Crane Telescope Locking Valve for Emergency Cylinder Release
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Solution Overview
Problem
Existing locking mechanisms for crane telescopes become inaccessible for maintenance or repair when control electronics fail, making it difficult to release the cylinder lock, especially when the crane is in an unfavorable position.
Innovation Solution
A locking device with a control valve that automatically reverts to an open position in case of control electronics failure, allowing hydraulic fluid to flow between the telescoping cylinder and the cylinder lock hydraulic cylinder, enabling the cylinder lock to be released by pressurizing the hydraulic cylinder with the cylinder space, and includes a return line with a bypass to facilitate unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control device retrieves hydraulic fluid from a cylinder space in the telescoping cylinder and uses valves to control flow, then the locking mechanism can be actuated, but the valves become inaccessible in most operational positions making repair impossible when control electronics fail
Solution Approach 1:
The patent introduces a manually operable release mechanism as an intermediary between the hydraulic system and the lock. This manual release can directly actuate the lock without requiring access to the control valves or electronics, providing a fallback method when the normal control system fails. The manual release serves as a mediator that bypasses the inaccessible control components.
2Ease of operation
If the valve closes the hydraulic connection during normal operation, then the locking mechanism can be controlled, but when control electronics fail the valve remains closed preventing emergency release
Solution Approach 1:
The patent incorporates a manual release mechanism that is prepared in advance to override the closed valve position. This preliminary action capability allows operators to manually open the hydraulic connection and release the lock even when the electronic control system has failed and the valve remains closed. The manual release is pre-positioned to provide emergency intervention capability.
3Stability of the object's composition
If the crane telescope is in an unfavourable position during control failure, then the locked position may be stable, but recovery requires significant effort
Solution Approach 1:
The patent extracts the release function from the normal control system and provides it through a separate manual release mechanism. This extracted capability allows the lock to be released independently of the crane's operational position or the failed electronic control system. The manual release can be actuated regardless of the telescope's position, eliminating the need for complex recovery operations.
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 automatic emergency operation to release the cylinder lock when control electronics fail, allowing the crane to be moved to a favorable position for inspection or repair, ensuring safer and easier maintenance.
Implementation Method 1
a valve which is open in an inactivated resting state and thus opens a fluidic connection between the telescoping cylinder and the at least one cylinder lock hydraulic cylinder
Data Source
AI summary
A crane telescope locking device includes a control device which is hydraulically in contact with a telescoping cylinder of a crane telescope and, for the purpose of actuating, with at least one cylinder lock hydraulic cylinder and includes a valve which is open in its inactivated resting state and thus opens a fluidic connection between the telescoping cylinder and the at least one cylinder lock hydraulic cylinder. A telescoping cylinder (6) of a crane includes such a crane telescope locking device.