Angled Sample Loading Carousel for Analytical Furnaces
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Solution Overview
Problem
Existing sample loading mechanisms for analytical furnaces often expose crucibles to atmospheric gases during sample introduction, leading to contamination and complicating the loading process, especially when multiple samples need to be automatically introduced for analysis.
Innovation Solution
A sample handling carousel is mounted at an acute angle to a horizontal plane, featuring visible sample holding cavities and a removable design for easy loading, allowing samples to be added directly or at a remote location, with a tray for dropping samples into the furnace while minimizing exposure to contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a sample loading mechanism is used to introduce samples into a movable hopper that is subsequently sealed and purged with inert gas, then contamination from atmospheric gases is prevented, but the device complexity increases and the ease of operation decreases
Solution Approach 1:
The sample loading system is divided into separate functional components: a removable carousel assembly for sample storage, a fixed hopper for sample introduction, and a sealed connection interface. This segmentation allows the carousel to be easily removed and reloaded outside the furnace while maintaining the sealed protective environment during analysis, thus improving ease of operation without compromising contamination prevention.
Solution Approach 2:
A sealed connection interface acts as an intermediary between the removable carousel and the fixed hopper. This intermediary component allows samples to be transferred from the carousel to the hopper while maintaining the sealed environment, enabling easy reloading without direct atmospheric exposure and simplifying the overall loading operation.
2Productivity
If a horizontally extending sample holding carousel is positioned above the sample drop assembly, then multiple samples can be automatically introduced, but the operator requires a step stool or elevating means to load the carousel
Solution Approach 1:
Instead of positioning the carousel high above the furnace requiring operator elevation, the carousel is repositioned to a lower, more accessible location near the furnace opening. The sample drop mechanism is then designed to reach upward to retrieve samples from this lower carousel position, inverting the traditional arrangement and making the carousel easily loadable without step stools while maintaining automated sample introduction capability.
3Ease of operation
If the carousel is made transparent for visual inspection of samples, then operator convenience is improved, but the manufacturing precision and material selection become more constrained
Solution Approach 1:
The carousel is constructed with transparent panels only in the portions where sample visibility is needed, while other structural components use materials optimized for mechanical strength and thermal resistance. This local application of transparency allows visual inspection of samples without compromising the overall structural integrity or manufacturing precision of the entire carousel assembly.
Data Source
AI summary
An improved sample handling carousel is mounted to an analytical furnace at an acute angle and includes sample holding cavities which are readily visible at eye level to an operator. The rotary carousel can be easily removed from a stepwise driven drive shaft for filling the carousel at a remote location, such as a weighing station, or can be filled directly while mounted on the drive shaft. A tray is positioned below the carousel and has a slot for dropping a sample when one of the sample holding cavities aligns with the slot in the tray. In a preferred embodiment of the invention, the carousel is made of aluminum or a transparent polymeric material, such as acrylic.