Bag stretching device in vertical type centrifuge

Abstract

The invention discloses a bag stretching device in a vertical type centrifuge. The bag stretching is capable of significantly reducing the manufacturing cost and the processing difficulty. The bag stretching bag includes a main shaft, a rotary drum, a bag stretching air cylinder and a driving wheel arranged at the lower end of the main shaft. The rotary drum is fixed to the main shaft through a rotary drum head, and a liquid blocking plate of the upper end of the rotary drum is provided with an upper bag mouth fixing mechanism. The bag stretching air cylinder includes a cylinder body which isformed by a cylinder barrel and upper and lower end covers. A piston is arranged in the cylinder body, the cylinder body is divided into upper and lower air chambers by the piston, and a piston rod isarranged on the piston. A bag stretching bracket is arranged at the lower end of the cylinder barrel, and a lower bag mouth fixing mechanism is arranged at the lower end of the bag stretching bracket. Air pipe holes are formed in the main shaft, the driving wheel and the piston rod. Double layer air pipes and upper and lower rotary sealing mechanisms are arranged in the air pipe holes, and the double layer air pipes are used for being connected with the upper and the lower air chambers. Air interfaces are arranged at the lower ends of the double layer air pipes, and the air interfaces communicate with an outer air source. The bag stretching device can be widely used in the discharging centrifuge.

Description

technical field [0001] The invention relates to a vertical centrifuge, in particular to a bag stretching device in the vertical centrifuge. Background technique [0002] At present, the Chinese patent document with the authorized announcement number CN101780439B discloses a discharge device in a centrifuge (equivalent to the stretching bag device in the present invention). For the filter bag in the drum, there is also a filter pull ring in the drum, and at least a pair of stretching arms are arranged at the lower end of the filter pull ring. The upper end protrudes from the main shaft and connects with the support of the filter pull ring, the upper bag opening of the filter bag is fixed on the drum, and the lower bag opening of the filter bag is connected with the stretching arm; the main shaft is equipped with a pull rod driving device , the specific setting method of the pull rod driving device is as follows: a sealed piston chamber is arranged in the main shaft, a piston...

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Problems solved by technology

The unloading device of the above structure leads to a very complicated structure of the whole centrifuge, which greatly increases the difficulty of processing and increases the manufacturing cost

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