Special gas preparation device for air pressure type single-rod drive piston

Abstract

The invention provides a special gas preparation device for an air pressure type single-rod drive piston, and solves the technical problem of too small pressing force of container materials in the existing special gas preparation device. The device comprises an upwards opened container, wherein the opening of the container is covered by a sealing cover. The device is characterized in that the sealing cover is fixedly connected with a top cover; the top cover is provided with an inner cavity; a container cavity of the container and a top cover cavity of the top cover are respectively provided with a large piston and a small piston inside for moving up and down along cavity walls; the large piston and the small piston are connected with each other through a transmission rod; the transmission rod is arranged vertically, and can displace up and down; the small piston divides the top cover cavity into an upper cavity and a lower cavity; and the upper cavity is communicated with a pressure gas inlet. The device can provide larger material pressing force, and the pressing force can be adjusted, so that the pistons always follow the materials to compact the materials, displacement intervals are avoided, and guide rods are guaranteed to effectively control the up-down movement of the pistons, as a result, the pressing effect is improved, and the defects due to inclination of the pistons are avoided.

Description

technical field [0001] The invention relates to the technical field of a special gas preparation container, in particular to a special gas preparation device for a pneumatic single-rod driven piston. Background technique [0002] After the containers for preparing nitrogen, oxygen and other special gases are filled with granular materials, the materials need to be compacted from the top and dynamically eliminate the space for the materials to move down, such as nitrogen and oxygen generators, adsorption gas purification dryers etc., the gas is adsorbed and separated by the adsorbent in the container, such as the carbon molecular sieve in the tower body (container) of the pressure swing adsorption nitrogen generator preferentially adsorbs the oxygen molecules in the input air, so that the nitrogen molecules in the gas phase are enriched and produced nitrogen. In production, it is necessary to compact the granular adsorbent packed in the tower from the top. These equipments r...

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Problems solved by technology

During production, it is necessary to compact the granular adsorbent filled in the tower from the top. These equipments require a large compaction force, and the working pressure of the piston used to compact the material in the container is generally 0.4-0.8Mpa, that is, the piston is under pressure. The pressure is about 2800-5600kg. It is difficult for the commonly used spring compression structure to provide such a large working pressure, especially when the granular material moves down due to work (volume decreases and density increases), the piston needs to move down accordingly. In order to eliminate the space for materials to move down, avoid the pulverization of materials due to the collision between materials due to the existence of movement gaps, and lose the function of preparing special gases

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