KR101055814B1 - Radiator coating method for transformer - Google Patents

Abstract

Radiator coating method for transformer of the present invention is to remove the rust preventive oil or oxide of the radiator, the pre-treatment step of shorting the surface with a short grit, the main coating step for painting and drying the radiator, and the painting and dried painting state inspection It includes a test step.

Transformer, Radiator, Painting, Shorting, Impregnation, Pretreatment, Heat Dissipation, Cooling

Description

Radiator Coating Method for Transformers {PAINTING METHODE OF TRANSFORMER'S RADIATOR}

1 is a flow chart showing a radiator coating method for a transformer according to an embodiment of the present invention.

Figure 2 is a flow chart showing in detail the pre-processing step of FIG.

3 is a flow chart showing in detail the present painting step of FIG.

The present invention relates to a radiator coating method for a transformer, and more particularly, to extend the paint life of the radiator for a transformer tank installed in the transformer to cool or radiate heat, and to reduce the waste and waste water of paint, chemicals, etc. to prevent environmental pollution The present invention relates to a radiator coating method for transformers.

In general, a transformer converts a primary voltage applied to a primary into a required secondary voltage and is supplied at a high voltage so that power transmitted from a power plant or transmission station can be transmitted at a long distance. It is a device that lowers or raises to the required voltage.

Such transformers are installed in necessary places and equipments, and especially radiators are installed in the tanks of the low and high voltage transformers to cool or radiate heat. The radiator is used to paint the surface to ensure long life.

After the radiator coating method removes all the oxide formed on the surface of the steel plate of the radiator, the rust preventive oil applied to suppress the generation of oxide, etc., and then forms an rust-proof zinc phosphate coating

The undercoat, middle coat and top coat were coated on the film by airless spray in a closed space without ventilation.

However, since the wastewater is generated by acid treatment chemicals to remove oxides or rust preventive oils in the removing step, wastewater treatment is expensive, and there is a problem of polluting water quality, soil, and air by wastewater.

In addition, the coating formed on the film is sprayed around the air than the amount sprayed on the radiator to be coated by airless spray method, which causes about 60% of waste, and is not particularly included in the spray area. If the paint is poor, there is a problem that is easily oxidized when installed on the beach with a lot of salt.

The present invention was created in view of the above necessity, for reducing the discharge of waste water, such as chemicals according to the conventional removal of foreign substances and coating film for reducing the cost of waste water treatment, for transformers to prevent environmental pollution due to waste water The purpose is to provide a radiator coating method.

In addition, it is an object of the present invention to provide a radiator coating method for a transformer that can be maintained continuously by reducing the area not to be painted while reducing unnecessary paint waste in the painting step.

The radiator coating method for transformers of the present invention for achieving the above object is a pretreatment step of removing the rust preventive oil or oxide of the radiator, and a short grit on the surface, and the main coating step of painting and drying the radiator, and the painting And an inspection step of inspecting the dried painting state.

Here, the main coating step includes a sub-impregnation coating step of impregnating and coating the pretreated surface, a medium-impregnation coating step of re-impregnating and coating the sub-impregnated surface, and a heating and drying step of heating and drying the impregnated surface. And, it is preferable to include a middle spray coating step of spray coating on the heat-dried surface, a top spray coating step of re-spray coating, and a forced drying step of forced drying in the state that the painting is completed.

And the heat drying step is preferably dried by heating for 30 minutes at a temperature of 130 degrees Celsius.

In addition, after the heat drying step, it is preferable to include a concave-convex forming step of working with the send paper so that the concave-convex may be formed on the surface.

Preferably, the short grit is 0.5 mm or less in diameter.

And after the pretreatment step, a cleaning step for removing the short grit and the foreign matter.

In addition, the cleaning step is preferred to clean by spraying air.

In addition, the pre-treatment step is an automatic shorting step for shorting by automatically spraying the shot grit, a manual shorting step for manually shorting the unshorted area according to the state of the automatic shorting, and foreign matter on the surface in the state of the automatic and manual shorting is completed It is preferable to include a cleaning step to remove the.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, the defined terms are defined in consideration of the function of the present invention, and should not be understood in a limiting sense of the technical elements of the present invention.

1 is a flow chart showing a coating method of a radiator for a transformer according to an embodiment of the present invention. FIG. 2 is a flowchart showing the pretreatment step of FIG. 1 in detail, and FIG. 3 is a flowchart showing the present painting step of FIG. 1 in detail.

Referring to Figure 1, the radiator coating method for the transformer of the present invention is to remove the rust preventive oil or oxide of the radiator, the pretreatment step (S100) and the short grit (Short Grit) on the surface, the radiator is coated and dried To be painted through the painting step (S200), and the inspection step (S300) for inspecting the coating and dried coating state.

Here, the pre-treatment step (S100) includes an automatic shorting step (S110) for shorting by automatically spraying the shot grit, and a manual shorting step (S120) for shorting manually, and removes foreign substances on the surface in a state where automatic and manual shorting is completed. The cleaning step S130 is included.

The automatic shorting step (S110) is to spray the shot grit using an automatic shorting device, to separate the oxide formed on the surface of the radiator, and the rust preventive oil applied for the purpose of suppressing the generation of the oxide from the radiator, or to polish the surface The short grit used for shorting, which is used for shorting, is provided to have a diameter of 0.7 mm or less. The preferred size of the shot grit here is 5 mm or less.

The manual shorting step S120 performs the same function as the automatic shorting step S110. When the shorting is completed in the automatic shorting step S110 or when the shorting is incomplete or a shorting area occurs during the shorting process, the shorting is performed manually. It is. Therefore, the manual shorting step S120 may be performed after the automatic shorting step S110 or may be shorted in parallel with the automatic shorting step 110.

Here, the manual shorting step S120 is a manual shorting of the unshorted part in the automatic shorting step S110. If the shorting is performed uniformly over the entire surface in the automatic shorting step S110, the manual shorting step S120 may be deleted. Can be.

Then, when the shorting is completed, a cleaning step (S130) of spraying and removing only the short grit used for the shorting and the rust preventive oil and the oxide separated by the automatic shorting or the manual shorting by air only.

Here, the shorting condition is continuously observed, and if it does not form the desired surface, it is shorted again.

Thereafter, the present painting step (S200) is performed, the present painting step (S200) is performed by the method of impregnating coating to reduce unnecessary waste of paint.

Here, the painting step (S200) is coated in the steps of the lower, middle, and upper coating, specifically, the lower coating coating step (S210), the middle coating step (S220), the heating drying step (S230), and the unevenness are formed. The coating is performed including a step S235, a middle spray painting step S240, a top spray painting step S250, and a forced drying step S260.

First, the undercoat impregnating coating step (S210) is to perform the impregnation coating under the radiator in the state in which the pretreatment is completed after the shorting and cleaning is completed. The paint applied to the impregnated coating is a water-soluble alkyd modified melamine paint made of an uncured resin at room temperature.

At this time, when the undercoat coating is completed, it is placed in a separate stagnation stand to remove the paint drops formed at the bottom. Then, the radiator is rotated 180 degrees using a rotating jig so that the upper and lower sides can be switched.

Since the radiator is rotated to perform the intermediate impregnation coating step (S220). Here, the intermediate impregnation coating step (S220) performs re-impregnation coating on the surface of the radiator coated in the under-impregnation step (S210) and the paint applied to the impregnation coating is the same as in the under-impregnation step (S210).

At this time, when the intermediate impregnation coating is completed, it is placed upside down in a separate stand for stagnation and then removes the paint drops formed on the bottom of the radiator in the inverted state. Then, the radiator is rotated 180 degrees using the rotating jig so that the upper part and the lower part are returned to their original state.

Then, the heating and drying step (S230) is performed. Here, the heat drying step (S230) accommodates a radiator coated with copper-impregnated in a drying furnace to be cooled by heating. At this time, the drying furnace is heated to a temperature of about 130 degrees Celsius, and dried by heating about 30 minutes.

Thereafter, when the heating and drying is completed, the irregularities forming step (S235) is performed. Here, the unevenness forming step (S235) forms a fine unevenness on the surface for the next coating process to be formed by using sand paper, etc., so that the surface can be finely roughened.

Thereafter, the middle spray coating step (S240) is performed. Here, the intermediate spray coating step (S240) is to paint the surface of the radiator impregnated in the intermediate impregnated coating step (S230) by the air drying spray method on the surface subjected to the heat drying step (S230) and the unevenness forming step (S235).

At this time, the intermediate spray painting step (S240) is to adjust the thickness of the coating layer formed on the surface of the radiator, spray coating the both sides of the radiator. It is inserted into a drying furnace and forced to dry for 30 minutes at a temperature of 130 degrees Celsius.

Then, after the top-coating spray coating step (S250) to perform a double-sided coating and inserted into the drying furnace for forced drying at a temperature of 130 degrees Celsius for 30 minutes.

Thereafter, after the inspection step (S300) for checking the state of the completed radiator is shipped.

Although the technical idea of the radiator coating method for a transformer of the present invention has been described with reference to the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention.

Therefore, it is obvious that any person skilled in the art can make various modifications and imitations such as dimensions, shapes, structures, etc. without departing from the scope of the technical idea of the present invention.

As described above, it is possible to reduce the treatment cost of waste water and to prevent environmental pollution by not using the conventional chemicals according to the removal of foreign substances and the film formation.

In addition, by coating in a method of impregnation rather than spraying in the coating step, the waste of unnecessary paint is reduced, and all the impregnated parts are not easily removed because they are painted, thereby preventing corrosion.

Claims (8)

A pretreatment step of shorting the radiator surface with a shot grit to remove rust preventive oil or oxide from the radiator surface; A cleaning step of removing the short grit and the foreign matter by air injection after the pretreatment step; A main coating step of painting and heating and drying the radiator from which the shot grit and the foreign matter have been removed from the cleaning step; And, the inspection step of inspecting the state of the coating and heat-dried coating; Including, After the heating and drying in the present painting step, the concave-convex forming step of working with the send paper to form the concave-convex on the surface; Radiator coating method for a transformer, characterized in that it further comprises. The method of claim 1, The main coating step is the undercoat impregnating coating step of impregnating the pre-treated surface; A medium impregnating coating step of reimpregnating and coating the sub-impregnated surface; A heat drying step of heating and drying the impregnated painted surface; A middle spray coating step of spray coating the heat dried surface; Top spray coating step of re-spray coating; And, Radiator coating method for a transformer, characterized in that it comprises a forced drying step for forced drying in the state that the painting is completed. The method of claim 2, The heating and drying step is a radiator coating method for a transformer, characterized in that for 30 minutes by heating to a temperature of 130 degrees Celsius. delete The method of claim 1, The short grit is a radiator coating method for a transformer, characterized in that the diameter of 0.5mm or less. delete delete delete

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