Jet Nozzle Quality Determination via Pressure Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is no effective method to determine the quality of a jet nozzle before it is used in large diameter jet grouting, leading to potential shortening of the jet stream's ground penetrating distance due to the inability to identify defective nozzles that do not uniformly distribute pressure.
Innovation Solution
A determining device and method using a pressure sensing unit and controlling device to calculate pressure distribution, penetration area, and pressure center coordinates, determining the nozzle's quality by set ratios and thresholds, distinguishing between non-defective and defective products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensitive paper is used to examine jet stream, then it is possible to determine whether a jet nozzle is good or defective, but it is not possible to identify the point of time at which the prescribed pressure was applied, leading to false determination of defective nozzles
Solution Approach 1:
The patent replaces the mechanical pressure sensitive paper method with a digital pressure sensor system. The pressure sensor (2) electronically measures pressure values and transmits them to a control unit (10), which stores and analyzes the data. This substitution enables precise temporal identification of pressure application moments through digital timestamping, while maintaining accurate pressure measurement capabilities, thereby resolving the contradiction between measurement precision and determination reliability.
Solution Approach 2:
The patent introduces a control unit (10) as an intermediary between the pressure sensor (2) and the analysis system. The control unit receives pressure values from the sensor, stores them with temporal information, and processes the data to determine nozzle quality. This intermediary enables both precise pressure measurement and accurate timing identification, eliminating the limitation of pressure sensitive paper that cannot record when pressure was applied.
2Ease of manufacture
If a jet nozzle is inspected using prior art methods, then some quality assessment is possible, but defective nozzles that do not uniformly distribute pressure cannot be identified, causing shortening of jet stream ground penetrating distance
Solution Approach 1:
The patent segments the pressure measurement process into multiple discrete pressure values measured at different time points (frames). The control unit stores each pressure value with its temporal information, allowing analysis of pressure distribution uniformity over time. This segmentation enables identification of defective nozzles that fail to maintain uniform pressure distribution, while keeping the inspection process simple through automated digital measurement and analysis.
Solution Approach 2:
The patent implements a feedback mechanism where the control unit (10) continuously receives pressure values from the sensor (2), compares them against predetermined thresholds, and provides feedback on nozzle quality. The system determines whether pressure values meet required standards and identifies defective nozzles that do not uniformly distribute pressure, ensuring reliable jet stream performance while maintaining simple automated inspection procedures.
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 accurate determination of nozzle quality by analyzing pressure distribution and penetration characteristics, ensuring the jet stream can penetrate the ground effectively and uniformly, thus preventing premature nozzle failure and ensuring construction quality.
Implementation Method 1
a pressure sensing unit (2) with which a jet stream (J) ejected from the jet stream generating device (1) collides
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The purpose of the present invention is to provide a determining device and a determining method to determine whether an inspected jet nozzle is defective by inspecting the jet nozzle for injecting a jet stream with long ground penetrating distance at a stage before installing in a construction site where a large diameter jet grouting method is used. To achieve this purpose, with this invention, in which a nozzle to be inspected is mounted onto an outlet port, a jet stream is ejected from a jet stream generating device, and measurement data measured by a pressure sensing unit when the jet stream impacts the pressure sensing unit is processed with a controlling device (for example, a computer), a nozzle to be inspected is determined to be a non-defective product if a first ratio is no less than a first prescribed value, a second ratio is no less than a second prescribed value, and a third ratio is no less than a third prescribed value.