Integrated Pump Valve Sampling Device for Contamination Control
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Solution Overview
Problem
Existing sampling devices using pinch valves face issues with sample contamination due to uncontrolled media flow and dead volumes, leading to unsafe states and compromised sample quality.
Innovation Solution
A sampling device with a pump integrated into the extraction line, which forms a media-tight closure in the idle state, reducing dead volumes and preventing sample mixing by controlling the flow path from the main line to the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If pinch valves are used to control sampling lines, then automated extraction can be achieved, but sample contamination occurs due to uncontrolled media flow and dead volumes
Solution Approach 1:
The invention removes the pinch valve from the sampling line and replaces it with a valve integrated into the pump unit. This extraction of the valve function from the flexible hose eliminates the dead volume problem and uncontrolled media flow, while maintaining automated extraction capability through the pump's integrated valve mechanism.
Solution Approach 2:
The pump unit serves as an intermediary device that combines both pumping and valve functions. By integrating the valve into the pump unit rather than using a separate pinch valve on the sampling line, the system achieves automated control while eliminating the harmful dead volume and preventing sample contamination.
2Ease of operation
If pinch valves are used for closing sampling lines, then automated control is possible, but unsafe states occur due to uncontrolled media flow
Solution Approach 1:
The invention merges the valve function with the pump unit into a single integrated component. This combination ensures that the valve is always in a known position relative to the pump, eliminating the unsafe states that occur with separate pinch valves where the valve position relative to the hose can become unpredictable during removal.
Solution Approach 2:
The pump unit is pre-positioned such that the valve is already in the correct location to control media flow before the sampling operation begins. This preliminary positioning ensures that the valve-hose relationship is predetermined and safe, preventing uncontrolled media flow during system operation and removal.
3Reliability
If separate clamps are used to close sampling lines before opening pinch valves, then contamination can be prevented, but device complexity increases
Solution Approach 1:
The invention combines the valve and pump functions into a single integrated unit, eliminating the need for separate clamps on the sampling line. The integrated valve in the pump unit provides sufficient control to prevent contamination without requiring additional clamping components, thereby reducing overall device complexity while maintaining sample integrity.
4Ease of operation
If pinch valves are removed after use, then tube system can be disassembled, but media flow becomes uncontrolled leading to sample mixing
Solution Approach 1:
The pump unit is designed with the valve integrated into it, creating a predetermined and safe valve-hose relationship before any operation begins. This preliminary design ensures that when the pump unit is removed from the hose, the valve remains in a known position that prevents uncontrolled media flow and sample mixing, while still allowing easy disassembly.
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
Ensures media-tight closure after sampling, preventing contamination and ensuring sample integrity by eliminating the need for pinch valves and minimizing dead volumes, thus maintaining sample quality.
Implementation Method 1
a pump for pumping medium to be removed from the main line into the container
Implementation Method 2
the pump forming a medium-tight closure of the removal line in the idle state
Data Source
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AI summary
The invention relates to an extraction device (104) for obtaining a sample of a medium to be extracted from a process stream, comprising: an extraction line (108), which can be connected or is connected to a main line (102) of a hose system (100), for conducting a medium to be extracted from the main line (102) into a container (110). According to the invention, a pump (120) is provided for pumping a medium to be extracted from the main line (102) into the container (110), said pump being arranged in the extraction line (104). The invention further relates to a method, to a hose system arrangement and to a use.