WAER RING FOR A CONCRETE PUMP

• Main Authors: CAVANAUGH, JAMES, KLINGENSMITH, MARK, T, CONDON, GARY, J
• Format: Patent
• Language: English; French
• Published: 27.11.2003
• Edition: 7
• Subjects: BLASTING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; WEAPONS

A pivot pipe (1) for a two-cylinder thick material sludge pump is designed to reduce the rate of wear of the sealing surfaces and flow bores of the pivot pipe (1) and cooperating outlets on the two pump cylinders (42, 44). As the pivot pipe oscillates from one pump cylinder (42) to the other pump cylinder (44) the contacting sealing surfaces are subjected to abrasion and impact wear. The present invention limits the rate of wear between the contacting sealing surfaces and a portion of the flow bore by fixing monolithic wearing rings (22, 17) on the upstream end of the pivot pipe and on the outlets of the two pump cylinders. The monolithic wearing rings (22, 17) are made of a hard materials such as cemented tungsten carbide. L'invention concerne un tuyau pivotant (1) d'une pompe à boues épaisses bicylindre, conçu pour diminuer le rythme d'usure de surfaces d'étanchéité et d'alésages d'écoulement du tuyau pivotant (1) et d'orifices de sortie coopérants ménagés sur les deux cylindres de la pompe (42, 44). Lorsque le tuyau pivotant oscille d'un cylindre de la pompe (42) à l'autre (44), les surfaces d'étanchéité de contact sont soumises à une usure de frottement et d'impact. L'objet de l'invention limite le rythme d'usure entre les surfaces d'étanchéité de contact et une partie de l'alésage d'écoulement, par fixation de bagues d'usure monolithiques (22, 17) sur l'extrémité amont du tuyau pivotant et sur les orifices de sortie des deux cylindres de la pompe. Les bagues d'usure monolithiques (22, 17) sont fabriquées avec des matériaux durs, tels que le carbure de tungstène métallique.