Hydraulic control system and crane with same
A technology of hydraulic control system and control valve, which is applied in the direction of cranes, fluid pressure actuation system safety, mechanical equipment, etc., and can solve the problems of high pressure unloading energy loss and other problems
Active Publication Date: 2016-12-07
河北雷萨重型工程机械有限责任公司
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Problems solved by technology
[0007] The main purpose of the present invention is to provide a hydraulic control system and a crane with it, so as to solve the problem in the prior art that the configuration and installation of the crane and the combined control of the control room are integrated but the energy loss of high-pressure unloading is large
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[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0024] Such as figure 1 As shown, according to the embodiment of the present invention, the hydraulic control system includes an oil inlet pipe 91 and an oil return pipe 92, and the oil return pipe 92 communicates with the fuel tank. The hydraulic control system also includes a general control valve group, a counterweight control valve group and a control room control valve group , the main control valve group is used to control the on-off between the counterweight control valve group and the control room control valve group and the oil inlet pipe 91 and the oil return pipe 92, so as to control the hydraulic control system. 91 and the first reversing valve 1 between the oil return pipe 92, the...
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The invention provides a hydraulic control system and a crane therewith, wherein the hydraulic control system includes an oil inlet pipe and an oil return pipe and also includes: a total control valve group, which includes a first reversing valve being connected between the oil inlet pipe and the oil return pipe, when the first reversing valve is in a first work position, the oil inlet pipe and the oil return pipe are communicated with each other; a weight balancing control valve group which is arranged between the oil return pipe and the first reversing valve, is disposed at the downstream of the first reversing valve, is connected to a weight balancing oil cylinder and drives the weight balancing oil cylinder to stretch out and draw back; an operation room control valve group which is arranged between the oil return pipe and the first reversing valve, is disposed at the downstream of the first reversing valve, is connected to an operation room oil cylinder, and controls the operation room oil cylinder to stretch out and draw back. When the first reversing valve is at a second work position, the oil inlet pipe is communicated with the weight balancing control valve group or the operation room control valve group through the first reversing valve, and when the weight balancing oil cylinder is not operated, the oil inlet pipe is communicated with the oil return pipe through the weight balancing control valve group, or when the operation room oil cylinder is not operated, the oil inlet pipe is communicated with the oil return pipe through the operation room control valve group. The system allows low-pressure unloading.
Description
technical field [0001] The invention relates to the field of crane hydraulic control systems, in particular to a hydraulic control system and a crane with the same. Background technique [0002] At present, there are several situations in the counterweight installation and control room combination control valve group of the wheeled crane configuration in the market: [0003] 1. Independently control and operate the installation of the crane counterweight, without the control of the control room; the function of this method is relatively simple, and there are certain limitations in the operation field of vision and installation difficulties; [0004] 2. Use the programmable logic controller PLC to track the length information of the oil cylinder and compare it with the length information of the reference oil cylinder to adjust the synchronous action of the counterweight, and to control the control room and other related actions separately; this method is too complicated and c...
Claims
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IPC IPC(8): B66C13/20
CPCB66C13/20B66C23/76F15B13/06F15B20/00F15B2211/315
Inventor 李金灵林正明
Owner 河北雷萨重型工程机械有限责任公司