Two-way twin-axial connector module of a receptacle for transporting liquefied gas and liquefied gas transport system including the same

A two-way twin-axial connector module of a receptacle for transporting liquefied gas, comprising:

• a male connector connected to an end portion of a transferring pipe incorporating a first supply line for supplying the liquefied gas and a first return line for retrieving the vaporized gas, including a pair of male bayonets formed to protrude and surround protruding portions of the first supply line and the first return line, respectively, which are formed to protrude outward through the end portion of the transferring pipe;
• and
• a female connector incorporating a second supply line for supplying the liquefied gas and a second return line for retrieving the vaporized gas, to be connected to a supply source for supplying the liquefied gas or a storage tank for storing the liquefied gas, including a pair of female bayonets concavely formed and connecting with the second supply line and the second return line, respectively,
• wherein the male connector includes:
• a male connector body having one end portion formed in a closed hollow pipe shape, connected to the end portion of the transferring pipe, accommodating at least a portion of the first supply line and the first return line therein;
• and
• the pair of male bayonets formed to surround the protruding portions of the first supply line and the first return line, respectively, which are formed to protrude outward through one end of the male connector body;
• the female connector includes:
• a connecting housing formed to protrude from an outer side surface of the supply source or the storage tank in a circular ring shape to surround at least a portion of the male connector body;
• a pair of female bayonets formed inside the connecting housing at a position corresponding to the pair of male bayonets, being concavely formed in a shape corresponding to a shape of the pair of male bayonets so that the pair of male bayonets can be inserted thereinto;
• and
• a cylinder valve unit installed at an end portion of the pair of female bayonets so as to be incorporated inside the supply source or the storage tank, elastically moving forward and backward by contact with the pair of male bayonets which are inserted into the pair of female bayonets, and selectively connecting the first supply line and the first return line on the pair of male bayonets and the second supply line and the second return line on the pair of female bayonets;
• the male connector body includes a pair of male bosses formed to protrude in a boss shape to surround at least a portion of the pair of male bayonets;
• the connecting housing includes a pair of female bosses formed to protrude from an entrance portion of the pair of female bayonets in a boss shape having a diameter larger than the pair of male bosses so as to accommodate the pair of male bosses;
• and the cylinder valve unit includes:
• a valve body installed inside the supply source or the storage tank, forming a connecting chamber in which the liquefied gas or the vaporized gas can selectively flow and a connecting channel formed to have a smaller cross-sectional area than the connecting chamber to connect the connecting chamber and the second supply line or the second return line;
• a movable valve body having one end formed in an opened hollow pipe shape, including at least one connecting hole capable of penetrating an outer side surface to be connected with an internal space so as to move forward and backward in the connecting chamber of the valve body;
• a fixed valve body installed on one side of the connecting chamber, including:
• a first accommodating groove for accommodating at least a portion of the pair of male bayonets on one side;
• a second accommodating groove for accommodating at least a portion of the movable valve body on the other side opposite thereto;
• and a penetrating hole for connecting between the first accommodating groove formed on one side and the second accommodating groove formed on the other side;
• an elastic member installed on the other side of the connecting chamber to elastically press forward the movable valve body in a direction toward the first accommodating groove;
• and
• a nipple installed at an entrance portion of the connecting channel to accommodate and support at least a portion of the elastic member.

A liquefied gas transport system, comprising:

• a hydrogen liquefier for cooling hydrogen to liquefaction temperature or less to produce liquefied hydrogen;
• a storage tank for storing the liquefied hydrogen;
• a transferring pipe incorporating a pair of a supply line and a return line to connect the hydrogen liquefier and the storage tank, the supply line supplying liquefied hydrogen from the hydrogen liquefier to the storage tank and the return line retrieving the vaporized gas from the storage tank to the hydrogen liquefier so that the vaporized gas generated in the storage tank can be re-liquefied in the hydrogen liquefier;
• and
• a two-way twin-axial connector module installed at a connecting portion between the hydrogen liquefier and the transferring pipe and a connecting portion between the storage tank and the transferring pipe so that the hydrogen liquefier and the transferring pipe and the storage tank and the transferring pipe can be connected;
• wherein the two-way twin-axial connector module includes:
• a male connector connected to an end portion of the transferring pipe incorporating a first supply line for supplying liquefied gas and a first return line for retrieving the vaporized gas, including a pair of male bayonets formed to protrude and surround protruding portions of the first supply line and the first return line, respectively, which are formed to protrude outward through the end portion of the transferring pipe;
• and
• a female connector incorporating a second supply line for supplying liquefied gas and a second return line for retrieving the vaporized gas, to be connected to the hydrogen liquefier or the storage tank, including a pair of female bayonets concavely formed and connecting with the second supply line and the second return line, respectively, and
• wherein the female connector is equipped with a cylinder valve unit installed at an end portion of the pair of female bayonets so that the cylinder valve unit can elastically move forward and backward by contact with the pair of male bayonets, so as to selectively connect the first supply line and the first return line on the pair of male bayonets and the second supply line and the second return line on the pair of female bayonets according to the forward and backward movement of the cylinder valve unit.