Plunger Pump Detachable Pressure Sensor Design
Solution Overview
Problem
Existing plunger pump systems for high-pressure liquid feeding in HPLC or SFC face instability due to pressure fluctuations and require complex piping for pressure sensors, leading to increased internal capacity and high replacement costs when sensors fail.
Innovation Solution
A plunger pump design featuring a detachable pressure detection apparatus with a communication member that connects to the pump head without additional downstream piping, allowing for separate replacement of the pressure sensor and reducing installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pressure sensor is connected to the outlet of the pump head through piping, then the pressure detection function is achieved, but the installation work becomes complicated and the internal capacity downstream of the pump head increases
Solution Approach 1:
The pressure sensor is integrated directly into the pump head structure, merging the pressure detection function with the pump head itself. This eliminates the need for separate piping connections and reduces the internal capacity downstream of the pump head, while still achieving accurate pressure detection at the pump chamber outlet.
2Measurement precision
If the pressure sensor is connected through piping, then pressure detection is achieved, but the time required for replacing the liquid inside the system becomes longer
Solution Approach 1:
By integrating the pressure sensor into the pump head, the internal capacity downstream of the pump head is minimized. This reduces the volume of liquid that needs to be replaced during system maintenance, thereby decreasing the time required for liquid replacement operations.
3Device complexity
If the pressure sensor is integrated with the pump head, then piping complexity is reduced, but replacement of the pump head becomes necessary when the pressure sensor fails
Solution Approach 1:
The pressure sensor is designed as a separable component that can be detached from the pump head. This segmentation allows the pressure sensor to be replaced independently without replacing the entire pump head, while maintaining the integrated design benefits of reduced piping complexity and minimized internal capacity.
4Device complexity
If the pressure sensor is integrated with the pump head, then no additional piping is needed, but the cost of parts replacement becomes high when sensor fails
Solution Approach 1:
The pressure sensor is designed as a detachable module that can be separated from the pump head. This allows the inexpensive pressure sensor to be replaced independently, avoiding the high cost of replacing the entire pump head assembly, while maintaining the simplified piping configuration benefits of integration.
Data Source
AI summary
A plunger pump includes, independently of a pump head, a pressure detection apparatus independently having a sensor part for detecting a fluid pressure, and the pump head and the pressure detection apparatus are detachably mounted with a communication member sandwiched between them. Therefore, when the pressure detection apparatus fails, only the pressure detection apparatus can be replaced, and the pump head can be used as it is without replacement.