Cistern Flushing Flow Choke with Conical Throttling Segments
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Solution Overview
Problem
Existing drain fittings for cisterns, particularly those with throttle elements, exhibit suboptimal flow behavior due to the shape of the throttle elements, which negatively affect flushing flow conditions.
Innovation Solution
A drain fitting with a valve body and a sealing element, featuring an adjustable throttle element composed of conical segment surfaces that can change its cross-sectional area, allowing for adjustable throttling of the flushing water flow, thereby improving flow behavior by directing the flow evenly against the throttle element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional throttling elements with circular sector-shaped flow segments are used, then the device structure is simple, but the flow behavior is suboptimal and flushing flow conditions are negatively affected
Solution Approach 1:
The patent applies curved conical surfaces instead of flat circular sector shapes for the throttling elements. The conical surface geometry creates optimized flow paths that improve flushing efficiency while maintaining a relatively simple structural form factor.
Solution Approach 2:
The patent employs multiple throttling elements with different opening angles and conical surface parameters. By varying these geometric parameters, the system optimizes flow distribution and flushing performance without requiring complex mechanical structures.
2Device complexity
If fixed throttle elements are used, then the device structure is simple, but the flushing volume cannot be adjusted to different requirements
Solution Approach 1:
The patent implements adjustable throttling elements that can be positioned at different angles and locations within the drain assembly. This dynamic configuration allows the flushing volume to be varied from approximately 2.3 to 1.7 liters per second while maintaining a relatively simple adjustment mechanism.
Solution Approach 2:
The throttling system is divided into multiple independent segments that can be individually adjusted. This segmentation allows for flexible control of flushing volume without requiring a completely complex reconfiguration mechanism.
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 conical design enhances flow behavior by evenly distributing the flushing water, allowing for adjustable throttling effects, optimizing the flushing volume from 2.3 to 1.7 liters per second based on the throttle element's position, and providing a compact, symmetrical arrangement.
Implementation Method 1
the conical shape distributes the flow evenly and directs it against the wall of the outlet opening
Data Source
Figure 1
Figure 2
Figure 3a~5c
AI summary
A flushing assembly (1) for a cistern comprises a valve body (2) with a sealing element (4) cooperating with a valve seat (3), wherein the valve body (2) with the sealing element (4) is movable from the valve seat (3) along a central axis (M) from a rest position to a flushing position and from the flushing position to the rest position, a valve housing (5) in which the valve body (2) is movably mounted, and a mounting unit (6) with a through-hole (7), wherein said valve seat (3) extends around the draining hole (7) and wherein, viewed in the installed position, the mounting unit (6) has a bearing section (8) above the valve seat (3) for mounting the valve housing (5). The flushing assembly (1) further comprises an adjustable throttle element (10) for adjustable throttle control of the flushing water flowing out through the draining hole (7).The throttling element (10) has at least one upper throttling segment (11) with a throttling surface (12) which has the shape of a segment of a lateral surface of a cone, and at least one lower throttling segment (13) with a throttling surface (14) which has the shape of a segment of a lateral surface of a cone, wherein the throttling segments (11, 13) are displaceable relative to each other, such that the cross-section of the throttling element (10) or of the discharge opening (7) is changeable.