Railroad Car Unit Switch with Dual Fixed Electrode Connections
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Solution Overview
Problem
Conventional switching devices for railroad cars require an increase in the number of components and size when connecting two circuits to one electrical connection part, due to the need for a T-shaped branch solid insulated bus.
Innovation Solution
The proposed electric system for a railroad car features a switching device with a vacuum interrupter having two electrical connection parts on the fixed electrode side and one on the movable electrode side, along with a current collecting mechanism and insulated operating rod, allowing for independent opening and closing of movable electrodes, and connections to multiple circuits via a circuit connection bus, pantograph circuit, arrester, and ground circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a T-shaped branch solid insulated bus is used to connect two circuits to one electrical connection part, then the connectivity requirement is met, but the number of components and device size increase
Solution Approach 1:
The fixed electrode side is designed with two electrical connection parts that can serve multiple functions. Each connection part can independently connect to different circuits (such as AC circuit, DC circuit, ground circuit, or arrester circuit), allowing a single unit switch to handle multiple circuit configurations without requiring additional T-shaped branch buses or extra components.
2Adaptability or versatility
If a T-shaped branch solid insulated bus is used to connect two circuits to one electrical connection part, then the connectivity requirement is met, but the device size increases
Solution Approach 1:
The unit switch structure incorporates two independent electrical connection parts on the fixed electrode side, enabling the device to directly connect to multiple circuits without requiring external T-shaped branch buses. This integration eliminates the need for additional space-consuming components and reduces the overall device footprint while maintaining full connectivity capabilities.
3Device complexity
If conventional unit switch configuration is used, then the structure is simple, but the ability to connect multiple circuits without additional components is limited
Solution Approach 1:
The unit switch is segmented into distinct functional components: the vacuum interrupter with movable and fixed electrodes, and two separate electrical connection parts on the fixed electrode side. This segmentation allows each connection part to independently interface with different circuits while maintaining the overall simplicity of the unit switch structure. The modular design enables flexible circuit connections without complicating the core switching mechanism.
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
This configuration prevents the increase in the number of components and device size, even when connecting two circuits, by eliminating the need for a T-shaped branch solid insulated bus and optimizing the electrical connections.
Implementation Method 1
a vacuum interrupter (1) including a movable electrode (5) and a fixed electrode (3) disposed so as to face each other
Implementation Method 2
the vacuum interrupter (1) being molded with a solid insulator (21)
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The objective of the present invention is to be able to prevent an increase in the number of components and an increase in the size of the device when connecting two circuits to one of the electrical connection parts. In order to solve the above problem, this unit switch is characterized in that a vacuum interrupter, which is provided with at least a movable electrode and a fixed electrode disposed so as to face each other, is molded by a solid insulation material, has two electrical connection parts on the fixed electrode side and one electrical connection part on the movable electrode side, and is provided with a current collecting mechanism and an insulated operating rod which is for driving the movable electrode so as to enable opening and closing, said current collecting mechanism and insulated operating rod being provided on the movable electrode side.