Title:
EXPLOSION-PROOF STRUCTURE OF DUPLEX TUBE HEATER
Document Type and Number:
Japanese Patent JP2012243407
Kind Code:
A
Abstract:
To provide an explosion-proof structure of a duplex tube heater having an explosion-proof measure of not only the body portion but also the end portion of the heater.
A duplex tube heater is obtained by enclosing a quartz tube 13 including a filament 12 in an outer tube 14 to which cooling fluid is supplied. A tube 18 for housing a lead wire is attached to the terminal of the duplex tube heater, and penetration of gas into a furnace is prevented by supplying purge air into the tube 18. The explosion-proof structure of a duplex tube heater is suitable as the heat source of the furnace which dries a work generating inflammable organic solvent vapor.
Inventors:
FUJITA TAKEKI
Application Number:
JP2011109348A
Publication Date:
December 10, 2012
Filing Date:
May 16, 2011
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
H05B3/06; F26B13/10; F26B23/04; F27B9/36; F27D11/02; H01K1/34; H01K1/58; H05B3/44; H01M4/139
Attorney, Agent or Firm:
Fumio Yamamoto
Tatsuo Watanuki
Yukine Sekine
Kita Shizuo
Tatsuo Watanuki
Yukine Sekine
Kita Shizuo