Pile driver hydraulic control system

Abstract

The present disclosure provides a hydraulic control system for a pile driver, comprising: a pumping device, comprising a first main pump and a second main pump; a plurality of actuators, configured to drive the pile driver to perform a pile driver tool action, the plurality of actuators comprising a tool vibration motor; an oil supply valve group, arranged between the pumping device and the plurality of actuators, the oil supply valve group having a first working state, a second working state and a third working state, in the first working state of the oil supply valve group, the first main pump supplies oil to the actuators other than the tool vibration motor alone, in the second working state of the oil supply valve group, the first main pump supplies oil to the tool vibration motor alone, in the third working state of the oil supply valve group, the first main pump and the second main pump simultaneously supply oil to the tool vibration motor; and a first control valve group, arranged between the pumping device and the oil supply valve group, the first control valve group being configured to switch the working state of the oil supply valve group. The present disclosure is conducive to improving the safety of pile driver operation.

Description

Technical Field

[0001] The present disclosure relates to the field of engineering machinery, and in particular to a hydraulic control system for a pile driver. Background Art

[0002] In construction projects, pile drivers are widely used in excavation and enclosure of foundation pits, trenches, pipelines, basements and other retaining and water-retaining projects in subway stations, tunnels, bridge cofferdams, revetments, municipal engineering, and civil engineering projects. The objects hit by pile drivers include: steel plates, I-beams, channel steels, cylinders, etc. Pile drivers need to have the functions of clamping piles, vibrating, and rotating. At present, the construction objects of pile drivers are mainly extended steel plates and cylinders, with a length of 6 to 18 meters, which requires high safety and reliability of pile driver operation.

[0003] Traditional hydraulic control systems of pile drivers are modified and matched by pile driver manufacturers on the market based on their experience. The operation control unit is a rocker switch temporarily bound to the operating handle. The second-speed vibration booster of the pile driver is achieved by modifying the travel pipeline of the hydraulic system. This operation requires opening the solenoid valve that controls the reversal of the travel pipeline, and then stepping on the travel pedal and the pile driver vibration pedal at the same time to achieve the purpose of the second-speed booster.

[0004] The operating comfort and safety of the hydraulic control system of the above-mentioned pile driver are poor; the vibration second-speed power increase is achieved by modifying the travel pipeline, which is cumbersome to operate, has high modification costs, and messy pipelines, which is not conducive to subsequent maintenance; in addition, the pile drivers modified on the market are poorly matched with the hydraulic system of the whole vehicle, resulting in high fuel consumption and low efficiency. Summary of the invention

[0005] The present disclosure provides a pile driver hydraulic control system, comprising:

[0006] A pumping device, comprising a first main pump and a second main pump;

[0007] A plurality of actuators, configured to drive the pile driver to perform pile driving tool actions, the plurality of actuators comprising a tool vibration motor;

[0008] an oil supply valve group, arranged between the pumping device and the plurality of actuators, the oil supply valve group having a first working state, a second working state and a third working state, in the first working state of the oil supply valve group, the first main pump alone supplies oil to the actuators except the tool vibration motor, in the second working state of the oil supply valve group, the first main pump alone supplies oil to the tool vibration motor, and in the third working state of the oil supply valve group, the first main pump and the second main pump simultaneously supply oil to the tool vibration motor; and

[0009] The first control valve group is arranged between the pumping device and the oil supply valve group, and the first control valve group is configured to switch the working state of the oil supply valve group.

[0010] According to some embodiments of the present disclosure, the oil supply valve group includes a first hydraulically controlled valve, a second hydraulically controlled valve, a third hydraulically controlled valve and a one-way valve, the oil inlet of the first hydraulically controlled valve is connected to the first oil outlet of the third hydraulically controlled valve, the oil outlet of the first hydraulically controlled valve is connected to an oil drain pipeline, the oil inlet of the second hydraulically controlled valve is connected to the oil outlet of the second main pump, the oil outlet of the second hydraulically controlled valve is connected to the oil drain pipeline, the oil inlet of the third hydraulically controlled valve is connected to the oil outlet of the first main pump, the second oil outlet of the third hydraulically controlled valve is connected to the oil inlet of the tool vibration motor, and the oil inlet and oil outlet of the one-way valve are respectively connected to the oil outlet of the second main pump and the oil inlet of the third hydraulically controlled valve, wherein the working state of the oil supply valve group is switched by controlling the on and off of the first hydraulically controlled valve, the second hydraulically controlled valve and the third hydraulically controlled valve.

[0011] According to some embodiments of the present disclosure,

[0012] The pumping device includes a third main pump, and the third main pump is configured to supply oil to the first control valve group;

[0013] The first control valve group includes a first proportional valve, a second proportional valve and a foot valve. The oil inlets of the first proportional valve, the second proportional valve and the foot valve are connected to the oil outlet of the third main pump. The oil outlets of the first proportional valve, the first proportional valve, the second proportional valve and the foot valve are respectively connected to the hydraulic control ends of the first hydraulic control valve, the second hydraulic control valve and the third hydraulic control valve. The first proportional valve, the second proportional valve and the foot valve are respectively used to control the on and off of the first hydraulic control valve, the second hydraulic control valve and the third hydraulic control valve.

[0014] According to some embodiments of the present disclosure,

[0015] The plurality of actuators include a machine rotary motor, the pile driver hydraulic control system includes a first hydraulically controlled reversing valve disposed between the oil outlet of the first main pump and the machine rotary motor for controlling the rotation direction of the machine rotary motor, the oil inlet of the first hydraulically controlled reversing valve being connected to the oil outlet of the first main pump, the oil outlet of the first hydraulically controlled reversing valve being connected to the oil outlet pipeline, the first working oil port and the second working oil port of the first hydraulically controlled reversing valve being connected to the two working ports of the machine rotary motor respectively; and / or,

[0016] The multiple actuators include a tool pile clamp cylinder, and the pile driver hydraulic control system includes a second hydraulically controlled reversing valve arranged between the oil outlet of the first main pump and the tool pile clamp cylinder for controlling the moving direction of the movable part of the tool pile clamp cylinder, the oil inlet of the second hydraulically controlled reversing valve is connected to the oil outlet of the first main pump, the oil discharge port of the second hydraulically controlled reversing valve is connected to the oil discharge pipeline, and the first working oil port and the second working oil port of the second hydraulically controlled reversing valve are respectively connected to the rod chamber and the rodless chamber of the tool pile clamp cylinder.

[0017] According to some embodiments of the present disclosure, the pile driver hydraulic control system includes:

[0018] a first one-way relief valve and a second one-way relief valve, the oil inlet of the first one-way relief valve and the oil inlet of the second one-way relief valve are respectively connected to the first working oil port of the first hydraulically controlled reversing valve and the second working oil port of the first hydraulically controlled reversing valve, and the oil outlet of the first one-way relief valve and the oil outlet of the second one-way relief valve are connected to the oil drain pipeline; and / or,

[0019] A third one-way relief valve and a fourth one-way relief valve, the oil inlet of the third one-way relief valve and the oil inlet of the fourth one-way relief valve are respectively connected to the first working oil port of the second hydraulically controlled reversing valve and the second working oil port of the second hydraulically controlled reversing valve, and the oil outlet of the third one-way relief valve and the oil outlet of the fourth one-way relief valve are connected to the oil drain pipeline.

[0020] According to some embodiments of the present disclosure, the pile driver control system includes a second control valve group, and the second control valve group includes:

[0021] a third proportional valve and a fourth proportional valve, the third proportional valve and the fourth proportional valve are used to control the switching of the first hydraulically controlled reversing valve, the oil inlets of the third proportional valve and the fourth proportional valve are connected to the oil outlet of the third main pump, and the oil outlets of the third proportional valve and the fourth proportional valve are respectively connected to the first hydraulically controlled end and the second hydraulically controlled end of the first hydraulically controlled reversing valve; and / or,

[0022] The fifth proportional valve and the sixth proportional valve are used to control the switching of the second hydraulically controlled reversing valve. The oil inlets of the fifth proportional valve and the sixth proportional valve are connected to the oil outlet of the third main pump, and the oil outlets of the fifth proportional valve and the sixth proportional valve are respectively connected to the first hydraulically controlled end and the second hydraulically controlled end of the second hydraulically controlled reversing valve.

[0023] According to some embodiments of the present disclosure, the pile driver hydraulic control system includes a hydraulically controlled one-way valve arranged between the second hydraulically controlled reversing valve and the tool pile clamping cylinder, the control port of the hydraulically controlled one-way valve is respectively connected to the rod chamber of the tool pile clamping cylinder and the first working oil port of the second hydraulically controlled reversing valve, the oil inlet of the hydraulically controlled one-way valve is connected to the second working oil port of the second hydraulically controlled reversing valve, and the oil outlet of the hydraulically controlled one-way valve is connected to the rodless chamber of the tool pile clamping cylinder.

[0024] According to some embodiments of the present disclosure, the pile driver hydraulic control system includes:

[0025] a controller electrically connected to the first control valve group and the second control valve group; and

[0026] The control handle includes a plurality of control buttons, wherein the plurality of control buttons are electrically connected to the controller, and the controller is configured to receive control signals from the control buttons and control the operation of the first control valve group and the second control valve group according to the control signals.

[0027] According to some embodiments of the present disclosure, the pile driver hydraulic control system includes a first pressure sensor for detecting the pile clamping pressure of the machine pile clamping cylinder, the controller is electrically connected to the first pressure sensor, and the controller is configured to receive a pressure signal from the first pressure sensor and control the operation of the first control valve group and the second control valve group according to the pressure signal.

[0028] According to some embodiments of the present disclosure, the controller is configured to connect the first proportional valve to cut off the first hydraulically controlled valve, and connect the fifth proportional valve to connect the first hydraulically controlled end of the second hydraulically controlled reversing valve when the clamping pile pressure detected by the first pressure sensor is lower than a set safety value.

[0029] According to some embodiments of the present disclosure, the control handle includes a first control button, and the first control button is slidably disposed on the control handle.

[0030] According to some embodiments of the present disclosure, the first control button has an initial position and a first sliding area, and the controller is configured to connect the first proportional valve to cut off the first hydraulic control valve, connect the sixth proportional valve to connect the second hydraulic control end of the second hydraulic control reversing valve, and disconnect the first proportional valve to connect the first hydraulic control valve, and disconnect the sixth proportional valve to cut off the second hydraulic control end of the second hydraulic control reversing valve, when receiving a control signal that the first control button slides from the first sliding area to the initial position.

[0031] According to some embodiments of the present disclosure, the first control button has an initial position and a second sliding area, and the controller is configured to connect the first proportional valve to cut off the first hydraulic control valve, connect the fifth proportional valve to connect the first hydraulic control end of the second hydraulic control reversing valve, and disconnect the first proportional valve to connect the first hydraulic control valve, and disconnect the fifth proportional valve to cut off the first hydraulic control end of the second hydraulic control reversing valve, when receiving a control signal that the first control button slides from the second sliding area to the initial position.

[0032] According to some embodiments of the present disclosure, the pile driver hydraulic control system includes a second pressure sensor for detecting the on / off status of the foot valve, the second pressure sensor is arranged on the pipeline between the oil outlet of the foot valve and the hydraulic control end of the third hydraulic control valve, the controller is electrically connected to the second pressure sensor, and the controller is configured to receive a pressure signal from the second pressure sensor and control the operation of the first control valve group and the second control valve group of the proportional valve group according to the pressure signal.

[0033] According to some embodiments of the present disclosure, the controller is configured to connect the first proportional valve to cut off the first hydraulically controlled valve, disconnect the third proportional valve to cut off the first hydraulically controlled end of the first hydraulically controlled reversing valve, and disconnect the fourth proportional valve to cut off the second hydraulically controlled end of the first hydraulically controlled reversing valve when the second pressure sensor detects a pressure signal.

[0034] According to some embodiments of the present disclosure, the control handle includes a second control button, and the controller is configured to connect the second proportional valve to cut off the second hydraulic control valve when receiving a control signal that the second control button is pressed, and disconnect the second proportional valve to connect the second hydraulic control valve when receiving a control signal that the second control button is released.

[0035] According to some embodiments of the present disclosure, the control handle includes a third control button, which has an on state and a off state. When the controller receives a control signal that the third control button is switched to the on state, the fifth proportional valve is connected to connect the first hydraulic control end of the second hydraulically controlled reversing valve.

[0036] According to some embodiments of the present disclosure, the control handle includes a fourth control button, and the fourth control button is slidably disposed on the control handle.

[0037] According to some embodiments of the present disclosure, the fourth control button has an initial position and a first sliding area. The controller is configured to connect the first proportional valve to cut off the first hydraulic control valve, connect the third proportional valve to connect the first hydraulic control end of the first hydraulic control reversing valve, and disconnect the first proportional valve to connect the first hydraulic control valve, and disconnect the third proportional valve to cut off the first hydraulic control end of the first hydraulic control reversing valve, when receiving a control signal that the fourth control button slides from the first sliding area to the initial position.

[0038] According to some embodiments of the present disclosure, the fourth control button has an initial position and a second sliding area, and the controller is configured to connect the first proportional valve to cut off the first hydraulically controlled valve, connect the fourth proportional valve to connect the second hydraulically controlled end of the first hydraulically controlled reversing valve, and disconnect the first proportional valve to connect the first hydraulically controlled valve, and disconnect the fourth proportional valve to cut off the second hydraulically controlled end of the first hydraulically controlled reversing valve, when receiving a control signal that the fourth control button slides from the second sliding area to the initial position.

[0039] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0041] Figure 1 The hydraulic principle diagram of the hydraulic control system of a pile driver according to some embodiments of the present disclosure.

[0042] Figure 2 Schematic diagram of a control handle according to some embodiments of the present disclosure.

[0043] Figure 3 The control principle diagram of some embodiments of the present invention is disclosed when the automatic pressure-maintaining pile clamping function of the pile driver is turned off.

[0044] Figure 4 The control principle diagram of some embodiments of the present invention is disclosed when the automatic pressure-maintaining pile clamping function of the pile driver is turned on.

[0045] Figures 1 to 4 In the figure, each reference numeral represents:

[0046] 1—Pumping device; 1.1—First main pump; 1.2—Second main pump; 1.3—Third main pump; 2—Oil supply valve group; 2.1—First hydraulic control valve; 2.2—Second hydraulic control valve; 2.3—Third hydraulic control valve; 2.4—One-way valve; 3—Tool vibration motor; 4—Oil return filter; 5—Tool swing motor; 6—First hydraulic control reversing valve; 6.1—First one-way overflow valve; 6.2—Second one-way overflow valve; 7—Tool pile clamp cylinder; 8—Hydraulic control one-way valve; 9—First pressure sensor; 10—Second hydraulic control reversing valve; 10.1—Third one-way overflow valve; 10.2—Fourth one-way overflow valve; 11—Second pressure sensor; 12—First control valve group; 12.1—First proportional valve; 12.2— Second proportional valve; 12.3—foot valve; 13—second control valve group; 13.1—third proportional valve; 13.2—fourth proportional valve; 13.3—fifth proportional valve; 13.4—sixth proportional valve; 14—hydraulic oil tank; 15A—left control handle; 15B—right control handle; 15.1—first control button; 15.1(a)—first sliding area of ​​the first control button; 15.1(b)—second sliding area of ​​the first control button; 15.2—second control button; 15.3—third control button; 15.4—fourth control button; 15.4(a)—first sliding area of ​​the fourth control button; 15.4(b)—second sliding area of ​​the fourth control button; 16—controller. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0048] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0049] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0050] like Figure 1 As shown, the pile driver hydraulic control system provided by some embodiments of the present disclosure includes a pumping device 1, a plurality of actuators, an oil supply valve group 2 and a first control valve group 12.

[0051] The pumping device 1 comprises a first main pump 1.1 and a second main pump 1.2 connected in parallel.

[0052] The plurality of actuators are drivingly connected to the pile driver and are configured to drive the pile driver to perform the pile driver action. The plurality of actuators include a vibration motor 3 for the pile driver.

[0053] The oil supply valve group 2 is arranged between the pumping device 1 and a plurality of actuators. The oil supply valve group 2 has a first working state, a second working state and a third working state. In the first working state of the oil supply valve group 2, the first main pump 1.1 supplies oil to the actuators other than the tool vibration motor 3 alone. In the second working state of the oil supply valve group 2, the first main pump 1.1 supplies oil to the tool vibration motor 3 alone. In the third working state of the oil supply valve group 2, the first main pump 1.1 and the second main pump 1.2 supply oil to the tool vibration motor 3 at the same time. The oil supply valve group 2 has different oil supply modes in different working states. According to the different oil supply flow rates of the pumping device 1, the tool vibration motor 3 can achieve vibrations of different gears.

[0054] The first control valve group 12 is disposed between the pumping device 1 and the oil supply valve group 2 , and the first control valve group 12 is configured to switch the working state of the oil supply valve group 2 .

[0055] In some embodiments, the oil supply valve group 2 includes a first hydraulically controlled valve 2.1, a second hydraulically controlled valve 2.2, a third hydraulically controlled valve 2.3 and a one-way valve 2.4, the oil inlet of the first hydraulically controlled valve 2.1 is connected to the first oil outlet of the third hydraulically controlled valve 2.3, the oil outlet of the first hydraulically controlled valve 2.1 is connected to the oil discharge pipeline, the oil inlet of the second hydraulically controlled valve 2.2 is connected to the oil outlet of the second main pump 1.2, the oil outlet of the second hydraulically controlled valve 2.2 is connected to the oil discharge pipeline, and the oil inlet of the second hydraulically controlled valve 2.2 is connected to the oil outlet of the second main pump 1.2. The oil inlet of the third hydraulically controlled valve 2.3 is connected to the oil outlet of the first main pump 1.1, the second oil outlet of the third hydraulically controlled valve 2.3 is connected to the oil inlet of the machine vibration motor 3, and the oil inlet and oil outlet of the one-way valve 2.4 are respectively connected to the oil outlet of the second main pump 1.2 and the oil inlet of the third hydraulically controlled valve 2.3, wherein the working state of the oil supply valve group 2 is switched by controlling the on-off of the first hydraulically controlled valve 2.1, the second hydraulically controlled valve 2.2 and the third hydraulically controlled valve 2.3.

[0056] In some embodiments, the pumping device 1 includes a third main pump 1.3, which is connected in parallel with the first main pump 1.1 and the second main pump 1.2, and the third main pump 1.3 is configured to supply oil to the first control valve group 12; the first control valve group 12 includes a first proportional valve 12.1, a second proportional valve 12.2 and a foot valve 12.3, the oil inlets of the first proportional valve 12.1, the second proportional valve 12.2 and the foot valve 12.3 are connected to the oil outlet of the third main pump 1.3, the oil outlets of the first proportional valve 12.1, the first proportional valve 12.1, the second proportional valve 12.2 and the foot valve 12.3 are respectively connected to the hydraulic control ends of the first hydraulic control valve 2.1, the second hydraulic control valve 2.2 and the third hydraulic control valve 2.3, and the first proportional valve 12.1, the second proportional valve 12.2 and the foot valve 12.3 are respectively used to control the on and off of the first hydraulic control valve 2.1, the second hydraulic control valve 2.2 and the third hydraulic control valve 2.3. The first proportional valve 12.1 and the second proportional valve 12.2 may be proportional pressure reducing valves.

[0057] From the above connection relationship, it can be seen that by cutting off the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 and connecting the oil inlet and the second oil outlet of the third hydraulic control valve 2.3, the oil supply valve group 2 is in the second working state, the first main pump 1.1 supplies oil to the machine vibration motor 3, and the pile driving machine can achieve first-gear vibration; by cutting off the second hydraulic control valve 2.2, connecting the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 and cutting off the oil inlet and the second oil outlet of the third hydraulic control valve 2.3, the oil supply valve group 2 is in the third working state, the first main pump 1.1 and the second main pump 1.2 simultaneously supply oil to the machine vibration motor 3, and the pile driving machine can achieve second-gear vibration.

[0058] In some embodiments, multiple actuators include a tool rotation motor 5 for performing a pile driver tool rotation operation, and the pile driver hydraulic control system includes a first hydraulically controlled reversing valve 6 arranged between the oil outlet of the first main pump 1.1 and the tool rotation motor 5 for controlling the rotation direction of the tool rotation motor 5. The oil inlet of the first hydraulically controlled reversing valve 6 is connected to the oil outlet of the first main pump 1.1, the oil outlet of the first hydraulically controlled reversing valve 6 is connected to the oil outlet pipeline, and the first working oil port and the second working oil port of the first hydraulically controlled reversing valve 6 are respectively connected to the two working ports of the tool rotation motor 5.

[0059] From the above connection relationship, it can be seen that when the first hydraulic control valve 2.1 is cut off, the oil supply valve group 2 is in the first working state, the first main pump 1.1 supplies oil to one of the two working ports of the machine rotary motor 5, and the pile driver can realize bidirectional rotation.

[0060] In some embodiments, the plurality of actuators include a machine pile clamping cylinder 7 for performing the pile clamping / loosening operation of the pile driver. The pile driver hydraulic control system includes a second hydraulically controlled reversing valve 10 disposed between the oil outlet of the first main pump 1.1 and the machine pile clamping cylinder 7 for controlling the moving direction of the movable part of the machine pile clamping cylinder 7. The oil inlet of the second hydraulically controlled reversing valve 10 is connected to the oil outlet of the first main pump 1.1, the oil outlet of the second hydraulically controlled reversing valve 10 is connected to the oil outlet pipeline, and the first working oil port and the second working oil port of the second hydraulically controlled reversing valve 10 are respectively connected to the rod chamber and the rodless chamber of the machine pile clamping cylinder 7.

[0061] From the above connection relationship, it can be seen that when the first hydraulic control valve 2.1 is cut off, the oil supply valve group 2 is in the first working state, and the first main pump 1.1 supplies oil to the rodless chamber or rod chamber of the machine pile clamping cylinder 7, and the pile driving machine can clamp or loosen the pile.

[0062] like Figure 1 As shown, in the first control valve group 12, the first proportional valve 12.1 can control the first hydraulic control valve 2.1 to cut off, thereby controlling the pile driving tool to rotate or clamp / loosen the pile.

[0063] like Figure 1 As shown, the foot valve 12.3 includes a pedal. When the pedal is pressed, the foot valve 12.3 is connected, thereby cutting off the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 and connecting the oil inlet and the second oil outlet of the third hydraulic control valve 2.3. When the pedal is released, the foot valve 12.3 is disconnected, thereby connecting the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 and cutting off the oil inlet and the second oil outlet of the third hydraulic control valve 2.3. The foot valve 12.3 can control the connection between the oil inlet and the second oil outlet of the third hydraulic control valve 2.3, and can control the vibration of the machine in the first gear. In the first control valve group 12, the second proportional valve 12.2 can control the cutting off of the second hydraulic control valve 2.2, and can control the vibration of the machine in the second gear together with the foot valve 12.3.

[0064] The first control valve group 12 and the second control valve group 13 can be configured with a controller and a control program accordingly, and the control strategy is: when controlling the pile driver to rotate, clamp piles / loosen piles or vibrate, the oil supply valve group 2 is controlled to switch the working state to achieve different actions of the machine. The different current setting values ​​in the control program can be used to adjust the flow of different actions. The pile driver can include a variety of pile driving modes, such as a steel sheet pile mode and a casing pile mode. Under different pile driving modes, the control program sets parameters according to the control habits and power matching under different construction conditions. In this way, the pile driver can achieve the matching of the hydraulic system flow by adjusting the control program when the pile driver is operating under different working conditions and different types of pile drivers. The operation is simple and convenient, which improves the problems of high fuel consumption and low efficiency of the hydraulic control system of the pile driver modified in the prior art.

[0065] In some embodiments, the pile driver hydraulic control system includes a first one-way relief valve 6.1 and a second one-way relief valve 6.2, the oil inlet of the first one-way relief valve 6.1 and the oil inlet of the second one-way relief valve 6.2 are respectively connected to the first working oil port of the first hydraulically controlled reversing valve 6 and the second working oil port of the first hydraulically controlled reversing valve 6, and the oil outlet of the first one-way relief valve 6.1 and the oil outlet of the second one-way relief valve 6.2 are connected to the oil drain pipeline.

[0066] In some embodiments, the pile driver hydraulic control system includes a third one-way relief valve 10.1 and a fourth one-way relief valve 10.2, the oil inlet of the third one-way relief valve 10.1 and the oil inlet of the fourth one-way relief valve 10.2 are respectively connected to the first working oil port of the second hydraulically controlled reversing valve 10 and the second working oil port of the second hydraulically controlled reversing valve 10, and the oil outlet of the third one-way relief valve 10.1 and the oil outlet of the fourth one-way relief valve 10.2 are connected to the oil drain pipeline.

[0067] In some embodiments, the pile driver control system includes a second control valve group 13 .

[0068] In some embodiments, the second control valve group 13 includes a third proportional valve 13.1 and a fourth proportional valve 13.2, which are used to control the switching of the first hydraulically controlled reversing valve 6. The oil inlets of the third proportional valve 13.1 and the fourth proportional valve 13.2 are connected to the oil outlet of the third main pump 1.3, and the oil outlets of the third proportional valve 13.1 and the fourth proportional valve 13.2 are respectively connected to the first hydraulically controlled end and the second hydraulically controlled end of the first hydraulically controlled reversing valve 6. The third proportional valve 13.1 and the fourth proportional valve 13.2 may be proportional pressure reducing valves.

[0069] In some embodiments, the second control valve group 13 includes a fifth proportional valve 13.3 and a sixth proportional valve 13.4, which are used to control the reversing of the second hydraulically controlled reversing valve 10, and the oil inlets of the fifth proportional valve 13.3 and the sixth proportional valve 13.4 are connected to the oil outlet of the third main pump 1.3, and the oil outlets of the fifth proportional valve 13.3 and the sixth proportional valve 13.4 are respectively connected to the first hydraulically controlled end and the second hydraulically controlled end of the second hydraulically controlled reversing valve 10. The fifth proportional valve 13.3 and the sixth proportional valve 13.4 may be proportional pressure reducing valves.

[0070] In some embodiments, the hydraulic control system of the pile driver includes a hydraulically controlled one-way valve 8 disposed between the second hydraulically controlled reversing valve 10 and the machine pile clamping cylinder 7, the control port of the hydraulically controlled one-way valve 8 is respectively connected to the rod chamber of the machine pile clamping cylinder 7 and the first working oil port of the second hydraulically controlled reversing valve 10, the oil inlet of the hydraulically controlled one-way valve 8 is connected to the second working oil port of the second hydraulically controlled reversing valve 10, and the oil outlet of the hydraulically controlled one-way valve 8 is connected to the rodless chamber of the machine pile clamping cylinder 7. The hydraulically controlled one-way valve 8 can keep the rodless chamber of the machine pile clamping cylinder 7 under pressure, thereby preventing the pile from falling off.

[0071] In order to better control the pile driver, the pile driver hydraulic control system may further include a controller 16 and a control handle.

[0072] The controller 16 is electrically connected to the first control valve group 12 and the second control valve group 13 .

[0073] The control handle includes a plurality of control buttons, which are electrically connected to the controller 16. The controller 16 is configured to receive control signals from the control buttons and control the first control valve group 12 and the second control valve group 13 to operate according to the control signals.

[0074] like Figure 1 As shown, in order to realize the left rotation, right rotation and stop of the tool rotary motor 5, the pressure of the two hydraulic control ends of the first hydraulic control reversing valve 6 can be changed by controlling the third proportional valve 13.1 and the fourth proportional valve 13.2, thereby controlling the pressure of the two working ports of the tool rotary motor 5 to control whether the tool rotary motor 5 rotates or the rotation direction. The first hydraulic control reversing valve 6 has a first working position ( Figure 1 The middle is the left position), the second working position ( Figure 1 The middle is the right position) and the third working position ( Figure 1The middle position is the middle position), and the corresponding machine rotary motor 5 performs right rotation, left rotation and stop operations respectively. Thus, the third proportional valve 13.1 is connected, the first hydraulic control end of the first hydraulic control reversing valve 6 is connected, the first hydraulic control reversing valve 6 is switched to the first working position, and the machine rotary motor 5 rotates right; the fourth proportional valve 13.2 is connected, the second hydraulic control end of the first hydraulic control reversing valve 6 is connected, the first hydraulic control reversing valve 6 is switched to the second working position, and the machine rotary motor 5 rotates left; the third proportional valve 13.1 and the fourth proportional valve 13.2 are not connected, the first hydraulic control end and the second hydraulic control end of the first hydraulic control reversing valve 6 are cut off, the first hydraulic control reversing valve 6 is switched to the third working position, and the machine rotary motor 5 stops. The first hydraulic control reversing valve 6 can adopt a three-position four-way hydraulic control reversing valve with an O-type middle position function.

[0075] like Figure 1 As shown, in order to achieve the clamping, loosening and stopping of the pile clamping cylinder 7, the pressure of the two hydraulic control ends of the second hydraulic control reversing valve 10 can be changed by controlling the fifth proportional valve 13.3 and the sixth proportional valve 13.4, thereby controlling the pressure of the two working ports of the pile clamping cylinder 7 to control whether the piston rod of the pile clamping cylinder 7 moves or the direction of extension and retraction. The second hydraulic control reversing valve 10 has a first working position ( Figure 1 The middle is the left position), the second working position ( Figure 1 The middle is the right position) and the third working position ( Figure 1 The middle position is the middle position), and the corresponding machine pile clamping cylinder 7 performs the operation of extending the piston rod, retracting the piston rod, and keeping the piston rod stationary. Thus, the fifth proportional valve 13.3 is connected, the first hydraulic control end of the second hydraulic control reversing valve 10 is connected, the second hydraulic control reversing valve 10 is switched to the first working position, the rodless chamber of the machine pile clamping cylinder 7 enters oil and the rod chamber returns oil, the piston rod extends, and the pile driver clamps the pile; the sixth proportional valve 13.4 is connected, the second hydraulic control end of the second hydraulic control reversing valve 10 is connected, the second hydraulic control reversing valve 10 is switched to the second working position, the rod chamber of the machine pile clamping cylinder 7 enters oil and the rodless chamber returns oil, the piston rod retracts, and the pile driver loosens the pile; the fifth proportional valve 13.3 and the sixth proportional valve 13.4 are not connected, the first hydraulic control end and the second hydraulic control end of the second hydraulic control reversing valve 10 are both cut off, the second hydraulic control reversing valve 10 is switched to the third working position, and the machine pile clamping cylinder 7 stops. The second hydraulically controlled reversing valve 10 may be a three-position four-way hydraulically controlled reversing valve with an O-type neutral position function.

[0076] Figure 3 and Figure 4 The control relationship of the pile driver hydraulic control system provided by the embodiment of the present disclosure is shown. Figure 3 and Figure 4In the figure, a1 to a7 represent control signals input to the controller 16, b1 to b7 represent control signals output by the controller 16 to each solenoid valve in the hydraulic control system of the pile driver, and c1 to c7 represent control signals output by each solenoid valve in the hydraulic control system of the pile driver to each hydraulic control valve in the hydraulic control system of the pile driver.

[0077] The pile driver hydraulic control system provided in the embodiment of the present disclosure can enable the pile driver to achieve first-gear vibration, second-gear vibration, left rotation, right rotation, pile clamping and pile loosening, etc. According to actual requirements, the control buttons on the controller 16 and the control handle can be configured accordingly.

[0078] In addition, a detection device can be set in the pile driver hydraulic control system. When the pressure, flow rate, flow velocity, etc. in the pile driver hydraulic control system are detected to be out of the set range, a control signal is sent to the controller to further improve the safety and reliability of the pile driver operation.

[0079] In some embodiments, the pile driver hydraulic control system includes a first pressure sensor 9 for detecting the pile clamping pressure of the machine pile clamping cylinder 7. The first pressure sensor 9 is arranged on the rodless cavity pipeline of the machine pile clamping cylinder 7. The controller 16 is electrically connected to the first pressure sensor 9. The controller 16 is configured to receive the pressure signal of the first pressure sensor 9 and control the operation of the first control valve group 12 and the second control valve group 13 according to the pressure signal.

[0080] The process of pulling piles by a pile driver requires a large lifting force. If the pile clamping pressure is insufficient during pile pulling, the pile driver may be out of pile. In order to reduce the risk of pile out, in the above embodiment, the controller 16 can be configured to connect the first proportional valve 12.1 to cut off the first hydraulic control valve 2.1, and connect the fifth proportional valve 13.3 to connect the first hydraulic control end of the second hydraulic control reversing valve 10 when the pile clamping pressure detected by the first pressure sensor 9 is lower than the set safety value.

[0081] The specific process of using the first pressure sensor 9 to detect the pile clamping pressure to reduce the risk of pile disengagement is as follows: the first pressure sensor 9 transmits the detected pile clamping pressure signal a6 to the controller 16; when the pile clamping pressure is lower than the set safety value, the controller 16 outputs an electrical signal b6 to connect the first proportional valve 12.1 and the fifth proportional valve 13.3 respectively; the first proportional valve 12.1 and the fifth proportional valve 13.3 output a hydraulic control signal c6, the first hydraulic control valve 2.1 is cut off, and the first hydraulic control end of the second hydraulic control reversing valve 10 is connected to allow oil to flow into the rodless chamber of the machine pile clamping cylinder 7, and the pile clamping pressure increases until it reaches a safety value.

[0082] The first pressure sensor 9 can be used in combination with the hydraulically controlled one-way valve 8 to provide dual protection against pile disengagement. On this basis, the controller 16 can also be configured to output an alarm signal when the clamping pressure detected by the first pressure sensor 9 is lower than a set safety value, thereby providing a pre-alarm for pile disengagement.

[0083] like Figure 2 As shown, in some embodiments, the control handle includes a first control button 15.1, which is slidably disposed on the control handle. By sliding the first control button 15.1 to different working positions, the controller 16 can output different electrical signals to enable the pile driver hydraulic control system to achieve the flow value required for controlling the pile driver to clamp and loosen the pile.

[0084] In some embodiments, the first control button 15.1 has an initial position and a first sliding area 15.1 (a). The first control button 15.1 is slid from the initial position to the first sliding area 15.1 (a), and the first control button 15.1 is released at this time, and the first control button 15.1 can return to the initial position. The controller 16 is configured to receive a control signal a1 indicating that the first control button 15.1 slides from the initial position to the first sliding area 15.1 (a), the controller 16 outputs a control signal b1, connects the first proportional valve 12.1 and the sixth proportional valve 13.4, the first proportional valve 12.1 outputs a control signal c1 to cut off the first hydraulic control valve 2.1, the sixth proportional valve 13.4 outputs a control signal c1 to connect the second hydraulic control end of the second hydraulic control reversing valve 10, and the tool pile clamp cylinder 7 performs a pile loosening action. When receiving the control signal that the first control button 15.1 slides from the first sliding area 15.1 (a) to the initial position, the first proportional valve 12.1 is disconnected to connect the first hydraulic control valve 2.1, and the sixth proportional valve 13.4 is disconnected to cut off the second hydraulic control end of the second hydraulic control reversing valve 10, and the machine pile clamp cylinder 7 stops moving.

[0085] The effect of the above configuration is: when the first control button 15.1 is slid from the initial position to the first sliding area 15.1(a), the pile driver performs the pile loosening action; when the first control button 15.1 is released, the first control button 15.1 slides from the first sliding area 15.1(a) to the initial position, and the pile driver stops the pile loosening action.

[0086] In some embodiments, the first control button 15.1 has an initial position and a second sliding area 15.1(b). When the first control button 15.1 is slid from the initial position to the second sliding area 15.1(b), the first control button 15.1 is released and the first control button 15.1 can be restored to the initial position. The controller 16 is configured to receive a control signal a3 indicating that the first control button 15.1 slides from the initial position to the second sliding area 15.1(b), the controller 16 outputs a control signal b3 to connect the first proportional valve 12.1 and the fifth proportional valve 13.3, the first proportional valve 12.1 outputs a control signal c3 to cut off the first hydraulic control valve 2.1, the fifth proportional valve 13.3 outputs a control signal c3 to connect the first hydraulic control end of the second hydraulic control reversing valve 10, and the tool pile clamping cylinder 7 performs the pile clamping action. When receiving the control signal that the first control button 15.1 slides from the second sliding area 15.1 (b) to the initial position, the first proportional valve 12.1 is disconnected to connect the first hydraulic control valve 2.1, and the fifth proportional valve 13.3 is disconnected to cut off the first hydraulic control end of the second hydraulic control reversing valve 10, and the machine pile clamp cylinder 7 stops moving.

[0087] The effect of the above configuration is: when the first control button 15.1 is slid from the initial position to the second sliding area 15.1(b), the pile driver performs the pile clamping action; when the first control button 15.1 is released, the first control button 15.1 slides from the second sliding area 15.1(b) to the initial position, and the pile driver stops the pile clamping action.

[0088] In some embodiments, the hydraulic control system of the pile driver includes a second pressure sensor 11 for detecting the on / off status of the foot valve 12.3, and the second pressure sensor 11 is arranged on the pipeline between the oil outlet of the foot valve 12.3 and the hydraulic control end of the third hydraulic control valve 2.3. If the foot valve 12.3 is turned on, the hydraulic control end of the third hydraulic control valve 2.3 is turned on, and the second pressure sensor 11 will detect a pressure signal. The controller 16 is electrically connected to the second pressure sensor 11, and the controller 16 is configured to receive the pressure signal of the second pressure sensor 11 and control the operation of the first control valve group 12 and the second control valve group 13 according to the pressure signal.

[0089] In some embodiments, the controller 16 is configured to connect the first proportional valve 12.1 to cut off the first hydraulically controlled valve 2.1, disconnect the third proportional valve 13.1 to cut off the first hydraulically controlled end of the first hydraulically controlled reversing valve 6, and disconnect the fourth proportional valve 13.2 to cut off the second hydraulically controlled end of the first hydraulically controlled reversing valve 6 when the second pressure sensor 11 detects a pressure signal.

[0090] The specific process of the second pressure sensor 11 participating in realizing the first-gear vibration of the pile driver is as follows: the foot valve 12.3 is turned on, the hydraulic control end of the third hydraulic control valve 2.3 is turned on, and the second pressure sensor 11 transmits the detected pressure signal a7 to the controller 16; the controller 16 outputs an electrical signal b7, turns on the first proportional valve 12.1, and disconnects the third proportional valve 13.1 and the fourth proportional valve 13.2; the first proportional valve 12.1 outputs a control signal c7 to cut off the first hydraulic control valve 2.1, and the tool vibration motor 3 performs a first-gear vibration action; the third proportional valve 13.1 outputs a control signal c7 to cut off the first hydraulic control end of the first hydraulic control reversing valve 6, and the fourth proportional valve 13.2 outputs a control signal c7 to cut off the second hydraulic control end of the first hydraulic control reversing valve 6, and the tool rotary motor 5 stops moving. The foot valve 12.3 is disconnected, the third hydraulic control valve 2.3 cuts off the oil outlet of the first main pump 1.1 and the oil inlet of the tool vibration motor 3, the second pressure sensor 11 cannot detect the pressure signal, and the tool vibration motor 3 stops moving.

[0091] The effect of the above configuration is: when the pedal valve 12.3 is stepped on, the pile driver performs a first-stage vibration action and cuts off the oil circuit for controlling the rotation action of the machine; when the pedal valve 12.3 is released, the pile driver stops the first-stage vibration action.

[0092] In some embodiments, the control handle includes a second control button 15.2. On the premise that the foot valve 12.3 is turned on, the controller 16 is configured to receive a control signal a2 when the second control button 15.2 is pressed, and the controller 16 outputs a control signal b2 to turn on the second proportional valve 12.2, and the second proportional valve 12.2 outputs a control signal c2 to cut off the second hydraulic control valve 2.2, and the first main pump 1.1 and the second main pump 1.2 simultaneously supply oil to the machine vibration motor 3, and the machine vibration motor 3 performs the second gear vibration action. When receiving a control signal that the second control button 15.2 is released, the second proportional valve 12.2 is disconnected to turn on the second hydraulic control valve 2.2, and the machine vibration motor 3 stops the second gear vibration action.

[0093] The effect of the above configuration is: under the premise that the foot valve 12.3 is turned on, pressing the second control button 15.2 causes the pile driver to perform the second-gear vibration action and cut off the oil circuit for controlling the rotation action of the machine; releasing the second control button 15.2 stops the second-gear vibration action of the pile driver, and the first-gear vibration action of the pile driver is still maintained.

[0094] According to the above configuration, during the vibration of the pile driver, the tool rotary motor 5 cannot rotate, which is conducive to better protecting the tool rotary motor 5.

[0095] In some embodiments, in order to realize the function of automatically maintaining pressure and clamping piles of the pile driver during the piling process, so as to reduce the risk of falling off the pile and improve the safety of operation, the control handle includes a third control button 15.3, and the third control button 15.3 has an on state and a off state, and the on state and the off state correspond to the on and off of the function of automatically maintaining pressure and clamping piles of the pile driver, respectively, and the switching of the two working states is realized by pressing the third control button 15.3. The controller 16 is configured to output an electrical signal b7 to connect the fifth proportional valve 13.3 when receiving a control signal that the third control button 15.3 is switched to the on state, and the fifth proportional valve 13.3 outputs a control signal c7 to connect the first hydraulic control end of the second hydraulically controlled reversing valve 10, and the pile clamping cylinder 7 of the machine performs the pile clamping action.

[0096] The effect of the above configuration is: when the foot valve 12.3 is stepped on and the third control button 15.3 is switched to the on state, the pile driver performs a first-gear vibration action, and at the same time performs a pile clamping action and cuts off the oil circuit for controlling the rotation action of the machine; under the premise that the foot valve 12.3 is turned on, the second control button 15.2 is pressed and the third control button 15.3 is switched to the on state, the pile driver performs a second-gear vibration action, and at the same time performs a pile clamping action and cuts off the oil circuit for controlling the rotation action of the machine.

[0097] Figure 3 and Figure 4 The control principle of the pile driver hydraulic control system in the two states of the automatic pressure-maintaining and pile-clamping function of the pile driver is shown respectively. According to the different piling modes of the pile driver, the automatic pressure-maintaining and pile-clamping function of the pile driver can be selected to be turned on and off accordingly. For example, in the aforementioned steel sheet pile mode, the automatic pressure-maintaining and pile-clamping function of the pile driver can be turned on to improve the efficiency of the piling operation; in the aforementioned casing pile mode, the automatic pressure-maintaining and pile-clamping function of the pile driver can be turned off to improve the safety of the piling operation. Figure 2 As shown, in some embodiments, the control handle includes a fourth control button 15.4, which is slidably disposed on the control handle. By sliding the fourth control button 15.4 to different working positions, the controller 16 can output different electrical signals to enable the pile driver hydraulic control system to reach the flow value required to control the rotation action of the pile driver.

[0098] In some embodiments, the fourth control button 15.4 has an initial position and a first sliding area 15.4 (a), and the fourth control button 15.4 can be slid from the initial position to the first sliding area 15.4 (a). At this time, the fourth control button 15.4 is released and the fourth control button 15.4 can be restored to the initial position. The controller 16 is configured to receive a control signal a4 indicating that the fourth control button 15.4 slides from the initial position to the first sliding area 15.4 (a), the controller 16 outputs a control signal b4, connects the first proportional valve 12.1 and the third proportional valve 13.1, the first proportional valve 12.1 outputs a control signal c4 to cut off the first hydraulic control valve 2.1, and the third proportional valve 13.1 outputs a control signal c4 to connect the first hydraulic control end of the first hydraulic control reversing valve 6, and the tool rotary motor 5 performs a right rotation action. When receiving the control signal that the fourth control button 15.4 slides from the first sliding area 15.4 (a) to the initial position, the first proportional valve 12.1 is disconnected to connect the first hydraulic control valve 2.1, and the third proportional valve 13.1 is disconnected to cut off the first hydraulic control end of the first hydraulic control reversing valve 6, and the tool rotary motor 5 stops moving.

[0099] The effect of the above configuration is: when the fourth control button 15.4 is slid from the initial position to the first sliding area 15.4(a), the pile driver performs a right rotation; when the fourth control button 15.4 is released, the fourth control button 15.4 slides from the first sliding area 15.4(a) to the initial position, and the pile driver stops the right rotation.

[0100] In some embodiments, the fourth control button 15.4 has an initial position and a second sliding area 15.4 (b), and the fourth control button 15.4 can be slid from the initial position to the second sliding area 15.4 (b). At this time, the fourth control button 15.4 is released and the fourth control button 15.4 can be restored to the initial position. The controller 16 is configured to receive a control signal a5 indicating that the fourth control button 15.4 slides from the initial position to the second sliding area 15.4 (b), the controller 16 outputs a control signal b5, connects the first proportional valve 12.1 and the fourth proportional valve 13.2, the first proportional valve 12.1 outputs a control signal c5 to cut off the first hydraulic control valve 2.1, and the fourth proportional valve 13.2 outputs a control signal c5 to connect the second hydraulic control end of the first hydraulic control reversing valve 6, and the tool rotary motor 5 performs a left rotation action. When receiving the control signal that the fourth control button 15.4 slides from the second sliding area 15.4 (b) to the initial position, the first proportional valve 12.1 is disconnected to connect the first hydraulic control valve 2.1, and the fourth proportional valve 13.2 is disconnected to cut off the second hydraulic control end of the first hydraulic control reversing valve 6, and the tool rotary motor 5 stops moving.

[0101] The effect of the above configuration is: when the fourth control button 15.4 is slid from the initial position to the second sliding area 15.4 (b), the pile driver performs a left rotation; when the fourth control button 15.4 is released, the fourth control button 15.4 slides from the second sliding area 15.4 (b) to the initial position, and the pile driver stops the left rotation. The first control button 15.1 and the fourth control button 15.4 can adopt automatic reset sliding buttons, so that the pile driver has the effect of sliding and moving, and releasing and stopping when performing the pile clamping, pile loosening and rotation actions. Compared with using a rocker switch to control the action of the pile driver, the risk of safety accidents caused by operator misoperation can be reduced. The value of the electrical signal output by the controller 16 is proportional to the sliding stroke of the first control button 15.1 and the fourth control button 15.4 relative to the initial position.

[0102] The various functions of the pile driver hydraulic control system can be integrated on the same set of control handles. Figure 2 The control handle shown comprises a left control handle 15A and a right control handle 15B, the fourth control button 15.4 being arranged on the left control handle 15A; the first control button 15.1, the second control button 15.2 and the third control button 15.3 being arranged on the right control handle 15B.

[0103] In some embodiments, the controller described above can be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof for performing the functions described in the present disclosure.

[0104] According to the description of the above embodiments, the embodiments of the present disclosure have at least one of the following beneficial effects:

[0105] The traditional pile driver hydraulic control system uses a walking pedal and a pile driver vibration pedal to control the vibration of the pile driver, and uses a rocker switch as an operation control unit for the pile driver's actions. In contrast, the disclosed embodiment configures an integrated multi-function handle and a corresponding controller in the pile driver hydraulic control system, thereby improving the safety, comfort and reliability of operations such as vibration, rotation, pile clamping and pile loosening of the pile driver.

[0106] Since the flow rate required for pile loosening / clamping and rotating actions of the pile driver is relatively small, the controller can output different electrical signals to the first control valve group and the second control valve group by sliding the corresponding control buttons to different strokes, thereby finely controlling the flow rate required for the pile driver to perform actions such as rotation, pile clamping and pile loosening, thereby improving the efficiency and accuracy of the pile driver in pile driving.

[0107] Compared with the modified pile driver hydraulic control system, the piping layout is simple and easy to repair and maintain.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution for protection requested by the present disclosure.

Claims

1. A pile driver hydraulic control system, characterized in that: include: A pumping device (1) comprising a first main pump (1.1) and a second main pump (1.2); A plurality of actuators, configured to drive the pile driver to perform pile driving tool actions, the plurality of actuators comprising a tool vibration motor (3); an oil supply valve group (2) disposed between the pumping device (1) and the plurality of actuators, the oil supply valve group (2) having a first working state, a second working state and a third working state, wherein in the first working state of the oil supply valve group (2), the first main pump (1.1) alone supplies oil to the actuators except the tool vibration motor (3), in the second working state of the oil supply valve group (2), the first main pump (1.1) alone supplies oil to the tool vibration motor (3), and in the third working state of the oil supply valve group (2), the first main pump (1.1) and the second main pump (1.2) simultaneously supply oil to the tool vibration motor (3); and a first control valve group (12) disposed between the pumping device (1) and the oil supply valve group (2), the first control valve group (12) being configured to switch the working state of the oil supply valve group (2); The oil supply valve group (2) comprises a first hydraulically controlled valve (2.1), a second hydraulically controlled valve (2.2), a third hydraulically controlled valve (2.3) and a one-way valve (2.4); an oil inlet of the first hydraulically controlled valve (2.1) is connected to a first oil outlet of the third hydraulically controlled valve (2.3); an oil outlet of the first hydraulically controlled valve (2.1) is connected to an oil discharge pipeline; an oil inlet of the second hydraulically controlled valve (2.2) is connected to an oil outlet of the second main pump (1.2); an oil outlet of the second hydraulically controlled valve (2.2) is connected to an oil discharge pipeline; and The oil inlet of the first hydraulic control valve (2.3) is connected to the oil outlet of the first main pump (1.1), the second oil outlet of the third hydraulic control valve (2.3) is connected to the oil inlet of the tool vibration motor (3), and the oil inlet and oil outlet of the one-way valve (2.4) are respectively connected to the oil outlet of the second main pump (1.2) and the oil inlet of the third hydraulic control valve (2.3), wherein the working state of the oil supply valve group (2) is switched by controlling the on and off of the first hydraulic control valve (2.1), the second hydraulic control valve (2.2) and the third hydraulic control valve (2.3).

2. The pile driver hydraulic control system according to claim 1, characterized in that: The pumping device (1) comprises a third main pump (1.3), wherein the third main pump (1.3) is configured to supply oil to the first control valve group (12); The first control valve group (12) comprises a first proportional valve (12.1), a second proportional valve (12.2) and a foot valve (12.3); the oil inlets of the first proportional valve (12.1), the second proportional valve (12.2) and the foot valve (12.3) are connected to the oil outlet of the third main pump (1.3); the oil outlets of the first proportional valve (12.1), the second proportional valve (12.2) and the foot valve (12.3) are respectively connected to the hydraulic control ends of the first hydraulic control valve (2.1), the second hydraulic control valve (2.2) and the third hydraulic control valve (2.3); the first proportional valve (12.1), the second proportional valve (12.2) and the foot valve (12.3) are respectively used to control the on and off of the first hydraulic control valve (2.1), the second hydraulic control valve (2.2) and the third hydraulic control valve (2.3).

3. The pile driver hydraulic control system according to claim 2, characterized in that: The plurality of actuators include a machine tool rotary motor (5), the pile driver hydraulic control system includes a first hydraulically controlled reversing valve (6) arranged between an oil outlet of the first main pump (1.1) and the machine tool rotary motor (5) for controlling the rotation direction of the machine tool rotary motor (5), the oil inlet of the first hydraulically controlled reversing valve (6) being connected to the oil outlet of the first main pump (1.1), the oil outlet of the first hydraulically controlled reversing valve (6) being connected to an oil outlet pipeline, the first working oil port and the second working oil port of the first hydraulically controlled reversing valve (6) being connected to two working ports of the machine tool rotary motor (5) respectively; and / or, The plurality of actuators include a machine pile clamping cylinder (7), and the pile driver hydraulic control system includes a second hydraulically controlled reversing valve (10) arranged between an oil outlet of the first main pump (1.1) and the machine pile clamping cylinder (7) for controlling the moving direction of a movable part of the machine pile clamping cylinder (7), an oil inlet of the second hydraulically controlled reversing valve (10) being connected to an oil outlet of the first main pump (1.1), an oil outlet of the second hydraulically controlled reversing valve (10) being connected to an oil outlet pipeline, and a first working oil outlet and a second working oil outlet of the second hydraulically controlled reversing valve (10) being respectively connected to a rod chamber and a rodless chamber of the machine pile clamping cylinder (7).

4. The pile driver hydraulic control system according to claim 3, characterized in that: The pile driver hydraulic control system comprises: a first one-way relief valve (6.1) and a second one-way relief valve (6.2), wherein an oil inlet of the first one-way relief valve (6.1) and an oil inlet of the second one-way relief valve (6.2) are respectively connected to a first working oil port of the first hydraulically controlled reversing valve (6) and a second working oil port of the first hydraulically controlled reversing valve (6), and an oil outlet of the first one-way relief valve (6.1) and an oil outlet of the second one-way relief valve (6.2) are connected to an oil drain pipeline; and / or, A third one-way relief valve (10.1) and a fourth one-way relief valve (10.2), wherein an oil inlet of the third one-way relief valve (10.1) and an oil inlet of the fourth one-way relief valve (10.2) are respectively connected to a first working oil port of the second hydraulically controlled reversing valve (10) and a second working oil port of the second hydraulically controlled reversing valve (10), and an oil outlet of the third one-way relief valve (10.1) and an oil outlet of the fourth one-way relief valve (10.2) are connected to an oil discharge pipeline.

5. The pile driver hydraulic control system according to claim 3, characterized in that: The invention comprises a second control valve group (13), wherein the second control valve group (13) comprises: a third proportional valve (13.1) and a fourth proportional valve (13.2), the third proportional valve (13.1) and the fourth proportional valve (13.2) being used to control the switching of the first hydraulically controlled reversing valve (6), the oil inlets of the third proportional valve (13.1) and the fourth proportional valve (13.2) being connected to the oil outlet of the third main pump (1.3), and the oil outlets of the third proportional valve (13.1) and the fourth proportional valve (13.2) being connected to the first hydraulically controlled end and the second hydraulically controlled end of the first hydraulically controlled reversing valve (6), respectively; and / or, a fifth proportional valve (13.3) and a sixth proportional valve (13.4), the fifth proportional valve (13.3) and the sixth proportional valve (13.4) being used to control the switching of the second hydraulically controlled reversing valve (10), the oil inlets of the fifth proportional valve (13.3) and the sixth proportional valve (13.4) being connected to the oil outlet of the third main pump (1.3), and the oil outlets of the fifth proportional valve (13.3) and the sixth proportional valve (13.4) being respectively connected to the first hydraulically controlled end and the second hydraulically controlled end of the second hydraulically controlled reversing valve (10).

6. The pile driver hydraulic control system according to claim 3, characterized in that: It comprises a hydraulically controlled non-return valve (8) arranged between the second hydraulically controlled reversing valve (10) and the machine pile clamping cylinder (7), wherein the control port of the hydraulically controlled non-return valve (8) is respectively connected to the rod chamber of the machine pile clamping cylinder (7) and the first working oil port of the second hydraulically controlled reversing valve (10), the oil inlet of the hydraulically controlled non-return valve (8) is connected to the second working oil port of the second hydraulically controlled reversing valve (10), and the oil outlet of the hydraulically controlled non-return valve (8) is connected to the rodless chamber of the machine pile clamping cylinder (7).

7. The pile driver hydraulic control system according to claim 5, characterized in that: include: A controller (16) electrically connected to the first control valve group (12) and the second control valve group (13); and The control handle comprises a plurality of control buttons, wherein the plurality of control buttons are electrically connected to the controller (16), and the controller (16) is configured to receive control signals from the control buttons and control the operation of the first control valve group (12) and the second control valve group (13) according to the control signals.

8. The pile driver hydraulic control system according to claim 7, characterized in that: The invention comprises a first pressure sensor (9) for detecting the pile clamping pressure of the pile clamping cylinder (7) of the machine tool, the controller (16) being electrically connected to the first pressure sensor (9), and the controller (16) being configured to receive a pressure signal from the first pressure sensor (9) and control the operation of the first control valve group (12) and the second control valve group (13) according to the pressure signal.

9. The pile driver hydraulic control system according to claim 8, characterized in that: The controller (16) is configured to, when the pile clamping pressure detected by the first pressure sensor (9) is lower than a set safety value, connect the first proportional valve (12.1) to cut off the first hydraulically controlled valve (2.1), and connect the fifth proportional valve (13.3) to connect the first hydraulically controlled end of the second hydraulically controlled reversing valve (10).

10. The pile driver hydraulic control system according to claim 7, characterized in that: The control handle comprises a first control button (15.1), and the first control button (15.1) is slidably arranged on the control handle.

11. The pile driver hydraulic control system according to claim 10, characterized in that: The first control button (15.1) has an initial position and a first sliding area. The controller (16) is configured to, when receiving a control signal indicating that the first control button (15.1) slides from the initial position to the first sliding area, connect the first proportional valve (12.1) to disconnect the first hydraulically controlled valve (2.1), connect the sixth proportional valve (13.4) to connect the second hydraulically controlled end of the second hydraulically controlled reversing valve (10), and when receiving a control signal indicating that the first control button (15.1) slides from the first sliding area to the initial position, disconnect the first proportional valve (12.1) to connect the first hydraulically controlled valve (2.1), and disconnect the sixth proportional valve (13.4) to disconnect the second hydraulically controlled end of the second hydraulically controlled reversing valve (10).

12. The pile driver hydraulic control system according to claim 10, characterized in that: The first control button (15.1) has an initial position and a second sliding area. The controller (16) is configured to, when receiving a control signal indicating that the first control button (15.1) slides from the initial position to the second sliding area, connect the first proportional valve (12.1) to disconnect the first hydraulically controlled valve (2.1), connect the fifth proportional valve (13.3) to connect the first hydraulically controlled end of the second hydraulically controlled reversing valve (10), and when receiving a control signal indicating that the first control button (15.1) slides from the second sliding area to the initial position, disconnect the first proportional valve (12.1) to connect the first hydraulically controlled valve (2.1), and disconnect the fifth proportional valve (13.3) to disconnect the first hydraulically controlled end of the second hydraulically controlled reversing valve (10).

13. The pile driver hydraulic control system according to claim 7, characterized in that: The invention comprises a second pressure sensor (11) for detecting the on / off status of the foot valve (12.3); the second pressure sensor (11) is arranged on a pipeline between the oil outlet of the foot valve (12.3) and the hydraulic control end of the third hydraulic control valve (2.3); the controller (16) is electrically connected to the second pressure sensor (11); the controller (16) is configured to receive a pressure signal from the second pressure sensor (11) and control the operation of the first control valve group (12) and the second control valve group (13) according to the pressure signal.

14. The pile driver hydraulic control system according to claim 13, characterized in that: The controller (16) is configured to, when the second pressure sensor (11) detects a pressure signal, connect the first proportional valve (12.1) to cut off the first hydraulically controlled valve (2.1), disconnect the third proportional valve (13.1) to cut off the first hydraulically controlled end of the first hydraulically controlled reversing valve (6), and disconnect the fourth proportional valve (13.2) to cut off the second hydraulically controlled end of the first hydraulically controlled reversing valve (6).

15. The pile driver hydraulic control system according to claim 14, characterized in that: The control handle comprises a second control button (15.2), and the controller (16) is configured to, when receiving a control signal indicating that the second control button (15.2) is pressed, connect the second proportional valve (12.2) so that the second hydraulic control valve (2.2) is cut off, and, when receiving a control signal indicating that the second control button (15.2) is released, disconnect the second proportional valve (12.2) so that the second hydraulic control valve (2.2) is connected.

16. The pile driver hydraulic control system according to claim 14 or 15, characterized in that: The control handle comprises a third control button (15.3), the third control button (15.3) having an on state and a off state, and the controller (16) is configured to connect the fifth proportional valve (13.3) to connect the first hydraulic control end of the second hydraulically controlled reversing valve (10) when receiving a control signal that the third control button (15.3) is switched to the on state.

17. The pile driver hydraulic control system according to claim 7, characterized in that: The control handle comprises a fourth control button (15.4), and the fourth control button (15.4) is slidably arranged on the control handle.

18. The pile driver hydraulic control system according to claim 17, characterized in that: The fourth control button (15.4) has an initial position and a first sliding area. The controller (16) is configured to, when receiving a control signal indicating that the fourth control button (15.4) slides from the initial position to the first sliding area, connect the first proportional valve (12.1) to disconnect the first hydraulically controlled valve (2.1), connect the third proportional valve (13.1) to connect the first hydraulically controlled end of the first hydraulically controlled reversing valve (6), and when receiving a control signal indicating that the fourth control button (15.4) slides from the first sliding area to the initial position, disconnect the first proportional valve (12.1) to connect the first hydraulically controlled valve (2.1), and disconnect the third proportional valve (13.1) to disconnect the first hydraulically controlled end of the first hydraulically controlled reversing valve (6).

19. The pile driver hydraulic control system according to claim 18, characterized in that: The fourth control button (15.4) has an initial position and a second sliding area. The controller (16) is configured to, when receiving a control signal indicating that the fourth control button (15.4) slides from the initial position to the second sliding area, connect the first proportional valve (12.1) to disconnect the first hydraulically controlled valve (2.1), connect the fourth proportional valve (13.2) to connect the second hydraulically controlled end of the first hydraulically controlled reversing valve (6), and, when receiving a control signal indicating that the fourth control button (15.4) slides from the second sliding area to the initial position, disconnect the first proportional valve (12.1) to connect the first hydraulically controlled valve (2.1), and disconnect the fourth proportional valve (13.2) to disconnect the second hydraulically controlled end of the first hydraulically controlled reversing valve (6).

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