Hydraulic system and rescue device for releasing heavy loads
A technology of hydraulic system and heavy objects, applied in the field of hydraulic control, can solve the problems of difficult to control the unloading of heavy objects by executing parts
Active Publication Date: 2019-10-22
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
[0004] The purpose of the present invention is to provide a hydraulic system and a rescue device for releasing heavy objects, so as to solve the problem that it is difficult for the actuators in the hydraulic system to control the actuators to unload heavy objects in emergency situations such as power source failure.
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[0034] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0035] refer to figure 1 , which shows the hydraulic oil circuit diagram of the hoist of the crane. The hoist has a hydraulic motor 80, which can realize two-way rotation. 85, the hydraulic oil enters the hydraulic motor 80 from the motor oil inlet 82, and flows out from the motor return oil 83, which can realize the rotation of the hydraulic motor 80 in one direction, and can control the rotation speed through the balance valve 90. The reverse rotation of the hydraulic motor 80 can be achieved by changing the flow direction of the hydraulic oil in the motor oil inlet passage 82 and the motor oil return passage 83 , and the motor oil discharge passage 85 is use...
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The invention discloses a hydraulic system for releasing heavy objects and a rescue device. The hydraulic system includes a hydraulic pump, an oil inlet way and an oil control way, wherein the oil inlet way and the oil control way are both communicated with the oil outlet of the hydraulic pump, the tail end of the oil inlet way is provided with a first oil port and a second oil port which are bothcommunicated with the oil inlet way, the tail end of the oil control way is provided with a third oil port communicated with the oil control way, the oil control way is provided with a first pressurereducing valve and a first throttle valve, the first pressure reducing valve is used for limiting the pressure of the third oil port, and the first throttle valve is used for adjusting the pressure of the third oil port. By means of the technical scheme, under emergency situations such as the situation a power source of an executive component is damaged, the hydraulic system for releasing the heavy objects can be communicated, so that it is ensued that the heavy objects are smoothly released by the original executive component, and safe unloading of loads is achieved.
Description
technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulic system and a rescue device for releasing heavy objects. Background technique [0002] Existing hoisting machinery has no special emergency rescue device in the event of a failure. Some cranes can use the residual pressure of the accumulator to open the balance valve of the luffing cylinder to realize emergency lowering of heavy objects in some cases by lowering their own weight. This method has relatively large limitations, and it is prone to overload and lead to new problems. [0003] Since the luffing action causes the amplitude of the weight to increase and the moment of the weight to increase, it is prone to overloading. The practical effect of this device is limited, and it is very easy to cause major accidents due to overloading. This method is of limited use. Contents of the invention [0004] The purpose of the present invention is to provide a h...
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IPC IPC(8): B66C15/00F15B11/08F15B13/02
Inventor 张源
Owner ZOOMLION HEAVY IND CO LTD