3-Way Switch Mechanism for Gas-Insulated Apparatus
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Solution Overview
Problem
Gas-insulated switchgear (GIS) devices face an increase in size due to a larger driving radius, necessitating a method to convert rotational motion into linear motion for neutrality, disconnection switching, and earthing switching.
Innovation Solution
A 3-way switch design incorporating rotatable connecting rollers between levers and a main lever that rotates 90° to transfer turning force from an external operating machine, converting rotational motion into linear motion for switching operations within a gas-insulated apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rotation axis with pins connecting levers and operating elements is used, then the DS and ES can be operated simultaneously with one mechanism, but the driving radius and device size increase
Solution Approach 1:
Instead of using a traditional rotation axis with pins that requires large driving radius, the patent inverts the approach by using a linearly movable rod that converts linear motion into rotational motion of levers. This inversion of the motion conversion direction enables integrated operation while reducing the device footprint.
Solution Approach 2:
The patent changes the motion parameter from rotational motion (traditional axis rotation) to linear motion (rod displacement). By using linear displacement of the rod to drive the levers through guide holes, the driving radius is reduced while maintaining the integrated operation capability of DS and ES.
2Adaptability or versatility
If a rotation axis mechanism is used to connect levers and operating elements, then switching operations can be achieved, but the driving radius increases leading to larger device size
Solution Approach 1:
The patent inverts the traditional motion conversion approach by using linearly movable rods that convert linear motion into lever rotation, rather than using a rotating axis to drive linear motion. This reduces the driving radius while maintaining switching operation capability.
Solution Approach 2:
The patent introduces linearly movable rods as intermediary elements between the driving force and the levers. These rods with guide holes convert linear displacement into rotational motion of levers, serving as a compact mediator that reduces the driving radius compared to direct axis rotation.
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 solution reduces the driving radius and size of the device by enabling the main lever to switch operating parts to linear motion for neutrality, disconnection, and earthing switching efficiently.
Implementation Method 1
a main lever, one end of which is rotatably coupled to the support conductor, and the other end of which is rotatably connected to both the other end of the first connecting lever and the other end of the second connecting lever
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
Provided is a 3-way switch for a gas-insulated apparatus, including a pressure container having a space part therein, the pressure container including a first connecting part in an upper portion of the space part and a second connecting part in a side portion of the space part such that the second connecting part is perpendicular to the first connecting part, a support conductor provided in the space part, the support conductor having a first guide hole defined in a direction perpendicular to the direction of the first connecting part and a second guide hole defined in a direction parallel to the direction of the second connecting part, a disconnecting switch (DS) operating part slidably coupled to the first guide hole, the DS operating part being connected to or separated from the first connecting part by means of an insertion or extrusion thereof, an earthing switch (ES) operating part slidably coupled to the second guide hole such that the ES operating part is perpendicular to the disconnecting switch operating part, the ES operating part being connected to or separated from the second connecting part through an insertion or protrusion thereof, and a main lever, one end of which is rotatably coupled to the support conductor and the other end of which is eccentrically rotated and rotatably connected to the DS operating part and the ES operating part so as to linearly slide the DS operating part and the ES operating part into neutral positions.