Screening Machine for Superfine Powder with Rotary Air Spray
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Solution Overview
Problem
Current screening machines for superfine powder face issues such as mesh screen clogging due to micron-size materials, limited screen area, complex structure, high energy consumption, and unsuitability for large-scale production, especially with mixed powders having varying specific gravity components.
Innovation Solution
A screening machine design featuring a screen drum with rotary air spray pipes arranged outside to generate uniform airflow, preventing caking on the mesh screen, increasing the screen area, reducing energy consumption, and simplifying the structure for easy maintenance and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If air screening method is used for powder classification, then separation effectiveness is improved, but mesh screen clogging occurs due to accumulation of micron-size materials
Solution Approach 1:
The patent applies preliminary action by introducing a air flow generation device that creates upward airflow before the powder reaches the mesh screen. This preliminary airflow prevents micron-size materials from accumulating and clogging the screen by continuously lifting and moving them through the separation chamber, thereby maintaining screen openness and preventing blockage during the screening process.
Solution Approach 2:
The patent uses air flow as an intermediary substance between the powder and the mesh screen. The air flow generated by the air flow generation device acts as a mediator that carries the powder through the separation chamber and prevents direct accumulation on the screen surface, enabling effective separation without mesh blockage.
2Measurement precision
If conventional air screening device with dual airflow circulation is used, then some separation is achieved, but screen area is limited and structure is complex
Solution Approach 1:
The patent extracts and simplifies the air flow generation function from complex dual airflow circulation systems. By using a single air flow generation device that directs air flow upward through the separation chamber, the patent eliminates the need for complicated dual airflow arrangements while maintaining effective separation capability and reducing structural complexity.
Solution Approach 2:
The patent makes the air flow generation device multi-functional by having it simultaneously create upward airflow for separation, prevent mesh clogging, and reduce overall device complexity. This single device performs multiple functions that would traditionally require separate systems, thereby simplifying the overall structure while maintaining separation effectiveness.
3Measurement precision
If conventional air screening device is used, then separation is performed, but energy consumption is high
Solution Approach 1:
The patent changes the parameters of air flow generation by using a more efficient air flow generation device that creates targeted upward airflow. This parameter change in air flow pattern and generation method reduces the energy required to maintain separation while keeping the separation effectiveness high, thereby lowering overall energy consumption compared to conventional dual airflow systems.
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 machine achieves high screening efficiency, prevents mesh clogging, supports large-scale industrial production of superfine powders, and reduces energy consumption by utilizing airflow for classification and drying, ensuring effective separation of particles up to 25 microns and beyond.
Implementation Method 1
The inner cavity of the casing is communicated with an external induced draft fan via the negative pressure chamber disposed on an upper part of the casing
Implementation Method 2
The rotary air spray pipe is arranged in a space between the screen drum and the casing. The rotary air spray pipe is substantially in the shape of a Chinese character 'men' having the meaning of 'door.' A middle part of the transverse pipe is connected via a transmission with the drive motor
Implementation Method 3
The blast pipe is arranged vertically in a middle part of the screen drum. The air outlet of the blast pipe passes through the screen drum and is connected to the middle part of the transverse pipe of the rotary air spray pipe
Implementation Method 4
The air outlet of the blast pipe is in rolling connection with the transverse pipe via a rolling bearing
Implementation Method 5
The feed pipe is arranged inside the screen drum. The feed outlet of the feed pipe is arranged beneath a buffering umbrella. The feed outlet of the feed pipe stretches outside the sidewall of the funnel
Data Source
AI summary
A screening machine for superfine powder. The screening machine includes a casing, a screen drum, a funnel, a negative pressure chamber, a rotary air spray pipe, a drive motor, a blast pipe, and a feed pipe. The screen drum is disposed in the middle part of the inner cavity of the casing. The funnel is disposed beneath the casing. The opening of the screen drum is arranged on the bottom of the screen drum and communicates with the upper opening of the funnel. The inner cavity of the casing communicates with the external induced draft fan via the negative pressure chamber disposed on the upper part of the casing. The rotary air spray pipe is arranged in the space between the screen drum and the casing. The middle part of the transverse pipe is connected via a transmission with the drive motor.