Nested Helical Pipe Coupling for Radial Space Constraints
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Solution Overview
Problem
Existing coupling arrangements for helically corrugated metal pipes are complex and unsuitable for stable connections in spatially constrained locations, as they protrude radially and lack a secure fixed seat, making them difficult to integrate with further structural components.
Innovation Solution
A method involving cutting the pipe end along a screw thread, inserting a corrugated pipe piece with a helical contour, sliding a holding ring onto a connecting part, and using pressure elements to secure the holding ring against the pipe end, ensuring a stable and radially non-protruding connection by screwing the pipe piece into the pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a holding ring is screwed onto the end of a helically corrugated pipe with a complicated coupling body, then the connection can be made, but the coupling body projects far beyond the pipe in the radial direction and is not suitable for spatially tight assembly locations
Solution Approach 1:
The coupling body is nested inside the helically corrugated pipe, with the pipe piece inserted through the pipe and the holding ring securing it from the inside. This nesting arrangement ensures that the coupling body does not protrude radially beyond the pipe dimensions, solving the spatial constraint problem while maintaining mounting capability
Solution Approach 2:
The coupling arrangement is divided into separate functional segments: the pipe piece with external threading for insertion, the holding ring for securing, and the connection interface within the pipe. This segmentation allows each component to perform its function efficiently within the constrained radial space
2Area of stationary object
If a simple coupling arrangement is used for helically corrugated pipes, then the radial space is reduced, but the connection lacks a stable fixed seat for further structural components
Solution Approach 1:
The pipe end is pre-cut along the screw thread to create a precise end face that extends along the helical line. This preliminary action ensures that when the holding ring is pressed against the end face, it achieves optimal contact and stability, reinforcing the thread seat without requiring radial protrusion
Solution Approach 2:
The holding ring combines multiple functions: it secures the pipe piece axially, presses against the pre-cut end face to reinforce the thread seat, and provides a mounting surface for further structural components. This merging of functions achieves reliable connection stability within limited radial space
3Area of stationary object
If the pipe end is cut along the screw thread to create an end face extending along a helical line, then the contact surface area for the holding ring is maximized, but the cutting process becomes more complex
Solution Approach 1:
Instead of cutting the entire pipe end uniformly, only a localized region along the screw thread is cut to create the end face extending along the helical line. This local quality approach maximizes the contact surface area for the holding ring while minimizing the overall cutting complexity and material removal
Data Source
AI summary
A coupling arrangement has a coupling body and a helically shaped undulated metal pipe which has an end face extending along a screw thread of its undulation. A metal holding ring is mounted on the connecting part resting against the latter, where the outer diameter of the holding ring corresponds approximately to the outer diameter of the pipe, where the end face of the holding ring facing the pipe extends along a screw thread corresponding to the screw thread of the pipe, and where the holding ring is connected in the mounted position, fixedly to the connecting part by resting fixedly and tightly against the end face of the pipe.