Flap Gate Rotation Bearing Simplifies Manufacturing
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Solution Overview
Problem
The manufacturing of flap gates requires high accuracy in cutting the door base and bearing stand, making the process complex and labor-intensive.
Innovation Solution
The use of an axis positioning mechanism that simplifies the placement of the pivot near the watertight rubber sheet, eliminating the need for precise cutting and allowing for a more straightforward manufacturing process by using a configuration of shafts, rotating plates, synchronizing rods, and connecting rods to position the pivot correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the curvatures of the door base and bearing stand are adjusted to locate the pivot near the watertight rubber sheet, then the watertight rubber sheet does not sag in the raised position, but the manufacturing process becomes complex and labor-intensive due to high accuracy cutting requirements
Solution Approach 1:
The invention divides the door base into a plate portion and a cylindrical portion that are separate components. The cylindrical portion is inserted into the plate portion, allowing the pivot position to be determined by the assembly relationship rather than requiring high-precision cutting of a single integrated piece. This segmentation enables easier manufacturing while maintaining the pivot near the watertight rubber sheet for reliability.
Solution Approach 2:
The cylindrical portion acts as an intermediary element between the plate portion and the bearing stand. By inserting the cylindrical portion into the plate portion, the system achieves the desired pivot positioning without requiring direct high-precision cutting between the door base and bearing stand. This intermediary component facilitates the assembly while maintaining watertightness.
2Manufacturing precision
If the pivot is positioned near the watertight rubber sheet to prevent sagging, then the door maintains proper sealing, but the door base and bearing stand require high-accuracy cutting which increases manufacturing complexity
Solution Approach 1:
By segmenting the door base into separate plate and cylindrical portions, the invention achieves precise pivot positioning through the assembly interface rather than requiring high-precision cutting of complex curved surfaces. This reduces manufacturing precision requirements while maintaining proper pivot placement near the watertight rubber sheet.
Solution Approach 2:
Instead of achieving pivot positioning through precise cutting of the door base curvature, the invention inverts the approach by using the insertion of the cylindrical portion into the plate portion to determine the pivot position. This reverses the conventional method and simplifies the manufacturing process.
Data Source
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AI summary
An axis positioning mechanism (21) serving as a rotation bearing of a flap gate includes a housing (24) disposed at the bottom of an opening, a first rotating plate (51) rotationally supported by the housing (24) via a first shaft (41), a second rotating plate (52) rotationally supported by the housing (24) via a second shaft having a different axis from the first shaft (41), and a synchronizing rod (60) rotationally connected to the rotating plates (51) and (52) so as to synchronize the rotations of the rotating plates. The axis positioning mechanism (21) further includes connecting members (71) to (73) rotationally connecting a door base (30) and the rotating plates (51) and (52) with different axes (91) to (93). The door (3) is laid flat with a pivot (20) at a higher position than the axes (91) to (93).