Vertical centrifugal compressor cavity heat insulation device

The utility model discloses a vertical centrifugal compressor cavity heat insulation device which comprises a horizontal heat insulation layer (1) and a vertical heat insulation layer (2) which are arranged in a cavity (4), the horizontal heat insulation layer (1) is arranged on a motor flange (3), and the vertical heat insulation layer (2) is arranged on the inner wall of the cavity (4) to form acavity heat insulation barrier to separate the cavity (4) from the outside. And the horizontal heat insulation layer (1) is of a frame structure, so that the horizontal heat insulation layer (1) is uniformly laid on the motor flange (3). The vertical heat insulation layer (2) is of a frame structure, so that the vertical heat insulation layer (2) is tightly arranged on the inner wall of the cavity (4) in the circumferential direction. Heat is prevented from being transmitted to electrical equipment through the horizontal heat insulation layer and the vertical heat insulation layer, it is guaranteed that the electrica