Shunt Release Blocking Element for Pre-charged Spring Installation
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Solution Overview
Problem
The installation of shunt releases in electrical switching devices is challenging due to increased space requirements and safety concerns when tensioning the spring accumulator during installation, making it difficult to achieve a pre-charged state efficiently.
Innovation Solution
A shunt release design featuring a blocking element that holds the storage element in a tensioned position during production or before assembly, allowing for preloading and simplifying the installation process, with a rotary wheel and cam mechanism for efficient energy storage and release, and an activation element connected to the electrical switching device for safe tripping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring accumulator is tensioned during installation, then the shunt release is provided in a charged position with mechanical energy stored, but the space requirement during installation increases and installation becomes more difficult
Solution Approach 1:
The invention separates the tensioning function from the blocking function by dividing the blocking element into two functional parts: a first blocking element that blocks the storage element in the tensioned position, and a second blocking element that blocks the storage element in the released position. This segmentation allows the spring accumulator to be tensioned during installation without requiring additional space, as the blocking elements are integrated into the existing structure.
Solution Approach 2:
The spring accumulator can be tensioned in advance during installation or production, and the blocking elements are positioned to maintain this pre-charged state. The first blocking element is configured to hold the storage element in the tensioned position before the shunt release is activated, eliminating the need to tension the spring during operation and reducing the space required during installation.
2Reliability
If the spring accumulator is tensioned during installation, then the shunt release is provided in a charged position, but the safety of the user cannot be guaranteed
Solution Approach 1:
The blocking elements serve as intermediaries between the storage element and the activation mechanism. The first blocking element prevents the storage element from releasing energy during installation and production, while the second blocking element controls the release during operation. This intermediary mechanism ensures that the spring accumulator can be safely tensioned without direct human intervention in the high-energy zone, eliminating safety risks for users.
Solution Approach 2:
The blocking elements are designed to automatically engage and disengage based on the position of the storage element and the activation state. The first blocking element automatically holds the tensioned position during installation, and the second blocking element automatically controls the release during operation. This self-service mechanism eliminates the need for manual tensioning operations, ensuring user safety while maintaining the charged position.
3Productivity
If a blocking element is used to hold the storage element in the charged position, then the installation process is simplified and assembly time is reduced, but the device complexity increases
Solution Approach 1:
The blocking elements are designed to perform multiple functions: the first blocking element holds the storage element in the tensioned position during installation and production, while the second blocking element controls the release during operation. These blocking elements are integrated into the existing shunt release structure, serving both as safety mechanisms and as installation aids. By making the blocking elements multi-functional, the device complexity is minimized while still achieving the goal of simplified installation and reduced assembly 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
Enables simple and safe installation of the shunt release in a pre-charged state, reducing assembly time and costs while ensuring reliable energy storage and release for interrupting current flows during undervoltage or current pulses.
Implementation Method 1
having a spring element, a storage element (10) that can be moved between a charged and a discharged position
Implementation Method 2
A shunt release design featuring a blocking element that holds the storage element in a tensioned position during production or before assembly, allowing for preloading and simplifying the installation process, with a rotary wheel and cam mechanism for efficient energy storage and release
Data Source
Figure 1
Figure 2
AI summary
The device (1) has a storage element (10) i.e. rotary wheel, movable between a tensioned position (11) and a detensioned position. The storage element emits mechanical energy to a trip element (13) in the tensioned position when the storage element is activated by an activation element (14). A movably supported blocking element (20) is connected to the storage element at a position in the storage element's tensioned position such that the storage element is held by the blocking element. The blocking element releases the storage element to perform a movement (12) in another position. An independent claim is also included for an electrical switching device.