Inner cavity radial sealing structure in corrugated pipe molding process

Abstract

The invention discloses an inner cavity radial sealing structure in the corrugated pipe molding process. The inner cavity radial sealing structure comprises two oppositely arranged end covers arranged at two end ports of a straight pipe, wherein the opposite faces of the two end covers are provided with axial annular grooves and annular sealing ring glands, and the sealing ring glands can axially move relative to the end covers. Adjusting washers and J-shaped sealing rings are sequentially installed in the axial annular grooves of the end covers, and the sealing ring glands are contacted with the J-shaped sealing rings. Before a corrugated pipe is formed, certain gaps are reserved between the end faces of the sealing ring glands and the end faces of the end covers, and outer walls of the end ports of the straight pipe inserted into the axial annular grooves of the end covers are matched with inner walls of the J-shaped sealing rings in a small-gap mode. During the corrugated pipe molding process, the sealing ring glands are subjected to the effect of external force to enable the inner walls of the J-shaped sealing rings to be tightly matched with the outer walls of the end ports of the straight and enable outer walls of the J-shaped sealing rings to be tightly matched with the inner walls of the axial annular grooves of the end covers. The straight barrel sealing and sealing structure dismantle can be quickly and conveniently performed by adopting the inner cavity radial sealing structure, and the straight barrel inner cavity sealing effect can be effectively guaranteed in the corrugated pipe molding process.

Description

technical field [0001] The invention relates to an inner cavity sealing structure of thin-walled sleeve parts, and more specifically, the invention relates to an inner cavity sealing structure in the forming process of bellows. Background technique [0002] Existing corrugated pipes are generally placed on a corrugated pipe forming device or forming machine for compression molding. In order to make the pressed bellows even and smooth, when pressing, generally inject liquid medium into the inner cavity of the straight cylinder, and maintain the pressure of the liquid medium in the inner cavity of the straight cylinder. In order to maintain the pressure of the liquid medium in the inner cavity of the straight cylinder, end caps are generally provided in the ports at both ends of the straight cylinder, and a sealing ring is arranged between the outer wall of the end cover and the inner wall of the straight cylinder. The sealing ring is closely matched with the outer wall of the...

AI Technical Summary

Problems solved by technology

This kind of sealing structure is simple and easy to implement, but there are deficiencies in the use process. First, the sealing ring is closely matched with the inner wall of the straight cylinder, and it is more troublesome to seal the straight cylinder and remove the sealing structure; second, during long-term use, due to repeated installation, the sealing The outer wall of the ring is repeatedly worn, which affects the cooperation between the outer wall of the sealing ring and the inner wall of the straight cylinder, thereby affecting the sealing of the inner cavity of the straight cylinder; the inner cavity of the straight cylinder is not tightly sealed, and the pressure of the liquid medium in the inner cavity of the straight cylinder cannot be maintained, which has a negative impact on the compression of the bellows

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