Magnetic Inductive Rail Heating Head for Snow Melting
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Solution Overview
Problem
Existing railway heating systems, such as open flame heaters and electric resistive elements, are inefficient and costly, pose safety risks, and require frequent maintenance, as they cannot be left in place during track maintenance and can fail completely when one element burns out, disrupting rail traffic.
Innovation Solution
The use of magnetic inductive heating coils that attach to the rail and are powered by a central control panel, utilizing 120VAC to generate heat directly within the rail, with multiple heads that can operate independently and adjust power based on conditions, ensuring continuous operation and reduced energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electric resistive heating elements are used to heat rails, then the rails can be heated to melt snow and ice, but the system consumes vast amounts of electrical energy and requires frequent maintenance
Solution Approach 1:
The patent replaces electric resistive heating elements with a magnetic inductive heating system. Instead of using electrical resistance to generate heat, the system uses a magnetic inductive coil to induce eddy currents within the rail itself, which generates heat internally through the rail's own electrical resistance. This substitution reduces overall energy consumption while maintaining effective heating capability.
Solution Approach 2:
The patent changes the heating mechanism from external resistive heating to internal inductive heating. By altering the fundamental heating parameter from external electrical resistance to internal eddy current induction, the system achieves more efficient energy utilization and reduced power consumption while maintaining the required temperature elevation for snow and ice melting.
2Temperature
If electric resistive heating elements are attached along the rail, then the rails can be heated, but the equipment must be removed during routine track maintenance as it will damage parts if left in place
Solution Approach 1:
The heating system is divided into multiple independent magnetic inductive coil assemblies that can be selectively installed and removed. Each coil assembly is a separate unit that clamps onto the rail, allowing individual units to be maintained or replaced without affecting other sections. This segmentation enables easier maintenance operations compared to continuous resistive heating elements.
Solution Approach 2:
The magnetic inductive coils are designed as clamp-on assemblies with flexible mounting mechanisms that allow them to be attached to and removed from the rail without causing damage. The coil assemblies feature non-destructive attachment methods that preserve rail integrity during installation and removal, eliminating the need to remove equipment during routine maintenance.
3Temperature
If open flame gas heaters are used to heat rails, then the rails can be heated to melt snow and ice, but the system is dangerous and expensive to operate
Solution Approach 1:
The patent replaces open flame gas heating with magnetic inductive heating. Instead of using combustion to generate heat, the system uses electromagnetic induction to generate heat directly within the rail. This substitution eliminates open flames and associated safety hazards such as fire risk, while also reducing operational costs by eliminating the need for continuous gas supply infrastructure.
Solution Approach 2:
The patent converts the rail's electrical resistance, which would normally be considered a source of energy loss, into a beneficial heating mechanism. By inducing eddy currents within the rail, the system utilizes the rail's inherent electrical properties to generate heat internally, transforming what could be seen as a harmful effect (energy dissipation) into a useful function (snow and ice melting) without the safety hazards of open flames.
4Temperature
If Calrod heating elements are used, then the rails can be heated, but when one element burns out or fails, the entire 30-foot section fails and shuts down the switch for rail traffic
Solution Approach 1:
The heating system is divided into multiple independent magnetic inductive coil assemblies distributed along the rail section. Each coil operates independently and can be controlled individually. This segmentation ensures that if one coil fails or requires maintenance, the other coils continue to provide heating, preventing complete system shutdown and maintaining rail traffic flow.
Solution Approach 2:
The system incorporates redundancy through multiple independent coil assemblies, providing a cushion against failure. By distributing the heating function across multiple independent units rather than relying on a single continuous element, the system is protected against total failure. The redundant design ensures that temporary failures or maintenance of individual coils do not compromise overall system reliability or cause traffic shutdowns.
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 inductive heating system efficiently maintains rail temperature above 98 degrees with reduced energy use, allowing for continuous operation without the need for frequent maintenance removal and minimizing disruptions, as it can self-adjust and operate remotely, ensuring safe and efficient rail function during winter conditions.
Implementation Method 1
The induction coil is used to induce eddy current magnetic fields on the at least one train track rail so that the molecules of the at least one train track rail are excited which leads to generation of heat
Implementation Method 2
The induction coil is used to induce eddy current magnetic fields on the at least one train track rail
Implementation Method 3
the molecules of the at least one train track rail are excited which leads to generation of heat
Data Source
AI summary
A rail heating head includes a vented enclosure and an induction coil. The induction coil is positioned within the vented enclosure. When in use, the vented enclosure is positioned adjacent a lateral portion of a train track rail. To be positioned adjacent to the head, the web, and the foot of the train track rail, a rail-bracing wall of the vented enclosure has a convex exterior surface and a concave interior surface. The induction coil has an oblong, concave shape and is pressed against the concave interior surface. Thus, the induction coil can induce eddy current magnetic fields in the head, the web, and the foot maximizing surface area. The larger surface area results in molecules in a large area being activated and leads to more heat. An eddy current deflecting magnetic shield further directs magnetic fields towards the train track rail.