Vacuum sealing joint for low-temperature tubular heating tube

• Main Authors: Tian Shuming, Gou Nannan, Su Errui, Cheng Xuefei, Zhang Xian
• Format: Patent
• Language: Chinese; English
• Published: 31.08.2016
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

The invention relates to a vacuum sealing joint for a low-temperature tubular heating tube. The vacuum sealing joint comprises a tubular spiral heating tube, a vacuum joint, a sealing ring and compression nuts, wherein the vacuum joint is fixedly connected into an installation hole of a vacuum furnace wall; conducting ends of the tubular spiral heating tube are inserted in the vacuum joint; the vacuum joint is provided with inner conical holes, and in fit connection with outer conical tables on the tubular spiral heating tube through the inner conical holes; the sealing ring is arranged between the inner conical holes and the outer conical tables; and the tubular spiral heating tube is locked and fixed, and the sealing ring is compressed on the conducting ends of the tubular spiral heating tube through the compression nuts, so as to achieve a vacuum sealing effect. The joint enables a heating component of a vacuum furnace to be directly supplied with power of 220 V instead of being supplied with power by conf