Dissolution Vessel Verticality Control via Flange and Ring
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Solution Overview
Problem
Existing dissolution testing apparatuses face challenges in ensuring the verticality and concentric alignment of vessels, which affects the precision of instrument insertion and measurement accuracy, particularly when instruments like shafts and paddles need to be aligned vertically within the vessels.
Innovation Solution
The design incorporates a cylindrical section with a flange and ring structure that ensures the vessel is precisely vertical and concentric when mounted, using a bottom surface and annular shoulder to maintain alignment and centering, allowing the inside vessel surface to be parallel with the instrument axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional vessel mounting methods are used, then the vessel can be installed in the dissolution testing apparatus, but the verticality and concentric alignment of the vessel cannot be ensured, affecting instrument insertion precision and measurement accuracy
Solution Approach 1:
The vessel is divided into distinct functional segments: a mounting flange for attachment to the apparatus, a cylindrical body for containing dissolution media, and a bottom section for support. This segmentation allows each part to be optimized for its specific function, with the flange providing mounting surfaces and the cylindrical body maintaining vertical alignment.
Solution Approach 2:
The vessel incorporates pre-formed alignment features (flat bottom surface, annular shoulder, and concentric cylindrical surfaces) that are manufactured into the vessel structure beforehand. These features automatically establish verticality and concentricity when the vessel is mounted, eliminating the need for post-installation adjustment or complex external alignment mechanisms.
2Measurement precision
If the vessel is not accurately vertical, then the inside surface of the vessel will not be precisely parallel with the shaft-based instrument, but adding verticality control mechanisms increases device complexity
Solution Approach 1:
The vessel structure itself provides the verticality control function through its geometric features. The flat bottom surface rests on the mounting surface, the annular shoulder locates the vessel radially, and the cylindrical body maintains concentricity. The vessel serves both as the containment vessel and as its own alignment mechanism, eliminating separate verticality control devices.
Solution Approach 2:
The alignment problem is solved by transitioning from point-based or line-based alignment to surface-based alignment. The flat bottom surface provides a stable base, the annular shoulder provides radial location, and the cylindrical body provides continuous concentric guidance along the vertical dimension, creating a three-dimensional alignment system.
Data Source
AI summary
A vessel includes a cylindrical section coaxially disposed about a central axis of the vessel. The cylindrical section includes an inside vessel surface, an outside vessel surface opposing the inside vessel surface, an upper end region circumscribing a vessel opening, and a lower end region axially spaced from the upper end region. A bottom section is disposed at the lower end region. A flange is coaxially disposed about the central axis and extends radially outward from the outside vessel surface at the upper end region. The flange includes a bottom surface facing generally toward the lower end region and perpendicular to the inside vessel surface. A ring may be coaxially disposed about the central axis and provide the bottom surface. An annular shoulder may protrude from the outside vessel surface, and may be spaced from or integrally adjoined to the flange.