Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
VAD BLOWTORCH CLEANING APPARATUS AND CLEANING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/189862
Kind Code:
A1
Abstract:
A VAD blowtorch cleaning apparatus, comprising a sweeping gas supply cabinet (21), a sweeping gas supply cabinet main pipe (22) and branch pipes, a monitoring computer (15), a PLC (16), a soft gas guide and exhaust pipe (77), automatic valves, float flow meters, and blowtorch group gas inlet pipes. By means of auxiliary devices such as the PLC (16) for controlling the automatic valves to open and close at intervals and the soft gas guide and exhaust pipe (77), a cleaning operation for the space of each layer inside a VAD blowtorch can be achieved in time and efficiently, and by means of flow control, the space of each layer inside the blowtorch can be accurately cleaned. In the process of cleaning the blowtorch, a combined deposition cavity gas suction pipe is purged by means of a high-pressure gas to form a large pressure difference between the inside and the outside of the blowtorch, so that powder impurities are synchronously suctioned out of the blowtorch and enter a waste gas recovery portion. The scaling rate at an inner layer of a quartz blowtorch is greatly reduced, the risks of bubble occurrence and optical parameter deterioration of an optical fiber preform core rod are reduced, the service life of the blowtorch is prolonged, and the production efficiency is greatly improved.

Inventors:
SHEN XIAOPING (CN)
WANG BINGQIN (CN)
HE BING (CN)
FAN ZHONGKUO (CN)
XIE XIAOHAN (CN)
DAI JIE (CN)
CHEN BIN (CN)
Application Number:
PCT/CN2020/126184
Publication Date:
September 30, 2021
Filing Date:
November 03, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TONGDING INTERCONNECTION INFORMATION CO LTD (CN)
International Classes:
B08B5/02; B08B5/04; B08B13/00; C03B37/014
Foreign References:
CN111468473A2020-07-31
CN107285617A2017-10-24
CN207952133U2018-10-12
JPH08157230A1996-06-18
JP2009114045A2009-05-28
CN202022851U2011-11-02
Attorney, Agent or Firm:
SUZHOU ZHITU INTELLECTUAL PROPERTY FIRM (CN)
Download PDF: