Connection method of high-temperature lanthanum chromite heating element

Abstract

The invention relates to a connection method of a high-temperature lanthanum chromite heating element. The connection method is characterized by including machining a straight groove in a produced high-temperature lanthanum chromite heating element blank along the blank direction by taking the top of a cold end as a starting point, machining a spiral groove along the outer wall of the blank from the top of the blank to the inward 2-4mm position by taking the straight groove as a starting point, coating the walls of the straight groove and the spiral groove with silver paste, performing silver ink firing, reserving one end of a silver wire to the position outside a port of the straight groove, placing the other end of the silver wire into the groove along the straight groove, winding along the spiral groove, enabling the port of the straight groove at the end to extend outside, pressing connection noses on the two ends of the silver wire, fastening on the water wall of the cold end with a stainless steel clip, and connecting the heating element with a connector bar of a heating furnace body through the connecting noses. The connection method has the advantages that electrical conductivity is good, and local heating cannot occur easily; service life of the lanthanum chromite heating element is prolonged.

Description

technical field [0001] The invention relates to a wiring method for a lanthanum chromate high-temperature heating element, belonging to the field of electric heating elements. Background technique [0002] Chinese patent ZL 02 1 02689.0 provides a preparation method of lanthanum chromate material, using polyvinyl alcohol as a binder, isostatic pressing one-time molding, the blank can be cylindrical with equal diameter, and can also be produced according to user requirements, the blank The length is determined according to need. For the heating element made of the above-mentioned lanthanum chromate material, the existing wiring method is: apply silver paste on both ends of the heating element, burn off the organic matter in the silver paste, wrap it with metal foil, and fix it with a stainless steel clip . Then connect the silver wire to the stainless steel card to conduct electricity. The existing wiring method has the following disadvantages: 1. The position where the st...

AI Technical Summary

Problems solved by technology

The existing wiring method has the following disadvantages: 1. The part where the stainless steel card is stuck is prone to local heating, resulting in extremely easy damage to the components

2. When the conductive silver wire is connected with the bolts and nuts on the stainless steel card, tightening the nuts is likely to cause slippage, and loosening them will lead to poor contact and sparking.

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