Eccentric lifting appliance and lifting method for marine high-pressure dual-fuel main engine cylinder cover exhaust valve

Abstract

The invention relates to an eccentric lifting appliance and a lifting method for a marine high-pressure dual-fuel main engine cylinder cover exhaust valve. The eccentric lifting appliance comprises a lifting plate, a lifting eye bolt, a connecting bolt, a plug pin and a fixing bolt, wherein the lifting plate comprises a horizontal transverse plate part and a vertical plate part which extends downwards from one end of the transverse plate part, the connecting bolt penetrates through the transverse plate part to be connected with a top threaded hole of the exhaust valve, the pin penetrates through the vertical plate part to be inserted into a hydraulic pipe mounting hole of the exhaust valve, the fixing bolt penetrates through the vertical plate part to be connected with a hydraulic pipe mounting threaded hole of the exhaust valve, then the eccentric lifting appliance is fixedly connected with a cylinder cover exhaust valve assembly, the lifting eye bolt is fixedly connected with the transverse plate part by means of threads, a connecting position is located above the gravity center of the cylinder cover exhaust valve assembly, and the eccentric lifting appliance lifts the cylinder cover exhaust valve assembly with a gas control block stably and safely by means of the lifting eye bolt. According to the lifting appliance, the influence of eccentricity caused by the gas control block on lifting is avoided, and the lifting stability and safety of the cylinder cover exhaust valve assembly with the gas control block are effectively improved.

Description

technical field [0001] The invention relates to the hoisting and transportation of diesel engine parts, in particular to an eccentric hoisting tool and a hoisting method for a marine high-pressure dual-fuel main engine cylinder head exhaust valve, and belongs to the technical field of marine diesel engine manufacturing. Background technique [0002] As the international emission regulations gradually enter the TⅢ era, in order to solve the emission problem, marine low-speed diesel engine manufacturers have introduced dual-fuel main engines that can use diesel and natural gas at the same time, and at the same time, pipeline systems for natural gas have been added to the main engine. In the high-pressure dual-fuel main engine launched by MAN, namely the GI main engine, the gas control block adopts the structural form installed on the cylinder head. Due to the heavy weight of the gas control block itself, the center of gravity of the entire cylinder head exhaust valve assembly i...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an eccentric hoist and lifting method for the cylinder head exhaust valve assembly of the MAN series GI main engine with a gas control block, and to solve the problem of using the exhaust gas. The eccentric problem caused by the hoisting of the valve with its own lifting ring screw can eliminate the tilt of the cylinder head exhaust valve assembly when hoisting, so as to ensure the stability and reliability of the cylinder head exhaust valve assembly of the dual-fuel main engine during the hoisting process, and achieve improved operation. efficiency effect

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