Form-Coded Pinch Valve Assembly for Fast Dense Phase Pump Service
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Solution Overview
Problem
Dense phase powder pumps used in powder coating systems face challenges in serviceability and assembly due to complex designs and hard-to-replace wear parts, leading to increased maintenance and downtime.
Innovation Solution
A modular dense phase pump design featuring two housings attached by a single releasable fastener, allowing easy access to replaceable components like pinch valves and barrier elements, along with alignment indicia and off-axis purge air entry to simplify maintenance and reduce clutter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump uses a complex design with multiple fasteners and integrated housings, then the structural strength and reliability are improved, but the serviceability and ease of repair deteriorate
Solution Approach 1:
The pump housing is divided into multiple separable sections (first housing section, second housing section, third housing section) that can be detached from each other. This segmentation allows the pinch valve housing to be removed independently without disassembling the entire pump, maintaining structural integrity during operation while enabling easy access to wear parts for replacement.
Solution Approach 2:
The pinch valve housing is extracted as a separate removable component from the main pump housing. By taking out the pinch valve housing as an independent module that can be detached via the releasable fastener, the design enables easy replacement of wear parts like pinch valves without requiring disassembly of the entire pump structure.
2Ease of manufacture
If the pump housing is designed as a single integrated unit, then the manufacturing simplicity is improved, but the ease of repair and component replacement deteriorate
Solution Approach 1:
The pump housing is segmented into multiple sections that can be manufactured separately and then assembled together using fasteners. This segmentation allows each housing section to be manufactured independently using standard processes, then connected to form the complete pump housing, maintaining manufacturing simplicity while enabling easy component replacement.
Solution Approach 2:
The pinch valve housing is nested within the overall pump housing structure but remains separable. The first, second, and third housing sections are nested together to form the complete pump housing, with the pinch valve housing accessible as an intermediate layer that can be removed independently for maintenance.
3Strength
If multiple fasteners are used to attach pump housings, then the connection strength and reliability are improved, but the device complexity and assembly time increase
Solution Approach 1:
The fastening system is segmented into multiple independent fasteners, each attaching specific housing sections. This allows the strong connection requirement to be met through multiple localized fastening points rather than requiring a single complex fastening mechanism, reducing overall assembly complexity while maintaining connection strength.
Solution Approach 2:
Multiple fasteners are combined to work together as a system that secures the pump housing sections. By distributing the connection strength across multiple fasteners rather than relying on a single complex fastening mechanism, the design achieves both strong connections and simplified assembly procedures.
4Device complexity
If wear parts are made non-replaceable or integrated into the housing, then the device complexity is reduced, but the productivity and operational efficiency deteriorate due to increased downtime
Solution Approach 1:
The pump housing is segmented into separable sections that provide access to wear parts. This segmentation maintains relatively simple overall structure while enabling quick replacement of wear parts like pinch valves by removing the first housing section, thereby reducing downtime and improving operational efficiency without significantly increasing structural complexity.
Solution Approach 2:
The housing sections are designed to be pre-configured with access points and removal mechanisms for wear parts. By preparing the housing structure in advance with these access features, wear parts can be replaced quickly without requiring complex disassembly procedures, improving productivity while maintaining acceptable structural complexity.
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 design enhances serviceability by reducing maintenance time and complexity, allowing for quick replacement of wear parts without disassembling the entire pump, thereby improving operational efficiency and reducing downtime.
Implementation Method 1
a gas permeable filter disposed in the first housing
Implementation Method 2
a gas permeable filter disposed in the first housing
Implementation Method 3
a single releasable fastener that attaches the second housing and the first housing together
Implementation Method 4
purge air enters the pump housing along an axis that is transverse the gas permeable member longitudinal axis
Data Source
Figure 1
Figure 1A
Figure 2
AI summary
A dense phase pump (12) has two housings that are attached together using a single releasable fastener (98). The fastener (98)can be released to allow the two housings to be separated thereby providing access to replaceable components. The replaceable components may include one or more pinch valves (20, 24) or one or more barrier elements. A pinch valve (20, 24) for a dense phase pump (12) has a shape or profile for aligning the pinch valve (20, 24) when the pinch valve (20, 24) is installed in a pinch valve body. The pinch valve (20, 24) optionally has two end flanges (194), with each end flange (194) having a shaped periphery. The two end flanges (194) may have the same size and shape so that the pinch valve (20, 24) can be installed in either of two orientations that are inverse. A dense phase pump (12) has a pump chamber that can be purged by purge gas that enters the pump off-axis from a purge path axis.