Inlet electrode sealing device for vacuum furnace

Abstract

The invention discloses an inlet electrode sealing device for a vacuum furnace. The inlet electrode sealing device comprises a furnace shell and an inlet electrode, wherein the inlet electrode is arranged in the furnace shell; a first flange is arranged on the furnace shell; the first flange is connected with a second flange and a third flange through fasteners; a first O-shaped rubber sealing ring is arranged on end faces between the first flange and the second flange; and a second O-shaped rubber sealing ring is arranged at a clearance among the inlet electrode, the second flange and the third flange. By utilizing a flange fastening device structure, the inlet electrode sealing device for the vacuum furnace can guarantee the stability of the inlet electrode, any displacement is avoided, and the sealing effect is good; when the inlet electrode sealing device is installed, the adjustment range is large; the inlet electrode sealing device is easily connected with a graphite transition electrode; and even if an insulation sleeve is deformed, the first O-shaped rubber sealing ring and the second O-shaped rubber sealing ring cannot be damaged, so that the requirements for mounting and use are met effectively, and the quality of products is improved.

Description

technical field [0001] The invention relates to a vacuum furnace inlet electrode sealing device, in particular to a vacuum furnace inlet electrode sealing device which can meet installation and use requirements and has a good sealing effect. Background technique [0002] The original vacuum furnace inlet electrode sealing device is provided with two polytetrafluoroethylene insulating sleeves between the inlet electrode and the furnace shell electrode hole, and the O-shaped rubber ring for sealing is placed between the two insulating sleeves. When installing, keep The position between the inlet electrode and the furnace shell is relatively fixed, and the nut outside the copper electrode is gradually tightened, the O-shaped rubber sealing ring expands under the extrusion of the two insulating sleeves, and finally a complete seal between the inlet electrode and the electrode hole is formed. The sealing structure of the original vacuum furnace inlet electrode seems simple, but w...

AI Technical Summary

Problems solved by technology

The sealing structure of the original vacuum furnace inlet electrode seems simple, but when the nut is tightened during installation, the inlet electrode will go out, accompanied by a little rotation, which will drive the graphite transition electrode in the furnace to rotate, and it is difficult to maintain the distance between it and the furnace shell. The position between them is relatively fixed, but if the displacement of the incoming electrode is too large, it is easy to damage the graphite transition electrode and graphite heating element in the furnace.

The gap between the inlet electrode, the insulating sleeve and the electrode hole of the furnace shell is very small, there is no room for adjustment, and it is difficult to install

During normal use, the squeeze force on the O-ring rubber seal will decrease, which will cause the seal to be damaged, resulting in a vacuum leak

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