Dense-Phase Powder Pump Valves for Uniform Single-Chamber Feeding
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Solution Overview
Problem
Dense phase powder pumps used for conveying coating powder face issues with continuous powder feeding and require frequent maintenance, especially with certain types of powders, and are limited by the need for multiple chambers to achieve consistent conveyance.
Innovation Solution
A single-chamber dense phase powder pump with oversized powder inlet and outlet valves, each having an effective flow cross section of at least 35% of the conveying chamber, to ensure continuous and consistent powder conveyance with reduced maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple powder conveying chambers are used to ensure continuous powder conveyance, then the reliability of continuous powder feeding is improved, but the device complexity and number of structural components increase
Solution Approach 1:
The patent applies segmentation by dividing the powder conveyance system into multiple independently operable chambers that can work in parallel. Each chamber has its own inlet valve, outlet valve, and conveying mechanism, allowing continuous operation through coordinated activation of multiple segments rather than relying on a single complex chamber system.
2Ease of operation
If mechanically operated pinch valves are used to control powder flow, then the ease of operation is improved, but the reliability of continuous feeding deteriorates due to frequent maintenance and clogging
Solution Approach 1:
The patent applies parameter changes by modifying the operational parameters of the pinch valves, specifically controlling the opening duration and timing more precisely. The system adjusts the valve opening parameters to optimize powder flow, reducing clogging and maintenance requirements while maintaining ease of mechanical operation. This involves optimizing the temporal and spatial parameters of valve actuation across multiple chambers.
3Productivity
If the valve flow cross section is made large to improve response time, then the productivity is improved, but the device complexity increases due to larger structural components
Solution Approach 1:
The patent applies dimensionality change by transitioning from a single large valve to multiple smaller valves arranged in parallel across multiple chambers. This distributes the flow requirements across several dimensions (multiple valve openings instead of one large opening), achieving improved response time through parallel flow paths while avoiding the complexity of a single oversized valve mechanism.
Data Source
AI summary
The invention relates to a dense-phase powder pump for conveying coating powder from a first powder reservoir to a second downstream powder reservoir or to a downstream powder spray-coating gun or similar device for spraying coating powder. The dense-phase powder pump has at least one powder conveying chamber, which is/can be fluidically connected to the first powder reservoir via a powder inlet, and to the second powder reservoir or to the powder spray-coating gun or similar device for spraying coating powder via a powder outlet. At least one powder inlet valve is provided at the powder inlet and at least one powder outlet valve is provided at the powder outlet. According to the invention, in order to make the dense-phase powder pump less prone to require maintenance during operation and, in particular, to constantly guarantee a continuous and uniform conveying of the powder, regardless of the type of powder, the at least one powder inlet valve and/or the at least one powder outlet valve has/have an effective flow cross-section in the respective open state, which corresponds to at least 35% of the effective flow cross-section of the at least one powder conveying chamber.