Switching mechanism of three-way reversing valve of heat accumulating type heating furnace

The utility model discloses a switching mechanism of a three-way reversing valve of a heat accumulating type heating furnace, which comprises a sealing body, a cylinder, a valve rod, a copper sleeve and a telescopic protective sleeve, the cylinder, the valve rod, the copper sleeve and the telescopic protective sleeve are coaxial with one another, the sealing body is fixed on a valve body of the three-way reversing valve, a through valve hole is arranged on the sealing body, the copper sleeve is coaxially fixed on the inner wall of the valve hole, and the telescopic protective sleeve is arranged in the valve hole. The valve rod penetrates through the copper sleeve and is in sliding connection with the copper sleeve, the air cylinder is fixed to the rear end of the sealing body, a piston rod of the air cylinder is connected with the rear end of the valve rod, the front end of the valve rod penetrates through the telescopic protective sleeve and then is connected with a valve disc of the three-way reversing valv