| 摘要 |
FIELD: apparatuses for applying coatings on inner surfaces of tubes, for example at restoration, insulation of main and technological pipelines in chemical, gas-oil industry branches. ^ SUBSTANCE: apparatus for application of insulation coating on inner surface of tube includes outer cylindrical housing having sections where electromagnets with positive charge are arranged. Cylindrical tool is arranged inside tube and it is embraced by winding that also has constant positive charge. Cylindrical tool includes reservoir with liquid insulation coating; heat resistant bag placed along cylindrical tool; heating member in the form of electric heater placed along shell of reservoir; compressed air bottle connected with heat resistant bag through non-return valve; power supply cell for heating member and distributing device in the form of two mutually parallel nozzles. Outer cylindrical housing is provided with rollers for moving along tube surface. Bottle with compressed air is arranged inside heat resistant bag and it is secured to wall of reservoir by means of threaded joint. At supplying power to electromagnets of outer cylindrical housing and to winding of cylindrical tool, inside tube due to action of generated magnetic field said cylindrical tool appears to be floated. Properties of generated magnetic field provide possibility for rotation of cylindrical tool along its own axis at desired revolution number. Heating member provides liquid state of insulation coating. As reservoir is subjected to action of excess pressure, after opening nozzles liquid insulation coating is applied on inner surface of tube. When pressure lowers in heat resistant bag air is automatically supplied into it through non-return valve. At cutting-off power of one of electromagnets of outer cylindrical housing, electromagnetic field in respective region is weakened and it causes shifting of cylindrical tool relative to center of tube axis. ^ EFFECT: enlarged functional possibilities of known methods and apparatuses for applying coating on inner surface of tubes. ^ 2 cl, 2 dwg |
