Integral Block Powder Pump Sealing and Speed
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Solution Overview
Problem
Sealing difficulties and operational delay times in dense phase powder pumps used in powder spray coating devices lead to reduced operational speed and efficiency, particularly due to sealing issues between blocks and control valves, and large volumes requiring selective air evacuation or pressurization.
Innovation Solution
An integral structural block design that integrates all necessary components, including powder intake and outlet valves and their control valves, directly connected to ducts within the block, with external pneumatic conduits for control valves, minimizing internal interfaces and using pinch valves with flexible hoses for valve operation, and incorporating a filter to prevent powder entry into the ducts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate blocks are used for feed chambers and control valves, then ease of manufacture is improved, but sealing reliability deteriorates due to multiple interfaces
Solution Approach 1:
The patent merges the feed chamber block and control valve block into a single integrated housing structure. The control valves are mounted directly on the housing that contains the feed chambers, eliminating the need for separate sealing interfaces between blocks. This integration maintains manufacturing simplicity while ensuring reliable sealing by reducing the number of potential leak paths.
2Ease of operation
If separate blocks with large internal volumes are used, then ease of operation is improved, but productivity deteriorates due to operational delay times
Solution Approach 1:
By integrating the control valves directly onto the housing containing the feed chambers, the patent minimizes the internal volume that requires selective air evacuation or pressurization. This reduction in internal volume decreases the time required for pressure equalization during operation, thereby increasing productivity while maintaining ease of operation through the unified structural design.
3Adaptability or versatility
If multiple interfaces between blocks and valves are used, then adaptability is improved, but reliability deteriorates due to sealing problems
Solution Approach 1:
The patent achieves adaptability through the integrated housing design that can accommodate different configurations of feed chambers and control valves within the same structure. By eliminating separate block interfaces, the design reduces sealing problems while maintaining versatility through flexible internal arrangement possibilities and standardized mounting interfaces for different valve types.
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
This design reduces sealing problems and shortens operational delay times, enhancing the operational speed and efficiency of the powder feed apparatus by eliminating internal interfaces and allowing for rapid assembly and maintenance.
Implementation Method 1
The vacuum from said vacuum source aspirates powder through the open powder intake valve into the feed chamber
Implementation Method 2
The compressed conveying air from the source of compressed conveying air discharges powder from within the feed chamber through the open outlet valve
Implementation Method 3
a filter permeable to air but not to coating powder
Data Source
Figure 1
Figure 2~5
Figure 6~8
AI summary
A powder spraycoating equipment's powder feed apparatus containing a dense phase powder pump (10) fitted with at least one, preferably two feed chambers each of which comprises at one chamber end a powder intake valve (12, 14) and at the opposite chamber end a powder outlet valve (Q3, Q4) and further comprises at least one air exchange aperture (12.3, 14.3) to altematingly apply compressed conveying air or a partial vacuum to the feed chamber (12, 14), characterized by an integral structural block (60), by the feed chambers (12, 14) being constituted in the structural block 60, by all those first control valves (1.5, 1.6) that are connected in fluid communication to the minimum of one feed chamber (12, 14) for the purpose of applying compressed conveying air and a partial vacuum to it, being configured at the structural block (60) and being directly connected, in fluid communication and by means of ducts (66) constituted in the structural block (60), to the minimum of one feed chamber (12, 14).