Abrasive Blasting Deadman Control With Air-Purge Clog Prevention

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Solution Overview

Problem

Existing abrasive blasting systems face inefficiencies in water usage, dust containment, and clogging issues, leading to hazardous conditions and inconsistent operation.

Innovation Solution

An abrasive blasting system with a deadman assembly that controls the flow of air, water, and abrasive media through a mixer, utilizing a two-regulator flow control scheme to stabilize and meter water flow, and an air purge to prevent clogging, allowing for efficient and controlled blasting operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If wet media blasting systems are used to minimize airborne media, then dust containment is improved, but water usage efficiency deteriorates due to waste and clogging issues

Engineering Contradiction:

Improvedust containmentVSAvoidwater usage efficiency

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

The system performs preliminary actions by purging the water injection system with pressurized air before introducing water and abrasive media. This prevents clogging from occurring in the first place, eliminating the need for shutdowns and cleaning, thereby maintaining water usage efficiency while achieving dust containment through wet blasting

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system is self-cleaning through automated air purging cycles that clear the water injection system of abrasive particles. This self-service mechanism prevents clogging without requiring external intervention or system shutdown, maintaining both dust containment and water usage efficiency

Inventive Principle:

Principle #25Self-service

2Productivity

If air valve opens to start blast, then blasting operation begins, but abrasive particles are forced into water injection nozzles causing clogging

Engineering Contradiction:

Improveblasting operationVSAvoidnozzle clogging

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system performs preliminary purging of the water injection system with pressurized air through purge lines before the air valve opens for blasting. This preliminary action removes abrasive particles that would otherwise be forced into nozzles during operation, preventing clogging while maintaining productivity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies preliminary anti-action by using pressurized air to counteract and prevent the harmful effect of abrasive particles entering the water injection system. The purging action occurs before the problematic condition can develop, eliminating clogging risk while maintaining continuous blasting operation

Inventive Principle:

Principle #9Preliminary anti-action

3Ease of operation

If flow orifice control systems are used, then water flow control is implemented, but flow rate fluctuations and inconsistency occur

Engineering Contradiction:

Improvewater flow controlVSAvoidflow rate consistency

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The system implements periodic air purging cycles through the water injection system to prevent abrasive buildup that causes flow inconsistencies. This periodic maintenance action maintains stable water flow characteristics while preserving ease of operation through automated control

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system uses feedback from flow sensors and system pressure monitoring to detect conditions that may lead to clogging or flow inconsistency. This feedback triggers automated purging cycles, maintaining stable flow rates while preserving ease of operation through closed-loop control

Inventive Principle:

Principle #23Feedback

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 system provides stable and controlled abrasive blasting with reduced dust emission, improved water efficiency, and prevents clogging, enhancing safety and operational consistency.

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

Methodology Applied

Scientific EffectCompressed air propulsion: Pressure Gradient

Implementation Method 2

Abrasive blasting is the process of forcibly propelling a high pressure, high velocity stream of abrasive material against a surface

Methodology Applied

Scientific EffectAir abrasion: Abrasion

Implementation Method 3

Wet media blasters have been created to minimize the generation of airborne media during blasting operations

Methodology Applied

Scientific EffectWet blasting dust suppression: Absorption (physical)

Implementation Method 4

When engaged, an air valve may open to start the blast, which may inadvertently pressurize the water injection tubing in dry blasting

Methodology Applied

Scientific EffectHydraulic pressure flow: Pressure Gradient

Data Source

PatentUS20250229380A1Apparatus, methods, and systems for abrasive blasting

Publication Date: 2025.07.17 AXXIOM MANUFACTUING

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.