Slow cooling device for butt weld of alloy steel pipeline

Abstract

A slow cooling device for butt welding seams of alloy steel pipelines is mainly composed of a first shell (A) and a second shell (B) in the figure 1. The shell I (A) is formed by welding a shell lower half (1), an end plate (2) and a buckle (2), filling a thermal insulation material in the shell and inserting a connecting pin (1), and the shell II (B) is formed by welding a shell upper half (1), an end plate (2) and a buckle nose (2), filling a thermal insulation material in the shell and combining the shell upper half (1), the end plate (2) and the buckle nose (2). The device is suitable for the condition that the pipeline spacing is small and dense, the heat preservation and slow cooling effects can be conveniently and effectively performed on a welded junction and pipe sections on the two sides by using the device, and cracks caused by stress generated by too high cooling speed and non-uniformity of the welded junction are avoided.

Description

Technical Field

[0001] This invention relates to a slow cooling device for butt welds of alloy steel pipes. It is suitable for situations where the pipe spacing is small and dense. Using this device, the weld joint and the pipe sections on both sides can be kept warm and cooled slowly, avoiding stress caused by excessively fast or uneven cooling, which can lead to cracks. Background Technology

[0002] According to specifications, for welds of alloy steel pipes with certain wall thicknesses and pipe diameters, post-weld heat treatment can be eliminated by taking measures such as preheating before welding and slow cooling after welding. Traditionally, when the pipe diameter and wall thickness meet the specifications, slow cooling after welding involves wrapping the weld and pipe with aluminum silicate insulation material and then securing it with wire. However, this method suffers from problems such as inadequate wrapping, poor insulation effect, cumbersome construction, wasted time, and material waste due to falling or being placed haphazardly, which does not meet national green construction requirements. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a post-weld slow cooling device. This device consists of two semicircles connected by a pin and lined with insulation material. After the two semicircles are opened, they wrap around the weld. The device is then closed and secured with clips, which provides insulation and slow cooling for the weld and the pipes on both sides. This solves the problem of traditional post-weld slow cooling methods, which require workers to promptly remove insulation material for wrapping and binding, resulting in untimely and ineffective post-weld slow cooling.

[0004] The device consists of two semi-circular shells and end caps at both ends. The shells are connected by pins on one side and have buckles on the other side. The two ends of the shells are welded to the semi-circular end caps to form a single unit, and the shells are filled with insulation material.

[0005] The technical solution adopted by this utility model to solve its technical problem consists of a post-weld slow cooling device housing 1 and a post-weld slow cooling device housing 2.

[0006] The post-weld slow cooling device consists of two housings: one side is connected by a pin, and the other side is equipped with a bayonet and a snap-fit ​​nose. The housings are filled with insulation material.

[0007] The entire device consists of detachable parts, making it easy to install and disassemble, lightweight, and reusable.

[0008] The beneficial effects of this utility model are:

[0009] This utility model is easy to use, easy to install and disassemble, and saves labor costs.

[0010] The insulation material used in this invention can be easily replaced, requires a small amount, and saves on the amount of insulation material needed.

[0011] This utility model's post-weld slow cooling device, when fastened, fits snugly against the weld joint and both sides of the pipe section, providing good heat preservation and slow cooling effects. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 A schematic diagram of the overall design of this utility model.

[0014] Figure 2 A schematic diagram illustrating the use of this utility model.

[0015] Figure 3 A disassembly diagram of this utility model.

[0016] Figure 4 A schematic diagram of the disassembly of the shell of the post-weld slow cooling device.

[0017] Figure 5 Schematic diagram of the disassembly of the shell of the post-weld slow cooling device.

[0018] Figure 3 In the middle, 1. Lower half of the shell (1 piece), 2. Upper half of the shell (1 piece), 3. End plates (4 pieces), 4. Insulation material, 5. End plate clips (2 pieces), 6. Connecting pin (1 piece) Detailed Implementation

[0019] exist Figure 1 As shown, the device consists of housing one (A) and housing two (B).

[0020] exist Figure 4 As shown, the lower half of the shell (1 piece) is welded to the end plates (2 pieces) and the buckles (2 pieces), the interior is filled with thermal insulation material, and the connecting pin (1 piece) is inserted to complete the assembly of shell one (A).

[0021] exist Figure 5 As shown, the upper half of the shell (1 piece) is welded to the end plates (2 pieces) and the snap-fit ​​noses (2 pieces), and the interior is filled with thermal insulation material to form shell two (B).

[0022] exist Figure 1 As shown, housing two (B) and housing one (A) are connected using a 6. connecting pin (1 piece) to complete the overall assembly of the device.

[0023] like Figure 2 As shown, after the weld is completed, open the device, place it on the weld, close the device, and use the clips to fix it. This will allow for heat preservation and slow cooling of the weld and the pipes on both sides.

Claims

1. A slow cooling device for butt welds of alloy steel pipes, characterized in that: It consists of two semicircles with inner insulation material connected by a pin. After the two semicircles are opened, they wrap the weld. The device is then closed and fixed with buckles, which can insulate the weld and the pipes on both sides and slow down the cooling.

2. The slow cooling device for pipe butt welds according to claim 1, characterized in that: Shell 1 and shell 2 are connected by connecting pins, and each has a bayonet and a snap-fit ​​nose on the other side. The shells are filled with thermal insulation material.

3. The slow cooling device for butt welds according to claim 1, characterized in that: The outer shells of shell one and shell two are welded to semi-circular end caps at both ends to form a single semi-circular shell.

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