Dry ice jet cleaning method used for generator unit, dry ice solution formula and special device for dry ice jet cleaning method

A generator set and dry ice technology, applied in cleaning methods and utensils, chemical instruments and methods, etc., can solve problems such as the influence of generator equipment, damage to the generator set, and the need for thorough cleaning, so as to eliminate pollutants and prevent pollutants from adhering. Effect

Inactive Publication Date: 2020-01-24
株洲湘水机电有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil pollution seriously erodes the insulation of the stator and rotor windings, and it needs to be thoroughly cleaned during the maintenance of the unit; the second is the generator air cooler. , causing the heat dissipation effect to decline. During the maintenance process of the unit, the air cooler needs to be thoroughly cleaned; third, the rack equipment and other parts of the generator will suffer from paint peeling and oil accumulation during the long-term operation of the unit. To a certain extent It will pose a hidden danger to the safe operation of the unit
In addition, after long-term operation of electrical equipment, etc., it is easy to accumulate dust and oil, resulting in reduced insulation performance
[0003] Because the cleaning work of generator equipment is affected by the space, cleaning work has always been a very difficult job
In addition to the impact of cleaning materials on the equipment, if you do not pay attention to the use of materials and the impact of the construction method of the cleaning work during the cleaning process, it will often cause further damage to the unit
Especially for generator stator windings, stator core ventilation slots, rotor windings, rotor yoke ventilation slots and other parts, due to the narrow space, ordinary cleaning methods basically cannot achieve the cleaning effect
[0004] The traditional cleaning method uses a charged cleaning agent for manual cleaning. The traditional cleaning method has the following disadvantages: 1) After cleaning, a large amount of cleaning agent waste liquid, contaminated cotton cloth and other waste liquid and waste materials need to be disposed of after cleaning. It takes a lot of manpower and material resources
2) have a certain impact on the environment
3) If you do not pay attention to the use of materials and improper construction methods during cleaning, it will often cause further damage to the insulation of the unit
4) The space of generator stator windings, stator core ventilation slots and other areas is narrow, and ordinary cleaning methods cannot achieve the cleaning effect

Method used

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  • Dry ice jet cleaning method used for generator unit, dry ice solution formula and special device for dry ice jet cleaning method
  • Dry ice jet cleaning method used for generator unit, dry ice solution formula and special device for dry ice jet cleaning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A dry ice blasting cleaning method applied to generator sets is: using extremely low temperature dry ice particles of -78 ℃--48 ℃, using low-pressure gas as the carrier and power, and accelerating the dry ice particles to a speed of 200-273m / s. The gun sprays and hits the cleaned surface dirt in the generator set, causing the surface dirt to suddenly cool down and cause the surface to become brittle. At the same time, these extremely low temperature dry ice gases enter the cracked pollutants, using the energy of the high-speed moving solid dry ice particles The transformation makes the dirt and oil stains attached to the surface of the stator and rotor cores and end windings rapidly freeze, thereby condensing, embrittlement, and being stripped, and at the same time, it is removed with the airflow.

[0015] The following changes will occur during the cleaning process:

[0016] 1. "Energy Transfer". The dry ice hits the surface to be cleaned at high speed, the kinetic energy ...

Embodiment 2

[0020] A dry ice blast cleaning method applied to a generator set uses a dry ice solution weight percentage formula: 80 parts dry ice, 5 parts silicone oil, 15 parts water. When cleaning electrical equipment with insulation performance requirements, the generator set dry ice blasting The cleaning method is to add silicone oil to the dry ice and spray the surface to be cleaned at high speed. During the dry ice blasting cleaning process, when the contaminants are cleaned, the surface of the equipment will be covered with an insulating layer to prevent electrical equipment from being cleaned during the cleaning process. The condensation effect forms a build-up of water vapor on the surface of electrical equipment to protect the electrical equipment. At the same time, it can block the adhesion of contaminants to a certain extent during the subsequent operation of the equipment, and play a role in insulation protection.

Embodiment 3

[0022] Such as figure 1 and figure 2 As shown, a special equipment for dry ice blast cleaning method applied to generator set, which includes low pressure air pipe 1, air pressure regulating valve 2, electric flow regulating valve 3, speed regulating motor 4, rotating ice wheel 5, dry refrigerator 6, vibration motor 7. Connect hose 8, nozzle 9, PLC control system 10 and cleaning cabinet body 11. The low-pressure gas in the workshop is connected to low-pressure air pipe 1 through a joint. Air pressure regulating valve 2 and electric flow regulating valve 3 are set on low-pressure air pipe 1, and The lower end of the refrigerator 6 is connected to the low-pressure air pipe 1 through the rotating ice wheel 5, and the rotating ice wheel 5 is connected to the speed regulating motor 4. A vibration motor 7 is provided under the dry refrigerator 6, and the outlet end 12 of the low-pressure air pipe 1 is connected to the nozzle 9 through a connecting hose 8 , The low pressure air pipe ...

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PUM

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Abstract

The invention discloses a dry ice jet cleaning method used for a generator unit, a dry ice solution formula and a special device for the dry ice jet cleaning method. The cleaning method comprises thesteps that dry ice particles with the extremely low temperature of -78--48 DEG C are adopted to be accelerated with low-pressure air as a carrier and power, and jetted out of a jetting gun at the speed of 200-273 m/s to hit against dirt on a to-be-cleaned surface in the generator unit. The special device comprises a low-pressure air pipe, an air pressure adjusting valve, an electric flow regulating valve, a variable-speed motor, a rotary ice wheel, a dry ice tank, a vibration motor, a connecting hose, a spray nozzle, a PLC system and a cleaning machine case. The dry ice jet cleaning method hasthe advantages of being simple in operation, high in cleaning efficiency, environmentally friendly, high in installation adaptability and suitable for cleaning of all large, middle and small generators, saving energy and having no special requirements for a place.

Description

Technical field [0001] The invention relates to a cleaning method and its special equipment, in particular to a dry ice blast cleaning method applied to a generator set, a dry ice solution formula and its special equipment. Background technique [0002] After the generator has been running for a period of time, many parts of the generator are easily contaminated by oil from the unit: First, the stator, rotor core, and coil surfaces of the generator will be covered with oil, and a layer of oil will accumulate at the bottom of the stator. The oil pollution seriously corrodes the insulation of the stator and rotor windings and needs to be thoroughly cleaned during the overhaul of the unit; the second is the air cooler of the generator, under the influence of oil pollution, the convection air of the random group, the oil pollution will adhere to the middle of the heat sink of the air cooler The air cooler needs to be thoroughly cleaned during the overhaul of the unit. Third, the rack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B7/00B08B13/00
CPCB08B7/0092B08B13/00
Inventor 刘立生
Owner 株洲湘水机电有限责任公司
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