Vertical Tunneling Positioning with Vibration-Isolated Sensors
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Solution Overview
Problem
Existing vertical tunneling devices for high-level radioactive waste disposal suffer from reduced operating reliability and accuracy due to intense vibrations, affecting sensor accuracy and control stability, and require improved anti-vibration performance.
Innovation Solution
A vertical tunneling system with a main operation device, pipe joint conveying unit, vibration prevention unit, positioning and external bracing system, guide system, and slag discharging system, which includes propulsion cylinders, guide rods, vibration prevention mechanisms, and laser ranging devices to enhance stability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If high-accuracy sensors are equipped in the vertical tunneling device to realize automatic operation, then the automation level is improved, but the operating reliability is reduced due to vibration affecting sensor accuracy
Solution Approach 1:
The patent extracts the sensor system from the vibrating main body by installing sensors on the pipe joint transfer vehicle, which is decoupled from the vibration source. This separation allows the sensors to measure position accurately without being affected by the intense vibrations generated during cutter head rotation, thus maintaining both automation and reliability.
Solution Approach 2:
The pipe joint transfer vehicle acts as an intermediary carrier between the vibrating main body and the sensor system. It provides a stable platform for mounting sensors while transferring position data to the control system, enabling automatic operation without direct exposure to vibration-induced measurement errors.
2Manufacturing precision
If the vertical tunneling device is designed with high anti-vibration performance to control tunneling accuracy, then the tunneling accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent segments the tunneling system into distinct functional modules: the main operation device for vertical movement, the pipe joint transfer vehicle for position transfer, and the sensor system for measurement. Each module operates independently with its own vibration isolation, avoiding the need for a complex centralized anti-vibration system while maintaining high tunneling accuracy.
Solution Approach 2:
Instead of implementing high anti-vibration performance throughout the entire device, the patent applies vibration isolation only locally at critical measurement points on the pipe joint transfer vehicle. This targeted approach reduces overall device complexity while ensuring tunneling accuracy is maintained where it matters most.
3Productivity
If the cutter head rotates at high speed to improve tunneling efficiency, then the productivity is improved, but the vibration intensity increases affecting sensor accuracy
Solution Approach 1:
The patent extracts the sensor system from the high-speed rotating cutter head assembly by mounting sensors on the separate pipe joint transfer vehicle. This allows the cutter head to operate at high speeds for improved productivity while the sensors remain on a vibration-isolated platform, maintaining measurement precision despite the intense vibrations generated during high-speed cutting.
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 system improves operating reliability by reducing sensor dependency, enhances tunneling accuracy through precise positioning, and stabilizes the device against vibrations, ensuring stable and accurate vertical tunneling operations.
Implementation Method 1
the propulsion cylinders press and lift the tunneling head, and press and lift pipe joints coaxially stacked one by one above the tunneling head through the propulsion pressure plates
Implementation Method 2
an intense vibration is generated, resulting in an intense vibration of a main body of the vertical tunneling device
Implementation Method 3
the guide system includes two laser ranging devices fixed on the frame and two laser targets fixed on the top end of the tunneling head
Implementation Method 4
all the guide rods are arranged in parallel with each other, the number of the propulsion cylinders is two, the propulsion cylinders are fixedly connected with the frame, and the propulsion pressure plates are each slidably sleeved on one of the guide rods
Data Source
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AI summary
The present disclosure provides a vertical tunneling system, and relates to the technical field of pit construction equipment in tunnels. The vertical tunneling system comprises a main operation device and a pipe joint conveying unit. The main operation device can move and be positioned at a certain position in a tunnel, and tunnels vertically downward. The main operation device comprises a frame, a propulsion system, a tunneling head, a pipe joint transfer table and a pipe joint transfer vehicle. The propulsion system comprises propulsion cylinders, propulsion pressure plates and at least four guide rods. The pipe joint transfer table is fixedly arranged on the frame, and the pipe joint transfer vehicle is in sliding fit with the pipe joint transfer table and can be positioned directly above a tunneling hole. The pipe joint conveying unit comprises a transport vehicle, a movable hoisting frame, a transition frame and a plurality of pipe joints stored on the transport vehicle, and horizontal third guide rails perpendicular to the second guide rails are fixed on the transition frame. A sliding seat is in sliding fit with the third guide rails, a hoisting cylinder is fixed on the sliding seat, and a free end of a piston rod of the hoisting cylinder is used for hoisting the pipe joints. The tunneling accuracy of the vertical tunneling system is increased.