Reinforced rubber liner for centrifugal pump casings

Claim 2

In a replaceable rubber lining for a centrifugal pump casing, said lining having a volute section and a discharge nozzle mounted on said volute section, the improvement comprising: semi-cylindrical reinforcement means for reinforcing a discharge nozzle of said lining, said semi-cylindrical reinforcement means including a thermosetting resin impregnated fabric mesh which is adhesively bonded to the external surface of that portion of said lining defining said discharge nozzle of said lining; semi-arch reinforcement means for reinforcing a region of said lining volute section which is proximate the mounting of said discharge nozzle on said volute section, said semi-arch reinforcement means including a thermosetting resin impregnated fabric mesh which is adhesively bonded to the external surface of that portion of the lining defining the volute section proximate said mounting of said discharge nozzle to said volute.

Claim 3

The improvement according to claim 1 wherein said fabric mesh is composed of multiple plys of a resin impregnated fabric.

Claim 4

The rubber lining of claim 2 wherein a ply of resin impregnated fabric comprises a loose fabric mesh of nylon filaments impregnated with a phenolic resin.

Claim 5

A replaceable half-shell, bowl-shaped, elastomeric, lining for a centrifugal pump casing, said lining comprising a layer of elastomeric material and a resin impregnated mesh-like, substantially rigid reinforcement fabric adhesively bonded to said elastomeric layer, said lining defining a fluid flow path, said lining having a split cylinder discharge nozzle mounted on said bowl shaped lining, said bowl lining being divided into four quadrants: a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant, said first quadrant being contiguous said mounting of said discharge nozzle on said bowl lining, said second quadrant being contiguous said first quadrant, wherein fluid within said fluid flow path passes through said second quadrant immediately prior to its passage through said first quadrant and then exits through said dishcarge nozzle, said reinforcement fabrics, in half-cylinder form, being mounted on said discharge nozzle and on said bowl lining in said first and second quadrants of said bowl lining, wherein a cross-sectional thickness of said lining is constituted by said elastomeric layer except in those regions having reinforcement fabrics bonded thereto said cross-sectional thickness in said regions being constituted by said elastomeric layer and said reinforcement fabrics.

Claim 6

A replaceable half-shell, bowl-shaped, elastomeric, lining for a centrifugal pump casing, said lining comprising a layer of elastomeric material and a resin impregnated mesh-like, substantially rigid reinforcement fabric adhesively bonded to said elastomeric layer, said lining defining a fluid flow path, said lining having a split cylinder discharge nozzle mounted on said bowl shaped lining, said bowl lining being divided into four quadrants: a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant, said first quadrant being contiguous said mounting of said discharge nozzle on said bowl lining, said second quadrant being contiguous said first quadrant, wherein fluid within said fluid flow path passes through said second quadrant immediately prior to its passage through said first quadrant and then exits through said dishcarge nozzle, said reinforcement fabrics, in half-cylinder form, being mounted on said discharge nozzle and on said bowl lining in said first and second quadrants of said bowl lining, wherein a cross-sectional thickness of said lining is constituted by said elastomeric layer except in those regions having reinforcement fabrics bonded thereto said cross-sectional thickness in said regions being constituted by said elastomeric layer and said reinforcement fabrics.

Claim 7

The lining of claim 4, wherein said lining defines a curved sidewall, said reinforcement fabrics being adhesively bonded to said curved sidewall of said elastomeric liner.

Claim 8

The lining of claim 4, wherein each of said reinforcement fabrics consist of multiple plys of said resin impregnated fabric mesh.

Claim 9

The lining of claim 4, wherein said reinforcing fabric mesh forms substantially the outer surface of said lining in those regions in which said reinforcement fabrics is present.

Claim 10

The lining of claim 4, wherein said fabric is a nylon material.

Claim 11

The lining of claim 4, wherein said resin is a thermosetting phenolic resin.