Crucible lifting type quartz glass continuous melting furnace with adjustable forming area temperature

Abstract

The invention provides a crucible lifting type quartz glass continuous melting furnace with an adjustable forming area temperature. The crucible lifting type quartz glass continuous melting furnace with adjustable forming area temperature comprises a crucible (1), a furnace body (2), a heater (3), a core bar (4) and a forming mold (5), wherein the crucible (1) is arranged in the furnace body (2); the heater (3) is electrically connected to a main electrode (12) and covers the outer circle of the crucible (1); and the lower end of the core bar (4) stretches into the crucible (1) and is opposite to the forming mold (5). The crucible lifting type quartz glass continuous melting furnace with adjustable forming area temperature is characterized in that a through hole is formed in the middle of a furnace cover (6); a crucible lifting base (20) is arranged in the through hole; the upper end of the crucible (1) is supported on the crucible lifting base (20); the adjustment and location of the crucible lifting base (20) in the through hole along a height direction are realized by at least three groups of feed screw nut structures (21) arranged on the furnace cover (6), then the distance between the bottom of the core bar and the forming mold is adjusted, and the adjustment of the pipe diameter of a quartz pipe bar (10) is realized. The crucible lifting type quartz glass continuous melting furnace with adjustable forming area temperature realizes the online adjustment of pipe diameter of quartz pipe products on the premise of no need for change of the forming mold and is simple in structure and convenient to adjust.

Description

technical field [0001] The invention relates to a quartz technology, in particular to a quartz melting furnace technology, in particular to a crucible lifting type quartz glass continuous melting furnace with adjustable temperature in the forming area. Background technique [0002] At present, various types of electric heating continuous furnaces used in the production of quartz glass tubes in China adopt fixed crucibles, and the heating element made of tungsten material around the crucible has in common that any cross section of the heating element is equal, which shows that in production During the process, the heat emitted by the heating element is basically constant in the longitudinal distribution, and the longitudinal temperature of the crucible cannot be adjusted. The production process of the quartz glass tube in the crucible and the crucible outlet is: preheating zone-melting zone-exhaust zone-forming zone. Due to the different specifications and varieties of quart...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the temperature of the forming area cannot be adjusted and the size of the quartz product cannot be adjusted due to the fixed structure of the crucible in the existing classical continuous melting furnace. The size of the forming zone temperature adjustable crucible lifting type quartz glass continuous melting furnace

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