Sealing valve and closed structure anesthetic bottle

A sealing valve, comprising:

• a guiding tube, configured for guiding an anesthetic from an outer packaging bottle to an anesthesia vaporizer, and comprising a first end configured to be inserted into the outer packaging bottle and a second end configured to be connected to the anesthesia vaporizer;
• a convex ring, provided at an outer peripheral surface of the first end, protruding toward an inner wall of the outer packaging bottle, and abutting against the inner wall of the outer packaging bottle;
• and
• a pushing rod, arranged in the guiding tube and slidable along an axial direction of the guiding tube to enable the guiding tube to connect the anesthesia vaporizer with the outer packaging bottle or to block between the anesthesia vaporizer and the outer packaging bottle;
• wherein when gas inside the outer packaging bottle passes through the first end and enters an inner side of the convex ring, the gas expands the convex ring in a direction toward the inner wall of the outer packaging bottle.