Adapter device

The utility model discloses a crossover coupling device, which comprises a mounting ring provided with a positioning plug-in and a plurality of elastic hook parts distributed at intervals; the connecting pipe penetrates through the mounting ring, a lantern ring part is formed at the lower end of the connecting pipe, a gas channel is formed in the connecting pipe, the upper part of the gas channel is hermetically connected with a one-way valve assembly, and when the lantern ring part sleeves the exhaust valve assembly, the exhaust valve assembly is opened and communicated with the gas channel; when the gas tank of the portable gas stove is applied to other cooking utensils, an exhaust valve assembly of the gas tank of the portable gas stove is inserted into the lantern ring part, meanwhile, the positioning insertion piece is inserted into the notch part of the gas tank body, the lantern ring part can rotate relative to the mounting ring so that the convex part can abut against the back of the elastic hook part