The present application discloses a preheating and pressure-regulating device for alternating gas injection of
oil shale, which comprises: a shell, a supporting foot, an upper cover, an air outlet
pipe, a temperature sensor, an inlet
pipe, an electrically controlled valve, a flow sensor, a
pressure sensor, a control cabinet, an
impeller, a rotating shaft, an air outlet plate, a bearing, an inner gear ring, a through hole, an upper disc, a heat-conducting straight
pipe, a heat-conducting tooth, a cylindrical gear, an annular groove, an annular seat, a connecting block, a power supply plug, a fixed outer ring seat, a first flexible
rubber ring sheet, a second flexible
rubber ring sheet, a heating rod, a supporting seat, a
ball bearing, a fixed annular ring, an annular groove, a
cam, an annular conductive sheet, an annular slide groove, a fixed carrier sleeve, an annular carrier groove and an annular edge sheet. The benefit of the present application is that it is heated by a plurality of heating rods, and the heating rods are evenly installed at the bottom of the upper disc, so that the heating rods can rotate with the upper disc, thereby facilitating the heating of the gas inside the shell and improving the uniformity of heating.