on the vulnerable areas, and dried by supplying cold air for more than 3 hours to form a reinforcing waterproofing layer with a thickness of 1 mm. The present invention relates to a waterproofing method for a stainless steel hot water tank, characterized by a series of coating processes that form a waterproof layer by continuously performing a process of mixing a waterproofing agent manufactured based on epoxy resin with silica sand, performing a coating operation on the inside of the hot water tank, and then repeating the process of drying by supplying cold air for more than 3 hours at least 3 times.

Inventors

  • 박병후

Dates

Publication Date
20260513
Application Date
20240822

Claims (10)

  1. A cleaning process (100) in which a worker enters the interior of a hot water tank (1) made of stainless steel and sprays water at high pressure to clean the interior while discharging foreign matter and water with a vacuum cleaner; A sanding process (200) for removing foreign substances by sanding the surface of a vulnerable area where oxidation occurs or cracks occur or signs of occurrence are visible, while allowing for the supply and exhaust of external air and internal air to be introduced and discharged, and for roughening the surface to increase adhesion efficiency; A special bond reinforcement process (300) for forming an adhesive reinforcement layer (11) by applying a metal adhesive to a weak area after sanding; A waterproof reinforcement process (400) for forming a reinforced waterproof layer (12) with a thickness of 1 mm by mixing a waterproof compound manufactured based on epoxy resin with silica sand, spreading it over a vulnerable area, and drying it by supplying cold air for more than 3 hours; A series of processes of a coating process (500) for forming a waterproof layer (13) is continuously performed by mixing a waterproof compound manufactured based on epoxy resin with silica sand, performing a coating work on the inside of a hot water tank (1), and then repeating the process of drying by supplying cold air for more than 3 hours at least 3 times. Before performing the above special bond reinforcement process (300), a reinforcement plate (15) is prepared in which a first fixing hole (151) is formed on both sides spaced apart perpendicular to the direction of the crack in the weak area where the crack has occurred, and a second fixing hole (152) corresponding to the first fixing hole (151) is formed at both ends; The above special bond reinforcement process (300) is configured to first apply a metal adhesive including the portion where the first fixing hole (151) is formed, position the reinforcement plate (15) so that the first fixing hole (151) and the second fixing hole (152) align before the applied metal adhesive hardens, pass a hollow expansion screw (154) combined with a bolt (153) through the first and second fixing holes (151, 152), pull the head of the bolt (153) so that one end of the hollow expansion screw (154) folds and expands, and tighten the bolt (153) to fix the reinforcement plate (15), and then apply the metal adhesive a second time over the above. A stainless steel hot water tank waterproofing method characterized in that the reinforcing plate (15) has a curved portion (155) that is bent inwardly convexly with respect to the inner wall surface of the hot water tank (1) and extends in the longitudinal direction, and straight portions (156) that are in close contact with the inner wall surface of the hot water tank (1) on both sides of the curved portion (155).
  2. In paragraph 1, A stainless steel hot water tank waterproofing method characterized by adding 100cc of No. 6 silica sand with a thickness of 0.35 to 0.7mm to 1kg of waterproofing agent and stirring to mix the material when the cracked area in the above waterproofing reinforcement process (400) is 1mm or less.
  3. In paragraph 1, A stainless steel hot water tank waterproofing method characterized by adding 200cc of silica sand No. 6 with a thickness of 0.35 to 0.7mm to 1kg of waterproofing agent and stirring to mix the cracked area in the above waterproofing reinforcement process (400).
  4. In paragraph 1, A stainless steel hot water tank waterproofing method characterized by adding 100cc of silica sand No. 5 with a thickness of 0.7 to 1.2mm to 1kg of waterproofing agent and stirring to mix the material when the cracked area in the above waterproofing reinforcement process (400) is 2mm or more.
  5. In paragraph 4, A stainless steel hot water tank waterproofing method characterized by being configured such that glass fibers (14) are attached to the vulnerable area in the above waterproofing reinforcement process (400), and then the above waterproofing reinforcement process (400) is performed so that the glass fibers (14) are buried.
  6. In paragraph 1, A stainless steel hot water tank waterproofing method characterized by performing a process of heating the interior to 15~20℃ using a hot air blower when the internal temperature of the hot water tank (10) is 4℃ or lower after performing the above sanding process (200).
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  9. In paragraph 1, A stainless steel hot water tank waterproofing method characterized by forming a straight or curved portion on the inner surface of the hot water tank (1), and the reinforcing plate (15) being bent to adhere to the inner surface of the hot water tank (1), and additionally providing a reinforcing rib (157) that protrudes in the longitudinal direction from the center of the curved portion (155) of the reinforcing plate (15).
  10. In paragraph 1, When the inner surface of the hot water tank (1) is formed in a straight or curved portion, the reinforcing plate (15) has a pressure protrusion (159) that protrudes from the bent portion; A stainless steel hot water tank waterproofing method characterized by additionally mounting an elastic piece (158) that is inserted between the reinforcing plate (15) and the hot water tank (1), and is fixed by having both sides penetrated by the hollow expansion screw (154) and bolt (153), and is pressed by the pressure protrusion (159) to have elastic restoring force.

Description

Waterproofing method for stainless steel hot water tank The present invention relates to a waterproofing method for stainless steel hot water tanks. More specifically, it relates to a waterproofing method for stainless steel hot water tanks developed to extend the service life of a tank by applying a special adhesive and reinforcing coating to the interior in the event of leakage or a concern arising from hair cracks or pitting corrosion caused by aging or various other factors during use. The hot water tank stores hot water, heated internally or by a separate heating device, while minimizing heat loss for later use. Compared to real-time hot water heating systems, it can handle a large capacity instantaneously and is designed to generate hot water at a low cost during times of low electricity consumption or when electricity rates are discounted. These hot water tanks are used in offices, factories, research institutes, commercial buildings, lodging establishments, and military bathhouses; most were primarily made of stainless steel to ensure durability, preventing oxidation—that is, rust—so that clean hot water could be used for a long time. However, even stainless steel naturally oxidizes on the inner and outer surfaces of the hot water tank due to the aging of the equipment when used continuously for a long time. Although stainless steel has superior properties compared to ordinary steel, it is relatively vulnerable to heat, making it prone to damage to the body, especially at welded joints. In the worst case, cracks may occur, leading to frequent accidents where the hot water stored inside leaks out. In the case of such damaged hot water tanks, repair or replacement work is required. In the case of repair work, as mentioned above, due to the characteristic of being vulnerable to heat, a precise welding process must be performed after preheating, but this significantly reduces durability. Furthermore, welding at room temperature is difficult or impossible, and there was a problem in that the lifespan extension effect was not significant unless separate reinforcement work was performed on the welded parts and nearby areas where the properties were altered by heat during the process of water pressure acting inside the hot water tank. On the other hand, the replacement work effectively requires replacing the entire hot water tank system, which increases the replacement cost and time. In the case of large-capacity hot water tanks, there was a problem in that the replacement work was particularly difficult and the cost burden was significant. FIG. 1 is a block diagram according to one embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing a waterproofed hot water tank according to one embodiment of the present invention. FIG. 3 is a partial cross-sectional view showing a waterproofed hot water tank according to a first enlarged embodiment of the present invention. FIG. 4 is a conceptual diagram according to a second enlarged embodiment of the present invention. FIG. 5 is a conceptual diagram according to a third enlarged embodiment of the present invention. FIG. 6 is a conceptual diagram according to a fourth enlarged embodiment of the present invention. FIG. 7 is a conceptual diagram according to the fifth enlarged embodiment of the present invention. Accordingly, the configuration of the present invention is described in detail below with reference to the attached drawings so that those skilled in the art can easily understand and reproduce it. FIG. 1 is a block diagram according to an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view showing a waterproofed hot water tank according to an embodiment of the present invention. The invention comprises: a cleaning process (100) in which a worker enters the interior of a hot water tank (1) made of stainless steel and sprays water at high pressure to clean the interior while discharging foreign substances and water with a vacuum suction device; a sanding process (200) in which foreign substances are removed by sanding the surface of a vulnerable area where oxidation occurs or cracks are detected or signs of occurrence are shown, while supplying and exhausting external air and discharging internal air, and the surface is roughened to increase adhesion efficiency; a special bond reinforcement process (300) in which a metal adhesive is applied to the vulnerable area after the sanding process to form an adhesive reinforcement layer (11); and a waterproof reinforcement process (400) in which a waterproof compound manufactured based on epoxy resin is mixed with silica sand, spread it over the vulnerable area, and then dry it by supplying cold air for more than 3 hours to form a reinforced waterproof layer (12) with a thickness of 1 mm. A stainless steel hot water tank waterproofing method is presented, characterized by a series of processes of a coating process (500) in which a waterproofing agent manufactur