Method for excavating, replacing and repairing condenser shell connected air pocket

Abstract

The invention discloses a method for excavating, replacing and repairing a condenser shell connected air pocket. The method comprises the following steps of cutting to form a notch on the outer edge of an air bag of the damaged connected air pocket by using an electric grinding wheel, and stuffing a fireproof flame-retardant material into a condenser shell from the notch to shield a copper pipe inthe shell, gradually cutting off the damaged conjoined air pocket from the notch by using a wind cutter; polishing the notch of the condenser shell from which the connected air pocket is cut off to be flat; manufacturing a new air pocket, and welding the new air pocket to the cut-off position of the original connected air pocket of a condenser; manufacturing a fastening belt, drilling a through hole in the fastening belt, and performing method on the fastening belt to be assembled on the outer edge of the air bag of the new air pocket; manufacturing a plunger matched with the through hole insize, and welding the plunger to the through hole; and testing the sealing performance of the condenser. According to the method for excavating, replacing and repairing the condenser shell connected air pocket, excavating, replacing, welding and repairing can be conducted on the condenser shell conjoined air pocket, a boiler condenser can be repeatedly used, and the service life of the condenser is prolonged.

Description

technical field [0001] The invention relates to the technical field of excavation, replacement and repair, and in particular to a method for excavation, replacement and repair of a connected air bag of a condenser shell. Background technique [0002] The condenser of the ship boiler is divided into an atmospheric condenser and a boiler condenser. The atmospheric condenser uses the steam collected from the boiler to heat the fuel oil, the heating pipe in the oil tank, and the use of steam to supply the operation of the steam engine turbine and other equipment and facilities. The boiler condenser is to use the steam of the boiler to heat the water for the crew's domestic water and for the warm cylinder when the main engine starts. [0003] Please also see figure 1 and figure 2 ,in figure 1 It is a schematic diagram of the structure of the boiler condenser described in an embodiment of the present invention before it is repaired; figure 2 yes figure 1 A cross-sectional v...

AI Technical Summary

Problems solved by technology

With the prolongation of the use time of the boiler condenser, the one-piece gas bag 2 will be rotted continuously under the influence of humid steam. If it is a local small area of ​​rot, it can be repaired by repair welding or double plate, and it is easy to be damaged during repair welding. The thin-walled copper pipe 7 in the air cavity causes water leakage in the water cavity, so when the conjoined gas bag 2 is rotted in a large area, it is difficult to repair it by the above method, and the boiler condenser needs to be replaced as a whole, including the shell 1, The one-piece gas bag 2 and the internal copper tubes are replaced as a whole. If the copper tubes inside the condenser are intact, the overall replacement will cause a waste of resources, and the long replacement and maintenance period will affect the ignition of the boiler, thereby affecting The commissioning of various equipment and facilities will increase the cost of ship repairs and bring economic pressure to ship owners

In addition, whether it is a one-piece gas bag repaired by repair welding or a whole-replaced one-piece gas bag, after long-term use, the bottom of the one-piece gas bag will accumulate water formed by steam, which will accelerate the decay of the one-piece gas bag and cause damage. Affect the service life of the condenser

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