The invention relates to a constant pressure device with gas impacting particles and multi-position force measurement changes, which can realize particle accumulation and densification under constant pressure, which includes an air compressor, a gas filter, a refrigeration dryer, a cylinder, and a gas flow Sensor, force sensor, adjustable pressure relief valve, outrigger, detachable bottom and air pressure sensor; among them, the air compressor is connected to the vertical air storage tank through the refrigeration dryer, the gas filter, and the vertical air storage tank is connected to the cylinder. The body is connected, the movable porous top plate can be put into the inside of the cylinder, and the upper end of the cylinder is connected with the upper sealing head in a sealed manner. The top of the upper sealing head is provided with an air inlet, and the vertical gas storage tank is connected to the air inlet through a pipe; one side of the cylinder is provided with a perspective window slightly smaller than the length of the cylinder and with its own scale; the lower end of the cylinder is provided with a leg, and the lower part of the cylinder is detachable and is provided with an adjustable pressure relief valve and a rotating ball valve air outlet. The device realizes the compact and dense accumulation of particles, eliminates the defect that the particle accumulation is not dense enough due to the insufficient air pressure inside the cylinder during the gas impact process, and can measure the changes in the internal force of the accumulated particles at multiple locations, and can complete fast and accurate particles. The accumulation and densification process and the accumulation and compaction structure are compact and uniform. Improving the process of particle accumulation and densification under the action of air impact will play a key role in the development of related particulate materials in the future.
