Hose reel hydraulic system and pile machinery
A technology of hydraulic system and hose reel, which is applied in mechanical equipment, fluid pressure actuating device, servo motor, etc., can solve the problems of increasing construction cost, reducing the service life of main oil pipe, and low system efficiency.
Inactive Publication Date: 2015-12-23
SANY HEAVY IND CO LTD (CN)
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Problems solved by technology
[0004] The existing hydraulic system of the hose reel has the following deficiencies or defects: Since the set pressure of the hydraulic system is a relatively large constant value when lifting / lowering, the main oil pipe is under the maximum tension at any depth , which reduces the service life of the main oil pipe and increases the construction cost; in addition, due to the use of quantitative pumps, when the working device (left and right main oil pipes) is lifted / lowered, the hydraulic system always has overflow loss, and the system efficiency is low
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[0039] It should be pointed out that the description of the specific structure and the description sequence in this section are only the description of the specific embodiment, and should not be regarded as having any limiting effect on the protection scope of the present invention. Furthermore, the embodiments in this section and the features of the embodiments may be combined with each other without conflict.
[0040] Please refer to figure 1 and figure 2 , the present invention will be described in detail below with reference to the embodiments.
[0041] combine figure 1 As shown, the hose reel hydraulic system of this embodiment includes a variable displacement pump 2 , a synchronous control valve group 3 , a proportional control valve group 4 , a first hose reel motor 7 and a second hose reel motor 8 . For the convenience of description and public understanding, the engine 1, the first hose reel 5 and the second hose reel 6 are also shown in the figure; however, it sh...
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The invention discloses a hydraulic system of a hose reel and a pile driving machine. The hose reel hydraulic system includes a variable pump, a proportional control valve group and a hose reel motor; the first oil port of the variable pump is connected to the lifting oil port of the hose reel motor; the proportional control valve group The oil inlet and outlet ports of the variable displacement pump are respectively connected to the first oil port of the variable displacement pump and the variable piston cylinder of the variable displacement pump, thereby forming the negative feedback channel of the variable displacement pump; the oil in the first oil port of the variable displacement pump is in the When the pressure reaches the set value of the proportional control valve group, it acts on the variable displacement piston cylinder through the proportional control valve group. Implement the present invention, can change the size of the tension force that the main oil pipe bears, make the tension force that the main oil pipe bears adapt to its depth, promptly avoid the main oil pipe to bear the maximum tension force at any depth, improve The service life of the main oil pipe is extended, thereby reducing the construction cost.
Description
technical field [0001] The invention relates to the technical field of hose reel control, in particular to a hose reel hydraulic system and a pile machine. Background technique [0002] At present, deep foundation pile construction machinery such as diaphragm wall hydraulic grab bucket and reaming rig is generally composed of chassis and working device. In the construction process, in order to realize the reciprocating action of the working device, it is necessary to realize the oil intake and oil return through two hydraulic hoses (also known as the left and right main oil pipes) wound on the left and right hose reels respectively. The hydraulic hose transmits the high-pressure hydraulic oil output from the main pump of the chassis to the working device, and another hydraulic hose provides the oil return channel for the working device. [0003] Since the two hydraulic hoses need to go deep into the ground together with the working device for construction operations, with t...
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IPC IPC(8): F15B11/16F15B13/06E21B7/28
Inventor 杨东升许慧余晓军
Owner SANY HEAVY IND CO LTD (CN)