Manhole Shaft Adapter Ring Horizontal Displacement Lock
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Solution Overview
Problem
Current sewer manhole structures with flat manhole necks face challenges in achieving horizontal displacement protection between the manhole neck and compensating rings, as the existing anti-displacement devices require complementary designs that are not easily achievable with standard manhole necks.
Innovation Solution
The introduction of an adapter ring with a bearing edge and alignment body that forms a horizontally non-displaceable stack arrangement between the manhole neck and compensating ring, using a flange ring and tubular sleeve configuration to ensure secure positioning without direct engagement, allowing for horizontal displacement lock independent of the manhole neck and compensating ring designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat end face manhole neck is used, then ease of manufacture is improved, but horizontal displacement protection between manhole neck and compensating ring deteriorates
Solution Approach 1:
The adapter ring serves as an intermediary component between the manhole neck and compensating ring. It includes an alignment body with upper and lower parts that engage with the compensating ring and manhole neck respectively, while a bearing edge radially outside the alignment body provides horizontal positioning. This mediator enables horizontal displacement protection without requiring modifications to the standard flat end face manhowe neck design.
2Reliability
If complementary stacking safety devices (projections and recesses) are provided on manhowe neck and compensating ring, then horizontal displacement protection is improved, but device complexity and difficulty of repair worsen
Solution Approach 1:
The adapter ring with its alignment body and bearing edge provides horizontal positioning without requiring complementary projections and recesses on the manhowe neck and compensating ring. This simplifies the overall device complexity while maintaining reliable horizontal displacement protection.
Solution Approach 2:
The adapter ring serves multiple functions: it provides horizontal alignment through the bearing edge, vertical positioning through the alignment body, and structural connection between the manhowe neck and compensating ring. This multi-functional component reduces the need for additional specialized displacement protection devices.
Data Source
Figure 1~2
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Figure 7~9
AI summary
Manhole structure (10) comprising a manhole neck (12) and an adjustment ring (15) for arrangement between the manhole neck and a manhole cover (17), wherein the manhole structure has an adapter ring (16) with a bearing edge and an alignment body (20) whose outer diameter is adapted to the inner diameter of the manhole neck or the adjustment ring in order to form a horizontally displacement-proof stacking arrangement between the manhole neck and the adjustment ring, wherein the alignment body has an upper part (21) for engagement with the adjustment ring and a lower part (23) for engagement with the manhole neck and the bearing edge is formed radially outside on the alignment body at the transition between the upper part and the lower part.