Mounting method for air duct external flange of rail vehicle

Abstract

The invention relates to a mounting method for an air duct external flange of a rail vehicle. The air duct external flange comprises an external flange cylinder and an external flange edge, wherein the external flange cylinder is formed by arranging four wing plates in a surrounding manner; the bottom ends of the left and right wing plates of the external flange cylinder are flush with that of the external flange edge. The mounting method comprises the following steps: putting the pre-welded air duct external flange on the vehicle; moving the air duct external flange to an appointed position to ensure that the left and right wing plates of the external flange cylinder together with the external flange edge fall on a flat top plate of the vehicle while the four wing plates of the external flange cylinder are propped against a middle end top plate of the vehicle; welding the bottom ends of the left and right wing plates of the external flange cylinder and the bottom end of the external flange edge with the flat top plate of the vehicle through spot welding, and welding the four wing plates of the external flange cylinder with the middle end top plate of the vehicle through spot welding, so as to fix the air duct external flange; welding the four wing plates of the external flange cylinder with the middle end top plate of the vehicle through full welding. The air duct external flange mounted according to the mounting method has the advantages that the mounting requirement of an air conditioner external air duct and the sealing requirement of a steel structure of a vehicle body can be met simultaneously; the structure is simple; the technology is easy to realize.

Description

technical field [0001] The invention relates to a method for installing an outer flange of a rail vehicle air duct, and belongs to the technical field of rail vehicle body structure design. Background technique [0002] The flat top 7 in the steel structure of the rail passenger car roof is mainly used to install the air conditioning unit 4, the middle end top 1 divides the air duct connected to the air conditioner into two, the outer air duct 5 is outside the middle end top 1, and the middle end top 1 is the outer air duct 5. Inside the top 1 is the inner air duct 6, and the two are connected by the inner and outer flanges 3 and 2 of the steel structure air duct, such as figure 1 shown. [0003] The inner and outer flanges of the air duct are connected at the top of the middle part. In order to ensure the sealing performance after connection, the outer flange of the air duct needs to be fully welded with the top of the middle part ( figure 1 Arrow), but the premise of ful...

AI Technical Summary

Problems solved by technology

[0004] The development of rail transit is changing with each passing day, and there are more and more types of rail vehicles. The height of the roof of each rail vehicle project and the height of the flat roof for installing air conditioners are also different. In recent years, there have been many cases where the outer flange of the air duct is full Situations where welding cannot be achieved

In order to ensure the sealing performance of the car body, the interface between the lower opening of the outer flange of the air duct and the top of the middle part is glued, but the sealing is not ideal. It is necessary to innovate a structure of the outer flange of the air duct at the top of the middle part, which can meet the needs of both the inside and outside of the air conditioner. The installation requirements of the air duct and the sealing performance of the steel structure of the car body here

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