Contact for a high-voltage vacuum arc extinguishing chamber

A contact for a high-voltage vacuum arc extinguishing chamber, comprising:

• a conductive connecting piece (1);
• an annular conductive outer contact (2) fixed on the conductive connecting piece (1);
• a conductive inner contact (3) fixed on the conductive connecting piece (1) is located within the annular outer contact (2) and does not contact with the outer contact (2), the conductive connecting piece (1), inner contact (3), and outer contact (2) are coaxial and an outside contact surface of the inner contact (3) is on a same plane as that of the outer contact (2);
• an axial magnetic field means (4) having a coil structure capable of generating an axial magnetic field is covered outside of the conductive connecting piece (1), the axial magnetic field means (4) is fixedly connected with the conductive connecting piece (1);
• a circumferential magnetic field means (5) located in the axial magnetic field means (4), the circumferential magnetic field means (5) having a plurality of magnetic cores capable of generating and reinforcing a circumferential magnetic field, the circumferential magnetic field means (5) is covered outside of the conductive connecting piece (1);
• a support frame (51) of the circumferential magnetic field means (5), the support frame (51) having an outer round tube (511) and an inner round tube (512) made of aluminum;
• a cavity is formed between the outer round tube (511) and the inner round tube (512) for stacking horseshoe cores (52);
• and
• a plurality of magnetic conductive sheets (54) provided within the cavity of the support frame (51), the magnetic conductive sheets (54) are bent into horseshoe shapes to form the horseshoe cores (52), the horseshoe cores (52) are stacked in a radial direction of the conductive connecting piece (1), sizes of the horseshoe cores (52) are gradually reduced in the radial direction of the conductive connecting piece (1).