Single-cylinder pumping airtight tool for LGIP host

Abstract

A single-cylinder pumping airtight tool for an LGIP host is provided. The LGIP host comprises a fuel gas adaptation block, the fuel gas adaptation block is provided with a plurality of LPG interfaces, and each LPG interface comprises an LPG channel and a ventilation channel; the pumping airtight tool is fixed to the LPG interfaces through connecting bolts and comprises a body, a quick connector, a spring, a metal sealing ring and an O-shaped sealing ring, wherein an inner pipe channel and an outer pipe channel are arranged in the body, the inner end of the inner pipe channel is connected with the LPG channel in a sealed mode, the inner end of the outer pipe channel is connected with the ventilation channel in a sealed mode, and the metal sealing ring is arranged on the periphery of the inner pipe channel in a sleeving mode, clamped between the pumping airtight tool and the fuel gas adaptation block and used for sealing the LPG channel; the spring surrounds the periphery of the inner pipe channel and limits the metal sealing ring, the O-shaped sealing ring is arranged on the periphery of the body and used for sealing the ventilation channel, and the quick connector is connected to the outer end of the inner pipe channel and the outer end of the outer pipe channel. The single-cylinder pumping airtight tool is convenient to operate, does not damage a sealing surface, and meets the requirements of pumping pressure and detection of an LPG channel and a ventilation channel respectively.

Description

technical field [0001] The invention relates to the manufacture of a dual-fuel low-speed diesel engine, in particular to a single-cylinder pump pressure airtight tooling for an LGIP main engine, and belongs to the technical field of marine diesel engine manufacture. Background technique [0002] At present, dual-fuel low-speed diesel engines are more and more popular in the market, and low-speed diesel engines that only use natural gas as the second fuel cannot fully meet the market demand. Among many secondary fuels, liquefied petroleum gas (LPG) is also an economical fuel with large reserves. Especially for LPG carriers, using liquefied petroleum gas as the second fuel for diesel engines has natural advantages. [0003] The low-speed diesel engine fueled by LPG is referred to as LGIP main engine, which injects liquid petroleum gas into the combustion chamber of the diesel engine. LPG is a mixture of propane and butane, its ignition temperature is 426-537°C, the upper expl...

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Problems solved by technology

[0002] At present, dual-fuel low-speed diesel engines are more and more popular in the market, and low-speed diesel engines that only use natural gas as the second fuel cannot fully meet the market demand.

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