A method for expanding a quartz tube and a special blowtorch device

Abstract

The invention discloses a tube expanding method of a quartz tube. The tube expanding method comprises the following steps that firstly a main quartz tube is arranged on a left clamping head and a right clamping head of a tube expanding machine; a blowlamp device on a middle tray device of the tube expanding machine is started, and simultaneously the left clamping head and the right clamping head rotate synchronously to drive the main quartz tube to rotate; in rotation, the local part of the main quartz tube is heated, the heated part of the main quartz tube is in a semi-melted state, and the main quartz tube in the semi-melted state expands outwards under the action of centrifugal force generated by rotation; under the action of a tube-expanding supporting wheel on the middle tray device, sizing is carried out; after being sized, the tube is transferred to a cutting machine to cut off waste materials clamped at the two ends. The tube expanding method disclosed by the invention has the advantages that since a cold water tank is arranged on the middle tray device, the diameter of the quartz tube after being expanded can be fast and accurately maintained; since the special blowlamp device is arranged in tube expansion, the working efficiency of tube expansion and the tube expanding quality are improved, the gas blowing noise is reduced, the gas inflow is reduced, the air contact opportunity is increased, the use efficiency of gas is improved and the energy is saved.

Description

technical field [0001] The invention relates to a quartz tube expansion process, in particular to a quartz tube expansion method and a special blowtorch device. Background technique [0002] At present, the expansion of domestically produced large-diameter quartz tubes generally adopts the uniform-speed centrifugal tube expansion method, and the blowtorch used in the process of tube expansion by the uniform-speed centrifugal tube expansion method has problems such as high noise, serious gas waste, and slow melting speed. As a result, the tube expansion efficiency is low, and the tube expansion effect is not good. At the same time, there are more or less uneven wall thicknesses in the tube expansion process, so that the large-diameter quartz tube after tube expansion cannot meet the technical requirements. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a quartz tube expansion method that is reasonable in design, ...

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Problems solved by technology

[0002] At present, the expansion of domestically produced large-diameter quartz tubes generally adopts the uniform-speed centrifugal tube expansion method, and the blowtorch used in the process of tube expansion by the uniform-speed centrifugal tube expansion method has problems such as high noise, serious gas waste, and slow melting speed. As a result, the expansion efficiency is low, and the expansion effect is not good. At the same time, there are more or less uneven wall thicknesses in the expansion process, so that the large-diameter quartz tube after expansion cannot meet the technical requirements.

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