Integrated main control valve, hydraulic system and crane
A technology for hydraulic systems and main control valves, applied in mechanical equipment, fluid pressure actuating devices, servo motors, etc., can solve the problems of complex structure and many connecting pipelines, so as to improve the quality of the whole machine and reduce the hydraulic components of the whole machine and the effect of connecting pipelines
Pending Publication Date: 2021-05-14
广西中源机械有限公司 +2
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide an integrated main control valve, hydraulic system and crane for the problems of many connecting pipelines and complex structures in the existing crane hydraulic system.
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[0023] The specific implementation will be described below in conjunction with the accompanying drawings.
[0024] Such as figure 1 As shown, the hydraulic system on the truck crane is used to control the boarding of the truck crane, which includes the main pump 5, the pilot handle 9, the integrated main control valve 6 and the telescopic oil cylinder. The main pump 5 draws hydraulic oil from the hydraulic oil tank to supply oil to the integrated main control valve 6, and the integrated main control valve 6 decompresses the pressure oil in the main oil circuit and outputs it as a pilot oil source to supply oil to the pilot handle 9. The handle 9 is operated by the operator to deliver pilot control pressure oil to the pilot control end of the corresponding main valve core in the integrated main control valve 6 to realize corresponding actions.
[0025] Such as figure 2 As shown, the integrated main control valve 6 includes an oil inlet connection 1 , a winch connection 2 , a...
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The invention relates to a crane hydraulic control system to solve the problems that an existing crane hydraulic system is multiple in connecting pipeline and complex in structure. The invention provides an integrated main control valve, a hydraulic system and a crane. The integrated main control valve comprises an oil inlet unit, a winch unit, a telescopic variable amplitude unit and an oil return unit, pilot hydraulic control ends of main valve elements of the winch unit and the telescopic variable amplitude unit are connected with valve element control electromagnetic valves, oil inlet ends of the valve element control electromagnetic valves are connected with pilot hydraulic control ends of the main valve elements; and the oil outlet end communicates with a pressure relief oil way. According to the integrated main control valve, the valve element control electromagnetic valves only have two oil ports which are convenient to integrate and arrange on the integrated main control valve, so that hydraulic components in the loading hydraulic control system of the crane can be integrated in the main control valve, and connecting pipelines of the hydraulic system are reduced and simplified; and the oil leakage risk points of the whole machine pipeline can be reduced while the cost of the whole machine is reduced.
Description
technical field [0001] The invention relates to a crane hydraulic control system, more specifically, relates to an integrated main control valve, a hydraulic system and a crane. Background technique [0002] The crane boarding hydraulic system includes main pump, pilot pump, pilot handle, pilot oil supply valve, main control valve, telescopic oil cylinder switching valve, two-section arm cylinder and three-four-five-section arm cylinder, etc., among which the pilot pump is for the main control valve Provide pilot flow and pressure; the pilot oil supply valve controls the switch of the pilot pressure, and ensures the load safety of the system by cutting off the pilot pressure; the main control valve of the crane includes a quadruple control oil circuit, which is used to control the main coil, auxiliary coil, Luffing and telescopic cylinders. The telescopic oil cylinder switching valve enables the main control valve to control the expansion and contraction of the two-section ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B11/16F15B13/06F15B1/02
CPCF15B1/02F15B11/16F15B13/06
Inventor 李固徐青山蒋拓高名乾王开宇王冬王宜前陶成勇林汉华
Owner 广西中源机械有限公司