Metering Pump Pressure Roller Release Mechanism
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Solution Overview
Problem
Existing metering pumps deliver fluids in a pulsating manner, leading to unreliable and variable dosages due to brief interruptions in fluid delivery and small rotation angles, making continuous and precise fluid delivery challenging.
Innovation Solution
A metering pump design featuring a pressure roller that moves along a hose from a starting point to an end point, with a release mechanism to ensure continuous fluid delivery and adjustable clamping forces to prevent backflow, using a deformable hose and a clamping device to manage pressure and fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotating body with pressure rollers is used to pump fluid, then fluid can be pumped reliably, but the delivery rate is not continuous and pulsates
Solution Approach 1:
The patent implements continuous fluid delivery by ensuring the pressure roller maintains constant contact with the hose throughout its rotation. The hose is guided in a groove that prevents disengagement, and the pressure roller's rotation axis is positioned such that it continuously compresses the hose, eliminating the pulsating delivery effect caused by periodic release of the hose.
2Productivity
If the angle of rotation per actuation is small, then fluid delivery is controlled, but the dosage amount per actuation varies
Solution Approach 1:
The patent incorporates a feedback mechanism where the rotational position of the pressure roller is monitored and used to control the actuation. The system detects when the pressure roller has completed a full rotation and uses this information to trigger the next actuation cycle, ensuring consistent dosage amounts regardless of variations in actuation speed or angle.
Solution Approach 2:
The pressure roller's rotation itself serves as the triggering mechanism for fluid delivery. As the pressure roller rotates and completes a full cycle, its position automatically determines when fluid should be dispensed, eliminating the need for external sensors or complex control systems while maintaining precise dosage consistency.
3Productivity
If a pressure roller presses against the hose to discharge fluid, then fluid delivery is achieved, but brief interruptions occur when the roller releases the hose
Solution Approach 1:
The patent ensures continuous fluid delivery by designing the pressure roller and hose arrangement so that the pressure roller never completely releases the hose during operation. The hose is guided in a groove that maintains engagement, and the pressure roller's rotation continuously compresses and releases the hose in a controlled manner, preventing brief interruptions in fluid delivery.
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 solution enables reproducible and continuous fluid delivery without pulsation, ensuring precise dosing and preventing fluid backflow, with adjustable settings for hose properties and fluid application angles, enhancing the metering pump's operational reliability and precision.
Implementation Method 1
the pressure roller presses against the hose with a pressure force, thereby discharging a fluid contained in the hose
Implementation Method 2
This hose is preferably deformable to allow pressure to build up within the hose between the pressure roller and the clamping device
Implementation Method 3
The hose can be designed to be elastic so that, when the pressure roller moves in the conveying direction, it returns to its original shape at the positions following the pressure roller
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
A metering pump (1) for dispensing a fluid (3) comprises a hose holder (31) for receiving a deformable hose (16) and a pressure roller (30). The pressure roller (30) is movable along a hose (16) received in the hose holder (31) in a conveying direction (25) from a starting point (23) to an end point (24) and against the conveying direction (25) from the end point (24) to at least the starting point (23). When moving in the conveying direction (25), the pressure roller (30) exerts a contact force on the hose (16). The metering pump (1) has a release mechanism that releases the contact force of the pressure roller (30) on the hose (16) when moving against the conveying direction (25).