Dosing Mandrel Dynamics for Clogging-Resistant Mixing
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Solution Overview
Problem
Existing mixing installations for adding agents to water flows in animal stables are prone to clogging due to the presence of particles, leading to inadequate disinfection when agents contain dirt like sand, which can compromise sanitary standards.
Innovation Solution
A mixing installation with a dosing assembly featuring a venturi arrangement and a dosing device with a reciprocally slidable dosing mandrel that forms a ring-shaped dosing channel, allowing easy release and removal of accumulated dirt by shifting to a retracted position, ensuring accurate agent dosage and preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a choke pipe is used for dosing agent, then the dosage can be set, but the choke pipe becomes clogged when particles are present in the agent
Solution Approach 1:
The dosing mandrel is made movable along the agent passage, allowing it to switch between a dosing position (where it defines a ring-shaped dosing channel for precise dosage) and a retracted release position (where it clears accumulated particles). This dynamic adjustment resolves the contradiction by enabling both precise dosage control and clogging prevention through position changes.
Solution Approach 2:
The system performs preliminary clearing action by allowing the dosing mandrel to be retracted before particles cause complete blockage. The movable design enables periodic removal of accumulated particles from the agent passage, preventing clogging before it affects dosage accuracy or system operation.
2Measurement precision
If the dosing device has a ring-shaped dosing channel with constant radial flow height, then dosage accuracy is improved, but dirt accumulation in front of the dosing channel increases clogging risk
Solution Approach 1:
The dosing mandrel's ability to move along the agent passage allows it to periodically retract from the ring-shaped dosing channel position. This dynamic movement enables clearance of dirt accumulation that occurs in front of the precisely-defined dosing channel, resolving the contradiction between maintaining accurate dosage geometry and preventing particle buildup.
3Reliability
If the dosing mandrel is made movable for clearing particles, then clogging is prevented, but the device complexity increases
Solution Approach 1:
The movable dosing mandrel can be retracted to allow high-pressure liquid flow to automatically flush out accumulated particles from the agent passage. This self-cleaning mechanism reduces the need for manual intervention or additional complex clearing mechanisms, resolving the contradiction between improved reliability and device complexity.
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
Ensures consistent and accurate agent dosage by allowing easy removal of dirt accumulation, maintaining effective disinfection performance even in environments with particle contamination.
Implementation Method 1
The venturi causes an under pressure that draws the agent from an agent container into the passing water flow
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The invention relates to a mixing installation for mixing a first agent to a liquid, wherein the mixing installation comprises a dosing assembly and a first agent supply conduit, wherein the dosing assembly comprises a venturi arrangement and a first dosing device between the first agent supply conduit and the venturi arrangement, wherein the first dosing device comprises a first agent passage and a first dosing mandrel having a first dosing pin that extends in the first agent passage, wherein the first dosing mandrel is axially slidable with between a dosing position in which the first dosing pin extends inside the first agent passage to define a first ring shaped dosing channel around the first dosing pin, and a retracted position in which the first ring shaped dosing channel is cancelled.