Sleeve check valve

The utility model discloses a sleeve check valve, which comprises the following components: a valve body, both ends are equipped with the feed inlet and the discharge gate of UNICOM's cavity respectively about the valve body, the cavity middle part is equipped with the disk seat, install guide sleeve on the valve body directly over the disk seat, guide sleeve stretches into in the cavity of valve body, the valve gap is installed to the valve body upper end, slidable mounting stretches into the interior valve rod of sleeve in the valve gap, valve rod upper portion is still overlapped and is equipped with the hold down grid, hold down grid and valve gap upper end facial features are fixed, the valve gap and the interior from bottom to up of the toroidal cavity between the valve rod of hold down grid below are equipped with the filler liner in proper order, pack, gland, gland withstands the upper end the hold down grid, the middle part of filler still is equipped with the isolation layer, the disk seat is annular barrel. The utility model discloses a multiple seal structure can effectively guarantee the sealing performance between valve rod and the valve gap, and bell mouth and the relative hole that constitutes of lower bell mouth awl end are gone up in cooperation simultaneously for when driving the valve fluid medium switch on overflow fast.