Remote Coal Mine Leakage Test Device
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Solution Overview
Problem
Existing remote leakage test methods for coal mines are unsafe, irregular, inconvenient, and time-consuming, requiring on-site assistance and manual handling of high-voltage components, which violates explosion protection standards and lacks accurate monitoring.
Innovation Solution
A remote coal mine leakage test method and apparatus that involves installing a leakage test device at the most distal control switch, using a detection circuit to induce grounding current, and monitoring the coal mine power line for successful tripping, eliminating the need for on-site gas inspectors and manual handling of high-voltage components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual test resistor connection method is used, then leakage test can be performed, but safety is compromised due to required on-site handling of high-voltage components
Solution Approach 1:
The patent introduces a specialized leakage test device as an intermediary between the power supply and the leakage protection device. This device includes a test resistor, switching component, and indication component integrated in an explosion-proof housing, eliminating the need for direct manual handling of high-voltage components while maintaining test reliability.
Solution Approach 2:
The patent extracts the dangerous manual operation steps (opening explosion-proof caps, connecting test resistors on live lines) and replaces them with an automated test device that can be operated remotely or with minimal intervention, thereby removing the harmful factors while preserving the essential testing function.
2Reliability
If manual test resistor connection method is used, then leakage test can be performed, but operation convenience deteriorates due to requirement of multiple personnel and complex procedures
Solution Approach 1:
The patent merges multiple separate operations (gas inspection, power down verification, test resistor connection, test execution, result observation) into a single integrated test device that can perform all functions automatically. The device combines the test resistor, switching mechanism, indication system, and explosion-proof housing into one unit, allowing a single operator to conduct the complete test.
Solution Approach 2:
The test device is designed to be self-contained with all necessary components (test resistor, switching component, indication component) integrated within the explosion-proof housing. The device performs self-verification through the indication component that displays test results directly, eliminating the need for external assistance or complex procedural steps.
3Reliability
If manual test resistor connection method is used, then leakage test can be performed, but time consumption increases due to multiple sequential steps
Solution Approach 1:
The test device is pre-configured with the test resistor and switching components already installed and connected within the explosion-proof housing before deployment. This preliminary preparation eliminates the need for on-site assembly and connection steps, allowing the test to be executed immediately when the device is activated.
Solution Approach 2:
The test device enables continuous operation without interruption for gas inspections, power down verifications, or component connections. The integrated design allows the testing process to proceed continuously from activation to result display, eliminating the sequential delays inherent in manual methods.
4Reliability
If manual test resistor connection method is used, then leakage test can be performed, but measurement precision deteriorates due to difficulty in observing tripping status
Solution Approach 1:
The patent employs an indication component that uses visual signals (such as color changes or illumination) to clearly display the tripping status of the leakage protection device. This visual indication system provides unambiguous feedback on test results, eliminating the difficulty of observing tripping status in magnetic starters without displays.
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 enhances safety, convenience, and efficiency by allowing remote or networked testing without on-site gas inspectors, reducing time and risk, and providing clear indication of test success through monitoring systems.
Implementation Method 1
controlling the leakage test device to be grounded to produce grounding current passing through the coal mine power line
Data Source
AI summary
Provided are a method and apparatus for remote coal mine leakage test. The remote leakage test method comprising: installing and connecting a leakage test device (3) at the a control switch (2) located at the most distal end of a coal mine power line (5); a leakage detection and protection device (1) connecting the leakage test device (3) via the coal mine power line (5) and providing it with a detection circuit for detecting whether remote leakage has occurred; generating a grounding current flowing through the coal mine power line (5) by controlling the grounding of the leakage test device (3); the leakage detection and protection device (1) detecting the grounding current, and enabling a leakage protection relay (KA) to operate, so as to cut off the coal mine power line (5); and detecting the coal mine power line (5) or manually observing an indication lamp (HL), so as to determine whether the remote leakage test is successful. The coal mine remote leakage test device and method are safe, convenient and time-saving.