Suction strainer with an internal core tube

A suction strainer for connection to a suction pipe of a pump, said suction strainer comprising:

• a core tube including a core wall having a plurality of spaced flow openings defined therein and passing therethrough, said core tube defining a core chamber and having at least one open end;
• an exterior screening structure defining a plurality of spaced perforations, said exterior screening structure extending at least partially about the core wall of said core tube;
• and
• a plurality of spaced structural members extending radially from and being angularly displaced along the core wall of said core tube, said structural members being disposed between said core tube and said exterior screening structure and being constructed and arranged to support said exterior screening structure on said core tube.

A suction strainer for connection to a suction pipe of a pump to remove solids from liquid drawn through said suction strainer by the pump, said suction strainer comprising:

• an elongated core tube having a plurality of spaced flow openings passing therethrough and defining a core chamber therein, said core tube having at least one open end;
• an exterior screening structure extending along and at least partially about said core tube, said exterior screening structure including a plurality of perforated screening surfaces and defining a screening chamber between said plurality of screening surfaces and said core tube;
• and
• a plurality of structural members radially arrayed on said core tube and extending through the screening chamber to support said exterior screening structure on said core tube.

A suction strainer for connection to a suction pipe of a pump, said suction strainer comprising:

• a core tube including an elongated core wall having a plurality of spaced flow openings that extend through said core wall and define open areas in said wall, said core tube defining a core chamber and having a first end and a second end;
• said core wall further defining a plurality of core units of substantially equal length and extending sequentially along the length of said core tube, wherein each unit of said plurality of core units defines a unit open area, wherein said unit open area of an individual unit of said plurality of core units is equal to the sum of said open areas within said individual unit, and wherein a first unit of said plurality of core units defines a first unit open area and a second unit of said plurality of core units that is interposed between said first unit and said first end defines a second unit open area, wherein said first unit open area is greater than said second unit open area;
• and
• an exterior screening structure defining a plurality of spaced perforations, said exterior screening structure extending at least partially about the core wall of said core tube, said exterior screening structure including at least two plate walls extending radially from and connected to the core wall of said core tube to support said exterior screening structure on said core tube.

A suction strainer for connection to a suction pipe of a pump, said suction strainer comprising:

• a core tube including a core wall having a plurality of spaced flow openings that extend through said core wall and define open areas in said wall, said core tube defining a core chamber having a first end and a second end;
• said core wall further defining a plurality of core units of substantially equal length and extending sequentially along the length of said core tube, wherein each unit of said plurality of core units defines a unit open area, wherein said unit open area of an individual unit of said plurality of core units is equal to the sum of said open areas within said individual unit, and wherein a first unit of said plurality of core units defines a first unit open area and a second unit of said plurality of core units that is interposed between said first unit and said first end defines a second unit open area, wherein said first unit open area is greater than said second unit open area;
• and
• an exterior screening structure including a plurality of plate assemblies spaced axially along said core tube, each plate assembly of said plurality defining a plurality of spaced perforations and extending at least partially about the core wall of said core tube, at least two plate assemblies of said plurality of plate assemblies including a plate wall rigidly connected to the core wall of said core tube to support said plurality of plate assemblies on said core tube.