Plug type coring choke valve

The utility model relates to the technical field of exploration coring construction, in particular to a plug type coring choke valve which can solve the problem that impurities are mixed in obtained rock core samples due to the fact that a drilling tool directly drives a coring pipe for sampling to a certain extent. The plug type coring choked flow valve comprises a valve seat main body, a first through hole and a second through hole which are coaxially arranged in a penetrating mode are formed in the valve seat main body, and the size of the second through hole is smaller than that of the first through hole; the sealing piece is movably connected with the valve seat body, the size of the outer wall of the sealing piece is larger than that of the second through hole, and the size of the outer wall of the sealing piece is smaller than that of the first through hole. 本申请涉及勘查取芯施工技术领域，具体而言，涉及一种塞式取芯阻流阀，一定程度上可以解决钻具直接带动取芯管取样会导致取得的岩芯样品中混入杂质的问题。所述塞式取芯阻流阀包括：阀座主体，开设有同轴且贯穿设置的第一通孔和第二通孔，其中，第二通孔的尺寸小于所述第一通孔；密封件，与所述阀座主体活动连接，其