Patent ID: 11908619
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  F | IPC H

Claim 0:
1. An electromagnetic device for protection of a metal pipeline (2) used for transmission of liquid hydrocarbons therethrough to prevent adhesion of impurities dissolved in said liquid hydrocarbons to an inner surface of the pipeline (2); said device comprising:
a case (1) secured on the pipeline (2) by at least two loop-shaped flexible tapes (3), said case (1) has a top cover (23);
a power supply unit (11) mounted in the case (1) and providing said device with electrical energy;
a radiating antenna (5) transmitting an electromagnetic wave further propagating along the pipeline (2), wherein the radiating antenna (5) is made in the form of an electrically insulated wire (28) wound on the pipeline (2), and wherein the wire (28) represents a first plate of a virtual capacitor (Ce), while a second plate of said virtual capacitor (Ce) is represented by an outer surface (30) of the pipeline (2);
a central processing unit CPU (6) controlling operation of said electromagnetic device, wherein the CPU (6) is enclosed in the case (1);
an antenna amplifier (7) exciting said electromagnetic wave in the radiating antenna (5), wherein the antenna amplifier (7) is enclosed in the case (1), and wherein the antenna amplifier (7) further includes:
a solenoid (L1) for accumulating energy of magnetic field;
a high voltage MOSFET transistor (VT1) essentially controlling discharging the energy of magnetic field into the radiating antenna (5), said transistor (VT1) is connected to the solenoid (L1);
a buffer high-voltage capacitor (C1) protecting the transistor (VT1) from surges of overvoltage, said capacitor (C1) is parallel-connected to said transistor (VT1) and series-connected to the solenoid (L1);
a passing capacitor (C2) series-connected to the solenoid (L1), and said passing capacitor (C2) is series-connected to the radiating antenna (5) and the virtual capacitor (Ce), wherein said passing capacitor (C2), radiating antenna (5) and the virtual capacitor (Ce) are parallel-connected to said transistor (VT1);
an antenna current sensor (21), providing information about a current signal of the radiating antenna (5) to the CPU (6); and
a voltage sensor (22) providing information about a voltage level on the solenoid (L1) to the CPU (6);

an electrical connector (8) secured in the top cover (23), and connecting the radiating antenna (5) to the antenna amplifier (7);
an electromagnetic screen (9) mounted within the case (1) and enclosing the CPU (6) and to the antenna amplifier (7); and
a display panel (10) for visual monitoring of status and operation of said device, wherein the display panel (10) is mounted on a side surface of the case (1).