Method for preventing pipe plates from welding deformation through strip surfacing of high-pressure air cooler pipe plates

Abstract

A method for preventing pipe plates from welding deformation through strip surfacing of high-pressure air cooler pipe plates comprises the following steps that firstly, the periphery of the first pipe plate and the periphery of the second pipe plate are welded together through a plurality of connecting plates and then placed on a surfacing platform and a clamp, a welding machine head conveys a welding belt, a first alloy layer is formed on the surface of the first pipe plate in a surfacing manner, a workpiece is overturned, a first alloy layer is formed on the surface of the second pipe plate in a surfacing manner, and the workpiece is overturned again; and a second alloy layer is formed on the surface of the first pipe plate in a surfacing manner, then the workpiece is overturned, and a second alloy layer is formed on the surface of the second pipe plate in a surfacing manner. The method solves the problem about surfacing deformation of single pipe plates, the requirement for the assembly precision of the air cooler pipe plates and a heat exchange pipe is met, meanwhile, the straightening procedure after surfacing of the pipe plates is reduced, and the production efficiency is improved.

Description

technical field

[0001] The invention relates to a method for preventing welding deformation of the tube plate by surfacing welding of the tube plate of a high-pressure air cooler. Background technique

[0002] The high-pressure air cooler is one of the key devices in the hydrocracking system of the refinery. Leakage of the air cooler due to corrosion will lead to abnormal shutdown of the entire hydrogenation unit, resulting in huge economic losses and directly affecting the safety of production. In order not to greatly increase the equipment investment cost and prolong the service life of the device, the high-pressure air cooler of the new hydrogenation device is manufactured by overlaying corrosion-resistant nickel-based superalloy on the surface of the carbon steel pipe plate, which can greatly improve the anti-corrosion performance of the air cooler , to realize the optimization of the hydrogenation unit in terms of safety and economy. However, the tube sheet of the air...

Examples

Embodiment 1

[0009] Such as figure 1 Shown, a kind of high-pressure air-cooler tube plate belt pole surfacing welding method to prevent the tube plate from welding deformation is as follows: first, the first tube plate 3 and the second tube plate 4 are welded together through a plurality of connecting plates 5 around, and then Placed on the surfacing platform and fixture 6, the welding head 1 conveys the welding strip 2, a layer of alloy is surfacing on the surface of the first tube plate 3, the workpiece is turned over, and a layer of alloy is surfacing on the surface of the second tube plate 4. One layer of welding conditions is: surfacing current 800A, voltage 28V; Flip the workpiece again, surfacing the second layer of alloy on the surface of the first tube plate 3, then turn over the workpiece, and surfacing the second layer of alloy on the surface of the second tube plate 4, The welding conditions of the second layer are: surfacing welding current 705A, voltage 28V, surfacing welding...

Embodiment 2

[0011] A method for preventing welding deformation of the tube plate by surfacing welding of the tube plate of a high-pressure air cooler is as follows: firstly, the first tube plate 3 and the second tube plate 4 are welded together through a plurality of connecting plates 5 around the first tube plate 3 and the second tube plate 4, and then placed in the pile On the welding platform and fixture 6, the welding head 1 conveys the welding strip 2, and a layer of alloy is surfacing on the surface of the first tube plate 3, the workpiece is turned over, and a layer of alloy is surfacing on the surface of the second tube plate 4, and the first layer of welding The conditions are: surfacing current 900A, voltage 26V; turn over the workpiece again, surfacing the second layer of alloy on the surface of the first tube plate 3, then turn over the workpiece, and surfacing the second layer of alloy on the surface of the second tube plate 4, the second layer The welding conditions are: surf...

technical field

[0001] The invention relates to a method for preventing welding deformation of the tube plate by surfacing welding of the tube plate of a high-pressure air cooler. Background technique

[0002] The high-pressure air cooler is one of the key devices in the hydrocracking system of the refinery. Leakage of the air cooler due to corrosion will lead to abnormal shutdown of the entire hydrogenation unit, resulting in huge economic losses and directly affecting the safety of production. In order not to greatly increase the equipment investment cost and prolong the service life of the device, the high-pressure air cooler of the new hydrogenation device is manufactured by overlaying corrosion-resistant nickel-based superalloy on the surface of the carbon steel pipe plate, which can greatly improve the anti-corrosion performance of the air cooler , to realize the optimization of the hydrogenation unit in terms of safety and economy. However, the tube sheet of the air...

Examples

Embodiment 1

[0009] Such as figure 1 Shown, a kind of high-pressure air-cooler tube plate belt pole surfacing welding method to prevent the tube plate from welding deformation is as follows: first, the first tube plate 3 and the second tube plate 4 are welded together through a plurality of connecting plates 5 around, and then Placed on the surfacing platform and fixture 6, the welding head 1 conveys the welding strip 2, a layer of alloy is surfacing on the surface of the first tube plate 3, the workpiece is turned over, and a layer of alloy is surfacing on the surface of the second tube plate 4. One layer of welding conditions is: surfacing current 800A, voltage 28V; Flip the workpiece again, surfacing the second layer of alloy on the surface of the first tube plate 3, then turn over the workpiece, and surfacing the second layer of alloy on the surface of the second tube plate 4, The welding conditions of the second layer are: surfacing welding current 705A, voltage 28V, surfacing welding...

Embodiment 2

[0011] A method for preventing welding deformation of the tube plate by surfacing welding of the tube plate of a high-pressure air cooler is as follows: firstly, the first tube plate 3 and the second tube plate 4 are welded together through a plurality of connecting plates 5 around the first tube plate 3 and the second tube plate 4, and then placed in the pile On the welding platform and fixture 6, the welding head 1 conveys the welding strip 2, and a layer of alloy is surfacing on the surface of the first tube plate 3, the workpiece is turned over, and a layer of alloy is surfacing on the surface of the second tube plate 4, and the first layer of welding The conditions are: surfacing current 900A, voltage 26V; turn over the workpiece again, surfacing the second layer of alloy on the surface of the first tube plate 3, then turn over the workpiece, and surfacing the second layer of alloy on the surface of the second tube plate 4, the second layer The welding conditions are: surf...

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