Hydraulic system and pile machine equipment

Abstract

The hydraulic system comprises an oil tank and an oil supply pump, a main oil path of the oil supply pump is provided with a plurality of branch modules connected in parallel, each branch module comprises a reversing valve and an execution unit, and the reversing valves are used for switching oil supply and return states; a pilot overflow valve and a two-position three-way electromagnetic directional valve are arranged in the oil supply pump, and the two-position three-way electromagnetic directional valve is communicated with a pilot oil way in the pilot overflow valve and an oil tank; the pilot overflow valve is normally closed, the two-position three-way electromagnetic directional valve is normally opened to keep an unloading state, and after the two-position three-way electromagnetic directional valve is closed, the pilot overflow valve releases pressure when oil supply pressure reaches first preset pressure. The driving requirements of different parts and different modes on pile machine equipment are met through the multiple branch modules, the requirements of stable-pressure operation of an oil supply pump and remote control of rapid pressure relief are met through cooperation of the pilot overflow valve and the two-position three-way electromagnetic reversing valve, and the stability and safety of a hydraulic system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic control, and particularly relates to a hydraulic system and a pile driver device. Background Art

[0002] The pile driver device is an important mechanical equipment for foundation construction. Its main function is to drive or drill piles into the ground to improve the bearing capacity and stability of the foundation. It is widely used in various construction scenarios and will also integrate different functional modules according to engineering needs. For large-scale construction conditions, the pile driver device not only has a large volume itself, but also integrates multiple functional modules inside, such as multi-directional movement, lifting and lowering, and clamping and pressing piles. The control of each part of the module may use different drive modules, and the production and use processes are relatively complex.

[0003] Therefore, how to meet the complex motion drive requirements of the pile driver device is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a hydraulic system to meet the complex motion drive requirements of the pile driver device.

[0005] Another purpose of the present invention is to provide a pile driver device including the above-mentioned hydraulic system.

[0006] To achieve the above purposes, the present invention provides the following technical solutions:

[0007] A hydraulic system, comprising:

[0008] An oil tank and an oil supply pump. A plurality of parallel branch modules are arranged on the main oil path of the oil supply pump. The branch module includes a directional control valve and an actuator. Each directional control valve includes at least two working positions to switch the oil supply and return states in the corresponding branch module. The actuator is a hydraulic cylinder or a hydraulic motor to perform linear motion or rotational motion;

[0009] A pilot-operated relief valve and a two-way three-position solenoid directional control valve are arranged in the oil supply pump. The two-way three-position solenoid directional control valve connects the pilot oil path in the pilot-operated relief valve and the oil tank; the pilot-operated relief valve is normally closed, the two-way three-position solenoid directional control valve is normally open to maintain a unloading state. After the two-way three-position solenoid directional control valve is energized and closed, the pilot-operated relief valve is opened to overflow and relieve pressure when the oil supply pressure in the oil supply pump reaches the first preset pressure.

[0010] Preferably, in the above hydraulic system, a first branch module is provided on the main oil path, and a three-position four-way directional control valve is provided on the first branch module; a power head lifting oil cylinder is provided downstream of the three-position four-way directional control valve, and a hydraulic lock and a double check valve throttle valve are provided in the oil path between the three-position four-way directional control valve and the power head lifting oil cylinder, and the double check valve throttle valve is used to limit the oil supply flow rate of the power head lifting oil cylinder.

[0011] Preferably, in the above hydraulic system, a second branch module parallel to the first branch module is further provided on the main oil path, a three-position four-way directional control valve is provided on the second branch module, and a power head motor is provided downstream of the three-position four-way directional control valve; a double check valve throttle valve is provided on the second branch module to adjust the oil supply flow rate of the power head motor, and overflow valves with a set value of a second preset pressure are provided on both the oil supply and return oil paths of the second branch module and are connected to the main return oil path.

[0012] Preferably, in the above hydraulic system, three groups of the first branch modules are provided in parallel on the main oil path, and the three power head lifting oil cylinders cooperate to meet the lifting drive requirements of the power head; two groups of the second branch modules are provided in parallel on the main oil path, and the two power head motors cooperate to meet the rotation drive requirements of the power head.

[0013] Preferably, in the above hydraulic system, the three-position four-way directional control valve on the first branch module is a Y-type three-position four-way directional control valve; the three-position four-way directional control valve on the second branch module is an O-type three-position four-way directional control valve.

[0014] Preferably, in the above hydraulic system, four groups of third branch modules are further provided on the main oil path. A single third branch module includes a three-position four-way directional control valve and a outrigger oil cylinder provided downstream of the three-position four-way directional control valve. The four outrigger oil cylinders are used to drive the outriggers to achieve stable support on the installation surface;

[0015] A first check valve is provided in the oil path corresponding to the rodless cavity of the outrigger oil cylinder, and the first check valve is connected to a control oil path. An electromagnetic two-position directional control valve is provided on the control oil path to adjust the opening and closing of the first check valve.

[0016] Preferably, in the above hydraulic system, two groups of fourth branch modules and two groups of fifth branch modules are further provided on the main oil path. The fourth branch module is provided with a large ship oil cylinder, a three-position four-way directional control valve for adjusting the oil supply and return state of the large ship oil cylinder, and a double check valve throttle valve for limiting the oil supply flow rate of the large ship oil cylinder;

[0017] A small boat oil cylinder is provided on the fifth branch module, as well as a three-position four-way directional control valve for adjusting the oil supply and return state of the small boat oil cylinder, and a double check valve throttle valve for restricting the oil supply flow of the small boat oil cylinder.

[0018] Preferably, in the above hydraulic system, branch modules are also provided on the main oil path in parallel with the winch hoist motor, the clamping box advancing and retreating oil cylinder, and the lifting rod fixing oil cylinder as the execution units respectively.

[0019] Preferably, in the above hydraulic system, the oil supply pump includes two hydraulic pump groups and a booster pump group arranged in parallel; the working pressure of the hydraulic pump group is 14 MPa - 15 MPa, and the working pressure of the booster pump group is 24 MPa - 26 MPa.

[0020] A pile driver device includes the hydraulic system described in any one of the above embodiments to drive and control each component.

[0021] As can be seen from the above technical solutions, in the hydraulic system provided by the present invention, a plurality of branch modules are provided on the main oil path of the oil supply pump to drive different functional modules on the pile driver device. A single branch module includes a directional control valve and an execution unit. The directional control valve can change the oil supply and return circulation direction in the branch module by switching the working position, and the execution unit can be a hydraulic cylinder to perform linear drive or a hydraulic motor to achieve rotational drive; a pilot-operated relief valve and a two-position three-way solenoid directional control valve are also provided in the oil supply pump. The two ends of the pilot-operated relief valve are respectively connected to the main oil path and the oil tank. After setting the first preset pressure of its spool, when the pressure oil supplied by the oil supply pump exceeds the first preset pressure, the pilot-operated relief valve is opened through the hydraulic control oil path to achieve pressure relief protection, avoiding damage to hydraulic components or abnormal drive of external structures due to excessive pressure in the hydraulic system. The oil paths at both ends of the two-position three-way solenoid directional control valve are connected to the pilot oil path in the pilot-operated relief valve and the oil tank. The two-position three-way solenoid directional control valve is normally open to maintain the pressure relief state, ensuring the safety of the hydraulic system and avoiding abnormal operation of the oil supply pump; at the same time, the two-position three-way solenoid directional control valve switches the passage state through remote electric control. After the two-position three-way solenoid directional control valve switches to the closed state, the main oil path normally builds pressure, and the pilot-operated relief valve realizes the constant pressure protection function for the main oil path. The cooperating pilot-operated relief valve and two-position three-way solenoid directional control valve can achieve stable pressure control or remote pressure relief control of the oil supply pump, improving the operation stability and adjustment convenience of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of the hydraulic system provided by the embodiment of the present invention;

[0024] Figure 2 For Figure 1 Schematic diagram of area A in

[0025] Figure 3 For Figure 1 Schematic diagram of area B in

[0026] Figure 4 For Figure 1 Schematic diagram of area C in

[0027] Figure 5 For Figure 1 Schematic diagram of area D in

[0028] Figure 6 For Figure 1 Schematic diagram of area E in

[0029] Figure 7 For Figure 1 Schematic diagram of some areas in

[0030] Figure 8 Schematic diagram of part of the structure of the pile driver equipment.

[0031] Among them, 10 - fuel tank; 20 - supply oil pump; 210 - pilot - type overflow valve; 220 - two - position three - way solenoid directional valve; 230 - hydraulic pump group; 240 - booster pump group; 30 - first branch module; 310 - Y - type three - position four - way directional valve; 320 - power head lifting oil cylinder; 330 - hydraulic lock; 340 - double one - way throttle valve; 40 - second branch module; 410 - O - type three - position four - way directional valve; 420 - power head motor; 430 - overflow valve; 50 - third branch module; 510 - outrigger oil cylinder; 520 - first check valve; 530 - control oil circuit; 540 - solenoid two - position directional valve; 60 - fourth branch module; 610 - large ship oil cylinder; 70 - fifth branch module; 710 - small ship oil cylinder; 810 - winch hoist motor; 8110 - three - position four - way directional valve; 820 - holding pressure box advancing and retreating oil cylinder; 830 - lifting rod fixing oil cylinder; 910 - outrigger; 920 - winch hoist. Specific embodiments

[0032] The core of the present invention lies in disclosing a hydraulic system to meet the complex motion driving requirements of pile driver equipment.

[0033] Another object of the present invention is to provide a pile driver equipment including the above-mentioned hydraulic system.

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, the embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, the embodiments shown below do not impose any limitation on the inventive content recited in the claims. Moreover, all the contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the invention recited in the claims.

[0035] As Figure 1 and Figure 2 shown, the hydraulic system provided by the embodiment of the present invention mainly includes an oil tank 10 and an oil supply pump 20 to suck and transport hydraulic oil from the oil tank 10 through the oil supply pump 20. A plurality of parallel branch modules are arranged on the main oil path of the oil supply pump 20. The parallel branch modules can supply oil through a single main oil path and independently adjust the drive. The branch module mainly includes a directional valve and an actuator. The directional valve is used to connect the main oil path with the supply and return oil pipelines of the branch module. The directional valve has at least two working positions to be able to change the supply and return oil states of the corresponding branch module through the switching of its working positions. The actuator is a hydraulic cylinder or a hydraulic motor to adapt to the drive requirements of different components on the pile driver equipment. Usually, the hydraulic cylinder is used to perform linear motion in the horizontal direction, lifting in the vertical direction, etc., while the hydraulic motor can perform rotational drive.

[0036] The hydraulic system provided by the above embodiments integrates and independently drives different modules on the pile driver equipment through multiple parallel branch modules, enabling the complex components on the pile driver equipment to be controlled on a single panel, thereby reducing the operation difficulty of the operator for the pile driver equipment. It should be noted that the oil supply pump 20 has a combined pump structure. While it includes a hydraulic pump for oil supply, it also has a combined structure of a pilot-operated relief valve 210 and a two-position three-way solenoid directional valve 220 on the oil path. Among them, the pilot-operated relief valve 210 is used to connect the main oil path and the oil tank 10. It remains normally closed during the operation of the hydraulic system and is set to be compressed and opened at a first preset pressure by means of an internal spring. During the process of the oil supply pump 20 establishing pressure in the hydraulic system, the pilot-operated relief valve 210 remains closed, and the main oil path successfully establishes pressure. When the pressure in the main oil path reaches the first preset pressure, the pilot oil path in the pilot-operated relief valve 210 pushes the spool of the main valve body to move, so that the inlet and outlet ports of the pilot-operated relief valve 210 are connected, and the main oil path is connected to the oil tank 10 to achieve pressure relief. At the same time, after the pressure in the main oil path is less than the first preset pressure, the inlet and outlet ports of the pilot-operated relief valve 210 are disconnected to ensure the smooth oil supply of the main oil path.

[0037] The pilot-operated relief valve 210 can limit the pressure of the main oil path of the hydraulic system to protect it from abnormal operation of the branch module due to excessive main oil path pressure, which may lead to damage to hydraulic components or abnormal operation of the actuator. On this basis, the two-position three-way solenoid directional valve 220 is used for remote control to directly adjust the operation state of the pilot-operated relief valve 210. The two ends of the two-position three-way solenoid directional valve 220 are respectively connected to the pilot oil path in the pilot-operated relief valve 210 and the oil tank 10 to access the pilot-operated relief valve 210. At the same time, the two-position three-way solenoid directional valve 220 maintains an open working position. When the two-position three-way solenoid directional valve 220 is in the open position, the pilot oil path of the pilot-operated relief valve 210 is directly connected to the oil tank 10. Since the oil pressure in the oil tank 10 is close to zero, the pilot oil of the pilot-operated relief valve 210 is discharged, making it easy to open the pilot valve and connect the inlet and outlet ports of the pilot-operated relief valve 210 to unload the hydraulic oil on the main oil path. When the two-position three-way solenoid directional valve 220 is energized, it cuts off the path between the pilot oil and the oil tank 10, enabling the pilot-operated relief valve 210 to independently play a pressure-setting role on the main oil path, that is, the pilot-operated relief valve 210 only opens for overflow pressure relief when the pressure of the main oil path reaches the first preset pressure, thereby protecting the hydraulic system.

[0038] In the above embodiments, by providing a pilot-operated relief valve 210 in a normally closed state and a two-position three-way solenoid directional control valve 220 in a normally open state, the hydraulic system is maintained in a unloading state through the connection effect of the two-position three-way solenoid directional control valve 220, reducing energy waste and preventing abnormal pressure build-up in multiple parallel branch modules when not in use. That is, the safety of the pile driver equipment is ensured by keeping the hydraulic system in a unloading state under normal conditions. At the same time, when it is necessary to drive the pile driver equipment, that is, when it is necessary to build pressure through the hydraulic system, the two-position three-way solenoid directional control valve 220 is remotely controlled to be energized to switch its working position. The two-position three-way solenoid directional control valve 220 switches to an open state to disconnect the pilot oil from the oil tank 10, enabling the pilot-operated relief valve 210 to independently exert a constant pressure function on the main oil path. When equipment driving is required, the operator needs to first adjust the two-position three-way solenoid directional control valve 220 to be energized and then perform the driving adjustment of the corresponding branch module, adding a prerequisite step for the adjustment of the pile driver equipment and reducing the risk of operator misoperation.

[0039] Further, in some embodiments of the present invention, as Figure 1 and Figure 3 shown, a first branch module 30 is provided on the main oil path. Specifically, a four-way three-position directional control valve is provided on the first branch module 30 to connect or close the supply and return oil pipelines in the main oil path and the first branch module 30. It should be noted that the four-way three-position directional control valve has three working positions and four oil passage channels. By changing the handle position of the directional control valve or the energized state of the solenoid coil, the different flow directions of the oil fluid among the four channels can be controlled, thereby realizing diversified motion control of the downstream actuator unit. Correspondingly, a power head lifting oil cylinder 320 is connected downstream of the four-way three-position directional control valve. The power head lifting oil cylinder 320 realizes the power head lifting motion execution component through the extension and retraction of its piston rod. When the four-way three-position directional control valve is in two opposite working positions on both sides, the oil fluid will enter or flow out of the power head lifting oil cylinder 320 in different flow directions, thereby driving the piston rod of the power head lifting oil cylinder 320 to extend or retract, driving the power head to perform actions of rising, stopping, or descending to meet the precise adjustment requirements for the height of the power head in different construction or operation scenarios.

[0040] It should be noted that in the first branch module 30, a hydraulic lock 330 and a double one-way throttle valve 340 are also provided in the oil circuit between the three-position four-way directional control valve and the power head lifting oil cylinder 320. Among them, the hydraulic lock 330 is mainly composed of two pilot-operated check valves, and the closing direction of the pilot-operated check valve is the oil return direction of the oil circuit in the first branch module 30. The pilot-operated check valve can close or open the oil circuit under the action of the corresponding control oil circuit to realize the extension and retraction of the power head lifting oil cylinder 320. At the same time, when the power head lifting oil cylinder 320 does not need to act or needs to be maintained at a certain specific position, the hydraulic lock 330 can seal the oil circuits at both ends of the oil cylinder to prevent oil leakage, ensure the stable position of the power head lifting oil cylinder 320, and avoid unstable phenomena such as the power head sliding down or moving up due to accidental oil flow, greatly improving the safety and reliability during the use of the pile driver equipment.

[0041] The double one-way throttle valve 340 is composed of two groups of one-way valves and throttle valves. One group of one-way valves and throttle valves are respectively arranged on the oil supply and return oil paths of the power head lifting oil cylinder 320. The one-way valve is used to conduct the return oil of the power head lifting oil cylinder 320 and block its oil supply, so that the oil supply of the power head lifting oil cylinder 320 can only be realized through the throttle valve, thereby enabling the adjustment of the oil supply flow rate of the power head lifting oil cylinder 320, and effectively adjusting the movement speed of the power head lifting oil cylinder 320.

[0042] In the above embodiment, when the power head on the pile driver equipment needs to slowly descend to accurately align with the working position, by appropriately adjusting the opening degree of the throttle valve, the speed of the oil entering the oil cylinder can be reduced, so that the piston rod of the power head lifting oil cylinder 320 slowly extends, realizing the smooth descent of the power head. When the power head needs to quickly rise to improve work efficiency, the opening degree of the throttle valve can be increased to allow the oil to quickly flow into the oil cylinder, driving the piston rod of the power head lifting oil cylinder 320 to quickly retract and driving the power head to quickly rise. The setting of the double one-way throttle valve 340 realizes the precise control of the flow rate of the power head lifting oil cylinder 320, which can not only meet the requirements for the lifting speed of the power head in different working environments, but also effectively avoid adverse effects such as impact and vibration caused by too fast or too slow speed, extend the service life of the equipment, and improve the performance and adaptability of the entire hydraulic system.

[0043] On the basis of the above embodiment, such as Figure 1 and Figure 4As shown, a second branch module 40 is also provided on the main oil path in parallel with the first branch module 30, so that the hydraulic system can control multiple different types of actuators simultaneously to meet more complex and diverse working requirements. Specifically, a three-position four-way directional control valve is also configured on the second branch module 40. However, compared with the three-position four-way directional control valve in the first branch module 30, there are differences in its control logic and functional applications. The downstream of the three-position four-way directional control valve on the second branch module 40 is connected to the power head motor 420, so as to convert hydraulic energy into mechanical energy and output rotational power to drive the components on the pile driver equipment. It should be noted that in order to achieve precise control of the rotational speed of the power head motor 420, a double one-way throttle valve is also provided on the second branch module 40. Similar to the double one-way throttle valve in the first branch module 30, this throttle valve can limit and regulate the oil flow rate entering the power head motor 420. By controlling the oil flow rate, the rotational speed of the power head motor 420 can be correspondingly controlled, so that the power head motor 420 can operate stably at the required rotational speed as needed.

[0044] It should be further noted that an overflow valve 430 is also provided on the oil supply and return oil paths of the second branch module 40 for overflow protection of the second branch module 40. Specifically, the overflow valve 430 is of a normally closed structure, and its set pressure is the second preset pressure, which is set according to the driving requirements of the pile driver equipment. In a specific embodiment of the present invention, the second preset pressure of the overflow valve 430 is 17 MPa. During the process of filling hydraulic oil into the oil supply and return oil paths of the second branch module 40 to drive the power head motor 420, when the pressure of the hydraulic oil is below 17 MPa, the overflow valve 430 remains closed, and the oil supply and return oil paths of the second branch module 40 operate normally. When the oil pressure is not less than 17 MPa, the hydraulic control oil path of the overflow valve 430 will be pressurized to open the valve core, and the overflow valve 430 connects the oil supply path to the fuel tank 10, so that the pressure oil of the second branch module 40 is discharged, to avoid damage to the hydraulic components of the second branch module 40 caused by excessive pressure, or problems such as abnormal operation of the power head motor 420.

[0045] Taking the parallel first branch module 30 and second branch module 40 as examples in the above embodiments, the hydraulic system can drive different actuating units, namely the power head lifting cylinder 320 and the power head motor 420, through different branches. This meets the driving requirements for components in different areas of the pile driver equipment and also realizes the driving requirements for linear and rotational motions. The two branch modules operate independently and cooperate with each other to achieve the integrated control of the hydraulic system. On the basis of the above embodiments, in order to improve the stable effect of the hydraulic system in driving the components on the pile driver equipment, three groups of the first branch modules 30 are arranged in parallel on the main oil path, and each group of the first branch modules 30 corresponds to an independent power head lifting cylinder 320, so as to form a structural design with three groups of power head lifting cylinders 320 in parallel, and realize the multi-point cooperative control of the power head lifting action. During the actual driving process, the three power head lifting cylinders 320 cooperate with each other to complete the lifting drive task of the power head more stably and efficiently. It should be further noted that the three power head lifting cylinders 320 can adopt a structure of two in use and one in reserve. By using a single power head lifting cylinder 320 as the standby cylinder, the impact on production caused by the abnormality of a single cylinder during operation can be avoided, and the shutdown risk can be reduced. At the same time, the three power head lifting cylinders 320 can also act together. In the pile driver equipment, the power head often needs to bear a large weight and needs to perform lifting operations within a large stroke range. At this time, a single power head lifting cylinder 320 may be difficult to meet the requirements of heavy load and long stroke. By adopting the form of three power head lifting cylinders 320 in parallel, the load can be distributed to the three cylinders, and each cylinder only needs to bear part of the load. This can not only improve the load capacity of the entire system, but also effectively reduce the burden on a single cylinder and extend the service life of the cylinder. At the same time, in terms of control accuracy, through the independent control and cooperative adjustment of the three power head lifting cylinders 320, the lifting position of the power head can be controlled more precisely, and a more stable and accurate lifting motion can be achieved.

[0046] Similarly, two groups of the second branch modules 40 are arranged in parallel on the main oil path, and each group of the second branch modules 40 corresponds to a power head motor 420, so as to form a structure of two power head motors 420. In some scenarios that require a large torque or rotational operations under complex working conditions, the two power head motors 420 can work simultaneously to provide a stronger rotational power output, ensuring that the power head can smoothly overcome the resistance during work and rotate stably. In addition, by reasonably distributing the load of the two power head motors 420, a more refined control of the rotational speed and torque of the power head can be achieved, improving the adaptability and working efficiency of the power head under different working conditions.

[0047] Furthermore, in the hydraulic system provided by the embodiments of the present invention, the directional control valve is the basis for the stable operation of each branch module. In some specific embodiments of the present invention, for the three-position four-way directional control valve on the first branch module 30, a Y-type three-position four-way directional control valve 310 is adopted. When the Y-type directional control valve is in the neutral position, both the oil inlet and the oil return port are closed, while the two working oil ports are both communicated with the oil return port, and the hydraulic cylinder is in a floating state and can move under the action of external force. In some working conditions where the power head lifting cylinder 320 needs to adjust its position according to the external load, the floating function of the Y-type directional control valve can enable the power head lifting cylinder 320 to move freely with the change of the external load without being restricted by the hydraulic system, so as to achieve the purpose of automatic leveling, improving the adaptability and working efficiency of the equipment.

[0048] For the three-position four-way directional control valve on the second branch module 40, an O-type three-position four-way directional control valve 410 is adopted. When the O-type directional control valve is in the neutral position, the oil inlet, the working oil port and the oil return port are all closed, so that when the power head motor 420 is in a non-working state or a running pause state, the three-position four-way directional control valve can effectively lock the oil circuit, preventing oil leakage and avoiding the problems of accidental rotation or position deviation of the power head motor 420 caused by leakage, ensuring the position stability of the power head motor 420.

[0049] For the above-mentioned Y-type three-position four-way directional control valve 310 and O-type three-position four-way directional control valve 410, when they are in the left position and the right position, they can switch the oil supply and return states of the oil circuit in the corresponding branch module to achieve the function of oil circuit commutation, which will not be elaborated here.

[0050] Furthermore, in the hydraulic system provided by the embodiments of the present invention, as Figure 1 and Figure 5 shown, four groups of third branch modules 50 are also provided on the main oil path to correspond to four outrigger cylinders 510, so as to realize the stable setting of the pile driver equipment on the placement surface. Taking a single third branch module 50 as an example for illustration, a single third branch module 50 is also composed of a three-position four-way directional control valve and the downstream outrigger cylinder 510. The outrigger cylinder 510 is a key component for driving the outriggers of the pile driver equipment to achieve stable support on the setting surface. By operating the corresponding three-position four-way directional control valve, the oil supply and return state of the third branch module 50 can be adjusted, so as to control the telescopic action of the outrigger cylinder 510, enabling the equipment to ensure the balance and stability of the whole equipment through the stable support of the outriggers under various different ground conditions. It should be noted that multiple third branch modules 50 are independently driven, so that when the pile driver equipment operates on some uneven or soft ground, each outrigger contacts the ground with different extended lengths and can firmly support on the ground, preventing the equipment from tilting, overturning and other dangerous situations due to uneven or soft ground.

[0051] It should be noted that, as Figure 5 shown, more groups can also be set for the third branch module 50 to correspond to more outrigger cylinders 510, so as to improve the setting stability of the pile driver equipment. At the same time, a first one-way valve 520 is also provided in the oil circuit corresponding to the rod chamber of a single outrigger cylinder 510. The first one-way valve 520 closes the oil return of the oil circuit corresponding to the rod chamber of the outrigger cylinder 510 to maintain pressure in the rod chamber and prevent the outrigger from moving abnormally. At the same time, a control oil circuit 530 is connected to the first one-way valve 520, and an electromagnetic two-way directional valve 540 is provided on the control oil circuit 530 to control the oil flow direction of the control oil circuit 530 through the electromagnetic two-way directional valve 540, thereby realizing the adjustment of the opening and closing of the first one-way valve 520. That is, for the third branch module 50, to adjust the outrigger cylinder 510, it is necessary to reverse the electromagnetic two-way directional valve 540 on the control oil circuit 530 to open the first one-way valve 520, and then drive the outrigger cylinder 510 by reversing the three-way four-way directional valve, adding an insurance operation process for the outrigger providing the basic support and reducing the risk of misoperation of the outrigger. After the outrigger of the pile driver equipment is in place, the closing of the first one-way valve 520 can also ensure the stability of the internal oil pressure of the outrigger cylinder 510 and prevent unstable phenomena such as outrigger slip caused by external factors, further improving the safety and stability of the equipment during operation.

[0052] Specifically, as Figure 8 shown, the pile driver equipment includes four outriggers 910 to support the overall structure of the pile driver equipment. Each outrigger 910 corresponds to an outrigger cylinder 510. For a single outrigger 910 and the corresponding outrigger cylinder 510, when the outrigger cylinder 510 is working, as Figure 5 , the a end of the three-way four-way directional valve is powered on, and the three-way four-way directional valve switches to the right position for operation. At this time, after the oil supply reaches this oil circuit, it enters the rodless chamber of the outrigger cylinder 510, and the oil in the rod chamber of the outrigger cylinder 510 is connected to the return circuit and discharged. The outrigger cylinder 510 executes the action of extending the piston rod, and the outrigger 910 corresponding to the pile driver equipment extends; correspondingly, when the b end of the three-way four-way directional valve is powered on, the three-way four-way directional valve switches to the left position for operation. At this time, after the oil supply reaches this oil circuit, it enters the rod chamber of the outrigger cylinder 510, and the oil in the rodless chamber of the outrigger cylinder 510 is connected to the return circuit and discharged. The outrigger cylinder 510 executes the action of retracting the piston rod, and the outrigger 910 corresponding to the pile driver equipment retracts. By independently adjusting the four outrigger cylinders 510, the extending lengths of the four different outriggers 910 of the pile driver equipment can be realized, and the pile driver equipment can be stably set at different working surface positions.

[0053] It should be noted that the driving methods of other linear cylinders provided in the embodiments of the present invention for the outriggers 910 are similar to those of the above-mentioned outrigger cylinders 510, and will not be elaborated here.

[0054] Based on the above embodiments, as Figure 1 and Figure 6 shown, other branch modules are also provided on the main oil path, such as the fourth branch module 60 and the fifth branch module 70. In a specific embodiment of the present invention, two sets of fourth branch modules 60 and two sets of fifth branch modules 70 are provided on the main oil path. Among them, a large ship oil cylinder 610 is provided on each fourth branch module 60, as well as a three-position four-way directional control valve for adjusting the oil supply and return state of the large ship oil cylinder 610, and a double one-way throttle valve for restricting the oil supply flow rate of the large ship oil cylinder 610; similarly, a small ship oil cylinder 710 is provided on each fifth branch module 70, as well as a three-position four-way directional control valve for adjusting the oil supply and return state of the small ship oil cylinder 710, and a double one-way throttle valve for restricting the oil supply flow rate of the small ship oil cylinder 710. Both the large ship oil cylinder 610 and the small ship oil cylinder 710 are linear drive cylinders, and their cooperation can move the components on the pile driver equipment to any position on a single plane. For example, the large ship oil cylinder 610 simultaneously bears the small ship oil cylinder 710 and other equipment that needs to move, and drives the small ship oil cylinder 710 and other equipment to move in the first direction during operation. After the large ship oil cylinder 610 stabilizes, the small ship oil cylinder 710 drives the equipment carried on the small ship oil cylinder 710 to move in the second direction perpendicular to the first direction to achieve the position transfer of the equipment and reach the required working position. Similarly, at least two large ship oil cylinders 610 and small ship oil cylinders 710 are respectively provided, which can be backed up by one oil cylinder, or the load of a single oil cylinder can be reduced through the coordinated work of two oil cylinders, improving the service life of the equipment.

[0055] In addition, it should be noted that for other moving components on the pile driver equipment, other branch modules can be provided in parallel on the hydraulic system provided in the embodiments of the present invention to meet the different driving requirements for different equipment. In some embodiments of the present invention, as Figure 1 and Figure 7 shown, a branch module with a winch hoist motor 810 as the execution unit is provided on the main oil path. By setting control components such as a directional control valve and a flow regulating valve, the winch hoist can be driven to achieve stable rope winding and unwinding actions. In practical applications, such as in the lifting unit or hoisting unit of the pile driver equipment, the winch hoist motor 810 can drive the winch to rotate, and lift or lower heavy objects by winding and unwinding the steel wire rope, providing power support for the vertical transportation of heavy objects; and by setting control elements such as the directional control valve and throttle valve in the branch module, the rotation speed and torque of the winch hoist can be accurately controlled to meet the requirements for the lifting or lowering speed and traction force under different load conditions, improving the working efficiency and reliability of the equipment.

[0056] Specifically, as Figure 7 and Figure 8 shown, Figure 7A three-position four-way directional control valve 8110 is provided on the branch circuit corresponding to the winch hoist motor 810 on the left side. When the three-position four-way directional control valve 8110 is in the middle position, the winch hoist motor 810 stops running, and due to the middle position structure of this O-type three-position four-way directional control valve 8110, pressure is maintained for the winch hoist motor 810, so that Figure 8 the winch hoist 920 in it stably maintains its current state; when the a side of the three-position four-way directional control valve 8110 is energized and switched to the right position, hydraulic oil enters from the left side of the winch hoist motor 810 and is discharged from the right side of the winch hoist motor 810. The winch hoist motor 810 drives the winch hoist 920 to perform a clockwise rotation action to realize the lowering action of the heavy object connected thereto through the transmission structure; when the b side of the three-position four-way directional control valve 8110 is energized and switched to the left position, hydraulic oil enters from the right side of the winch hoist motor 810 and is discharged from the left side of the winch hoist motor 810. The winch hoist motor 810 drives the winch hoist 920 to perform a counterclockwise rotation action to realize the lifting action of the heavy object connected thereto through the transmission structure.

[0057] It should be noted that the driving methods of other rotation motor structures in the embodiments of the present invention for the winch hoist 920 are similar to those of the above winch hoist motor 810, and will not be elaborated herein.

[0058] Similarly, a branch module with the clamping box advancing and retreating cylinder 820 as the execution unit can also be provided on the main oil circuit. It usually cooperates with the clamping cylinder. Among the components in the pile driver equipment that need to perform operations such as clamping, holding, or releasing an object, the clamping box advancing and retreating cylinder 820 can realize the forward and backward actions of the clamping box under the control of the hydraulic system. It can drive the clamping cylinder to move to the position for clamping components such as the pile body, and after waiting for the clamping cylinder to clamp and lock the target equipment, then realize the transfer of the target equipment through the clamping box advancing and retreating cylinder 820 to complete the clamping and moving process of the target equipment; the loosening process of the target equipment in the corresponding area is the same.

[0059] In addition, a branch module with the lifting rod fixing cylinder 830 as the execution unit is also provided on the main oil circuit for driving the lifting rod to act. It should be noted that for the lifting rod fixing cylinder 830, it needs to bear a large lifting force. Therefore, a single lifting rod fixing cylinder 830 includes four cylinder groups to cooperate to realize the action of the lifting cylinder.

[0060] It should be noted that for the hydraulic system provided in the embodiments of the present invention, other branch modules can also be arranged in parallel in the main oil circuit to drive other execution units, such as the lifting cylinder, pressing cylinder, and positioning cylinder of the hose transition mechanism. Each single branch module realizes the switching of oil supply and return through a reversing valve, and an overflow valve, a hydraulic lock 330, or a flow regulating valve is set according to application requirements to meet the driving requirements of different structural components on the pile driver equipment and achieve the integrated setting of the driving structure of the pile driver equipment. It should also be noted that for other branch modules arranged in parallel on the main oil circuit, the pipeline systems and valve structures with the same or similar structures as those in the foregoing embodiments are also within the protection scope of the present invention, and will not be elaborated herein one by one.

[0061] Furthermore, in the hydraulic system provided in the embodiments of the present invention, the oil supply pump 20, as the core power source of the hydraulic system, its performance is directly related to the operation efficiency and stability of the entire system. In some embodiments of the present invention, the oil supply pump 20 adopts a combined form of two hydraulic pump groups 230 arranged in parallel and a booster pump group 240 to achieve flexible supply of different pressures and flows, meeting the diverse requirements of multiple execution units in the system under different working conditions. Among them, the working pressure of the hydraulic pump group 230 is set between 14 MPa and 15 MPa to meet the requirements of the oil pressure for a general hydraulic system under normal working conditions. During normal operation, for example, in conventional operations such as the lifting and rotation of the power head and the support of the outriggers, the hydraulic pump group 230 can stably provide pressure oil of 14 MPa - 15 MPa, ensuring that each execution unit can operate stably and efficiently. Whether it is to push a heavy load or perform fine motion adjustment, it can complete the task with ease, providing sufficient and reliable power support for the daily operation of the equipment.

[0062] The working pressure of the booster pump group 240 is set between 24 MPa and 26 MPa. Compared with the hydraulic pump group 230, the booster pump group 240 can provide a higher pressure. In some special working scenarios, such as driving special execution elements in a high-intensity working environment or when higher pressure is required to complete certain special tasks in specific technological processes, it can timely supply high-pressure oil that meets the requirements; the setting of the booster pump group 240 can effectively meet the high-pressure requirements in these special scenarios, enabling the entire hydraulic system to flexibly respond when facing a complex and changeable working environment and fully ensuring the smooth progress of various operations.

[0063] The configuration of the hydraulic pump group 230 and the booster pump group 240 and their parallel arrangement in the oil supply pump 20 enable the oil supply system to automatically switch the oil supply pressure under different working conditions, achieve precise control and flexible supply of the oil pressure, and improve the intelligent adjustment degree of the oil supply pressure.

[0064] Furthermore, an embodiment of the present invention further provides a pile driver device, which includes the hydraulic system provided in any of the above embodiments to drive and control each component in the pile driver device. The cooperation or independent adjustment of each component can meet the strict requirements of pile foundation construction under different working conditions. It should be noted that since the above hydraulic system has the technical effects provided in any of the above embodiments, this pile driver device also has the above technical effects, which will not be elaborated herein again.

[0065] The terms "first", "second", "left side" and "right side" in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic system, characterized in that: include: An oil tank and an oil supply pump, wherein a plurality of parallel branch modules are arranged on the main oil circuit of the oil supply pump, wherein the branch modules include a reversing valve and an execution unit, wherein a single reversing valve includes at least two working positions to switch the oil supply and return states in the corresponding branch module, and the execution unit is a hydraulic cylinder or a hydraulic motor to execute linear motion or rotational motion; A pilot-type overflow valve and a two-position three-way solenoid reversing valve are provided in the oil supply pump. The two-position three-way solenoid reversing valve connects the pilot oil circuit in the pilot overflow valve and the oil tank; the pilot overflow valve is normally closed, and the two-position three-way solenoid reversing valve is normally open to maintain a unloading state. After the two-position three-way solenoid reversing valve is energized and closed, the pilot overflow valve opens a passage to overflow and release pressure when the oil supply pressure in the oil supply pump reaches a first preset pressure.

2. The hydraulic system according to claim 1, characterized in that: A first branch module is arranged on the main oil circuit, and a three-position four-way reversing valve is arranged on the first branch module; a power head lifting cylinder is arranged downstream of the three-position four-way reversing valve, and a hydraulic lock and a double one-way throttle valve are arranged on the oil circuit between the three-position four-way reversing valve and the power head lifting cylinder, and the double one-way throttle valve is used to limit the oil supply flow of the power head lifting cylinder.

3. The hydraulic system according to claim 2, characterized in that: The main oil circuit is also provided with a second branch module connected in parallel with the first branch module, the second branch module is provided with a three-position four-way reversing valve, and a power head motor is provided downstream of the three-position four-way reversing valve; the second branch module is provided with a double one-way throttle valve to adjust the oil supply flow of the power head motor, and the supply and return oil circuits of the second branch module are both provided with an overflow valve with a set value of a second preset pressure and connected to the main return oil circuit.

4. The hydraulic system according to claim 3, characterized in that: The first branch modules are arranged in three groups in parallel on the main oil circuit, and the three power head lifting cylinders cooperate to realize the lifting and lowering drive requirements of the power head; the second branch modules are arranged in two groups in parallel on the main oil circuit, and the two power head motors cooperate to realize the rotation drive requirements of the power head.

5. The hydraulic system according to claim 3, characterized in that: The three-position four-way reversing valve on the first branch module is a Y-type three-position four-way reversing valve; the three-position four-way reversing valve on the second branch module is an O-type three-position four-way reversing valve.

6. The hydraulic system according to claim 3, characterized in that: The main oil circuit is also provided with four sets of third branch modules, each of which includes a three-position four-way reversing valve and an outrigger oil cylinder arranged downstream of the three-position four-way reversing valve, and the four outrigger oil cylinders are used to drive the outriggers to achieve stable support on the setting surface; The oil circuit corresponding to the rod chamber of the outrigger oil cylinder is provided with a first one-way valve, and the first one-way valve is connected to a control oil circuit, and an electromagnetic two-position reversing valve is provided on the control oil circuit to adjust the opening and closing of the first one-way valve.

7. The hydraulic system according to claim 6, characterized in that The main oil circuit is also provided with two groups of fourth branch modules and two groups of fifth branch modules, the fourth branch module is provided with a large ship oil cylinder, a three-position four-way reversing valve for adjusting the oil supply and return state of the large ship oil cylinder, and a double one-way throttle valve for limiting the oil supply flow of the large ship oil cylinder; The fifth branch module is provided with a boat oil cylinder, a three-position four-way reversing valve for adjusting the oil supply and return state of the boat oil cylinder, and a double one-way throttle valve for limiting the oil supply flow of the boat oil cylinder.

8. The hydraulic system according to claim 7, characterized in that: The main oil circuit is also provided with branch modules which are arranged in parallel and respectively use the winch motor, the pressure box advance and retreat cylinder, and the lifting rod fixing cylinder as the execution units.

9. The hydraulic system according to claim 1, characterized in that: The oil supply pump includes two hydraulic pump groups and a booster pump group arranged in parallel; the working pressure of the hydraulic pump group is 14MPa-15MPa, and the working pressure of the pressure pump group is 24MPa-26MPa.

10. A pile driver, characterized in that: A hydraulic system as described in any one of claims 1 to 9 is used to control the drive of various components.

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