EP 2647842 A4 20140820 - METHOD, APPARATUS, AND SYSTEM FOR CONTROLLING PUMPING DIRECTION-SWITCHING FOR USE IN PUMPING APPARATUS
Title (en)
METHOD, APPARATUS, AND SYSTEM FOR CONTROLLING PUMPING DIRECTION-SWITCHING FOR USE IN PUMPING APPARATUS
Title (de)
VERFAHREN, VORRICHTUNG UND SYSTEM ZUR STEUERUNG EINER PUMPENRICHTUNGSUMSCHALTUNG IN EINER PUMPVORRICHTUNG
Title (fr)
PROCÉDÉ, APPAREIL ET SYSTÈME DE COMMANDE DE CHANGEMENT DE SENS DE POMPAGE POUR UTILISATION DANS UN APPAREIL DE POMPAGE
Publication
Application
Priority
CN 2011079520 W 20110909
Abstract (en)
[origin: EP2647842A1] A method, apparatus, and system for controlling pumping direction switching for use in a pumping apparatus. The system comprises at least two first proximity switches (110) used for detecting whether a first oil cylinder piston (61) has reached a predetermined position; at least one second proximity switch (120) used for detecting whether a second oil cylinder piston (62) has reached a predetermined position; and a controller connected to the at least two first proximity switches (110) and to the at least one second proximity switch (120), used for selecting a proximity switch combination, and, when the selected proximity switch combination detects that the first oil cylinder piston (61) or the second oil cylinder piston (62) has reached the predetermined position, for controlling a direction-switching valve of the pumping apparatus to switch directions. The proximity switch combination comprises one of the at least two first proximity switches (110) and one of the at least one second proximity switch (120). When a proximity switch is damaged, another proximity switch is used to replace the damaged proximity switch, thereby ensuring that the control over direction-switching is maintained
IPC 8 full level
F04B 9/117 (2006.01); F04B 15/02 (2006.01)
CPC (source: EP)
F04B 9/1172 (2013.01); F04B 15/023 (2013.01); F04B 2201/0201 (2013.01)
Citation (search report)
- [YA] JP H10331762 A 19981215 - NIIGATA ENGINEERING CO LTD
- [YA] US 2006245943 A1 20061102 - HOFMANN WILHELM [DE], et al
- See references of WO 2013033915A1
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 2647842 A1 20131009; EP 2647842 A4 20140820; BR 112013015754 A2 20181106; RU 2013126766 A 20151020; WO 2013033915 A1 20130314
DOCDB simple family (application)
EP 11871867 A 20110909; BR 112013015754 A 20110909; CN 2011079520 W 20110909; RU 2013126766 A 20110909