Modular comb plate expansion device

The utility model belongs to the technical field of expansion devices, and discloses a modular comb plate expansion device. The modular comb plate expansion device is mainly and technically characterized by comprising side beam deformed steels, middle beam deformed steels, side beam comb plates and middle beam comb plates, waterproof rubber strips and plate springs are arranged between each side beam deformed steel and the corresponding middle beam deformed steel and between two adjacent middle beam deformed steels respectively, displacement control boxes with beams are arranged at the bottoms of the side beam deformed steels, compressing supports and pressure-bearing supports are arranged on the upper surfaces and the lower surfaces of the beams in the displacement control boxes respectively, limiting supports are arranged on the side surfaces of the beams in the displacement control boxes, brackets are arranged at the bottoms of the middle beam deformed steels, the beams penetrate the brackets, and compress