MICROWAVE INSTALLATION FOR MODIFICATION OF POLYMER COATINGS OF INTERNAL SURFACES OF PIPES Russian patent published in 2020 - IPC H05B6/64 

FIELD: technological processes.

SUBSTANCE: invention relates to electrothermal microwave devices and can be used in tube industry for modification of polymeric anticorrosion coatings of oil-field and tubing strings (TS), as well as in various other areas of the national economy, in which it is necessary to use pipes coated from inside with a protective polymer coating. Device consists of magnetron generator, excitation device in form of waveguide of variable cross-section shape with horn radiator at end, support chassis and closed water cooling circuit. Magnetron, excitation device and support chassis are connected to each other by means of screw and bolt fasteners. Support chassis to magnetron and water cooling circuit are laid in support chassis cavity. Using the magnetron antenna in the excitation device, microwave oscillations matched by frequency and type of wave with internal diameter of the irradiated pipe are generated. In the process of polymerisation in a furnace, a microwave installation, which is tightly brought to the pipe end, emits in the axial direction the UHF EMF tubes continuously during the coating polymerisation or in the pulse mode.

EFFECT: improved operational properties of inner protective polymer coating of pipes, increased mechanical, barrier properties and glass transition temperature, as well as reduced power consumption for heating of coating during its thermal polymerisation.

3 cl, 2 dwg