Hydraulic control system and crane with same
A hydraulic control system and total control technology, applied in mechanical equipment, fluid pressure actuators, load suspension components, etc., can solve the problems of high pressure unloading energy loss and other problems
Active Publication Date: 2017-01-11
河北雷萨重型工程机械有限责任公司
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- Claims
- Application Information
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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 installation of the counterweight 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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[0024] 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.
[0025] 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 oil tank. The hydraulic control system also includes a general control valve group, a counterweight control valve group and a control room control valve Group.
[0026] Wherein, the general control valve group includes the pilot relief valve 5 connected between the oil inlet pipe 91 and the oil return pipe 92, the remote control port K of the pilot relief valve 5 is connected with the oil tank through the first reversing valve 4, and the first reversing valve 4. It has 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, which is communicated with an oil tank, and also includes: a total control valve group, which includes a guide overflow valve being connected between the oil inlet pipe and the oil return pipe, wherein a remote control port K of the guide overflow valve is connected to the oil tank through a first reversing valve having a first work position enabling the remote control port K to be communicated with the oil tank and a second work position enabling the remote control port K to be separated from the oil tank. The total control valve group also includes a second reversing valve, which is connected between the oil inlet pipe and the oil return pipe and is provided with a first work position connecting the oil inlet pipe to the oil outlet pipe and a second work position disconnecting the oil inlet pipe from the oil outlet pipe; a weight balancing control valve group, which is installed between the oil inlet pipe and the oil return pipe and drives a weight balancing oil cylinder to stretch out and draw back; and an operation room control valve group which is installed between the oil inlet pipe and the oil return pipe and drives an operation room oil cylinder to stretch out and draw back. 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): B66C13/20F15B11/00
CPCB66C13/20F15B11/16
Inventor 李金灵林正明
Owner 河北雷萨重型工程机械有限责任公司