Adjustable type composite sleeve for air duct penetrating through wall

• Main Authors: LI GONGPU, YU WENLONG, LIN FENG, ZHAO ZHIBIN, FENG XIPENG, WANG PEISHUO
• Format: Patent
• Language: Chinese; English
• Published: 13.03.2013
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model relates to an adjustable type composite sleeve for an air duct penetrating through a wall. The sleeve for the air duct penetrating through the wall is in a square frame structure, and is formed by connecting four side grooves and four L-shaped edge groove connecting pieces, the side edges of the two sides of each edge groove are bent to the inside of the edge groove to respectively form an inner flange, each L-shaped edge groove connecting piece comprises a L-shaped plate body, the edges of two sides of each L-shaped plate body are bent to the inside of the L-shaped plate body to respectively form a side plate, the end parts of two ends of each edge groove connecting piece are respectively inserted in a space surrounded by the corresponding edge groove and the corresponding inner flange, and each edge groove connecting piece is connected with the corresponding edge groove through rivets. The sleeve for the air duct penetrating through the wall has the advantages that the problem of improper