Abrasive Blasting Deadman Assembly with Segmented Venting

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Solution Overview

Problem

Abrasive blasting systems face challenges with rapid shutdown, sound pollution, and unwanted abrasive buildup due to existing deadman systems, particularly in hazardous areas where electrical components are not tolerated, and pneumatic systems have delayed response times.

Innovation Solution

A pneumatic-controlled abrasive blasting system with a deadman assembly featuring a primary and secondary signal device, a trigger member, and a lock flap mechanism that allows for controlled airflow and abrasive venting, reducing noise and abrasive accumulation, and enabling rapid shutdown without electrical components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a traditional deadman system with combination valve is used to rapidly dissipate residual compressed air, then shutdown speed is improved, but noise level increases and abrasive accumulation occurs

Engineering Contradiction:

Improveshutdown speedVSAvoidnoise and abrasive accumulation

Core Design Contradiction:

SpeedVSObject-generated harmful factors

Solution Approach 1:

The system separates the venting function from the main blast line by introducing a dedicated vent line with a vent valve. This segmentation allows residual compressed air to be discharged through a separate pathway, reducing the violent release and abrasive accumulation at the main exhaust while maintaining rapid shutdown capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A vent valve acts as an intermediary component that controls the discharge of residual compressed air through a dedicated vent line. This intermediary mechanism provides controlled venting that reduces noise and prevents abrasive accumulation compared to direct discharge through the main exhaust.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a pneumatic deadman system is used in hazardous areas, then electrical component safety is improved, but response time increases

Engineering Contradiction:

Improvesafety in hazardous areasVSAvoidresponse time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system pre-positions control valves and signal lines in a ready state, allowing the pneumatic deadman to initiate shutdown immediately upon trigger release. The pre-configured pneumatic circuitry eliminates delays associated with electrical signal processing, enabling rapid response while maintaining safety in hazardous areas.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If the vent port is opened to dissipate residual compressed air, then system purging is improved, but abrasive accumulates around the blowdown muffler

Engineering Contradiction:

Improvesystem purging efficiencyVSAvoidabrasive accumulation

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

The system extracts the venting function from the main exhaust pathway by creating a separate vent line. This extraction directs residual compressed air away from the blowdown muffler area, preventing abrasive accumulation while maintaining effective system purging.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20230347472A1Methods and Systems for Abrasive Blasting

Publication Date: 2023.11.02 AXXIOM MANUFACTUING

AI summary

An abrasive blasting system that includes a blast hose, and a deadman assembly coupled with the blast hose. The deadman assembly further includes a primary deadman signal device and a secondary deadman signal device. The deadman also has a base frame, with each of the primary deadman signal device and the secondary deadman signal device coupled with the base frame. There is a trigger member movably coupled with the base frame, the trigger member configured to contact and move the primary deadman signal device to a signal-flow position, and also to contact and move the secondary deadman signal device to a secondary signal-flow position.