Simple-supporting base screwing and anchoring type comb plate expansion and contraction device

The utility model discloses a simple-supporting base screwing and anchoring type comb plate expansion and contraction device. The expansion and contraction device comprises a fixed comb plate, a movable comb plate and water stop belts and is characterized in that the fixed comb plate and the movable comb plate are flat arranged on an anti-falling steel plate with comb teeth of the fixed comb plate crossing with comb teeth of the movable comb plate, the rear end of the movable comb plate and the rear end of the fixed comb plate are arranged on two anchoring bases respectively and fixedly connected with the anchoring bases through bolts, and the anti-falling steel plate is welded to the bottom surface of the comb tooth section of the movable comb plate and arranged on a sliding base in a sliding connection mode; the two anchoring bases are formed by welding multiple nut bases and anchoring vertical plates to steel angles or bottom plates; the water stop belts are fixedly arranged on one anchoring base and the two inner sides of the sliding base through steel clamping plates. Compared with the prior art, assembly check is completed in a plant, so that the onsite workload is reduced, installation quality is improved, the service life is prolonged, and onsite installation, onsite maintenance and onsite replacement are accelerated.