Applicator Loading Shaft with Segmented Flow Channels
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Solution Overview
Problem
The existing methods for filling the tank of an applicator, such as an atomizer, are inefficient, leading to residual old medium during color changes and incomplete cleaning, which affects the effectiveness of the medium application process.
Innovation Solution
A charging station with a loading shaft featuring a central loading channel, a return channel for recycling, and a flushing channel, along with a valve system that allows for different switching positions to manage the flow of medium, ensuring minimal residual old medium and thorough cleaning, is implemented. The loading shaft consists of a central tube, a middle tube, and an outer tube, with the valve system enabling precise control of medium flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tank is filled through the existing channel to the compressed air atomizer head, then the tank can be filled with medium, but residual old medium remains in the channel causing contamination during color changes
Solution Approach 1:
The charging shaft is divided into three concentric tubes (outer tube, middle tube, inner tube) creating separate channels for loading, returning, and flushing operations. This segmentation allows independent control of medium flow paths, enabling thorough cleaning by directing flushing medium through the annular gap between the inner and middle tubes while separate return flow occurs through the annular gap between the middle and outer tubes.
Solution Approach 2:
Instead of simply filling the tank forward through a single channel, the invention introduces a reverse flow path by positioning the distal end of the charging shaft close to the tank and creating a return channel that allows medium to flow back toward the charging station. This inversion of flow direction enables effective flushing and removal of residual old medium.
2Adaptability or versatility
If a single channel is used for filling, then the structure is simple, but the channel cannot be effectively cleaned or used for recycling medium
Solution Approach 1:
The charging shaft is divided into three concentric tubes (outer tube, middle tube, inner tube) creating separate channels for loading, returning, and flushing operations. This segmentation allows independent control of medium flow paths, enabling thorough cleaning by directing flushing medium through the annular gap between the inner and middle tubes while separate return flow occurs through the annular gap between the middle and outer tubes.
Solution Approach 2:
The charging shaft structure serves multiple functions simultaneously: the inner tube and its annular gap handle both loading and returning operations, while the outer tube and its annular gap provide flushing capability. The valve system at the proximal end controls these multiple functions, allowing the same structural elements to perform loading, returning, and cleaning operations as needed.
3Loss of substance
If the distal end of the charging shaft is positioned far from the tank, then the charging station structure is simpler, but the channels become long retaining more residual medium
Solution Approach 1:
The charging shaft employs a nested tube structure where the inner tube is positioned within the middle tube, which is positioned within the outer tube. This nesting arrangement allows multiple channels to coexist in a compact space, enabling the distal end to be positioned close to the tank without significantly increasing the overall structural footprint at the charging station.
Solution Approach 2:
Instead of extending channels linearly over long distances, the invention uses concentric annular gaps to create parallel flow paths in a radial dimension. This dimensional approach allows multiple functional channels to exist simultaneously with minimal axial length, reducing residual medium volume while maintaining structural compactness.
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 solution enables efficient filling and cleaning of the tank, minimizing residual old medium during color changes and ensuring effective medium application by utilizing the valve system to manage the flow of medium, thereby enhancing the applicator's performance and reducing overspray.
Implementation Method 1
If at least one channel is designed in a straight line, it can be passed through by a pig, which pushes out the medium present in the channel for recycling and cleans the channel.
Data Source
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AI summary
In order to load the heatable tank (3) of an applicator (1) with a medium, a loading station (2) is equipped with a loading shaft (17), which has at least one loading channel (23) and a return channel (24), wherein the head of the loading shaft (17) is designed as a valve (40) which is controlled by moving the loading tube (20) that receives the loading channel (23) relative to an additional tube comprising the loading tube.