Variable-pressure type liquid dip dyeing pressurizing device

The utility model discloses a variable-pressure type liquid dip dyeing pressurizing device. A first piston and a second piston are arranged in a pressurizing cavity; a sealing chamber is formed between the first piston and the second piston, the miniature speed-regulating sucking pump is communicated with a sucking hole of the sealing chamber through a pipeline and is used for vacuumizing the sealing chamber, so that atmospheric pressure applies pressure to the first piston, and the second piston applies pressure to the upper surface of the slurry storage chamber through transmission; the pressure sensor is installed on the upper surface of the second piston and used for monitoring the air pressure change condition in the sealing chamber and feeding back the air pressure change condition to the computer for storage. The slurry storage chamber is fixed to the upper portion of the coal sample chamber, when the pressurizing cavity applies pressure to the upper surface of the slurry storage chamber and the two ro