Connecting joint structure used at position of comprehensive pipe rack cover plate

The utility model relates to the technical field of utility tunnel engineering, in particular to a connecting node structure for a utility tunnel cover plate, which comprises a cover plate, a support plate and a base, the cover plate is connected with a lock cover, the support plate is connected with a rotating shaft, the rotating shaft is connected with a gear, the base is connected with a baffle, and the base is provided with a slot; the device has the beneficial effects that when the device is used, the lock cover is firstly opened through a dismounting tool, then a rotary knob in a stepped groove is rotated, so that a rotating shaft rotates through a bearing, a gear rotates and drives the ends, away from a supporting plate, of two racks to move towards the inner side of a cover plate, and finally the two racks are pulled out of inserting grooves; the sliding blocks and the sliding grooves are in sliding connection, so that the moving process is more stable, finally, the cover plate is lifted upwards throu