Hydraulic Tool Testing with Controlled Load Springs
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Solution Overview
Problem
Current methods for testing and maintaining hydraulic forcible entry tools lack controlled load conditions, leading to potential tool failure due to dry seals and inability to determine the actual pressure provided during testing, which can result in insufficient spreading force during emergency situations.
Innovation Solution
A device comprising a support base, fixed plates, and compression springs that apply a controlled test load to hydraulic tools, allowing for the determination of the spreading force and ensuring the tool's readiness for emergency use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uncontrolled testing methods are used, then testing simplicity is improved, but tool reliability deteriorates due to dry seals and inability to determine actual pressure
Solution Approach 1:
A load cell is introduced as an intermediary device between the hydraulic tool and the testing structure. The load cell measures the actual force applied by the hydraulic tool during testing, providing quantitative data that was previously unavailable. This mediator enables precise measurement of spreading force while maintaining the simplicity of the testing setup.
Solution Approach 2:
The patent replaces uncontrolled manual testing methods with a controlled mechanical testing system using compression springs and a load cell. This substitution provides measurable, repeatable test conditions that ensure seals remain lubricated and actual pressure is determined, thereby improving tool reliability without significantly complicating the testing process.
2Device complexity
If no controlled load is applied, then testing complexity is reduced, but measurement precision deteriorates due to inability to determine actual pressure
Solution Approach 1:
The load cell serves as a measurement intermediary that directly quantifies the force applied by the hydraulic tool. By placing the load cell in the force transmission path, the system obtains precise pressure measurements without requiring complex testing apparatus. The load cell converts mechanical force into measurable data, solving the measurement precision problem with minimal added complexity.
Solution Approach 2:
The testing device uses the hydraulic tool's own output force to compress the springs and activate the measurement system. The tool being tested provides the force necessary to drive the test, and the load cell automatically records this force. This self-service approach eliminates the need for external power sources or complex actuation systems, maintaining low device complexity while achieving precise measurements.
3Loss of time
If seals are not lubricated during testing, then testing time is reduced, but tool reliability deteriorates due to dry seals
Solution Approach 1:
The testing device applies controlled load from the beginning of the test cycle, ensuring seals are immediately lubricated by hydraulic fluid under pressure. The compression springs are pre-positioned to engage the hydraulic tool's spreading mechanism, so that as soon as the tool operates, it encounters resistance and forces fluid through the seal system. This preliminary loading action prevents seals from running dry during the testing process.
Solution Approach 2:
The testing system maintains continuous load application on the hydraulic tool throughout the test cycle. The compression springs remain engaged, providing constant resistance that ensures hydraulic fluid continuously circulates through the seal system. This continuous useful action keeps seals lubricated throughout the entire testing duration, preventing dry seal conditions while maintaining efficient testing time.
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 device provides a controlled and reliable method for testing hydraulic tools, ensuring the seals remain lubricated and the tool can deliver the necessary spreading force, enhancing its reliability and effectiveness in emergency situations.
Implementation Method 1
one or more compression springs disposed between the movable plate and the second fixed plate. The movable plate is adapted to be moved towards the second fixed plate upon actuation of the hydraulic tool and compress the one or more compression springs to provide a compression force that provides a test load for testing the hydraulic tool.
Data Source
AI summary
Devices and methods are provided for testing and maintaining hydraulic tools and, in particular, devices and methods for testing and maintaining hydraulic forcible entry tools that are used to forcibly open locked doors, for example, in emergency situations.