JPS58210888A - Method of washing and drying electric apparatus - 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 The present invention relates to a method for cleaning and drying electrical equipment such as motors and generators.

Conventionally, electrical equipment such as electric motors 1Ako Electric uses detergents mainly containing organic solvents to prevent deterioration of insulation resistance or adverse effects on metal materials and insulating materials.
For example, a method is used in which the wire is cleaned by spraying under pressure, and then the anti-adhesive detergent is removed by blowing air on the wire, and the wire is further dried in a hot air drying oven.

However, according to this conventional method.

Organic magents are made of substances such as chlorinated hydrocarbons that are harmful to the human body and highly flammable petroleum naphtha, and are not only problematic but also expensive. In addition, since the solvent that was not removed by compressed air is volatilized in the hot air drying furnace, the furnace is filled with solvent gas and when the door is opened, it leaks into the factory, causing discomfort to workers and causing further harm. .

The present invention was invented with the aim of eliminating such drawbacks and providing a method for cleaning and drying electrical equipment at low cost and in a short time.

This method is characterized by spraying a cleaning solution containing water or a water-soluble detergent under pressure for cleaning, heating to a low temperature in the first stage, and drying in a vacuum atmosphere.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a case where washing and drying are performed in separate equipment.

The electrical equipment E is carried into the cleaning room 3 on a table 2 that moves on a rail l, and with the door of the cleaning room 3 closed and sealed, electricity is supplied from the nozzle of the injection pipe 6 with the pump 4 installed at the base. Injection f is directed toward equipment E. At this time, the table 2 is rotated by an opening device (not shown), and the cleaning liquid is evenly sprayed with electricity to remove the adhering dirt, and the cleaning liquid flows down the bottom and drains 1'! 7, where it is filtered and returned to the liquid tank 5 for circulation. As a cleaning liquid.

First, it is degreased and cleaned using a water-soluble detergent that does not adversely affect the metal materials and insulation materials of electrical equipment, such as a solution containing a neutral detergent heated to about 80 degrees Celsius.The first step is to use warm water. However, depending on the state of the dirt, cleaning may be performed only with water, hot water obtained by heating water, or steam, and furthermore, cleaning may be performed only with a solution containing detergent.

The electrical equipment E that has been cleaned in this way is taken out of the cleaning chamber 3, and if necessary, the anti-fouling cleaning liquid is removed by blowing compressed air, and then placed in the A empty tank 11 and sealed. Open the on-off valves 13, 14, and 17 to reduce the pressure 15
After adjusting the pressure to a predetermined pressure (91), open the solenoid valve 16, introduce steam into the vacuum tank 11, and press 1! The heating device E is heated to a low temperature, for example, about 100°C. Next, the solenoid valve 16 is closed to stop the introduction of steam, and the on-off valve 19.21 of the vacuum piping 18 is closed.
The electric device E
The water droplets of the cleaning liquid and steam adhering to the vacuum tank and the water in the vacuum tank gradually evaporate while taking away latent heat from the electrical equipment E etc. as the boiling point lowers as the pressure decreases and is discharged together with the air in the separator 23. separated. If the pressure in the vacuum tank 11 becomes approximately 20 Torr, the boiling point of water will be approximately 20°C. Therefore, until the temperature of the electrical equipment E reaches approximately 20°C, the adhering moisture will continue to evaporate, drying will proceed, and the insulation resistance will recover. do.

Clean the magnetic frame of the motor and transport it to the vacuum tank? When we measured the three edge resistance values, we found that the surface temperature of the magnetic frame decreased from 100°C to 85°C 4 minutes after the start of the A empty bonzo operation, and at that time, the vacuum opening was 100 Torr and the resistance value was 100Ω.
After 28 minutes, the temperature became 75℃ + 20Torr IM
Since it showed O, it was confirmed that there was a light insulation recovery.

FIG. 2 shows a case where washing and drying are performed in the same equipment.

The electrical equipment E placed on the table 31 is in the processing chamber 3 with a sealed structure.
The cleaning liquid is carried into the processing chamber 3 and pressurized by the pump 33.
Cleaning is performed by spraying from a nozzle of a spray pipe 34 installed inside the tank 2, and the cleaning liquid flows down a drain pipe 35 at the bottom and enters a drain tank 37.

After a period of time, the liquid is returned to the liquid tank 38 and used for circulation. The cleaning liquid is heated to, for example, 80 to 90°C and then sprayed.
The inside of No. 2 and the air equipment E of No. 1 have the same temperature as the cleaning liquid. When cleaning is finished, the box 36 of the discharge pipe 35 is closed and the vacuum pipe 18. The air in the processing chamber 32 is sucked out and dried by operating the vacuum pump 22.

In this case, when cleaning is finished, the inside of the processing chamber 32 may be heated, for example, by an electric auxiliary heating device 39 and then dried, or steam may be introduced as in the case of FIG. Although it may be heated, when cleaning and drying small electrical equipment, if you use a sufficiently heated cleaning solution, you can dry it as is.

As described above, according to the present invention, since cleaning is performed using a cleaning solution containing water or a water-soluble detergent, cleaning can be carried out safely and inexpensively without any dangers that would occur when using an organic solvent, and the dirt can be cleaned easily. By selecting or heating the cleaning liquid depending on the situation, dirt such as oil, fat, dust, mud, etc. can be completely removed. Also.

Electrical equipment that has been cleaned is heated to a low temperature and dried in a vacuum atmosphere, which causes the boiling point of water to drop as the pressure drops, resulting in
By simultaneously cooling the air equipment and evaporating the adhering moisture, the internal moisture can be evaporated in a short period of time.

It is possible to plan for recovery in an extremely efficient and rational manner.

[Brief explanation of the drawing]

1 and 2 are schematic longitudinal cross-sectional views showing different embodiments of the invention. 3...Cleaning room, 4...Pump, 6...
... Injection pipe, 11 ... Vacuum tank, 12.
...Steam supply pipe. 18...K empty pipe, 22...vacuum pump, 32...processing chamber, 33...pump, 34...injection pipe. Agent Mutsumi Nozawa Aki

Claims (3)

[Claims] (1) A method for cleaning and drying electrical equipment, which comprises spraying a cleaning liquid containing water or a water-soluble detergent under pressure for cleaning, heating to a low temperature in a second step, and drying in a vacuum atmosphere. (2) The cleaning/drying method according to claim (1), wherein the electrical equipment cleaned in the cleaning room is placed in a vacuum tank, steam is introduced into the vacuum tank, the tank is heated, and then evacuated. (3) A claim in which the operations of spraying a heated cleaning liquid under pressure to clean the electrical equipment and then drying the electrical equipment heated with the cleaning liquid in a vacuum atmosphere in a single processing chamber (claim 11) Washing and drying method.