Electrode anchoring structure in crystal-growing furnaces

An electrode anchoring structure in a crystal-growing furnace, comprising:

• a graphite electrode pillar, being, at one end, provided with an external thread;
• a metal electrode pillar, including a nut base and an external screw, wherein the nut base is, at one end, provided with an internal thread hole so as to be engaged with the external thread of the graphite electrode pillar, and the nut base extends, from other end, the external screw, such that a shoulder is formed between the nut base and the external screw;
• an anchoring base, including a flange, an insulating sleeve, an insulating ring, a sealing washer, a fixing ring, a plurality of insulating rings and of bolts, wherein the flange includes a cylindrical portion and an annular portion, the cylindrical portion has a central hollow portion and the annular portion is provided with a plurality of through holes, the insulating sleeve receives the nut base of the metal electrode pillar, and which are then received together in the central hollow portion, the insulating pad has a center through hole and there are plural circular holes provided around the insulating pad, and wherein the external screw of the metal electrode pillar extends through the central hole of the sealing washer, such that the shoulder abuts upon the sealing washer, and the fixing ring is provided, circumferentially, with a plurality of fixing holes, and wherein the plural bolts extend, correspondingly, through the plural fixing holes of the fixing ring, the plural insulating rings, the plural releasing holes of the sealing washer, the plural circular holes of the insulating pad, the plural through holes of the flange, and are engaged tightly with plural nuts so as to secure together the insulating ring and the sealing washer in between the flange and the fixing ring, and wherein the flange and the sealing washer are electrically insulated from each other because they are spaced apart by the insulating sleeve, the insulating pad, and the plural insulating rings;
• and
• a locking nut, being engaged with the external screw of the metal electrode pillar so as to secure the sealing washer in between the locking nut and the shoulder of the metal electrode pillar.