Trench Cutter Switchover Mechanism for Cutting Wheel Flushing
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Solution Overview
Problem
Trench cutters face significant efficiency issues when cutting in cohesive soils like clay, as adhering soil material clogs the cutting wheels, requiring frequent mechanical cleaning, which is time-consuming and economically detrimental due to the depth of cut trenches.
Innovation Solution
A trench cutter with a switchover mechanism that reverses the discharge pump's direction to flush cutting wheels with a fluid flow, using the discharge means to clear adhering soil material, and optional additional pumps and flushing outlets for enhanced cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the trench cutter operates in cohesive soils, then cutting performance is achieved, but cutting wheels become clogged with adhering soil material
Solution Approach 1:
The patent extracts the harmful adhering soil material from the cutting wheels by introducing a flushing fluid that removes the clogged material. The discharge pump creates a fluid flow that extracts the adhering soil from the cutting teeth surfaces, separating the cutting function from the clogging problem.
Solution Approach 2:
The patent introduces a flushing fluid as an intermediary substance between the cutting wheels and the adhering soil material. This fluid acts as a mediator that facilitates the removal of clogged material by creating a flow that carries the soil away from the cutting wheels, enabling continuous operation without mechanical cleaning.
2Reliability
If mechanical cleaning of cutting wheels is performed, then adhering soil material is removed, but operational time is lost
Solution Approach 1:
The patent enables continuous cutting operation by implementing an automated flushing system that continuously removes adhering soil material during the cutting process. The discharge pump operates continuously to maintain cutting wheel cleanliness, eliminating the need to stop operations for mechanical cleaning and thus maintaining continuous productive action.
Solution Approach 2:
The cutting system performs self-cleaning through the automated flushing mechanism. The discharge pump and fluid delivery system automatically remove adhering soil material from the cutting wheels without requiring external mechanical cleaning intervention, allowing the system to maintain itself during operation.
3Productivity
If discharge pump is used for suction operation, then cut-off soil material is removed, but flushing capability is not available
Solution Approach 1:
The patent implements a dynamic discharge pump system that can switch between different operational modes - suction operation for removing cut-off soil material and flushing operation for cleaning cutting wheels. The pump's operational characteristics are dynamically adjusted based on the required function, enabling versatile performance across different operational needs.
Solution Approach 2:
The discharge pump is designed to perform multiple functions: it can operate in suction mode to remove cut-off soil material from the trench and in flushing mode to clean the cutting wheels by creating fluid flow. This multi-functionality eliminates the need for separate systems and enhances the overall versatility of the trench cutter.
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 solution allows for efficient and reliable flushing of cutting wheels, reducing downtime and maintaining high daily performance by effectively removing adhering soil material without altering the trench cutter's construction, thus enhancing operational efficiency.
Implementation Method 1
a fluid flow generated by at least one discharge pump of the discharge means is generated onto at least one cutting wheel for flushing out the cutting wheel
Data Source
AI summary
The invention relates to a trench cutter for producing a cut trench in the soil with a cutter frame, at least one pair of cutting wheels which are supported and driven in a rotatable manner on a lower end of the cutter frame, wherein each cutting wheel has a plurality of cutting teeth along its external circumference, and a discharge means with at least one discharge pump for discharging a cutting fluid from the cut trench in the region of the cutting wheels. According to the invention a switchover means is provided which is designed for switching the discharge means over to a flushing operation, in which a fluid flow generated by at least one discharge pump of the discharge means is generated onto at least one cutting wheel for flushing out the cutting wheel.