Purification tank

The utility model discloses a purification tank which comprises a tank body, an inner supporting shaft sleeve is arranged in the tank body in the radial direction of the tank body, a shaft hole is formed in the inner supporting shaft sleeve, the shaft hole penetrates through the two axial ends of the inner supporting shaft sleeve and is communicated with the outside, the hole circumferential edge of the shaft hole is connected with the side wall of the tank body in a sealed mode, and a supporting shaft is arranged in the shaft hole. The two axial ends of the supporting shaft protrude out of the outer side wall of the tank body to form protruding sections, and the outer diameter of the supporting shaft is smaller than the aperture of the shaft hole. The number of the inner supporting shaft sleeves is at least two, the inner supporting shaft sleeves are arranged at the two ends of the tank body, and the inner supporting shaft sleeves are located at the same horizontal height. Compared with the prior art, by arr