Pneumatic Excavator Flow Valve Control for Non-Damaging Soil Loosening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing excavators using compressed air for loosening soil generate hazardous waste due to water contamination and can damage objects with mechanical digging implements.
Innovation Solution
A pneumatically actuated excavator with a flow valve system that controls compressed air flow through an actuator and barrel, allowing for controlled air delivery and prevention of waste generation and object damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressurized water is used to loosen soil, then the soil can be effectively loosened, but hazardous waste is generated due to water mixing with contaminants in the soil
Solution Approach 1:
The patent replaces water-based hydraulic systems with a pneumatic system that uses compressed air to loosen soil. The pneumatic excavator delivers controlled bursts of compressed air through a nozzle to fragment and move soil, eliminating the need for water that creates hazardous waste while maintaining effective soil loosening capability
2Productivity
If mechanical digging implements with hard cutting edges are used, then soil can be effectively dug, but objects to be excavated or cleaned are damaged
Solution Approach 1:
The patent replaces mechanical cutting edges with a pneumatic blasting system. Compressed air is delivered through a nozzle to create high-velocity air jets that fragment soil and move debris without physical contact with the objects being excavated, thereby preventing damage to pipes, cables, and other buried objects while maintaining effective digging productivity
3Productivity
If compressed air is delivered continuously, then soil loosening is effective, but energy is wasted and control is reduced
Solution Approach 1:
The pneumatic excavator employs a reciprocating piston mechanism that delivers compressed air in periodic bursts rather than continuous flow. The piston moves back and forth within the barrel, creating intermittent high-velocity air jets that effectively loosen soil through repeated impact while allowing energy recovery during the return stroke, thereby reducing overall energy waste while maintaining loosening effectiveness
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 effectively loosens soil without generating hazardous waste and avoids damage to objects by precisely controlling compressed air flow.
Implementation Method 1
Actuating the actuator causes compressed air to be transmitted from the actuator through the at least one air actuation conduit to a first port of the flow valve to cause the flow valve to move to an open position
Implementation Method 2
In the closed position, the flow valve prevents the compressed air from the supply of compressed air from passing therethrough. In the closed position, a piston of the flow valve seals against a valve seat
Implementation Method 3
In the closed position, a piston of the flow valve seals against a valve seat
Data Source
AI summary
A pneumatic excavator configured to be pneumatically actuated includes an actuator; a flow valve fluidly coupled to the actuator an air actuation conduit; and a barrel coupled to an egress of the flow valve, where the barrel defines an outlet of the pneumatic excavator. Actuating the actuator causes compressed air to be transmitted from the actuator through the an air actuation conduit to a first port of the flow valve to open the flow valve and compressed air from a supply of compressed air passes through the flow valve and the outlet of the pneumatic excavator. Releasing the actuator causes the compressed air to be transmitted from the actuator through the at least one air actuation conduit to a second port of the flow valve to cause the flow valve to close and the flow valve prevents the compressed air from the supply of compressed air from passing therethrough.