A heat insulation auxiliary device for preheating equipment during welding

Abstract

The utility model relates to welding equipment and process auxiliary field, concretely is a kind of heat insulation auxiliary device when welding weld needs preheating equipment, including cambered cover, arc vertical board, roller, the bottom surface both sides of cambered cover are symmetrically equipped with arc vertical board, and several rollers are installed between the arc vertical board of both sides, and several rollers can roll along the inner wall surface of the cylinder to be welded.Cambered cover is formed by steel plate pressing arc;The camber of arc vertical board is adapted with the inner camber of the cylinder to be welded;Roller is formed by round steel processing, and it is ladder shaft structure with large middle diameter and small two end diameters, and its small diameter end is adapted with bearing assembly, and it is connected with arc vertical board by bearing.The utility model design is reasonable, realizes the welding of the welding equipment needing preheating, and also avoids the direct contact of welding personnel with heating cylinder, guarantees the life safety of worker, and heat insulation device can rotate with cylinder, improves work efficiency, reduces labor intensity, and has good practical application value.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment and process assistance, specifically a heat insulation auxiliary device for preheating equipment when welding welds. Background Technology

[0002] Many chemical equipment components require heating to a certain temperature before welding due to material requirements (such as 15CrMoR). 15CrMoR is a commonly used low-alloy heat-resistant steel (belonging to the Cr-Mo series pearlitic heat-resistant steel, mainly used in the manufacture of high-temperature pressure equipment (such as pressure vessels, boiler components, etc.). Due to its high content of alloying elements (Cr, Mo), its weldability is relatively poor. Preheating can reduce the cooling rate of the weld and heat-affected zone, avoid excessive martensite formation, and promote hydrogen escape during welding ("dehydrogenation"), reducing cracking. Risks. Preheating can reduce the temperature gradient of the weld joint, decrease shrinkage stress during cooling, and prevent cracks caused by stress concentration. For thick plates or in low ambient temperatures, preheating can improve the plasticity of the metal, enhance the fluidity of the weld pool, and reduce defects such as incomplete fusion and porosity. For special materials, preheating is an essential step before welding, with the preheating temperature controlled between 150 and 200°C. Because excessively high preheating temperatures make it difficult for operators to work near the weld for extended periods, this invention provides a heat insulation device for welders during preheating. Utility Model Content

[0003] The purpose of this utility model is to provide a heat insulation auxiliary device for welding equipment that requires preheating during welding, which is convenient to use and easy to install.

[0004] This utility model is achieved using the following technical solution:

[0005] A heat insulation auxiliary device for equipment requiring preheating during welding includes an arc-shaped cover plate, an arc-shaped vertical plate, and rollers;

[0006] The bottom surface of the arc-shaped cover plate is symmetrically provided with arc-shaped vertical plates on both sides, and several rollers are installed between the arc-shaped vertical plates on both sides. The rollers can roll along the inner wall surface of the cylinder to be welded.

[0007] More preferably, both ends of the roller are respectively assembled into the preset positioning holes of the arc-shaped vertical plate by bearings.

[0008] In a further preferred embodiment, a set of rollers is provided at both ends and the middle between the two curved uprights on both sides.

[0009] More preferably, the curvature of the arc-shaped cover plate is adapted to the inner curvature of the cylinder to be welded.

[0010] Preferably, the distance between the two curved vertical plates is not less than the width of the axial preheating zone of the cylinder to be welded.

[0011] During assembly, firstly, the curved cover plate is machined to the desired arc shape, ensuring a precise match between the arc of the cover plate and the outer arc of the cylinder to be welded. Then, the small end of the roller is inserted into the bearing and securely fixed. The two ends of the roller with the bearing installed are then embedded into the positioning holes of the curved vertical plate. Ensure coaxial alignment and that the outer ring of the bearing fits snugly against the inner wall of the positioning hole. Next, the curved vertical plates are installed sequentially along the length of the curved cover plate, ensuring even spacing. Finally, the curved cover plate is placed over the surface of the cylinder to be welded, adjusted until the arc is fully fitted, completing the assembly.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This invention avoids direct contact between welders and the heating cylinder, thus ensuring the safety of workers.

[0014] This invention requires no manual intervention, thus improving work efficiency and reducing labor intensity.

[0015] 3. This utility model has a simple and convenient design, and is easy to install. It is also easy to disassemble and maintain after use.

[0016] This utility model is reasonably designed, enabling welding of equipment requiring preheating, and avoiding direct contact between welders and the heating cylinder, thus ensuring worker safety. The heat insulation device rotates with the cylinder, improving work efficiency and reducing labor intensity, and has good practical application value. Attached Figure Description

[0017] Figure 1 This shows a schematic diagram of the tooling structure.

[0018] Figure 2 This represents a top view of the tooling structure.

[0019] Figure 3 A schematic diagram of an arc-shaped vertical plate structure.

[0020] Figure 4 This is a schematic diagram of the roller structure.

[0021] Figure 5 This is a schematic diagram showing the operation of the heat insulation device.

[0022] Figure 6 This diagram shows the location of the insulation device.

[0023] In the figure, 1-arc cover plate, 2-arc vertical plate, 3-roller, 4-bearing, 5-cylinder, 6-heat insulation device, 7-heating device, 8-circumferential weld, 9-automatic welding machine, 201-positioning drill hole. Detailed Implementation

[0024] To enable those skilled in the art to better understand this utility model, the following description, in conjunction with the accompanying drawings, will provide a clearer and more complete account of the utility model.

[0025] This utility model provides a heat insulation auxiliary device for equipment that requires preheating during welding. The heat insulation device 6 includes an arc-shaped cover plate 1, an arc-shaped vertical plate 2, and a roller 3.

[0026] like Figure 1 As shown, the bottom surface of the arc-shaped cover plate 1 is symmetrically provided with arc-shaped vertical plates 2 on both sides, and several rollers 3 are installed between the arc-shaped vertical plates 2 on both sides. The rollers 3 can roll along the axial preheating zone of the inner wall surface of the cylinder 5 to be welded.

[0027] like Figure 2 As shown, the arc-shaped cover plate 1 is formed by pressing steel plate into an arc; the arc of the arc-shaped vertical plate 2 is adapted to the inner arc of the cylinder 5 to be welded; the roller 4 is formed by processing round steel and has a stepped shaft structure with a large diameter in the middle and small diameters at both ends. Its small diameter end is adapted to be assembled with the bearing 3 and connected to the arc-shaped vertical plate 2 through the bearing 3.

[0028] like Figure 4 As shown, the two ends of the roller 3 are respectively assembled into the pre-set positioning holes 201 of the arc-shaped vertical plate 2 via bearings 4. Figure 3 As shown, a set of rollers is installed at both ends and the middle between the two curved uprights 2. For example, the set of rollers at both ends has 4 rollers each, and the set of rollers in the middle has 3 rollers. Figure 1 As shown, the curvature of the arc-shaped cover plate 1 matches the inner curvature of the cylinder 5 to be welded. Figure 3 As shown, the distance between the two arc-shaped vertical plates 2 is not less than the width of the axial preheating zone of the cylinder 5 to be welded.

[0029] During assembly, firstly, the curved cover plate 1 is machined to the desired arc shape, ensuring that the curvature of the curved cover plate 1 precisely matches the outer arc of the cylinder 5 to be welded. Then, the small end of the roller 3 is inserted into the bearing 4 and secured firmly. The two ends of the roller 3 with the bearing 4 assembled are then embedded into the positioning holes 201 of the curved vertical plate 2. This ensures coaxial alignment and that the outer ring of the bearing 4 fits snugly against the inner wall of the positioning hole 201. Next, the curved vertical plates 2 are installed sequentially along the length of the curved cover plate 1, ensuring even spacing. Finally, the curved cover plate 1 is placed over the surface of the cylinder 5 to be welded, and adjusted until the curvature is fully fitted, completing the assembly.

[0030] At work, such as Figure 5 , Figure 6As shown, the assembled heat insulation device 6 is mounted on the axial preheating area of ​​the cylinder 5 to be welded via roller 3. The heat insulation device 6 is located on one side of the annular weld 8 (automatic welding machine 9), and the heating device 7 is located below the annular weld 8 of the cylinder 5 to preheat the weld area. The welding personnel can squat on the heat insulation device 6 to operate the automatic welding machine 9 for welding.

[0031] When the cylinder 5 rotates for circumferential welding, the roller 3 rotates to keep the heat insulation device 6 in its original position (always at the bottom of the cylinder), without the need for manual intervention, thus providing continuous heat insulation protection for the welding personnel.

[0032] The present invention provides a heat insulation auxiliary device for preheating equipment during welding, which avoids direct contact between the welder and the heating cylinder. The heat insulation device rotates with the cylinder, improving work efficiency and reducing labor intensity, and has good practical application value.

[0033] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A heat insulation auxiliary device for preheating equipment during welding, characterized in that: Includes curved cover plate (1), curved vertical plate (2), and roller (3); The bottom surface of the arc-shaped cover plate (1) is symmetrically provided with arc-shaped vertical plates (2) on both sides, and several rollers (3) are installed between the arc-shaped vertical plates (2) on both sides. The rollers (3) can roll along the axial preheating zone of the inner wall surface of the cylinder (5) to be welded.

2. The heat insulation auxiliary device for preheating equipment during welding as described in claim 1, characterized in that: The two ends of the roller (3) are respectively assembled into the preset positioning holes (201) of the arc-shaped vertical plate (2) through bearings (4).

3. A heat insulation auxiliary device for preheating equipment during welding according to claim 1 or 2, characterized in that: A set of rollers is provided at both ends and the middle of the arc-shaped vertical plates (2) on both sides.

4. A heat insulation auxiliary device for preheating equipment during welding according to claim 1 or 2, characterized in that: The curvature of the arc-shaped cover plate (1) and the arc-shaped vertical plate (2) is adapted to the inner curvature of the cylinder (5) to be welded.

5. The heat insulation auxiliary device for preheating equipment during welding as described in claim 1, characterized in that: The distance between the arc-shaped vertical plates (2) on both sides is not less than the width of the axial preheating zone of the cylinder (5) to be welded.

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