Coring assembly for extraterrestrial drilling and preparation method thereof

A coring assembly for extraterrestrial drilling, comprising:

• a limit locking mechanism, a flexible coring rotary body, a variable-diameter cone, an equal-tension bundled rope, and an end cap;
• wherein one end of the flexible coring rotary body is connected to the limit locking mechanism, and the other end of the flexible coring rotary body is connected to one end of the variable-diameter cone;
• the flexible coring rotary body and the variable-diameter cone form a flexible coring structure;
• a storage structure is connected within the variable-diameter cone;
• and the other end of the variable-diameter cone is connected to the end cap via the equal-tension bundled rope;
• the limit locking mechanism includes:
• a limit cylinder, two breakaway cables, a locking ring spring, and a carbon fiber rope;
• wherein a side wall of the one end of the flexible coring rotary body is connected to one side of the locking ring spring, and the other side of the locking ring spring is slidably connected to an inner wall of the limit cylinder;
• one end of the locking ring spring is connected to one end of one of the two breakaway cables via the carbon fiber rope, and one end of the other of the two breakaway cables is connected to the other end of the locking ring spring;
• and the inner wall of the limit cylinder is connected to the one end of the flexible coring rotary body to guide flipping of the flexible coring rotary body and to provide structural reinforcement to the flexible coring rotary body;
• the limit cylinder and the flexible coring rotary body are made of a same material;
• the other end of each of the two breakaway cables extends beyond a side wall of the limit cylinder;
• the limit cylinder is made of a hollow fabric;
• the flexible coring rotary body and the variable-diameter cone are each a hollow fabric woven using a shuttleless loom or a shuttle loom;
• wherein a diameter of the one end of the variable-diameter cone is 25 mm, and a diameter of the other end of the variable-diameter cone is 15 mm;
• a warp yarn of the hollow fabric is composed of one or two of an ultra-high molecular weight polyethylene fiber, an aramid fiber, a PBO fiber, a PBOH fiber, a PIPD fiber, an aramid ester fiber, or a polyimide fiber, which are modified for resistance to space irradiation;
• a weft yarn of the hollow fabric is composed of one or two of the ultra-high molecular weight polyethylene fiber, the aramid fiber, the PBO fiber, the PBOH fiber, the PIPD fiber, the aramid ester fiber, the polyimide fiber, a metal fiber, a ceramic fiber, or a glass fiber, which are modified for resistance to space irradiation;
• the storage structure within the variable-diameter cone contacts a surface of a celestial body and is inserted into and engaged with the surface of the celestial body;
• and
• the storage structure includes a plurality of partition plates made of the hollow fabric;
• wherein side walls of the plurality of partition plates are connected to an inner wall of a cavity of the variable-diameter cone to divide the cavity into eight equal parts.