Natural gas supply device of engine

Abstract

The invention belongs to the technical field of engine natural gas system fixing, and particularly relates to a natural gas system fixing frame based on an engine cylinder cover. The natural gas system fixing frame comprises a double-wall supporting pipe, the double-wall supporting pipe is fixedly connected with a natural gas inlet channel of the cylinder cover, and a natural gas injection valve is arranged at the upper end of the double-wall supporting pipe; a double-wall corrugated pipe is arranged at the upper end of the natural gas injection valve, a double-wall air supply pipe is arranged at the upper end of the double-wall corrugated pipe, the double-wall supporting pipe comprises an air cavity between the double walls, the double-wall corrugated pipe comprises an air cavity between the double walls, and the double-wall air supply pipe comprises an air cavity between the double walls; and the cylinder cover is further provided with a pressurized air inlet channel, the pressurized air inlet channel is connected with the natural gas inlet channel in an acute angle manner, air can enter an air inlet cavity, when natural gas leaks, the air inlet cavity can suck the natural gas in the air cavity from an air inlet connector, and then the concentration of the leaked natural gas is reduced.

Description

technical field [0001] The application belongs to the technical field of engine natural gas system fixing, and in particular relates to a natural gas system fixing frame based on an engine cylinder head. Background technique [0002] The statements in this section merely provide background technical information relevant to this application and do not necessarily constitute prior art. [0003] At present, marine dual-fuel and natural gas engines are mostly developed on diesel engines, and the natural gas supply system needs to be re-arranged, and the exhaust pipe, cooling water pipe, engine hoisting, valves and other components are integrated above the engine cylinder head, which makes the overall structure compact The natural gas supply system needs to have certain safety guarantees, especially the safety of natural gas transmission, and also needs to solve problems such as how to cooperate with the cylinder head. Contents of the invention [0004] In order to solve the a...

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Problems solved by technology

[0003] At present, marine dual-fuel and natural gas engines are mostly developed on diesel engines, and the natural gas supply system needs to be re-arranged, and the exhaust pipe, cooling water pipe, engine hoisting, valves and other components are integrated above the engine cylinder head, which makes the overall structure compact Complex, and the natural gas supply system needs to have certain safety guarantees, especially the safety of natural gas transmission, and also needs to solve problems such as how to cooperate with the cylinder head

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