Rotary Evaporator Ground Joint Snap Connector
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotary evaporators face issues with securing the ground joint between the evaporator flask and the vapor duct, particularly due to deviations in glassware diameters, leading to loose connections and potential slippage, which compromises the stability and safety of the setup.
Innovation Solution
A rotary evaporator with a safety device featuring a fastening section on the ground core side and a pivoting snap connector on the ground sleeve side, allowing for secure attachment independently of the flask's diameter, using a screw ring and snap connector design that can hold the evaporator flask in place with a positive fit, and includes a push-off mechanism for jammed situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a Keck clamp with web coupling is used to secure the ground joint, then the ground joint can be held together, but diameter deviations in glassware cause the snap connectors to widen and potentially slip off, compromising reliability
Solution Approach 1:
The clamp is divided into two independent snap connectors (first and second) that are not mechanically coupled through webs. Each snap connector independently engages with its respective component (ground core and ground sleeve), allowing each to adapt to diameter variations without affecting the other. This segmentation eliminates the problem where one connector's widening forces the other to widen as well.
Solution Approach 2:
The snap connectors are designed with elastic properties, allowing them to dynamically adapt to diameter deviations in the glassware. The elastic material enables each connector to deform and conform to the actual dimensions of the ground joint components, maintaining secure engagement even when diameters vary from expected values.
2Reliability
If the snap connector is designed to engage behind a flanged edge, then secure holding is achieved, but the connection becomes difficult to release when jammed
Solution Approach 1:
The snap connectors are designed with preliminary engagement features that secure the ground joint firmly during operation. The elastic material allows the connectors to deform during engagement and maintain constant contact pressure, ensuring secure holding. For release, the preliminary design includes the ability to overcome this engagement force through simple axial movement when needed.
Solution Approach 2:
The snap connectors utilize elastic material properties that allow parameter changes in their engagement force. During normal operation, the elastic deformation maintains high contact force for secure holding. When release is required, the force parameter can be changed by applying sufficient axial force to overcome the elastic retention, allowing easy disengagement even from jammed states.
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
The invention relates to a rotary evaporator with a device for securing a ground glass joint comprising a ground glass sleeve and a ground glass core between an evaporator flask and a vapor feedthrough, wherein the securing device has a fastening section on the ground glass core side and a snap connector pivotably mounted on the fastening section between a release position and a holding position in order to selectively release or hold the ground glass sleeve-side laboratory device.