Integrated hydraulic valve group, hydraulic drive system and concrete pump
A technology of integrated fluid and valve group, applied in the direction of fluid pressure actuators, servo motor components, servo motors, etc., can solve the problems of complex oil passages, difficult processing and maintenance, and large volume
Active Publication Date: 2016-03-23
SANY AUTOMOBILE MFG CO LTD
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Problems solved by technology
[0003] The hydraulic drive system that provides power for the pumping mechanism is equipped with a hydraulic oil tank, a hydraulic pump and a hydraulic valve group. The hydraulic pump sucks in the hydraulic pump from the hydraulic oil tank and passes through the hydraulic valve group to the main oil cylinder to drive the action of the main oil cylinder; in order to achieve high and low pressure Switching and reversing functions of the main oil cylinder. The existing hydraulic valve group integrates cartridge valve components, electromagnetic reversing valves for high and low pressure pumping, and electromagnetic reversing valves for high and low pressure switching, resulting in large volume, oil Disadvantages of complex road and difficult processing and maintenance
Method used
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[0029] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Attached below Figures 1 to 4 Specific examples of the present invention will be described in detail. like figure 1 As shown, the integrated hydraulic valve group proposed by the specific embodiment of the present invention is provided with a valve body 20, and the valve body 20 is provided with an integrated oil inlet port 1, an integrated oil return port 2, an integrated oil drain port 4, and a first working oil port 5 , the second working oil port 6 and the third working oil port 7; the integrated hydraulic valve group is provided with a hydraulic control reversing valve 10, a first control valve 9, a relief valve 8, a second control valve 3 and a pressure reducing valve 11. The integrated oil inlet 1 is respectively connected with the inlet of the relief valve 8 and the P port of the hydraulic control r...
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The invention discloses an integrated hydraulic valve group, a hydraulic drive system and a concrete pump. The integrated hydraulic valve group is integrated with a hydraulic control reversing valve, a first control valve, a relief valve, a second control valve and a pressure reducing valve. source connection, the first working oil port is connected to the accumulator, the second working oil port and the third working oil port are respectively connected to the main oil cylinder; the relief pressure of the relief valve can be controlled through the first control valve, therefore, using this When the hydraulic valve group is integrated, the maximum working pressure of the hydraulic drive system can be adjusted through the first control as required, so that the hydraulic drive system can meet the needs of low-pressure and high-pressure operations; in addition, compared with the existing technology, the structure of the hydraulic valve group is more Simple, convenient processing and maintenance.
Description
technical field [0001] The invention relates to hydraulic transmission technology, in particular to an integrated hydraulic valve group; in addition, the invention also relates to a hydraulic drive system and a concrete pump with the integrated hydraulic valve group. Background technique [0002] At present, on concrete pumps, the pumping mechanism is one of the most core components. It is usually equipped with two main oil cylinders, two delivery cylinders, two concrete pistons, S valves, swing valve oil cylinders and hoppers. The piston rod of the oil cylinder is connected with a concrete piston, and the concrete piston is slidably set in the delivery cylinder. The swing valve cylinder drives the S valve to alternately communicate with the two main oil cylinders; when the piston rod of the main oil cylinder retracts, the delivery cylinder communicates with the hopper, and from Concrete is sucked into the hopper, and when the piston rod is stretched out, the delivery cylind...
Claims
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IPC IPC(8): F15B13/02F15B1/02
CPCF15B11/028F15B2211/50536F15B2211/5157F15B2211/526F15B2211/55F15B2211/635F15B2211/6355F15B2211/665F15B2211/67
Inventor 代晴华刘永东孙丹
Owner SANY AUTOMOBILE MFG CO LTD