Compact Strainer Layout for Low Pressure Loss Cleaning
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Solution Overview
Problem
The existing Y-type strainers have a protruding screen accommodation portion that increases their size, leading to higher flow resistance and pressure loss, and require a large maintenance space for cleaning, which can cause screen deformation and foreign substance leakage.
Innovation Solution
A compact strainer design with a tubular casing where the inlet and outlet are connected to the piping, a barrier divides the channel vertically to form a filter portion with laterally opposing screens, and upper and lower lids allow for easy cleaning without removing the screens, reducing pressure loss and maintenance space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the screen accommodation portion protrudes obliquely downward to increase the screen capacity, then the strainer can accommodate a larger screen, but the total size of the strainer increases and the flow resistance increases
Solution Approach 1:
The invention changes the screen accommodation orientation from oblique downward protrusion to horizontal arrangement within the casing. The screen is positioned horizontally between the inlet and outlet, utilizing the radial dimension of the cylindrical casing rather than extending axially, thereby maintaining compact size while accommodating sufficient screen area.
Solution Approach 2:
The screen is nested within the cylindrical casing in a space-efficient manner, fitting the screening element inside the existing flow path volume without requiring external protrusions. The screen occupies the internal radial space of the casing, maximizing utilization of available volume.
2Ease of manufacture
If the channel between inlet and outlet is bent downward to accommodate the screen, then the screen can be installed, but the flow path becomes non-linear and pressure loss increases
Solution Approach 1:
The flow path maintains its linear axial direction from inlet to outlet, while the screen is installed in the radial dimension perpendicular to the flow direction. This separation of flow path orientation and screen installation orientation eliminates the need to bend the channel, keeping the flow path straight and minimizing pressure loss.
3Ease of operation
If the lower end opening portion is used for screen removal, then the screen can be accessed, but a large maintenance space must be secured on the extended axis
Solution Approach 1:
The screen is extracted from the vertical axial position and repositioned horizontally within the casing. The upper end of the screen extends toward the outlet side, allowing access through the outlet opening rather than requiring removal through the lower end, thereby reducing the required maintenance space to minimal clearance around the outlet.
4Area of stationary object
If the strainer size is reduced to minimize maintenance space, then less space is required, but the screen capacity may be insufficient
Solution Approach 1:
The screen capacity is maximized by utilizing the radial dimension of the cylindrical casing rather than extending axially. The screen spans the radial width of the casing, providing sufficient screening area within the compact axial length, thereby maintaining small overall strainer size while ensuring adequate screen capacity.
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 design reduces the strainer's size, minimizes pressure loss, and facilitates easy maintenance without the need for a wide maintenance space, preventing screen deformation and foreign substance leakage, while also reducing material costs and installation complexity.
Implementation Method 1
a barrier that divides in two a linear channel between the inlet and the outlet is provided on an outlet side vertically throughout in the casing so as to face the inlet
Implementation Method 2
a filter portion surrounding the inlet is constituted by the barrier, a pair of screens laterally opposing each other arranged at a predetermined interval
Data Source
AI summary
A compact strainer having a small pressure loss which is easily cleaned without inserting and detaching screens in and from a strainer casing. Front and rear end portions of a tubular casing are respectively provided with an inlet and an outlet. A barrier divides in two a linear channel between the inlet and the outlet along a flowing direction and is provided on the outlet side so as to face the inlet. A filter portion surrounding the inlet is constituted by the barrier, a pair of screens laterally opposing each other and arranged at a predetermined interval are provided, and the upper and lower portions of an inner surface of an outer wall of the casing, and upper and lower regions of the outer wall are provided with opening portions with lids which make the inside of the filter portion communicate with the outside.