| abstract |
The present invention relates to a rechargeable butane gas cylinder which is widely used as a fuel of a portable gas burner, the upper and lower gas cylinder bodies (1) sealed with upper and lower caps (2 and 3), respectively; An inlet pipe 4 welded so that an upper protrusion 5 in the center of the upper cap 2 protrudes out of the upper cap 2, and an internal thread 6 formed inside the protrusion 5; A spring 7 inserted into the inlet pipe 4; A nozzle (8) seated on top of the spring (7); A packing 9 fitted to the nozzle 8; A nozzle cap (10) having a through hole (11) formed to be fitted to an upper portion of the nozzle (8), and having a male screw (12) coupled to a female screw (6) of the inflow pipe (4) at a lower circumference thereof; It includes a seating plate 13 fitted to the outside of the protruding portion 5 of the upper part of the inlet pipe 4 and fixed to the nozzle cap 10 to enable refilling of the gas cylinder used for single use, and at the same time, when the packing wears easily. Only the packing can be replaced to prevent the environmental pollution caused by the once used and discarded gas cylinders, and to enable efficient resource recycling. |