Positive and negative pump control system and concrete pump truck

• Main Authors: SHEN QIANLI, SU YANLING, JIA JIANHUI
• Format: Patent
• Language: Chinese; English
• Published: 09.09.2022
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The utility model discloses a positive and negative pump control system and a concrete pump truck, the system comprises a swing oil cylinder assembly and a pumping oil cylinder assembly, the pumping oil cylinder assembly comprises a first pumping main oil cylinder and a second pumping main oil cylinder, a first proximity switch and a second proximity switch for detecting the stroke of a piston are respectively arranged in the first pumping main oil cylinder and the second pumping main oil cylinder; the second electromagnetic valve is in communication connection with the first proximity switch and the second proximity switch, two working oil ports of the second electromagnetic valve are connected with the first swing oil cylinder and the second swing oil cylinder respectively, and the two working oil ports of the second electromagnetic valve are further connected to the two ends of the second sliding valve; the first sliding valve is connected with the second sliding valve, a working oil port of the variable p