| 摘要 |
PURPOSE: A screw coupling device for connecting flange type tube end portions of two tubes can be firmly and safely mounted as a spacer is installed and a second flange is pressed by the spacer with a fluid sealing method. CONSTITUTION: A screw coupling device (1) includes tubes (6, 18), a screw (2), a screw nut (3), a cylindrical receiving chamber (7), and a spacer (20). The tube includes flange type tube end portions (8, 17). The screw is fastened to the inside of the screw nut, thereby being mounted. The screw nut includes a front opening (4). The surface (11) of the screw nut facing the receiving chamber includes a screw-thread section (10). The screw-thread section is formed as an inner screw-thread (12). The screw-thread section is extended to the inside of the receiving chamber from the front opening to a rear opening. The cylindrical receiving chamber is extended from the front opening to the rear opening of the screw nut. The spacer is extended to the inside of the receiving chamber to be supported while maintaining a preset interval in the pre-mounting state. |
