The invention provides an improved rotary cultivator adopting an engine provided with a gas
fuel tank and an extruded tank method, and relates to a rotary cultivator with multiple safety measures. The improved rotary cultivator comprises a rotary cultivator which is driven by a four-
stroke engine provided with a minitype
propane fuel tank as well as a horizontal wide mini-
tiller which is provided with bladed protecting plates and eliminates middle
tillage missing through matching of a guide wheel and a lift-throwing type
plough. With the adoption of an outer protecting plate
assembly, the safety is further improved, and further, the outer protecting plate
assembly adopts outer protecting plates with function
waves, so that the outer protecting plates are bounced through compression deformation and have the wide damping and multi-point balance functions; the mini-
tiller adopting matching of the guide wheel and the lift-throwing type
plough and provided with the bladed protecting plates has the function of middle
tillage missing
elimination;
fuel gas is adopted for
noise reduction and emission reduction;
toxicity of harmful emissions of the
fuel gas is lower than that of harmful emissions of burning
gasoline; the emission of the
fuel gas within 40s after starting and the emission of the fuel gas during warming-up are superior to the emission of a
gasoline engine, and the safety of the whole
machine is good; the gas
fuel tank is easy to replace. According to the extruded tank method,
extrusion is performed by introducing high-pressure oil having
pressure difference with the pressure at the front part and pressure at the rear part of a prefabricated tank into a prefabricated
pipe of a forming die, and the slightly higher
pressure difference at the rear part is required due to front and rear edge losses and radians.