Insulating System Line for Earth Drilling Device Safety
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Solution Overview
Problem
Earth drilling devices, particularly earth rockets, risk endangering operators when they encounter current-conducting underground cables due to the potential for electric shock, as the devices and their metal components can conduct electricity.
Innovation Solution
An electrically insulating system line is implemented, extending from the earth drilling device to the start region, with at least the rear section being insulated from the front section, using insulating adapters or materials like ceramic composites to prevent current transmission, allowing the system line to remain made of metal while maintaining safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal components (tensioning elements, adapters) are used in the earth drilling device, then mechanical strength and cost-effectiveness are improved, but electrical conductivity increases causing safety hazards when hitting underground cables
Solution Approach 1:
An electrically insulating system line acts as an intermediary between the metal earth drilling device and the start region. This system line includes insulating adapters that connect to metal components while preventing electrical current transmission, thus maintaining mechanical functionality while eliminating electrical conductivity hazards
Solution Approach 2:
The system line employs composite construction combining metal components (for mechanical strength) with electrically insulating materials (such as ceramic coatings or hydrophobic coatings). This composite approach allows the tensioning elements and adapters to maintain their mechanical properties while preventing electrical conduction to the operator
2Object-affected harmful factors
If the entire system line is made electrically insulating, then operator safety is improved, but mechanical strength and cost-effectiveness of metal components deteriorate
Solution Approach 1:
The system line is segmented into multiple components: metal earth drilling device, insulating adapters, and insulating system line sections. Only specific segments (the adapters and connection elements) are made electrically insulating, while the main structural components can remain metal, thus balancing safety requirements with manufacturing cost-effectiveness
Solution Approach 2:
Electrically insulating properties are applied locally at critical connection points (adapters and system line interfaces) rather than throughout the entire system. This localized application of insulation provides sufficient operator protection while minimizing the use of expensive insulating materials and maintaining cost-effectiveness
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 effectively prevents operator danger from electric shock by ensuring no voltage is applied to the system line when encountering current-carrying cables, while keeping costs low by using existing metal components with integrated insulating elements.
Implementation Method 1
at least a rear section (i.e., the section extending into the start shaft) of the at least one system line is electrically insulated from at least one front section of the earth drilling device
Implementation Method 2
using materials like ceramic or hydrophobic coatings to maintain mechanical strength and reduce electrical conduction
Data Source
AI summary
The invention relates to an earth drilling device (1) for boring a borehole into the soil and/or for drawing a line (9) into an underground passage, comprising at least one system line (4, 6) extending from the earth drilling device to a start region, wherein the system line is designed in an electrically insulating manner.