Train Rescue Braking Synchronization via Pressure-to-Electric Conversion
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Solution Overview
Problem
The incompatibility between municipal train and rescue locomotive braking systems, leading to reduced rescue efficiency and increased costs due to the need for additional braking instruction conversion devices, results in safety and cost inefficiencies during train rescues.
Innovation Solution
A train rescue method and system that utilizes a pressure switch, pressure sensor, pneumatic piston valve, emergency braking train line, emergency braking solenoid valve, locomotive train pipe, locomotive rescue mode switch, locomotive control system, and instruction conversion unit to synchronize braking between rescue and rescued trains using electric signals, eliminating the need for multiple braking instruction conversion devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If braking systems of locomotive and faulty municipal train are not connected, then device complexity is reduced, but rescue efficiency and safety deteriorate due to low braking force and inability to apply braking synchronously
Solution Approach 1:
The patent introduces a braking instruction conversion device as an intermediary component that converts pneumatic braking instructions from the locomotive into electrical braking instructions for the municipal train. This mediator enables compatibility between the two different braking systems without requiring direct connection, thus maintaining rescue efficiency while avoiding complex direct system integration.
Solution Approach 2:
The patent replaces the traditional mechanical pneumatic braking system connection with an electrical control system. The locomotive's pneumatic braking instructions are converted to electrical signals that control the municipal train's electro-pneumatic braking system, substituting direct mechanical-pneumatic connection with electrical signal transmission and conversion.
2Reliability
If braking instruction conversion devices are installed on all municipal trains, then braking synchronization and safety are improved, but purchase costs and maintenance costs increase significantly due to low utilization rate
Solution Approach 1:
The patent makes the braking instruction conversion device multi-functional by enabling it to work in two directions: converting locomotive pneumatic instructions to train electrical instructions during rescue operations, and converting train electrical instructions to locomotive pneumatic instructions when the train provides rescue services. This universality justifies the investment by allowing the device to be used in multiple operational scenarios.
Solution Approach 2:
The patent implements a dynamic operational mode where municipal trains can switch between being rescued and providing rescue services. The braking instruction conversion device dynamically adapts its function based on the operational role of the train, enabling cost-effective deployment across the fleet through flexible role assignment.
3Reliability
If train is rescued at very low speed to ensure safety, then safety is improved, but rescue efficiency deteriorates
Solution Approach 1:
The patent implements feedback control in the braking system where the braking instruction conversion device continuously monitors and adjusts braking instructions based on real-time operational conditions. This feedback mechanism ensures safe braking at optimal speeds by dynamically adjusting braking force rather than maintaining fixed low-speed operation.
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 synchronized braking between rescue and rescued trains, reducing purchase and maintenance costs while enhancing rescue efficiency and safety by allowing one set of braking instruction conversion device to manage both trains.
Implementation Method 1
the pressure sensor collects a pressure value of the locomotive train pipe and sends the pressure value to the instruction conversion unit
Implementation Method 2
the emergency braking solenoid valve vents the locomotive train pipe by means of the pneumatic piston valve
Data Source
Figure 1~2
Figure 3~4
AI summary
A train rescue method, comprising: when a rescue locomotive applies service braking, a pressure sensor (02) collects a pressure value of a locomotive train pipe and sends same to an instruction conversion unit of the locomotive; the instruction conversion unit sends a service braking instruction and a braking level electric signal to a braking control system of a rescued train on the basis of a braking level corresponding to the pressure value; and the braking control system controls the rescued train to brake; when the rescue locomotive applies emergency braking, a pressure switch (01) of the locomotive sends an emergency braking electric signal to an emergency braking solenoid valve (05) and an emergency braking train line; the emergency braking solenoid valve (05) vents the locomotive train pipe by means of a pneumatic piston valve (04); the emergency braking train line sends the emergency braking electric signal to the braking control system of the rescued train; and the braking control system controls the train to apply emergency braking. By using the method, the economic costs and maintenance costs of rescued trains are reduced, and the rescue efficiency and safety during rescue are improved. Further provided are a train rescue system and a rescue locomotive.