Preheating welding apparatus and method for marine equipment pile leg

Abstract

The invention discloses a preheating welding apparatus for a marine equipment pile leg, comprising a welding system and a base platform; the welding system includes a tubular electromagnetic heating device sleeving the pile leg, the electromagnetic heating device is peripherally provided with an induction coil, the tubular wall of the electromagnetic heating device is provided with an open groove with the outer wall provided with an automatic welding device; the base platform is provided with a driving device for driving the electromagnetic heating device to rotate relative to the pile leg and a guide support structure for supporting the electromagnetic heating device, and the base platform may slide relative to the pile leg. The pile leg is preheated by means of electromagnetic induction heating, and the apparatus may heat pile legs with different shapes and diameters, is highly universal and high in heating efficiency, and no interior and exterior temperature difference problem occurs to the pile leg. The electromagnetic heating device and the automatic welding device are rotated, with better simplicity and convenience and improved welding efficiency and welding quality provided. The invention also discloses a preheating welding method for a marine equipment pile leg.

Description

technical field [0001] The invention relates to the field of marine engineering equipment manufacturing, in particular to a preheating welding device for pile legs of marine engineering equipment and a preheating welding method thereof. Background technique [0002] With the depletion of land resources on the earth, people turn their attention to the ocean, which is rich in energy, and the development of ocean resources has become an urgent and important issue for all countries in the world. Therefore, various equipments for exploiting marine resources have emerged as the times require. In order to develop offshore wind energy resources, a wind turbine installation ship has been manufactured, which is specially used for the installation and maintenance of offshore wind turbines; in order to develop offshore oil and gas resources, a drilling platform has been manufactured to exploit oil and gas. For the above two types of marine engineering equipment, preheating and welding ...

AI Technical Summary

Problems solved by technology

Therefore, the application of this device has great limitations

[0007] 2) The preheating device adopts the method of surface heat conduction. Although the inner and outer surfaces of the pile leg are heated, the internal temperature of the steel plate is difficult to measure due to the thick steel plate of the pile leg. Therefore, the heating time is difficult to grasp. If the heating time is insufficient, It will cause the surface temperature of the steel plate to meet the requirements, but the internal temperature is still low, which will affect the quality of preheating and welding. If the heating time is too long, it will waste energy

[0008] 3) The welding seam of this method is at the top of the pile leg, and it needs to be welded at the top position, which brings great inconvenience to the operation and has certain potential safety hazards

[0009] In addition, in the prior art, when the pile legs are rotated, the mass of each piece of pile leg is very large, and the rotation is inconvenient, especially when there are many pieces of welded pile legs, the mass is greater, which makes it even more inconvenient to rotate

At the same time, when the pile leg rotates, the previously welded seam may be subjected to torsional torque before it is firm, which will cause stress and cracks inside the pile leg and affect the welding quality

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