Displacement detection device for intelligent well lid

The utility model discloses a displacement detection device for an intelligent manhole cover, which comprises a floating cover, a fixed seat, a spring, a reed switch and a rubidium magnet, the fixed seat is cylindrical, and the top of the fixed seat is provided with a first central groove; a second central groove is formed in the bottom of the floating cover, and an annular groove is formed in thefloating cover around the second central groove; the annular top end of the first central groove is inserted into the annular groove; the top of the spring is connected with the bottom of the secondcentral groove, and the bottom of the spring is connected with the bottom of the first central groove; the reed switch is fixed on the outer groove wall of the first central groove; the rubidium magnet is fixed to the bottom of the outer groove wall, close to the reed switch, of the second center groove. When the spring is in a free state, the rubidium magnet and the reed switch are located at thesame height. Therefore, we