Removal tool and method of marine shafting adjusting ring bolts

Abstract

The invention belongs to the technical field of ship maintenance and particularly relates to a removal tool of marine shafting adjusting ring bolts. The removal tool comprises a drum plate in arc shape; one end of the drum plate is provided with a retaining plate perpendicular to the drum plate; the retaining plate is provided with more than two mounting holes mating with shafting adjusting ring bolt holes; a two-start bolt is fitted in each mounting hole and includes a first thread segment and a second thread segment, the first thread segment is passed through the corresponding mounting holeand is in screwed connection with two positioning nuts, and the two positioning nuts are positioned on the two sides of the retaining plate respectively; each second thread segment is in screwed connection with a connection nut. The removal tool provided herein enables shafting adjusting ring bolts to be removed more safely and more reliably, adjusting ring bolts can be removed from bolt holes more conveniently, and damage to bolt holes is decreased.

Description

technical field [0001] The invention belongs to the technical field of ship maintenance, and in particular relates to a dismantling tool and a dismantling method for ship shafting adjusting ring bolts. Background technique [0002] During ship construction, the shafting adjusting ring bolts are put into the bolt holes by freezing with liquid nitrogen. After the shafting adjusting ring bolts return to normal temperature, the diameter of the bolts becomes larger, and it is difficult to disassemble the bolts. During the disassembly process of the bolts of the marine shafting adjustment ring, a large hammer is generally used to smash the bolts, so that the bolts are slowly moved out of the bolt holes under force. Specifically include the following steps: 1. Remove the piping system, flower iron plate bracket, compartment seal and other accessories around the shaft adjustment ring, and leave as much space as possible for the hammer to knock the bolts; 2. Put the connecting nuts o...

AI Technical Summary

Problems solved by technology

[0003] As mentioned above, the existing methods for removing the bolts of the marine shafting adjustment ring are too simple, and it takes time and effort to knock the bolts only with a large hammer, and the bolts are subjected to a large impact force, and the friction force with the inner circle of the screw hole is uneven, and many The phenomenon that the bolt holes are seriously damaged occurs once, and the labor cost is high

Due to a certain process defect of the shafting, more and more ships need to remove the shafting adjustment ring. The existing technology is slow and risky, which seriously affects the progress of ship repairs.

Due to process defects or process improvements, some ship shafting adjustment ring bolts need to be disassembled and assembled many times. Once the bolt hole is damaged, it must be repaired once. The wall thickness of the bolt hole is reduced once after repairing it. The wall thickness of the bolt hole is reduced to a certain extent due to the strength requirements. It can’t be any smaller. If the wall thickness of the bolt hole is not enough, it may cause the flange and intermediate shaft of the No. 1 intermediate shaft or No. 2 intermediate shaft to be scrapped.

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