Hydro Demolition Unit With Remote Control And Vacuum Debris Removal
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Solution Overview
Problem
Current concrete removal methods, such as pneumatic jack hammers, are inefficient and prone to damaging rebar and causing stress fractures, leading to increased repair areas and dust contamination, while lacking a self-propelled mobile vehicle capable of ultra-high pressure concrete removal.
Innovation Solution
A mobile vehicle system employing a rotating nozzle water jet and polycrystalline diamond cutting teeth, controlled by an encoder and PLC for precise depth adjustment, with a vacuum system for debris removal and a remote control for real-time parameter adjustments, allowing for efficient concrete removal without damaging rebar and reducing dust pollution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pneumatic jack hammer is used for concrete removal, then concrete can be removed, but rebar is damaged and stress fractures are caused
Solution Approach 1:
The patent replaces the mechanical impact system (jack hammer) with an ultra-high pressure water jet system. The water jet cuts through concrete using hydraulic pressure (20,000-60,000 psi) rather than mechanical impact, eliminating the damaging vibrations and forces that cause rebar damage and stress fractures while maintaining effective concrete removal capability
Solution Approach 2:
The patent employs ultra-high pressure hydraulic water jets to remove concrete. The system uses a high-pressure pump to generate water pressure between 20,000-60,000 psi, which is delivered through a rotating nozzle to cut and remove concrete efficiently without the mechanical contact and vibration problems of traditional jack hammers
2Productivity
If jack hammer is used for concrete removal, then concrete is removed quickly, but dust and chips are produced requiring secondary cleanup
Solution Approach 1:
The patent converts the harmful byproduct (cement dust and chips) into a beneficial outcome by using the ultra-high pressure water jet to suppress dust generation during concrete removal. The water jet cuts concrete into fine slurry rather than producing dry chips, and the same water flow carries away dust particles, eliminating the need for secondary cleanup operations
Solution Approach 2:
The patent changes the physical state of concrete debris from solid chips and dust (dry phase) to a slurry mixture (wet phase) through the application of ultra-high pressure water. This phase transition occurs during the cutting process where water mixes with concrete particles, creating a removable slurry that can be easily evacuated without secondary cleanup
3Productivity
If water is directed at concrete at high pressure, then concrete can be removed, but water and debris settle back creating reconstituted material
Solution Approach 1:
The patent merges the concrete removal function with the debris evacuation function by integrating a vacuum system with the ultra-high pressure water jet system. The vacuum system with cyclone separator and collection container is combined with the water jet cutting system, allowing simultaneous concrete removal and debris evacuation, preventing the water-debris mixture from settling and reconstituting
Solution Approach 2:
The patent ensures continuous removal of water and debris during the concrete cutting process. The vacuum system operates continuously alongside the ultra-high pressure water jet, maintaining constant evacuation of the water-debris slurry. This continuous action prevents the slurry from settling and reconstituting, ensuring the removal process remains effective throughout 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 rapid and efficient concrete removal to a precise depth, minimizing damage to rebar and adjacent concrete, while capturing debris and dust, enhancing visibility and facilitating better bonding of new concrete with the existing rebar.
Implementation Method 1
ultra high pressure water jet for removal of concrete
Implementation Method 2
rotating nozzle water jet for removal of concrete
Implementation Method 3
Adjacent polycrystalline diamond cutting teeth may also be employed for efficiency in concrete demolition
Implementation Method 4
The efficiency of the vacuum system works in combination with the telescoping shroud which is highly effective in removal of water and debris
Data Source
AI summary
A mobile vehicle mounted hydro demolition system comprising ultra-high pressurized water through a rotating nozzle water jet for cutting concrete, including a water supply, a vacuum blower, and a vacuum container that has offset with a dewatering bag so that incoming water can be pumped off as wastewater. A remote control gives an operator immediate adjustments of the rotational speed of the nozzle; the transverse traversing speed of the nozzle; the forward advancement of the vehicle; the number of traverses the head traverses before the vehicle advances its predetermined step; the pressure of the high-pressure pump; the amount of vacuum cfm's the blowers are producing; the steering of the vehicle; and the traversing distance of the rotating nozzle. By manipulating the above parameters the depth of removal is predictable and provides a consistent depth.