Boiler header connecting pipe with hot spinning hydraulic pressure end socket and machining method thereof

Abstract

The invention discloses a boiler header connecting pipe with a hot spinning hydraulic pressure end socket and a machining method thereof, and belongs to the technical field of boiler equipment manufacturing. The connecting pipe comprises a connecting pipe body, one end of the connecting pipe body is provided with the hydraulic pressure end socket in a hot spinning mode, the other end of the connecting pipe body is provided with a welding groove, a hot spinning process hole is reserved in the hydraulic pressure end socket, during a hydraulic pressure test, the connecting pipe body and a headerbody are welded and fixed, and the hot spinning process hole is blocked. According to the boiler header connecting pipe and the machining method thereof, tedious working procedures of processing the welding groove of a blocking plate, processing the blocking plate, sealing and welding the blocking plate and the like are avoided, and waste of raw materials for additionally processing the blocking plate is avoided; the hydraulic pressure end socket integrated with the connecting pipe body is firm and reliable, and the problem of leakage of the hydraulic pressure test is avoided; and for the process hole reserved by a hot spinning forming process, the strength of the process hole can meet the requirements of the hydraulic pressure test of all ultra-supercritical unit boiler headers at presentafter the process hole is blocked only by using methods such as arc welding, only the hydraulic pressure end socket needs to be cut off after the test, and therefore a large amount of manpower and material resources are saved, the production efficiency is improved, and the cost of enterprises is remarkably lowered.

Description

technical field [0001] The invention belongs to the technical field of boiler equipment manufacturing, and in particular relates to a boiler header joint with a hot spinning water pressure head and a processing method thereof. Background technique [0002] Boiler equipment is a device that heats water into high-temperature and high-pressure steam. As a key component of boiler equipment, the header is a structural form of a small-diameter connection welded on a large-diameter pipe. The header connection is connected to the boiler installation site. Heating surface pipes are welded. After the header is processed in the manufacturing plant, a hydrostatic test is required to check the reliability of the product. During the hydrostatic test, it is necessary to block all the connecting pipes of the header. Generally, there are dozens to hundreds of connecting pipes on the header, and there are even thousands of connecting pipes on the header. The existing blocking method is to w...

AI Technical Summary

Problems solved by technology

This method needs to process steps on the inner wall of the connecting pipe, and it is necessary to purchase round steel plates of the same grade as the small-diameter connecting pipes. Because the whole circle is sealed and welded, the welding workload is large; The time is relatively random, resulting in frequent leakage during the hydraulic test, which seriously affects the production efficiency; moreover, the removed round steel plate at the plugging end has been fused with the pipe wall and cannot be reused

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