Bottle type pressure container bottom strain supporting device for compressed natural gas (CNG) transport ship

The invention discloses a bottle type pressure container bottom strain supporting device for a compressed natural gas (CNG) transport ship and belongs to the field of shipborne supporting equipment of pressure containers. The bottle type pressure container bottom strain supporting device for the CNG transport ship structurally comprises a sliding limit structure between the bottom of a bottle type pressure container and a warehouse bottom board, and a supporting reset device for the limit mechanism, and is characterized in that the sliding limit structure is composed of a sphere flange limited at the bottom of the bottle type pressure container and a matched flange backing ring limited on the warehouse bottom board; the sphere flange achieves random strain reset of the bottle type pressure container through the supporting reset device formed by combining butterfly springs. Through the sliding limit structure between the bottom of the bottle type pressure container and the warehouse bottom board and the supporting reset device for the sliding limit structure, external load impact force compounded by vertical vibration, left-and-right swinging and front-and-back bump and applied on the bottle type pressure container is directly buffered and absorbed, and necessary preconditions are created for achieving CNG ship transportation under various complex sea conditions.