Pneumatic Hydraulic Tool Buffer Valve for Supply Failure
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Solution Overview
Problem
Pneumatically operated hydraulic tools cease functioning if there is a drop in pressure in the input line, leading to incomplete work processes and potential damage to partially set rivets, as they lack a reliable buffer to ensure completion of tasks during compressed air supply failures.
Innovation Solution
A system with a pneumatically operated hydraulic tool, a shut-off valve, and a carriage that includes a buffer storage for pneumatic fluid, allowing the tool to complete ongoing work processes using stored compressed air and preventing new processes from starting after completion, ensuring safe operation without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a buffer store is connected via a one-way valve to the compressed air hose, then the tool can complete a work process once started even if compressed air supply fails, but the tool may stop feeding during an ongoing work process when buffer pressure drops
Solution Approach 1:
The patent introduces a shut-off valve that automatically closes when buffer pressure drops below a threshold, preventing the tool from starting new work processes. This preliminary action ensures that the buffer is reserved for completing ongoing processes, eliminating the problem of buffer exhaustion during work operations.
Solution Approach 2:
The shut-off valve is equipped with a pressure sensor that continuously monitors buffer pressure and provides feedback to the valve control. When pressure drops below the threshold, the feedback signal triggers the valve to close, automatically regulating buffer usage and preventing tool stoppage during ongoing work processes.
2Reliability
If the compressed air supply is interrupted during rivet setting, then the work process stops before completion, but providing a buffer store allows completion of the first operation
Solution Approach 1:
The shut-off valve with automatic pressure monitoring and control enables the pneumatic system to self-regulate buffer usage without user intervention. The system automatically detects pressure drops and closes the valve, ensuring ongoing work processes can complete while preventing new processes from starting, thus maintaining reliability without requiring user awareness of supply interruptions.
3Reliability
If sufficient buffer volume is provided to complete one full stroke work process, then the tool can finish the first operation, but another work process cannot be started due to insufficient pressure
Solution Approach 1:
The shut-off valve proactively closes when buffer pressure drops, preventing the tool from attempting to start new work processes. This preliminary action ensures the buffer volume is preserved for completing ongoing processes, eliminating the limitation of single-operation completion and enabling continuous operation as long as the supply is restored.
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
Ensures that pneumatically operated hydraulic tools can safely and reliably complete ongoing work processes even during compressed air supply failures, preventing tool stoppages and potential damage, while preventing new processes from initiating until the supply is restored.
Implementation Method 1
a buffer storage for pneumatic fluid connected between the connection for the pneumatic line and the pneumatic piston
Implementation Method 2
a shut-off valve which interrupts the compressed air supply to the pneumatic piston in the event of a pressure drop
Data Source
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AI summary
System with a pneumatically operated hydraulic tool, in particular for pulling and/or pressing, comprising a connection for a pneumatic line, wherein a buffer reservoir for pneumatic fluid is connected between the connection for the pneumatic line, which supplies the hydraulic tool with compressed air to complete a work operation after a pressure drop at the connection of the pneumatic line, wherein the system includes a shut-off valve which stops the pressure supply to the pneumatically operated hydraulic tool after completion of the work operation.