NMR Probe Direction Shifting Mechanism for Sample Tube Extraction
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Solution Overview
Problem
The existing methods for extracting a sample tube from an NMR probe are cumbersome and labor-intensive, especially for narrow bore probes, which require dismounting the probe and lack the necessary space for changing the sample tube's orientation, making the process time-consuming and inefficient.
Innovation Solution
A direction shifting mechanism with an arc shape is integrated between the sample tube supporting unit and the insertion port, allowing the sample tube to change orientation while maintaining contact with the inner wall, enabling extraction without the need for additional space or mechanisms, and a negative pressure system is used to suck the sample tube for safe and efficient transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the NMR probe is dismounted from the magnetic field generator to replace samples, then the sample tube can be replaced, but the operator bears a great load due to the heavy metal probe and the process becomes time-consuming and labor-intensive
Solution Approach 1:
The system separates the sample tube replacement function from the entire NMR probe disassembly. The extraction mechanism allows only the sample tube to be removed and replaced independently, while the probe remains installed in the magnetic field generator, eliminating the need to handle the heavy probe during routine sample changes.
Solution Approach 2:
The invention extracts the sample tube extraction function from the complex probe disassembly process. By providing a dedicated extraction mechanism that operates independently, the system removes the burden of handling the entire heavy probe structure during sample replacement operations.
2Ease of operation
If the sample tube is extracted through the bore from the magnetic field generator, then the sample tube can be replaced without dismounting the probe, but additional space is required for changing the orientation of the sample tube
Solution Approach 1:
The solution utilizes the vertical dimension along the bore axis to extract the sample tube, rather than requiring additional horizontal space for orientation changes. The sample tube is pulled vertically through the bore from its inclined position, eliminating the need for extra lateral space.
Solution Approach 2:
The invention extracts the sample tube directly through the existing bore opening without requiring additional space for orientation mechanisms. The extraction path utilizes the natural vertical access provided by the bore, simplifying the spatial requirements.
3Productivity
If gas is injected toward the sample tube to push it outward, then the sample tube can be extracted, but gas consumption increases and operational complexity increases
Solution Approach 1:
The invention replaces the pneumatic gas injection system with a mechanical extraction mechanism. A physical extraction tool or gripper directly engages and pulls the sample tube outward, eliminating the need for compressed gas and associated consumption and complexity.
Solution Approach 2:
The extraction mechanism is designed to engage the sample tube directly and extract it using mechanical force from the extraction device itself, without requiring intermediary gas pressure. The system performs the extraction function directly through mechanical means.
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 configuration minimizes the space required for sample tube extraction, allows for efficient and safe handling, and reduces the need for gas usage, thereby reducing operational complexity and gas consumption, while preventing damage to the sample tube.
Implementation Method 1
a negative pressure system is used to suck the sample tube for safe and efficient transfer
Data Source
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AI summary
A direction shifting mechanism (24) for changing a direction of a sample tube (28) is installed on a path of the sample tube (28) between a sample tube supporting unit (18) for supporting, during an NMR measurement, the sample tube (28) used for the NMR measurement and an insertion port (20) through which the sample tube (28) is inserted in and extracted from the sample tube supporting unit (18). The direction shifting mechanism (24) has a shape which partially includes a form of an arc, and the shape is designed to cause the sample tube (28) to change its direction in such a manner that the sample tube (28) is turned toward the insertion port (20) along the arc while being maintained in contact with at least two points on an inner wall of the direction shifting mechanism (24).