Static seal device of bipyramid rotary dryer

Abstract

The invention relates to a static seal device of a bipyramid rotary dryer, belonging to the technical field of pharmaceutical machinery. The static seal device comprises a cone tank body, wherein a vacuum hopper is arranged in the cone tank body; the opening of the vacuum hopper is connected with a first vacuum pipe; the outer end of the first vacuum pipe extends out of the tank body; a fixed gland and a tank body fixing teflon jacket are sleeved on the first vacuum pipe between the vacuum hopper and the tank body; the fixed gland is welded at the periphery of the first vacuum pipe and connected with the tank body fixing teflon jacket through a fixed bolt; one end of the first vacuum pipe which extends out of the tank body is arranged in a connection pipe in a penetrating manner; a seal connection piece is arranged between the first vacuum pipe and the connection pipe, and welded at the periphery of the first vacuum pipe; one end of the connection pipe is connected with a first flange, the other end of the connection pipe is connected with a second vacuum pipe through a mechanical seal; and the first flange is connected with the tank body through screws, and a bearing pedestal and a bracket are sleeved on the connection pipe between the first flange and the mechanical seal. The invention can prevent the generation of secondary pollution on materials, thereby improving the yield of products.

Description

technical field [0001] The invention relates to the technical field of pharmaceutical machinery, in particular to a sealing device of a double-cone rotary dryer. Background technique [0002] Because the cone of the double-cone rotary vacuum dryer is often polluted by foreign matter, which affects the production and the service life of the machine, in order to reduce the pollution to the material, the cone is packed with PTFE packing and a gland. After the machine has been running for a certain period of time, the PTFE powder worn down by the PTFE filler between the cone and the vacuum tube will seriously pollute the material, and the material will have to be returned to the pot, seriously affecting the production progress and product quality and yield. In normal production, the drying of pharmaceutical intermediates and finished products used to use a dryer with a dynamic sealing device, which often causes secondary pollution to the materials. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] Because there is often foreign matter pollution in the cone of the double-cone rotary vacuum dryer, which affects the production and the service life of the machine, in order to reduce the pollution to the material, PTFE packing and a gland are used to compress the cone.

After the machine runs for a certain period of time, the PTFE powder worn down by the PTFE filler between the cone and the vacuum tube pollutes the material very much, and the material has to be returned to the pot, which seriously affects the production progress and the quality and yield of the product.

In normal production, the drying of pharmaceutical intermediates and finished products used to use a dryer with a dynamic sealing device, which often causes secondary pollution to the materials

Images