Curved Deflection Surface for Downpipe Branch Section
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Solution Overview
Problem
Existing line branch pieces for downpipes in multi-story buildings face challenges with increased drainage performance requirements and head height, leading to negative pressure issues that can cause wastewater to be sucked out of siphons, necessitating larger pipe diameters which increase installation space and reduce performance.
Innovation Solution
A line branch piece design featuring a curved deflection surface that bundles wastewater into a jet and guides it tangentially onto the wall, combined with a flow divider and ventilation passage to manage pressure differences, allowing for efficient wastewater flow without increasing pipe diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If braking elements or guide elements are arranged to reduce negative pressure, then negative pressure formation is reduced, but the performance or volume flow of the branch line decreases
Solution Approach 1:
The patent employs curved guide surfaces and a curved flow path within the deflection section to smoothly redirect wastewater. The curved geometry eliminates abrupt flow direction changes that would create turbulence and negative pressure, while maintaining flow velocity and volume through continuous, streamlined guidance of the wastewater stream.
Solution Approach 2:
The invention introduces a three-dimensional deflection section with complex spatial flow paths that guide wastewater from the vertical downpipe through curved trajectories into horizontal or angled branch lines. This multi-dimensional flow management allows smooth pressure transitions while preserving flow momentum and volume.
2Productivity
If larger pipe diameters are used to maintain performance, then volume flow is maintained, but installation space increases
Solution Approach 1:
The patent optimizes the geometric parameters of the deflection section, including the curvature radius, flow path length, and surface angles, to minimize flow resistance and energy losses during direction change. These parameter optimizations allow the system to maintain high volume flow efficiency within a compact diameter, reducing the required pipe size and installation space.
3Productivity
If the deflection section is designed to bundle wastewater into a jet, then deceleration is reduced, but the structural complexity increases
Solution Approach 1:
The deflection section integrates multiple functions into a single unified structure: it guides flow direction, bundles wastewater into a coherent jet, and manages pressure transitions simultaneously. This merging of functions into one compact component achieves the desired flow control while minimizing overall structural complexity.
Solution Approach 2:
The curved guide surfaces are designed to automatically bundle and direct the wastewater flow through the jet formation effect, utilizing the flow's own momentum and coherence to achieve streamlined guidance without requiring additional active control mechanisms or complex adjustable components.
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
This design enhances performance by reducing deceleration of wastewater, maintaining or reducing pipe diameter while maintaining volume flow, and preventing negative pressure, ensuring siphons function effectively and installation space is minimized.
Implementation Method 1
The curved deflection surface 10 preferably has the shape of a channel 24 which extends along the flow curve or flow line M. The channel bundles the wastewater into the jet S in question and then guides it tangentially onto the wall 11 of the flow area 12.
Implementation Method 2
a ventilation passage 16 is arranged between the flow area 12 and the supply section 7, via which pressure differences between the flow area 12 and the mouth area 13 can be compensated for
Implementation Method 3
a flow divider 18 is arranged in front of the deflection section 4, viewed in the direction of fall F, with the wastewater jacket W being able to be torn open with the flow divider 18. The flow divider 18 preferably diverts the wastewater directly to the deflection section 4.
Data Source
Figure 1
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Figure 3
AI summary
The branch line section (1) has deflection section (4) adjoining with the lower down pipe section (5) having an outlet opening (6). The deflecting section has curved deflection area with partially curved deflecting surface extending to the flow line for pooling the waste water. The flow line is extended with respect to the falling direction at a first angle and with respect to a plane at second angle, so that the curved deflection surface with its flow line is directed tangentially to the wall (11) of the flow region.