Electric heating tube installation structure, electric heating tube boiler and electric steam generator

Abstract

The present invention discloses an electric heating pipe installation structure, comprising a tube sheet, an electric heating pipe body, a first cylinder portion and a second cylinder portion; a through hole is opened on the tube sheet, the through hole comprises a first circular hole portion and a conical hole portion, the conical hole portion is connected with the first circular hole portion and the second circular hole portion, and the wide-diameter end of the conical hole portion is connected with the first circular hole portion, and the narrow-diameter end of the conical hole portion is connected with the second circular hole portion, the first cylinder portion is connected with the second cylinder portion, the inner wall surface of the first cylinder portion and the inner wall surface of the second cylinder portion are located on the same cylindrical surface, the outer wall surface of the first cylinder portion is cylindrical, the outer wall surface of the second cylinder portion is frustum-shaped, the outer wall surface of the second cylinder portion is used to close the conical hole portion, a thread is provided on the outer wall of the first cylinder portion, a thread is provided on the hole wall of the first circular hole portion, and an outer transition ring groove is provided between the outer wall surface of the first cylinder portion and the outer wall surface of the second cylinder portion.

Images