Screen Nozzle With Internal Threaded Rod
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Solution Overview
Problem
Existing screen nozzles made of stainless steel tend to bind to steel plates, making them difficult to remove and prone to damage from corrosive materials and acid cleaning, with external welds being a weak point for corrosion and deformation, and the welding process can block or distort the screen apertures.
Innovation Solution
A screen nozzle design featuring a cylindrical screen element sandwiched between top and bottom covers, secured by a threaded rod extending through the interior, eliminating external welds and allowing for easier replacement without removing the nozzle from the plate, with the nipple secured by swaging and the rod optionally welded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nozzle and plate are both made of stainless steel for corrosion resistance, then corrosion resistance is improved, but the nozzle binds to the plate and becomes difficult to remove
Solution Approach 1:
The invention divides the nozzle into two separate parts: a removable screen element and a fixed nipple. The screen element can be detached and replaced independently without removing the entire nozzle assembly from the plate, thus maintaining corrosion resistance while improving ease of maintenance.
Solution Approach 2:
The invention introduces a dynamic aspect to the previously static nozzle assembly. The screen element is designed to be movable and replaceable, allowing the system to transition between states of having the screen installed and having it removed for cleaning or replacement, while the nipple remains fixed to maintain the connection to the plate.
2Strength
If external welds are used to attach the screen, then structural strength is improved, but the welds become weak points for corrosion and can damage or deform the screen
Solution Approach 1:
The invention extracts the harmful welding operation from the attachment process. Instead of welding the screen element to the nipple, the screen element is retained by a retention mechanism (such as a retention ring or夹持 structure) that holds it in place without creating vulnerable weld joints on the screen surface.
Solution Approach 2:
The invention introduces a retention mechanism as an intermediary between the screen element and the nipple. This retention ring or clamping structure serves as a mediator that provides structural strength and secure attachment without requiring direct welding to the screen, thus eliminating the corrosion-prone weld points on the screen surface.
3Strength
If welding is used to attach the screen to the nipple, then attachment strength is improved, but the welding process can block or distort the screen apertures
Solution Approach 1:
The invention extracts the welding process from the attachment method. The screen element is attached to the nipple through mechanical retention rather than welding, completely eliminating the risk of weld-induced aperture blockage or distortion while maintaining secure attachment.
Solution Approach 2:
The retention mechanism acts as an intermediary that provides attachment strength without involving thermal processes. The retention ring or clamping structure mechanically secures the screen element to the nipple through friction and geometric interlocking, avoiding any heat-affected zone that could distort the screen apertures.
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 design prevents damage from corrosive materials, reduces corrosion risks, and simplifies the replacement and maintenance of screen nozzles by eliminating external welds and allowing for easy removal of the screen element without disturbing the nozzle's attachment to the plate.
Implementation Method 1
the top cover is secured to the bottom cover by means of a threaded rod extending from either the bottom cover or the nipple through the interior of the screen through an aperture in the top cover with the top cover being retained by a nut or the like
Implementation Method 2
the nipple is secured to the bottom cover by swaging
Data Source
AI summary
A screen nozzle for a media retention screen is disclosed which includes a nipple, a bottom cover, a top cover, and a cylindrical screen element sandwiched between the top and bottom covers. The top cover is secured to the bottom cover by means of a threaded rod extending from either the bottom cover or the nipple through the interior of the screen through an aperture in the top cover with the top cover being retained in place by a nut or the like. The nipple is secured to the bottom cover by swaging and the threaded rod is welded to the bottom cover. Assembling the screen element using an internal threaded rod has two substantial advantages over existing screen nozzles. The first advantage is that there are no external welds which may damage or deform or foul the screen and which are also are potential areas of weaknesses which may be subject to corrosion. Secondly the screen element may be replaced without removing the nozzle from the screen plate. This makes repair and replacement of the screen nozzles considerably easier and also cheaper, since the nipple itself does not need to be replaced.