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.