Modular Hat Profile Sealing for Angled Sewer Inlet Connections
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Solution Overview
Problem
Existing systems for sealing and integrating the mouth area of inlet pipes into sewer pipes are complex, limited in depth and angle flexibility, and require a processed connection size of up to DN150, making them unsuitable for diverse pipe configurations and renovation depths.
Innovation Solution
A modular system comprising a commercially available hat profile, a cylindrical shut-off bladder, a U-shaped pressure bracket, and a clamping device allows for separate handling and adaptation to various pipe diameters, enabling sealing of inlet pipes at different angles and depths, with a pressure plate and foam layer for even contact pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a one-piece setting device with fixed collar and support ring is used, then the seal structure is integrated and stable, but the handling becomes very cumbersome and requires laborious coverage with fiberglass laminate
Solution Approach 1:
The setting device is divided into separate modular components: a hat profile, a collar, and a support ring. These components can be handled and installed separately, eliminating the need for laborious coverage with fiberglass laminate while maintaining structural stability when assembled.
2Device complexity
If the cap shaft is designed for shallow insertion of approximately 15 cm, then the system structure is simple, but inlet pipes entering at angles or as branches cannot be repaired
Solution Approach 1:
The support ring is designed with adjustable positioning capabilities, allowing it to be moved along the cap shaft and repositioned to accommodate different pipe entry angles and depths. This dynamic adjustment enables the system to handle inlet pipes entering at various angles and as branches, not just shallow perpendicular entries.
3Strength
If the fixed setting device requires machined connection size of up to DN150, then the seal structure is robust, but the system cannot adapt to diverse pipe diameters
Solution Approach 1:
The collar and support ring are designed with adjustable parameters, including variable positioning and adaptable connection sizes. This allows the system to accommodate diverse pipe diameters while maintaining robust sealing capability, replacing the fixed DN150 requirement with flexible dimensional adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system simplifies handling, adapts to diverse pipe diameters and angles, allows deeper insertion, and supports renovation of pipes from DN100 to DN200, including tangential and angled connections, with improved reliability and ease of use.
Implementation Method 1
a commercially available, essentially cylindrically designed shut-off bladder, which is introduced into the inlet line and can be fixed by expanding it, for example by means of compressed air
Implementation Method 2
an annular pressure plate and the associated pressure means are provided as separate components and are only assembled at the assembly site to form the system according to the invention
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a system for sealing and integrating the outlet area of an inlet pipe (2) opening into a walkable sewer pipe (1), comprising: - a hat profile (3) with a cylindrical hat shaft (30) intended for insertion into the inlet pipe (2) and a radially projecting rim (31) at the end of the hat shaft (30) extending from the inlet pipe (2), which is intended for bearing against the inside of the sewer pipe (1); - a temporarily expandable sealing bladder (4) intended for insertion into the inlet pipe (2), by means of which the hat shaft (30) can be pressed against the inside of the inlet pipe (2); - an annular flexible pressure plate (5) for bearing against the rim (31);and - pressure means for pressing the pressure shield (5) against the rim (31), wherein the pressure means comprise a substantially U-shaped pressure bracket (6) with two leg ends (60, 61) and a connecting leg (62), which overlaps the sealing bladder (4) in the area of the end (40) not pointing into the inlet line (2) and can be detachably placed with its leg ends (60, 61) on diametrically opposite areas of the pressure shield (5) and a clamping device acting on the connecting leg (62) is provided, by means of which a pressing force can be generated from the leg ends (60, 61) onto the pressure shield (5) in the direction of the rim (31).