Composite Wire Blood Bag Sterile Connection
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Solution Overview
Problem
Conventional blood bag tube connection devices using cutting blades result in high energy waste due to excessive heat, low utilization rate of cutting blades, and frequent blade replacement, leading to inefficient and unreliable connections.
Innovation Solution
A blood bag sterile connection method and device utilizing a composite metal wire for cutting and connecting blood bag tubes, which includes a wire box, vascular clamps, and a PLC controller, allowing for efficient heating and precise movement of the wire to minimize waste and improve material utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cutting blades are used to cut and connect blood bag tubes, then the cutting mode is simple and easy to realize, but the cutting blades carry excessive heat causing chemical changes and hot-melting of blood bag tubes, resulting in energy waste and unreliable connections
Solution Approach 1:
The patent changes the heating parameter control by using a heating wire with controlled resistance and current to generate precise heat, replacing the uncontrolled heat from cutting blades. The heating wire's parameters (resistance, length, diameter) are specifically designed to generate only the necessary heat for melting the blood bag tube material without excessive temperature rise.
Solution Approach 2:
The patent replaces the mechanical cutting blade system with an electrical heating wire system. Instead of using mechanical blades that generate excessive heat through friction and impact, an electrical heating wire is used to generate controlled thermal energy directly at the cutting point, eliminating the mechanical-to-thermal energy conversion inefficiency.
2Reliability
If conventional connection devices use cutting blades, then connections can be made, but the volume of the device must be large to guarantee sufficient heat, resulting in low utilization rate of cutting blades and serious waste of cutting material
Solution Approach 1:
The heating wire is designed as a disposable component that is replaced after a single use, similar to the cutting blade. However, the heating wire can be made from cheaper materials and manufactured more simply than precision cutting blades, reducing the waste problem while maintaining connection reliability.
Solution Approach 2:
The patent changes the material parameters from hard metal cutting blades to resistive heating wire material. This allows the use of simpler, cheaper materials that can be easily manufactured and disposed of after single use, eliminating the waste of expensive precision-cutting blades while maintaining sufficient heat generation capability.
3Productivity
If each cutting blade can only cut and connect blood bag tubes once, then connections are made, but the use demand on cutting blades is very large, requiring frequent replacement and resulting in low utilization rate
Solution Approach 1:
The heating wire is designed as a single-use disposable component that is as easy to replace as the cutting blade but can be made from simpler, cheaper materials. The wire is fed from a spool and automatically advanced, making replacement as simple as advancing the next section of wire, thereby reducing downtime and improving productivity.
Solution Approach 2:
The heating wire system is designed to be self-feeding from a spool, automatically advancing to the next section after each use without requiring manual intervention for replacement. This self-service mechanism reduces the time and effort required for blade/wire replacement, improving overall productivity.
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
The method and device achieve high material utilization and efficient sterile connections with reduced waste, improved operation reliability, and advanced user interface, addressing the inefficiencies of traditional cutting blade systems.
Implementation Method 1
electrifying a composite metal wire of the blood bag sterile connection device for heating
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention provides a blood bag sterile connection method and a device used in the method. The device includes a motor (12), a wire box (1), a PLC controller (11) and two vascular clamps (10). A left scroll (3-1) and a right scroll (3-2) are arranged in the wire box (1), wherein a composite metal wire (4) on the left scroll (3-1) is connected with the right scroll (3-2). The method includes the following steps: 1) placing blood bag tubes above the wire box (1), clamping positions to be cut by using the vascular clamps (10), and simultaneously moving the two vascular clamps (10) in opposite directions; 2) heating the composite metal wire (4), and cutting the blood bag tubes by using the composite metal wire (4); 3) after cutting the blood bag tubes, aligning the blood bag tubes to be connected; 4) moving the two vascular clamps (10) towards each other, rolling away the used composite metal wire (4), and rolling out a new composite metal wire (4); 5) connecting the blood bag tubes by heating the composite metal wire (4), and simultaneously moving the two vascular clamps (10) towards each other; and 6) returning the wire box (1) to the initial position, taking out the connected blood bag tubes, and returning the vascular clamps (10) to the initial positions.