Rectangular-Nozzle Blast Treatment for Gentle Surface Cleaning
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Solution Overview
Problem
Existing blast treatment methods face challenges in determining optimal conditions for cleaning structures, particularly delicate ones like cultural properties, and in removing particulate deposits from manufacturing facilities, which are labor-intensive and costly, often leading to damage or contamination.
Innovation Solution
A surface treatment method using blast media with hardness equal to or less than the member, combined with a nozzle having a specific blast opening, allows for controlled blasting to remove pollution without damaging the surface, and a blast treatment apparatus with a discharge control unit adjusts the flow rate to form a strip-shaped grinding tool for precise cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional blast treatment methods are used to clean structures, then pollution removal capability is improved, but treatment condition determination becomes complex and surface damage may occur
Solution Approach 1:
The invention changes the physical parameters of the blasting process by using water as the driving fluid instead of gas, and by controlling the flow rate of the water-blast media mixture. This simplifies the treatment condition determination while maintaining effective pollution removal capability.
Solution Approach 2:
The invention creates a universal blast treatment system that can be applied to various structures (buildings, bridges, cultural properties, manufacturing equipment) using a standardized water-based approach, eliminating the need for complex case-by-case condition determination.
2Manufacturing precision
If conventional blast treatment methods are used to remove particulate deposits, then cleaning effectiveness is improved, but labor intensity and cost increase
Solution Approach 1:
The invention enables self-service cleaning where the water-based blast system can be operated with minimal human intervention. The system automatically delivers the blasting action to remove deposits from manufacturing equipment without requiring workers to manually disassemble and clean components.
Solution Approach 2:
The invention uses hydraulic principles by employing water as the driving fluid to propel blast media. This replaces conventional gas-based pneumatic systems, providing better control and reduced labor intensity while maintaining cleaning effectiveness.
3Manufacturing precision
If conventional blast treatment methods are used, then pollution removal is improved, but surface damage and contamination risk increase
Solution Approach 1:
The invention uses water as a disposable, environmentally benign driving fluid that can be easily contained and disposed of. This eliminates the risk of contamination from reusable gas systems or chemical cleaners, and the water can be filtered and reused if needed.
Solution Approach 2:
The invention introduces water as an intermediary medium between the blast media and the surface being cleaned. This water layer acts as a buffer that reduces direct impact damage to the surface while still enabling effective pollution removal through the blast media.
4Manufacturing precision
If delicate structures like cultural properties are cleaned with conventional blast methods, then pollution removal is improved, but the risk of damaging delicate surfaces increases
Solution Approach 1:
The invention changes the driving fluid from gas to water, allowing for precise control of the blast media flow rate and pressure. This enables gentle cleaning of delicate surfaces by adjusting parameters to match the specific requirements of cultural properties without causing damage.
Data Source
AI summary
The method employs blast media containing a first grainy material, consisting mainly of a material with a hardness equal to or less than that of the target member to be restored in granular form. This blast media, along with gas, is ejected from a nozzle with a substantially rectangular-shaped outlet, while adjusting the flow rate. The ejected mixture functions as a graining tool to remove pollution, exposing underlying or surrounding surface to be restored of the target member without grinding away the surface and simultaneously providing a rough treatment to form fine texture on the restored surface.