Inserting connection type connecting method for metal air pipe in civil air duct

Abstract

The invention discloses an inserting connection type connecting method for a metal air pipe in a civil air duct, and belongs to the field of metal air pipe connection. The connecting method comprises the following steps that S1, a circle of first strip steel fence is fixed at the lower part of an upper metal air pipe, and a distance is reserved between the lower edge of the first strip steel fence and the lower edge of the upper metal air pipe; S2, a circle of second strip steel fence is fixed above a lower metal air pipe, and a distance is reserved between the upper edge of the second strip steel fence and the upper edge of the lower metal air pipe; S3, the lower metal air pipe is hoisted in the civil air duct, and expansion bolts pass through a third hole to fix the lower metal air pipe on the inner side wall, far away from one side of the construction surface, of the civil air duct; and S4, the upper metal air pipe is hoisted to be aligned with the upper port of the lower metal air pipe and inserted, and the upper metal air pipe and the lower metal air pipe are tensioned and fixed. The inserting connection type connecting method for the metal air pipe in the civil air duct has the advantages that the connecting speed is fast, the metal air pipe is not displaced after being connected, and safety and reliability are achieved.

Description

technical field [0001] The invention belongs to the field of connecting metal air ducts, and in particular relates to a plug-in connection method for metal air ducts installed in civil air ducts. Background technique [0002] With the promulgation and implementation of the technical standard for building smoke prevention and exhaust systems (GB51251-2017), mandatory requirements are put forward for mechanically pressurized air supply ducts and smoke exhaust ducts installed in civil wells. Air supply (smoke exhaust), and civil air ducts should not be used, smoke prevention (exhaust) pipes should be made of non-combustible materials and the inner wall should be smooth. When the metal air duct is used as the lining air duct, the flange connection is usually used. Due to the influence of the construction surface, it is difficult or even impossible to use the flange connection. At present, there are several ways to install metal air ducts in civil air ducts: 1. The four-sided en...

AI Technical Summary

Problems solved by technology

When the metal air duct is used as the lining air duct, the flange connection is usually used. Due to the influence of the construction surface, it is difficult or even impossible to use the flange connection

At present, there are several ways to install metal air ducts in civil air ducts: 1. The four-sided enclosure (masonry) of civil engineering wells is fully hollowed out. Metal air ducts can be flanged to connect and then build masonry around them. This method is practical. It is relatively rare in engineering, the cost is high, and the construction period is also long

2. Full concrete structure shaft: This method can only be hoisted from top to bottom after the metal air duct flange connection, which is relatively rare in actual construction

Images