High-energy compressed natural gas (CNG) filling device

The utility model discloses a high-energy compressed natural gas (CNG) filling device, which is characterized by comprising an outer shell, a flow shunting device and a pressure-limiting valve, wherein the pressure-limiting valve is arranged on an inlet manifold of the device and is used for limiting the pressure of the input CNG; an inlet main valve is arranged on the inlet manifold and is used for controlling the input CNG; the pressure-limiting valve is directly communicated with the inlet main valve; a synergist filling port is correspondingly formed at the upper end of the flow shunting device; the synergist filling port and the inlet manifold are communicated with the flow shunting device; a synergist control valve is arranged on a corresponding synergist filling pipeline of the synergist filling port; the high-energy CNG filling device also comprises a plurality of branch pipes connected with a gas storage cylinder; and the branch pipes are simultaneously communicated with the flow shunting device. After the synergist is added into the CNG, the highest flame temperature is 3,300 DEG C, and the device can be used for heating in industries such as metal cutting and welding and kilns, glass and ceramics. The overall device has the advantages of simple structure, reasonable design and convenience in use, the natural gas is filled, and the synergist can be mixed with the natural gas, so that the combustion temperature is raised.