Header with elliptical necking end socket and manufacturing method thereof

Abstract

The invention discloses a header with an elliptical necking end socket and a manufacturing method thereof, and belongs to the technical field of metal material machining. An oval necking end socket isformed at one end of a header barrel in a hot spinning mode, a necking hole is reserved in the oval necking end socket and connected with a first pipe connector, and a plurality of second pipe connectors are connected onto the header barrel. According to the header with the elliptical necking end socket and the manufacturing method thereof provided by the invention, tedious procedures such as endsocket machining and groove welding are avoided, and the end socket and the header barrel do not need to be welded in quantity, so that potential quality hazards caused by welding are avoided, the possibility that the header end cover falls off is avoided, and the safety and the reliability in operating a thermal power generating unit are improved. Meanwhile, the necking hole left by the hot spinning process is connected with the first pipe connector, and the hole generated by the hot spinning process is utilized, so that the manpower and the material resources for opening the hole are saved,the production efficiency is improved, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of metal material machining, and in particular relates to a header with an elliptical necking head and a manufacturing method thereof. Background technique [0002] The reliability of the header plays a vital role in the normal operation of the entire unit of the power plant, such as figure 2 , at present, the head of the header is generally a welded end cover. Since a qualified weld needs to go through multiple processes such as welding, heat treatment, and non-destructive testing, if any process cannot be strictly implemented, it may cause the weld to be unqualified. The more seams there are, the greater the possible safety risk, which increases the unreliability of unit operation. [0003] In the "Journal of Physical and Chemical Inspection Physics Part Volume", article number: 1001-4012 (2014) 10-0759-04, "Analysis of the Reasons for the Fracture and Falling of the Header End Cover of a Waste Heat Boile...

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Problems solved by technology

[0002] The reliability of the header plays a vital role in the normal operation of the entire unit of the power plant, such as figure 2 , at present, the head of the header is generally a welded end cover. Since a qualified weld needs to go through multiple processes such as welding, heat treatment, and non-destructive testing, if any process cannot be strictly implemented, it may cause the weld to be unqualified. The more gaps, the greater the possible safety risk, which increases the unreliability of unit operation

[0003] In the "Journal of Physical and Chemical Inspection Physics Part Volume", article number: 1001-4012 (2014) 10-0759-04, "Analysis of the Reasons for the Fracture and Falling of the Header End Cover of a Waste Heat Boiler" mentioned that a certain unit was caused by the fall off of the header end cover. Normal operation of power plant units poses huge risks

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