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1. (WO2015043377) AUXILIARY HYDRAULIC SYSTEM AND CONCRETE PUMPING DEVICE

Pub. No.:    WO/2015/043377    International Application No.:    PCT/CN2014/086346
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Sat Sep 13 01:59:59 CEST 2014
IPC: F15B 11/17
F15B 13/06
Applicants: SANY AUTOMOBILE MANUFACTURING CO., LTD.
三一汽车制造有限公司
Inventors: YANG, Ming
杨敏
SUN, Dan
孙丹
ZHOU, Youzhong
周友中
Title: AUXILIARY HYDRAULIC SYSTEM AND CONCRETE PUMPING DEVICE
Abstract:
An auxiliary hydraulic system and a concrete pumping device. The auxiliary hydraulic system comprises a main oil pump (1), a stirring motor (7), a water-cleaning motor (9), a first reversing valve (6), and a second reversing valve (8). An oil inlet of the main oil pump (1) is connected to an oil tank, an oil outlet of the main oil pump (1) is connected to an oil inlet (P) of the first reversing valve (6), a first working oil port (A) and a second working oil port (B) of the first reversing valve (6) are connected to two oil ports of the stirring motor (7) respectively, an oil return port of the first reversing valve (6) is connected to an oil inlet of the second reversing valve (8), a first optional oil outlet and a second optional oil outlet of the second reversing valve (8) are connected to a first oil port of the water-cleaning motor (9) and the oil tank respectively, and a second oil port of the water-cleaning motor (9) is connected to the oil tank. The auxiliary hydraulic system can achieve synchronization of a stirring operation and a water-cleaning operation. The concrete pumping device is provided with the auxiliary hydraulic system.