The invention relates to the technical field of underground
coring devices, in particular to a locking jaw suspension type pressurized
coring device. The locking jaw suspension type pressurized
coring device comprises an
upper joint, a bearing base, an outer cylinder, a
drill bit, a casing, a flow separating joint, a locking jaw casing, a locking jaw, a guide casing, a limiting sleeve, a bearing joint, an inner cylinder and a
rock core jaw. The locking jaw suspension type pressurizing centering device has the advantages that the structure is reasonable and compact; after the coring is finished, the pressurizing is performed, the locking jaw is unlocked, the pressurizing sleeve, the guide sleeve, the limiting sleeve and a press sleeve continuously move down and push the bearing joint and the inner cylinder, the
rock core jaw mounted at the lower end of the inner cylinder is forced to retract and deform, and the purpose of pressurized coring is realized; finally, a pressure relief ball is thrown in, a pin on the pressure relief sleeve is sheared off, a pressure relief hole in the casing is exposed, and drilling liquid can smoothly circulate; the suspension is more reliable, the unlocking is convenient, and the pressure relief is smooth; by throwing the corresponding ball, the coring drilling, core
cutting and pressure relief are realized, so that the whole coring process is completed, and the construction is convenient and rapid.