Diffusion vessel gluing bottle limiting device

The invention discloses a diffusion vessel gluing bottle limiting device. The diffusion vessel gluing bottle limiting device comprises a conical coating nozzle arranged at the upper end of a bottle cap, and the diameter of the end part of the coating nozzle is equal to the wall thickness of the side wall of a diffusion vessel; limiting clamps are arranged on the coating nozzle, and the limiting clamps are two symmetrical elastic clamping pieces which are fixed on a lantern ring; and limiting protrusions are arranged at the end parts of the inner sides between the two clamping pieces, and the distance between the inner side ends of the two limiting protrusions is smaller than the wall thickness of the side wall of the diffusion vessel by 0.2-0.5mm. According to the limiting device, the limiting protrusions are arranged on the elastic clamping pieces and are tightly attached to the side wall of the diffusion vessel, the coating nozzle can be used for carrying out uniform coating on the peripheral edge of the di