Inspection Chamber Gas Flow for Powder Retention
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Solution Overview
Problem
In batch production of pharmaceuticals and food products, the entire batch is discarded when a sample is found defective, leading to unnecessary waste, and continuous measurement of parameters like hardness and solubility is challenging due to retention of powder in inspection devices, which affects measurement precision and quality control.
Innovation Solution
A continuous production system with an inspection and screening device equipped with a cleansing mechanism that generates a spiral gas flow to prevent powder retention, using gas sprays at the entrance and exit gate valves to clear powder from the inspection chamber, ensuring thorough air flow and minimizing stagnation regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an inspection chamber with gate valves is used to detect quality defects, then quality control capability is improved, but powder retention occurs at the valves reducing measurement precision
Solution Approach 1:
The patent uses a gas spray mechanism to blow powder from the inspection chamber. Gas is sprayed from multiple nozzles positioned at the gate valve areas and chamber interior to create airflow that removes retained powder, preventing measurement interference while maintaining the inspection chamber structure
Solution Approach 2:
The patent introduces gas as an intermediary substance to mediate between the powder and the environment. The gas spray acts as a mediator that transfers momentum to the retained powder particles, enabling their removal without direct mechanical contact with the gate valves or chamber walls
2Ease of manufacture
If batch production with sampling inspection is used, then quality inspection is simplified, but entire batches are discarded when samples are defective causing material waste
Solution Approach 1:
The patent replaces manual sampling and batch-based quality control with continuous automated optical inspection. Sensors and cameras continuously monitor powder properties in real-time, enabling precise identification of defective portions without physical sampling, thereby eliminating the need to discard entire batches
Solution Approach 2:
The patent implements continuous quality inspection throughout the production process rather than intermittent batch sampling. The inspection chamber continuously analyzes powder flow, maintaining constant quality monitoring that enables immediate detection and separation of defective material, preventing waste of good material in the same batch
3Ease of operation
If gate valves are installed in the inspection chamber for powder discharge control, then powder flow control is improved, but powder adhesion to valves increases retention
Solution Approach 1:
The patent uses gas spray nozzles positioned near the gate valves to create airflow that prevents powder adhesion. The gas flow creates a protective air barrier and applies shear force to prevent powder from adhering to the valve surfaces, maintaining valve functionality while eliminating retention
Solution Approach 2:
The patent implements periodic gas spraying cycles to clear powder from the gate valves. Gas spray is activated at specific intervals or triggered by sensors detecting powder accumulation, providing periodic cleaning action that prevents adhesion buildup while allowing the valves to maintain their flow control function
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 configuration maximally suppresses powder retention in the inspection device, allowing for precise quality control and efficient discharge of defective products, reducing waste and maintaining high measurement precision.
Implementation Method 1
sprays gas from an entrance-side opening formed on an inner face of the path in a direction forming a spiral flow following the inner face of the path
Data Source
Figure 1
Figure 2
Figure 3(A)~3(D)
AI summary
The present invention addresses the problem of providing technology to limit, as much as possible, powder remaining in a device for powder testing provided in the middle of a system to continuously produce a product from a raw material powder. This continuous production system to continuously produce a product from a raw material powder comprises: a first processing device that performs a first process on the raw material powder; a second processing device that performs a second process on the powder on which the first process has been performed by the first processing device; and a test and selection device that has a test chamber through which the powder being sent from the first processing device to the second processing device passes. The test and selection device has a cleaning mechanism that blows gas from an inlet side opening formed in the inner face of a channel connected to the test chamber from the first processing device on the downstream side of an inlet side gate valve for opening and closing the channel toward a direction to form a swirling flow along the inner face of the channel.