In-Line Strainer Screen Orientation and Swirling Protrusion
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Solution Overview
Problem
In existing strainers, solid foreign matter tends to adhere to the spiral plate, obstructing fluid flow and accumulating concentratedly on the upper half of the screen, leading to potential clogging and noise issues.
Innovation Solution
The in-line strainer design features a screen oriented with its introduction port facing a through-hole between primary and secondary flow path chambers, allowing liquid to flow downward through the filter cylinder, preventing concentrated adhesion and accumulation of solid foreign matter, and includes a swirling protrusion on the cylinder wall to maintain uniform flow resistance and reduce pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spiral plate is provided inside the screen to enable filtration over the entire filter net, then filtration efficiency is improved, but solid foreign matter adheres to the spiral plate causing flow obstruction and concentrated accumulation on the upper half of the screen
Solution Approach 1:
The invention removes the spiral plate from inside the screen and relocates it to the outer peripheral surface of the housing. This extraction eliminates the harmful effect of solid foreign matter adhering to the spiral plate while preserving the swirling flow function. The spiral plate now serves only to generate rotational flow without being in the direct path of filtered liquid, thus preventing accumulation and flow obstruction.
Solution Approach 2:
The invention introduces an inclined plate as an intermediary element between the spiral plate and the screen. The inclined plate is positioned at the lower end of the screen and directs liquid flow away from the spiral plate, preventing solid foreign matter from adhering to the spiral plate while maintaining the swirling flow effect for comprehensive filtration.
2Reliability
If the screen is oriented with introduction port facing the through-hole and outflow port facing the lower half, then liquid flows downward through the filter cylinder preventing concentrated adhesion, but the structural configuration becomes more complex
Solution Approach 1:
The invention employs asymmetric orientation of the screen within the housing. The introduction port of the screen faces the through-hole in the housing bottom, while the outflow port faces the lower half of the housing. This asymmetric arrangement creates a downward flow pattern that prevents solid foreign matter from accumulating on the upper half of the screen, while the complexity is managed through straightforward structural integration.
3Speed
If the spiral plate is positioned inside the screen, then fluid control and swirling flow are achieved, but pressure loss increases due to flow obstruction by adhered solid foreign matter
Solution Approach 1:
By extracting the spiral plate from inside the screen and positioning it on the outer peripheral surface of the housing, the invention eliminates the source of flow obstruction. Solid foreign matter can no longer adhere to the spiral plate and block the flow path, thereby maintaining smooth fluid flow and reducing pressure loss while preserving the beneficial swirling flow effect for enhanced filtration.
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 effectively prevents solid foreign matter from accumulating on the screen, ensuring smooth fluid flow, reducing pressure loss, and preventing early clogging, thus prolonging maintenance cycles and maintaining operational efficiency.
Implementation Method 1
a swirling protrusion that slopes downward in a spiral shape is provided on the inner peripheral surface of the cylinder wall 24 that defines the secondary flow path chamber 40
Implementation Method 2
a screen 10 that is installed in the filter chamber 8 and filters the liquid flowing in through the inflow port 6
Data Source
AI summary
Provided is an in-line strainer capable of more reliably preventing the concentrated adhesion and accumulation of solid foreign matter or the like on a portion of a screen. In an in-line strainer according to the present invention, a housing 9 includes a cylinder wall 24 that is formed in a hollow cylindrical shape and extends in the vertical direction, and a top wall 25 that closes an upper end of the cylinder wall 24. The filter chamber 8 is divided into a primary flow path chamber 39 formed on the upper side and communicating with an inflow port 6 and a secondary flow path chamber 40 formed on the lower side and communicating with an outflow port 7, and a through-hole 38 is provided in an open manner between the two chambers 39 and 40. The screen 10 includes a filter cylinder 33 that is formed in a vertically long hollow cylindrical shape having openings at upper and lower ends, and a bottom lid 34 that closes the lower-end opening of the filter cylinder 33, and an introduction port 36 that allows introduction of liquid is formed at the upper end of the filter cylinder 33. The screen 10 is disposed in the filter chamber 8, in an orientation such that the introduction port 36 faces the through-hole 38, and the outflow port 7 is provided in an open manner in the cylinder wall 24 that faces the lower half of the filter cylinder 33.