Equipment for accurately testing gas desorption amount in underground negative pressure coring environment through inflation linkage

The equipment comprises a moving frame, a coal sample filtering system, a coal sample tank, a negative pressure adjusting system and an inflation system, foldable storage rollers are mounted on the periphery of the bottom of the moving frame, and the coal sample tank, the negative pressure adjusting system and the inflation system are all arranged on the moving frame. A coal sample inlet of the coal sample filtering system is connected with the outer end of the drill rod, a coal sample outlet of the coal sample filtering system is connected with a coal sample inlet of the coal sample tank, a coal sample outlet of the coal sample tank is connected with a negative pressure suction port of the negative pressure injection system, and the coal sample tank is connected with a negative pressure generation chamber of the negative pressure adjusting system through a first gas pipeline. A negative pressure adjusting chamber of the negative pressure adjusting system is connected with the inflation system through a secon