Remote Texture Sprayer Priming via Flow-Based Control
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Solution Overview
Problem
Conventional texture sprayers require manual priming at the main unit, limiting their use in remote or hard-to-reach areas and potentially leading to premature spraying of texture mixture due to incomplete priming.
Innovation Solution
A flow-based control system with an air compressor, motor, airflow switch, and pressure switch that allows remote priming by venting airflow through a prime valve at the spray gun, ensuring consistent airflow and pressure for reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual priming is performed at the main unit, then the sprayer can be primed, but the operator cannot access remote or hard-to-reach areas and the system is less versatile
Solution Approach 1:
The system is divided into two independent control sections: a main unit containing the compressor and reservoir, and a remote control unit at the spray gun. The remote control unit includes its own flow sensor and control circuitry that can independently detect airflow and activate the priming sequence, allowing the spray gun to function autonomously in remote locations without requiring the operator to manually prime the system at the main unit.
Solution Approach 2:
The system performs self-priming through automatic detection of airflow conditions. When the spray gun is positioned in a remote location, the flow sensor at the spray gun detects airflow and automatically triggers the priming sequence, eliminating the need for manual intervention at the main unit. The system serves itself by using the actual spray airflow to initiate and control the priming process.
2Reliability
If conventional manual priming is used, then the system structure remains simple, but premature spraying may occur due to incomplete priming
Solution Approach 1:
The system incorporates a flow sensor that continuously monitors airflow through the spray gun and provides feedback to the control circuitry. This feedback mechanism allows the system to detect when priming is complete and when actual spraying should begin, preventing premature spraying by ensuring that the priming sequence is fully executed before material delivery is activated. The flow-based control creates a closed-loop system that reliably tracks the priming state.
3Length of moving object
If the spray gun is positioned far from the main unit, then access to remote areas is enabled, but maintaining adequate pressure and airflow becomes difficult
Solution Approach 1:
The control functions are extracted from the main unit and relocated to the remote spray gun. The flow sensor and control circuitry are positioned at the spray gun, allowing them to directly monitor and control pressure and airflow conditions at the point of use. This extraction enables the system to maintain adequate pressure and airflow over long hose lengths by making real-time adjustments at the remote location rather than relying on the main unit's fixed pressure regulation.
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
Enables remote priming and prevents premature spraying by ensuring adequate pressure and airflow, allowing for efficient and controlled application of texture materials in hard-to-reach areas.
Implementation Method 1
The airflow switch is situated between the spray gun and the air reservoir, and powers the motor when gas flows through the airflow switch
Implementation Method 2
The pressure switch powers the motor whenever pressure within the pneumatic line falls below a threshold value
Implementation Method 3
an air compressor disposed to send the pressurized gas down a pneumatic line
Data Source
AI summary
Apparatus and associated methods relate to remote priming of a texture sprayer. The texture sprayer includes a main unit, a hose assembly and a spray gun, the main unit includes an air compressor, a sensor that senses a parameter of air compressed by the air compressor, and a texture material pump that is activated and deactivated in response to the parameter sensed. A spray gun can be remoted coupled to the main unit via the hose assembly. The spray gun includes a nozzle, from which the texture material is forcefully expelled as a spray, a trigger, and a prime valve. Actuation of the trigger causes the spray gun to mix the compressed air with the texture material and to forcefully expel the texture material as a spray from the nozzle, thereby causing flow of the compressed air. Opening the prime valve releases the compressed air thereby causing flow of the compressed air.