Abrasive Blasting Deadman Assembly Water Injection Control
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Solution Overview
Problem
Existing abrasive blasting systems face issues with dust containment, water inefficiency, and clogging due to the mixing of dry abrasive with water, leading to fluctuations in water flow and inconsistent operation.
Innovation Solution
The system incorporates a deadman assembly with air and water injection conduits, a control panel with mode selectors, and a dual-regulator flow control scheme to manage air and water flow, preventing backflow and ensuring consistent water pressure and flow rate, thereby improving dust containment and operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dry abrasive is mixed with water in existing wet blasting systems, then dust containment is improved, but water flow becomes inconsistent and clogging occurs
Solution Approach 1:
The system separates the water injection function into distinct segments: a primary water injector for dust suppression and a secondary water injector for flow stabilization. This segmentation allows each injector to perform its specific function optimally without interfering with the other, resolving the contradiction between dust containment and flow consistency.
Solution Approach 2:
The patent introduces air as an intermediary substance that mixes with abrasive upstream of water injection. This intermediary layer prevents direct contact between dry abrasive and water, eliminating clogging while maintaining dust containment effectiveness through controlled water addition downstream.
2Object-affected harmful factors
If water pressure is increased to improve dust containment, then dust suppression improves, but water flow rate fluctuates and wastage increases
Solution Approach 1:
The system applies partial water action through the primary injector for dust suppression, then adds excess water through the secondary injector to stabilize flow. This two-stage partial action ensures minimum water usage for dust control while preventing the excessive water wastage that would occur with a single high-pressure injection system.
Solution Approach 2:
The patent changes water injection parameters by using two separate injectors with different injection points and pressures. The primary injector uses lower pressure for dust suppression, while the secondary injector provides higher pressure for flow stabilization, optimizing water usage efficiency across different operational phases.
3Adaptability or versatility
If abrasive is introduced into water injection system, then wet blasting function is achieved, but nozzle clogging occurs due to abrasive particles
Solution Approach 1:
The system performs preliminary mixing of abrasive with air upstream of the water injection point. This preliminary action creates a prepared abrasive-laden air stream that is then combined with water downstream, preventing abrasive particles from entering and clogging the water injection nozzle while maintaining wet blasting functionality.
Solution Approach 2:
The patent extracts the abrasive introduction function from the water injection system by using a separate air-based delivery system. Abrasive is introduced through air injection upstream, while water injection occurs downstream through dedicated water injectors, completely separating the two functions and eliminating clogging risks.
4Ease of operation
If flow control is simplified to improve operation ease, then ease of operation improves, but water flow becomes inconsistent and cycles between flow and no flow
Solution Approach 1:
The secondary water injector acts as a self-service flow stabilization mechanism that automatically compensates for flow inconsistencies without requiring operator intervention. The system self-regulates by introducing additional water when flow becomes inconsistent, maintaining steady operation while keeping the control interface simple.
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 enhances dust containment, reduces water wastage, and stabilizes water flow, ensuring consistent blasting performance and reducing the risk of clogging, thereby improving the overall efficiency and reliability of the abrasive blasting process.
Implementation Method 1
a supply of abrasive media (sand or other types of particles, such as grit or the like) 114 is mixed with a fast-moving stream of air 112, usually in a mixer or valve 110. The media 114 becomes entrained in the air 112
Implementation Method 2
Abrasive blasting is the process of forcibly propelling a high pressure, high velocity stream of abrasive material against a surface in order to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface materials
Implementation Method 3
The system incorporates a deadman assembly with air and water injection conduits, a control panel with mode selectors, and a dual-regulator flow control scheme to manage air and water flow
Data Source
AI summary
An abrasive blasting system that includes a blast hose; and a deadman assembly operably coupled therewith for controlling discharge out of the blast hose. The deadman assembly has a position of either a signal-flow or a no-flow position. When engaged to the signal-flow position, a burst or pulse of purge air is transferred to a mixer via a water injection conduit.