Dual-cylinder synchronous control hydraulic system and crane
A technology of synchronous control and hydraulic system, applied in the field of hydraulic control, can solve the problems of synchronizing error of counterweight cylinder, diverting and collecting valve, heavy weight of counterweight, inability of diverting and collecting valve to meet system design requirements, etc., to eliminate synchronization error. , Improve the effect of synchronization accuracy
Inactive Publication Date: 2012-07-04
XUZHOU HEAVY MASCH CO LTD
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[0005] 1) This method can be adapted to occasions where synchronization requirements are not high, but for large-tonnage cranes, due to the large weight of the counterweight, the synchronization of the two cylinders is even more important, and the separate diverter and flow valve can no longer meet the system design requirements
[0006] 2) The synchronization error of the counterweight oil cylinder mainly depends on the diversion accuracy of the diverter and collector valve. Once the diverter and collector valve is selected, the synchronization system cannot eliminate the synchronization error when the two cylinders are out of sync. great difficulty
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[0033] The core of the invention is to provide a double-cylinder synchronous control hydraulic system. The system's dual hydraulic cylinders not only have high synchronization accuracy, but also can independently control the single cylinder through operation, thereby manually eliminating synchronization errors.
[0034] Another core of the present invention is to provide a crane provided with the double-cylinder synchronous control hydraulic system.
[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] Please refer to figure 1 , figure 1 It is a hydraulic principle diagram of a specific embodiment of the dual-cylinder synchronous control hydraulic system provided by the present invention.
[0037] In a specific embodiment, the dual-cylinder synchronous control hydraulic sys...
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The invention discloses a dual-cylinder synchronous control hydraulic system. The dual-cylinder synchronous control hydraulic system comprises a first cylinder, a second cylinder and a synchronous element as well as a dual-cylinder synchronous independent control device, wherein the dual-cylinder synchronous independent control device comprises a first oil inlet, a second oil inlet, a first oil outlet, a second oil outlet and an oil draining hole as well as a first hydraulic control one-way valve, a second hydraulic control one-way valve, a first reverse valve, a second reverse valve, a first one-way valve and a second one-way valve; the first oil inlet is communicated with the first oil outlet; and the second oil inlet is communicated with the second oil outlet. The dual hydraulic cylinders of the system have higher synchronization accuracy, and single cylinder can be independently controlled by an operation, so that the synchronous error is manually removed. The invention also discloses a crane provided with the dual-cylinder synchronous control hydraulic system.
Description
technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a double-cylinder synchronous control hydraulic system of a crane. The invention also relates to a crane provided with said twin-cylinder synchronously controlled hydraulic system. Background technique [0002] As the tonnage of large-tonnage cranes continues to increase, the weight and quantity of the counterweights are also increasing, so the device for lifting the counterweight is naturally selected as a double hydraulic cylinder. [0003] The use of dual hydraulic cylinders can increase the weight of the counterweight and ensure smoothness. However, there will be a serious problem in the simultaneous operation of the two cylinders, that is, when the two cylinders perform synchronous lifting or falling operations at the same time, there will be a certain synchronization error. The deformation of the piston rod can lead to serious safety accidents. [0004] At pres...
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IPC IPC(8): F15B11/20F15B13/02B66C13/20B66C15/00
Inventor 冯文昌胡小冬
Owner XUZHOU HEAVY MASCH CO LTD