Inline Pump Rear Attachable Syringe Field Serviceability
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Solution Overview
Problem
Conventional syringe pumps are expensive and difficult to repair, and users face challenges in changing the syringe volume or repairing pumps without external servicing, necessitating an improvement in syringe pump systems.
Innovation Solution
A syringe pump system with a linear actuator, shaft, and cylindrical syringe connector that allows for easy coupling and decoupling, featuring a T-slot configuration for aligning the plunger button and rod, threaded couplers for secure attachment, and guide stand-offs to prevent rotation, along with a micro-switch for detection, enabling field serviceability and interchangeability of syringes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If conventional syringe pumps are used, then pumping function is provided, but repair cost is high and repair difficulty is high
Solution Approach 1:
The syringe pump is divided into separable modules: a reusable pump body and replaceable syringe assemblies. The syringe assembly includes the syringe, plunger, and connector as an integrated unit that can be quickly exchanged without disassembling the pump mechanism, thereby reducing repair complexity and cost.
Solution Approach 2:
The pump body is designed with a universal connector interface that can accommodate different syringe types and volumes. This allows a single pump unit to perform multiple functions with different syringes, reducing the need for multiple specialized pumps and simplifying maintenance.
2Adaptability or versatility
If conventional syringe pumps are used, then pumping function is provided, but syringe changeover requires outside repair servicing
Solution Approach 1:
The connector interface incorporates a T-slot mechanism that allows dynamic adjustment and secure attachment of different syringe types. The T-slot geometry enables quick alignment and locking of syringes with different dimensions, facilitating field更换 without specialized servicing.
Solution Approach 2:
The connector acts as an intermediary element between the pump body and various syringe types. It provides a standardized interface that mediates the connection, allowing different syringes to be attached to the same pump without requiring modification to the pump itself.
3Adaptability or versatility
If syringe volume change is needed, then flexibility is improved, but assembly time increases
Solution Approach 1:
Syringes are pre-assembled with plungers and connectors as complete units before use. This preliminary assembly eliminates the need for field assembly of individual components, reducing the time required to change syringe volumes while maintaining flexibility in selection.
Solution Approach 2:
The syringe components are nested in a hierarchical structure where the plunger is inserted into the syringe barrel, and the connector is attached to the syringe end. This nested arrangement allows for compact storage and quick exchange as a single integrated unit.
4Manufacturing precision
If T-slot alignment mechanism is added, then plunger alignment precision is improved, but device complexity increases
Solution Approach 1:
The T-slot connector features an asymmetric geometry with a vertical slot and perpendicular flange. This asymmetric shape provides inherent alignment characteristics that guide the plunger into the correct position during insertion, achieving precise alignment through the connector's own geometry rather than additional alignment mechanisms.
Data Source
AI summary
Inline pumps with rear attachable syringes include a pump and a syringe with each designed so that the pump syringe system may be easily coupled and decoupled in the field. An end mount block on the pump has a slot shaped to accept a similarly shaped plunger button and plunger rod on the syringe. A user aligns the plunger button of the syringe next to the slot on the mount block of the pump, and slides the plunger button and rod into the inner cavity of the pump. Both the pump and the syringe have threaded couplers which securely couple the pump to the syringe by rotating the couplers with respect to each other.