EP 2767619 A1 20140820 - CONVEYING CYLINDER, METHOD FOR MANUFACTURE THEREOF, AND PUMPING EQUIPMENT WITH SAME
Title (en)
CONVEYING CYLINDER, METHOD FOR MANUFACTURE THEREOF, AND PUMPING EQUIPMENT WITH SAME
Title (de)
FÖRDERZYLINDER, HERSTELLUNGSVERFAHREN DAFÜR UND PUMPANLAGE DAMIT
Title (fr)
CYLINDRE DE TRANSPORT, SON PROCÉDÉ DE FABRICATION ET ÉQUIPEMENT DE POMPAGE LE CONTENANT
Publication
Application
Priority
CN 2011080615 W 20111010
Abstract (en)
The disclosure discloses a conveying cylinder and a manufacturing method thereof, and pumping equipment comprising the same. The method for manufacturing the conveying cylinder comprises: forming a preliminary cylinder body by mechanical processing; electroplating the surface of the preliminary cylinder body for the first time, and then performing de-hydrogenation treatment on the coating to form a first chromium coating with a hardness of HRC58-60 and a thickness of 0.15-0.2mm; and electroplating the surface of the first chromium coating for the second time to form a second chromium coating with a hardness of HRC66-68 and a thickness of 0.15-0.2mm, namely, forming the conveying cylinder. By the method, the first and second hard chromium coatings of matched thickness and hardness are electroplated on the inner surface of the cylinder body to improve the wearing resistance of the whole conveying cylinder and the anti-falling off capability of each hard chromium coating, therefore, the service life of the conveying cylinder is prolonged.
IPC 8 full level
C25D 5/14 (2006.01); F04B 53/16 (2006.01)
CPC (source: EP US)
C25D 1/04 (2013.01 - EP); C25D 5/14 (2013.01 - EP US); C25D 5/625 (2020.08 - EP US); C25D 7/04 (2013.01 - EP); F04B 53/16 (2013.01 - EP); F04B 53/162 (2013.01 - EP)
Citation (search report)
See references of WO 2013053097A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2767619 A1 20140820; BR 112014008445 A2 20170411; IN 3016DEN2014 A 20150508; RU 2014115534 A 20151120; WO 2013053097 A1 20130418
DOCDB simple family (application)
EP 11873893 A 20111010; BR 112014008445 A 20111010; CN 2011080615 W 20111010; IN 3016DEN2014 A 20140416; RU 2014115534 A 20111010