Offset Slot Pipe Coupling Prevents Tilting
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Solution Overview
Problem
Existing pipe couplings and clamps face issues with non-uniform bracing and high manufacturing costs, leading to inefficient sealing and complex structures, especially when dealing with defective pipes under high pressure.
Innovation Solution
A pipe coupling design featuring an outer clamp band with an offset inner longitudinal slot and a separate flat spanning element that prevents tilting, ensuring uniform bracing and easy assembly, along with a two-part configuration for reduced material usage and simplified mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inner longitudinal slot is located opposite the outer longitudinal slot in known pipe couplings, then the structure is simple and manufacturing is easy, but the free edges or inner longitudinal slot sides can tilt with the sealing insert during tensioning, causing non-uniform bracing
Solution Approach 1:
The patent applies asymmetry by offsetting the inner longitudinal slot from the outer longitudinal slot position. This asymmetric arrangement prevents the inner clamp band from tilting during tensioning, as the offset creates a geometric constraint that maintains uniform bracing across the sealing insert surface, eliminating the symmetry-induced tilting problem.
Solution Approach 2:
The patent introduces a flat spanning element as an intermediary component that bridges the inner longitudinal slot. This spanning element provides lateral support to the sealing insert, preventing tilting of the inner clamp band during tensioning, while still allowing the slot to be present for assembly purposes.
2Strength
If V-shaped support rings are used to laterally support the sealing insert, then some support is provided, but they cannot prevent tilting of the inner longitudinal slot sides during tensioning
Solution Approach 1:
The flat spanning element acts as an intermediary structural component that directly bridges and supports the inner longitudinal slot. Unlike the V-shaped support ring that only provides localized lateral support, the spanning element creates a rigid geometric constraint that prevents tilting of the entire inner clamp band during tensioning, ensuring reliable sealing.
Solution Approach 2:
The offset positioning of the inner longitudinal slot relative to the outer longitudinal slot creates an asymmetric geometric configuration that inherently prevents tilting. This asymmetric arrangement ensures that during tensioning, the forces are distributed uniformly across the sealing insert without causing rotational movement or tilting.
3Reliability
If two-part outer and inner clamp bands with offset slots and spanning elements are used, then uniform bracing and tight sealing are achieved, but the device complexity increases compared to one-part clamp bands
Solution Approach 1:
The patent applies segmentation by dividing the clamp band into outer and inner parts with separate longitudinal slots. This segmentation allows each part to be optimized independently - the outer clamp band for structural integrity and the inner clamp band with offset slot for uniform bracing - while still functioning as an integrated sealing system.
Solution Approach 2:
The asymmetric offset arrangement of the inner longitudinal slot relative to the outer longitudinal slot creates a geometric configuration that prevents tilting during tensioning. This asymmetric design, combined with the flat spanning element, ensures uniform bracing across the sealing insert, achieving reliable sealing while maintaining reasonable structural complexity.
4Force
If high clamping forces are applied to ensure sufficient bracing under high internal pressure, then the connection tightness is improved, but the required clamp band configuration becomes correspondingly solid and complex
Solution Approach 1:
The offset positioning of the inner longitudinal slot creates an asymmetric geometric configuration that prevents tilting of the clamp band during tensioning. This design allows the application of high clamping forces uniformly across the sealing insert without requiring excessive structural complexity, as the offset geometry inherently maintains bracing uniformity under load.
Solution Approach 2:
The flat spanning element serves as an intermediary structural component that distributes and reinforces the clamping force application. It provides additional lateral support that enables the system to handle high internal pressures with uniform bracing, reducing the need for overly complex clamp band configurations while maintaining the necessary clamping force.
Data Source
AI summary
A pipe coupling or a pipe clamp has an outer clamp band with an outer longitudinal slot, an inner clamp band with an inner longitudinal slot and a tensioning mechanism arranged on the outer clamp band. The inner longitudinal slot is offset in relation to the outer longitudinal slot. A separate flat spanning element is provided on the inner clamp band in order to span the inner longitudinal slot. The spanning element extends from one side of the inner longitudinal slot towards the other side of said longitudinal slot.