CN211901123U - Hydraulic control system of pile driver - Google Patents

Abstract

The present disclosure provides a pile driver hydraulic control system, including: the pumping device comprises a first main pump and a second main pump; a plurality of actuators configured to drive the pile driver to perform a pile driver action, the plurality of actuators including a tool vibration motor; the oil supply valve group is arranged between the pumping device and the executing elements, and has 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, the first main pump independently supplies oil to the executing elements except the machine tool vibration motor, in the second working state of the oil supply valve group, the first main pump independently supplies oil to the machine 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 machine tool vibration motor; and the first control valve group is arranged between the pumping device and the oil supply valve group and is configured to switch the working state of the oil supply valve group. The present disclosure facilitates improving the safety of pile driver operation.

Description

Hydraulic control system of pile driver

Technical Field

The disclosure relates to the field of engineering machinery, in particular to a hydraulic control system of a pile driver.

Background

In the building engineering, the pile driver is widely used in the projects of excavation and enclosure of retaining soil and retaining water of foundation pits, grooves, pipelines, basements and the like of subway stations, tunnels, bridge-building cofferdams, revetments, municipal works and civil engineering. The objects hit by the pile driver are: steel plates, i-beams, channel beams, cylinders, etc. Pile driving machines need to achieve pile clamping, vibrating and rotating functions. At present, the pile driver is mainly constructed by lengthened steel plates and cylinders, the length of each pile driver is 6-18 meters, and the requirements on the safety and the reliability of the operation of the pile driver are high.

The traditional hydraulic control system of the pile driver is modified by matching according to experience by a pile driver manufacturer in the market, and an operation control unit of the traditional hydraulic control system is a rocker switch temporarily bound on an operation handle; the pile driver vibration secondary gear reinforcement is realized by modifying a traveling pipeline of a hydraulic system, and the purpose of secondary gear reinforcement can be realized only by opening an electromagnetic valve for controlling the reversing of the traveling pipeline and then stepping on a traveling pedal and a pile driver vibration pedal simultaneously.

The hydraulic control system of the pile driver has poor operation comfort and safety; the vibration secondary reinforcement is realized by modifying a walking pipeline, so that the operation is complicated, the modification cost is high, the pipeline is messy, and the later maintenance is not facilitated; in addition, the pile driver modified in the market is poor in matching with a hydraulic system of the whole vehicle, so that the fuel consumption is high and the efficiency is low.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a pile driver hydraulic control system, including:

the pumping device comprises a first main pump and a second main pump;

a plurality of actuators configured to drive a pile driver to perform a pile driver action, the plurality of actuators including a tool vibration motor;

the oil supply valve group is arranged between the pumping device and the executing elements, the oil supply valve group 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, the first main pump independently supplies oil to the executing elements except the machine tool vibration motor, in the second working state of the oil supply valve group, the first main pump independently supplies oil to the machine 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 machine tool vibration motor; and

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

According to some embodiments of the present disclosure, the valve block includes a first pilot operated valve, a second pilot operated valve, a third pilot operated valve, and a check valve, an oil inlet of the first hydraulic control valve is connected with a first oil outlet of the third hydraulic control valve, an oil outlet of the first hydraulic control valve is connected with an oil discharge pipeline, an oil inlet of the second hydraulic control valve is connected with an oil outlet of the second main pump, an oil outlet of the second hydraulic control valve is connected with an oil discharge pipeline, an oil inlet of the third hydraulic control valve is connected with an oil outlet of the first main pump, a second oil outlet of the third hydraulic control valve is connected with an oil inlet of the machine tool vibration motor, an oil inlet and an oil outlet of the one-way valve are respectively connected with an oil outlet of the second main pump and an oil inlet of the third hydraulic control valve, and the working state of the oil supply valve group is switched by controlling the on-off of the first hydraulic control valve, the second hydraulic control valve and the third hydraulic control valve.

In accordance with some embodiments of the present disclosure,

the pumping arrangement includes a third main pump configured to supply oil to the first control valve set;

the first control valve group comprises a first proportional valve, a second proportional valve and a pedal valve, oil inlets of the first proportional valve, the second proportional valve and the pedal valve are connected with an oil outlet of the third main pump, oil outlets of the first proportional valve, the second proportional valve and the pedal valve are respectively connected with hydraulic control ends of the first hydraulic control valve, the second hydraulic control valve and the third hydraulic control valve, and the first proportional valve, the second proportional valve and the pedal valve are respectively used for controlling the on-off of the first hydraulic control valve, the second hydraulic control valve and the third hydraulic control valve.

In accordance with some embodiments of the present disclosure,

the multiple executing elements comprise machine tool rotating motors, the pile driver hydraulic control system comprises a first hydraulic control reversing valve which is arranged between an oil outlet of the first main pump and the machine tool rotating motors and used for controlling the rotating direction of the machine tool rotating motors, an oil inlet of the first hydraulic control reversing valve is connected with an oil outlet of the first main pump, an oil outlet of the first hydraulic control reversing valve is connected with an oil outlet pipeline, and a first working oil port and a second working oil port of the first hydraulic control reversing valve are respectively connected with two working ports of the machine tool rotating motors; and/or the presence of a gas in the gas,

the multiple executing elements comprise machine and tool pile clamping oil cylinders, the hydraulic control system of the pile driver comprises a second hydraulic control reversing valve which is arranged between the oil outlet of the first main pump and the machine and tool pile clamping oil cylinders and used for controlling the moving direction of movable parts of the machine and tool pile clamping oil cylinders, the oil inlet of the second hydraulic control reversing valve is connected with the oil outlet of the first main pump, the oil outlet of the second hydraulic control reversing valve is connected with an oil discharging pipeline, and a first working oil port and a second working oil port of the second hydraulic control reversing valve are respectively connected with rod cavities and rodless cavities of the machine and tool pile clamping oil cylinders.

According to some embodiments of the disclosure, the pile driver hydraulic control system comprises:

the oil inlet of the first one-way overflow valve and the oil inlet of the second one-way overflow valve are respectively connected with the first working oil port of the first hydraulic control reversing valve and the second working oil port of the first hydraulic control reversing valve, and the oil outlet of the first one-way overflow valve and the oil outlet of the second one-way overflow valve are connected with an oil discharge pipeline; and/or the presence of a gas in the gas,

the oil inlet of the third one-way overflow valve and the oil inlet of the fourth one-way overflow valve are respectively connected with the first working oil port of the second hydraulic control reversing valve and the second working oil port of the second hydraulic control reversing valve, and the oil outlet of the third one-way overflow valve and the oil outlet of the fourth one-way overflow valve are connected with an oil discharge pipeline.

According to some embodiments of the disclosure, the pile driver control system comprises a second control valve pack comprising:

the third proportional valve and the fourth proportional valve are used for controlling the first hydraulic control reversing valve to reverse, oil inlets of the third proportional valve and the fourth proportional valve are connected with an oil outlet of the third main pump, and oil outlets of the third proportional valve and the fourth proportional valve are respectively connected with a first hydraulic control end and a second hydraulic control end of the first hydraulic control reversing valve; and/or the presence of a gas in the gas,

the oil inlets of the fifth proportional valve and the sixth proportional valve are connected with 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 with the first hydraulic control end and the second hydraulic control end of the second hydraulic control reversing valve.

According to some embodiments of the present disclosure, the pile driver hydraulic control system includes a hydraulic control check valve disposed between the second hydraulic control directional control valve and the pile clamping cylinder, a control port of the hydraulic control check valve is connected to a rod cavity of the pile clamping cylinder and a first working oil port of the second hydraulic control directional control valve, respectively, an oil inlet of the hydraulic control check valve is connected to a second working oil port of the second hydraulic control directional control valve, and an oil outlet of the hydraulic control check valve is connected to a rodless cavity of the pile clamping cylinder.

According to some embodiments of the disclosure, the pile driver hydraulic control system comprises:

a controller electrically connected to the first and second control valve sets; and

the control handle comprises a plurality of control buttons, the control buttons are electrically connected with the controller, and the controller is configured to receive control signals of the control buttons and control the first control valve group and the second control valve group to work according to the control signals.

According to some embodiments of the disclosure, the pile driver hydraulic control system comprises a first pressure sensor for detecting pile clamping pressure of the pile clamping cylinder of the pile driver, the controller is electrically connected with the first pressure sensor, and the controller is configured to receive a pressure signal of the first pressure sensor and control the first control valve group and the second control valve group to work according to the pressure signal.

According to some embodiments of the disclosure, the controller is configured to, when the pile clamping pressure detected by the first pressure sensor is lower than a set safety value, switch on the first proportional valve to switch off the first hydraulic control valve, and switch on the fifth proportional valve to switch on the first hydraulic control end of the second hydraulic control directional valve.

According to some embodiments of the present disclosure, the control handle includes a first control button slidably disposed on the control handle.

According to some embodiments of the present disclosure, the first control button has an initial position and a first sliding region, the controller is configured to, upon receiving a control signal that the first control button slides from the initial position to the first sliding region, turn on the first proportional valve to turn off the first pilot-controlled valve, turn on the sixth proportional valve to turn on the second pilot-controlled end of the second pilot-controlled directional valve, upon receiving a control signal that the first control button slides from the first sliding region to the initial position, turn off the first proportional valve to turn on the first pilot-controlled valve, and turn off the sixth proportional valve to turn off the second pilot-controlled end of the second pilot-controlled directional valve.

According to some embodiments of the present disclosure, the first control button has an initial position and a second sliding region, the controller is configured to, upon receiving a control signal that the first control button slides from the initial position to the second sliding region, turn on the first proportional valve to turn off the first pilot-controlled valve, turn on the fifth proportional valve to turn on the first pilot-controlled end of the second hydraulic-controlled directional valve, upon receiving a control signal that the first control button slides from the second sliding region to the initial position, turn off the first proportional valve to turn on the first pilot-controlled valve, and turn off the fifth proportional valve to turn off the first pilot-controlled end of the second hydraulic-controlled directional valve.

According to some embodiments of the present disclosure, the pile-driver hydraulic control system includes a second pressure sensor for detecting on-off of the foot valve, the second pressure sensor is disposed on a pipeline between an oil outlet of the foot valve and a 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 of the second pressure sensor and control the first proportional valve bank and the second proportional valve bank to operate according to the pressure signal.

According to some embodiments of the disclosure, the controller is configured to, when the second pressure sensor detects a pressure signal, turn on the first proportional valve to turn off the first pilot-controlled valve, turn off the third proportional valve to turn off the first pilot-controlled end of the first pilot-controlled directional control valve, and turn off the fourth proportional valve to turn off the second pilot-controlled end of the first pilot-controlled directional control valve.

According to some embodiments of the disclosure, the control handle includes a second control button, the controller is configured to turn on the second proportional valve to turn off the second hydraulic valve when receiving a control signal that the second control button is pressed, and turn off the second proportional valve to turn on the second hydraulic valve when receiving a control signal that the second control button is released.

According to some embodiments of the present disclosure, the control handle includes a third control button having an on state and an off state, and the controller is configured to turn on the fifth proportional valve to turn on the first pilot control end of the second pilot-controlled directional valve when receiving a control signal that the third control button is switched to the on state.

According to some embodiments of the present disclosure, the control handle includes a fourth control button slidably disposed on the control handle.

According to some embodiments of the present disclosure, the fourth control button has an initial position and a first sliding region, the controller is configured to turn on the first proportional valve to turn off the first pilot-controlled valve, turn on the third proportional valve to turn on the first pilot-controlled end of the first pilot-controlled directional control valve, turn off the first proportional valve to turn on the first pilot-controlled valve, and turn off the third proportional valve to turn off the first pilot-controlled end of the first pilot-controlled directional control valve when receiving the control signal that the fourth control button slides from the first sliding region to the initial position.

According to some embodiments of the present disclosure, the fourth control button has an initial position and a second sliding region, the controller is configured to turn on the first proportional valve to turn off the first pilot-controlled valve, turn on the fourth proportional valve to turn on the second pilot-controlled end of the first pilot-controlled directional control valve, turn off the first proportional valve to turn on the first pilot-controlled valve and turn off the fourth proportional valve to turn off the second pilot-controlled end of the first pilot-controlled directional control valve when receiving the control signal that the fourth control button slides from the second sliding region to the initial position.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a hydraulic schematic diagram of a pile driver hydraulic control system according to some embodiments of the present disclosure.

Fig. 2 is a schematic view of a control handle according to some embodiments of the present disclosure.

Fig. 3 is a control schematic diagram of some embodiments of the present disclosure in a state where the pile driver automatic pressure maintaining pile clamping function is closed.

Fig. 4 is a control schematic diagram of some embodiments of the disclosure in a state where the pile driver automatic pressure maintaining pile clamping function is on.

In fig. 1 to 4, each reference numeral represents:

1-a pumping device; 1.1 — a first main pump; 1.2 — a second main pump; 1.3-a third main pump; 2-oil supply valve group; 2.1 — a first hydraulic control valve; 2.2-second hydraulic control valve; 2.3-third hydraulic control valve; 2.4-one-way valve; 3-machine tool vibration motor; 4-return oil filter; 5-implement rotation motor; 6-a first pilot operated directional control valve; 6.1-a first one-way overflow valve; 6.2-a second one-way overflow valve; 7-pile clamping oil cylinder of the machine tool; 8-hydraulic control check valve; 9 — a first pressure sensor; 10-a second hydraulically controlled directional control valve; 10.1-third one-way relief valve; 10.2-fourth one-way relief valve; 11 — a second pressure sensor; 12-a first control valve group; 12.1 — a first proportional valve; 12.2 — a second proportional valve; 12.3-foot valve; 13-a 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-a hydraulic oil tank; 15A-left control handle; 15B-right control handle; 15.1 — first control button; 15.1(a) -a first sliding region of a first control button; 15.1(b) -the second sliding region of the first control button; 15.2 — second control button; 15.3 — third control button; 15.4-fourth control button; 15.4(a) -a first sliding region of a fourth control button; 15.4(b) -a second slide area of the fourth control button; and 16, a controller.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.

As shown in fig. 1, some embodiments of the present disclosure provide a pile driver hydraulic control system including a pumping arrangement 1, a plurality of actuators, an oil feed valve block 2, and a first control valve block 12.

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

A plurality of actuators are in driving connection with the pile driver tool and are configured to drive the pile driver to perform a pile driver tool action, the plurality of actuators comprising a tool vibration motor 3.

The oil supply valve group 2 is arranged between the pumping device 1 and the executing elements, the oil supply valve group 2 has a first working state, a second working state and a third working state, the first working state of the oil supply valve group 2 is that the first main pump 1.1 supplies oil to the executing elements except the machine tool vibration motor 3 independently, the second working state of the oil supply valve group 2 is that the first main pump 1.1 supplies oil to the machine tool vibration motor 3 independently, and the third working state of the oil supply valve group 2 is that the first main pump 1.1 and the second main pump 1.2 supply oil to the machine tool vibration motor 3 simultaneously. The oil supply valve group 2 has different oil supply modes under different working states, and the vibration of different gears can be realized by the machine tool vibration motor 3 according to different oil supply flows of the pumping device 1.

A first control valve block 12 is provided between the pumping device 1 and the oil supply valve block 2, the first control valve block 12 being configured to switch an operating state of the oil supply valve block 2.

In some embodiments, the oil supply valve group 2 includes a first hydraulic control valve 2.1, a second hydraulic control valve 2.2, a third hydraulic control valve 2.3 and a check valve 2.4, an oil inlet of the first hydraulic control valve 2.1 is connected with a first oil outlet of the third hydraulic control valve 2.3, an oil outlet of the first hydraulic control valve 2.1 is connected with an oil discharge pipeline, an oil inlet of the second hydraulic control valve 2.2 is connected with an oil outlet of the second main pump 1.2, an oil outlet of the second hydraulic control valve 2.2 is connected with the oil discharge pipeline, an oil inlet of the third hydraulic control valve 2.3 is connected with an oil outlet of the first main pump 1.1, a second oil outlet of the third hydraulic control valve 2.3 is connected with an oil inlet of the vibration motor 3, an oil inlet and an oil outlet of the check valve 2.4 are respectively connected with an oil outlet of the second main pump 1.2 and an oil inlet of the third hydraulic control valve 2., the working state of the oil supply valve group 2 is switched by controlling the on-off of the first hydraulic control valve 2.1, the second hydraulic control valve 2.2 and the third hydraulic control valve 2.3.

In some embodiments, the pumping device 1 comprises a third main pump 1.3, the third main pump 1.3 being connected in parallel with the first main pump 1.1 and the second main pump 1.2, the third main pump 1.3 being 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, oil inlets of the first proportional valve 12.1, the second proportional valve 12.2 and the foot valve 12.3 are connected with an oil outlet of a third main pump 1.3, oil outlets of the first proportional valve 12.1, the second proportional valve 12.2 and the foot valve 12.3 are respectively connected with oil outlets of a first hydraulic control valve 2.1, a second hydraulic control valve 2.2 and a 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 for controlling on-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 and second proportional valves 12.1, 12.2 may be proportional pressure reducing valves.

According to the connection relation, the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 are cut off and the oil inlet and the second oil outlet of the third hydraulic control valve 2.3 are communicated, the oil supply valve group 2 is in a second working state, the first main pump 1.1 supplies oil to the machine tool vibration motor 3, and the pile driver can realize first-gear vibration; the second hydraulic control valve 2.2 is cut off, the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 are communicated, the oil inlet and the second oil outlet of the third hydraulic control valve 2.3 are cut off, the oil supply valve group 2 is in a third working state, the first main pump 1.1 and the second main pump 1.2 simultaneously supply oil to the machine tool vibration motor 3, and the pile driver can realize second-gear vibration.

In some embodiments, the multiple actuating elements include an implement turning motor 5 for performing pile driving implement turning work, the pile driving implement hydraulic control system includes a first hydraulic control directional valve 6 disposed between an oil outlet of the first main pump 1.1 and the implement turning motor 5 for controlling a turning direction of the implement turning motor 5, an oil inlet of the first hydraulic control directional valve 6 is connected to an oil outlet of the first main pump 1.1, an oil outlet of the first hydraulic control directional valve 6 is connected to an oil outlet pipeline, and a first working oil port and a second working oil port of the first hydraulic control directional valve 6 are respectively connected to two working ports of the implement turning motor 5.

According to the connection relation, the first hydraulic control valve 2.1 is cut off, the oil supply valve group 2 is in a first working state, the first main pump 1.1 supplies oil to one of two working ports of the pile driving machine 5, and the pile driving machine can realize bidirectional rotation.

In some embodiments, the plurality of actuators includes an implement clamp cylinder 7 for performing pile driver/unclamp operations. The hydraulic control system of the pile driver comprises a second hydraulic control reversing valve 10 which is arranged between an oil outlet of the first main pump 1.1 and the pile clamping oil cylinder 7 of the machine tool and used for controlling the moving direction of a movable part of the pile clamping oil cylinder 7 of the machine tool. An oil inlet of a second hydraulic control reversing valve 10 is connected with an oil outlet of the first main pump 1.1, an oil discharge port of the second hydraulic control reversing valve 10 is connected with an oil discharge pipeline, and a first working oil port and a second working oil port of the second hydraulic control reversing valve 10 are respectively connected with a rod cavity and a rodless cavity of the pile clamping oil cylinder 7 of the machine tool.

According to the connection relation, the first hydraulic control valve 2.1 is cut off, the oil supply valve group 2 is in a first working state, the first main pump 1.1 supplies oil to a rodless cavity or a rod cavity of the pile clamping oil cylinder 7 of the pile driver, and the pile driver can clamp or loosen a pile.

In the first pilot valve group 12, as shown in fig. 1, the first proportional valve 12.1 controls the first pilot valve 2.1 to switch off, thereby controlling the pile driver to swing or clamp/release the pile.

As shown in fig. 1, the pedal valve 12.3 includes a pedal, the pedal valve 12.3 is turned on when the pedal is pressed, so as to cut off the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 and turn on the oil inlet and the second oil outlet of the third hydraulic control valve 2.3, the pedal valve 12.3 is released to be turned off, so as to turn on the oil inlet and the first oil outlet of the third hydraulic control valve 2.3 and turn 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 oil inlet and the second oil outlet of the third hydraulic control valve 2.3 to be communicated, and can control the first-gear vibration of the machine. In the first control valve set 12, the second proportional valve 12.2 can control the second hydraulic control valve 2.2 to cut off, and can control the second gear vibration of the machine together with the foot valve 12.3.

Controllers and control routines may be configured for first and second control valve groups 12 and 13, respectively, with control strategies of: when the pile driver is controlled to rotate, clamp/loosen piles or vibrate, the oil supply valve group 2 is controlled to switch the working state, so that different actions of the pile driver are realized. The adjustment of different action flows can be realized by controlling different current set values in the program. The pile driver can comprise a plurality of pile driving modes, such as a steel plate pile mode and a pile casing mode, and under different pile driving modes, the control program sets parameters according to control habits and power matching under different construction working conditions. Therefore, the matching of the flow of the hydraulic system can be realized by adjusting the control program under the conditions that the pile driver operates under different working conditions and pile drivers of different models are realized, the operation is simple and convenient, and the problems of high oil consumption and low efficiency of the hydraulic control system of the pile driver refitted in the prior art are solved.

In some embodiments, the hydraulic control system of the pile driver comprises a first one-way overflow valve 6.1 and a second one-way overflow valve 6.2, an oil inlet of the first one-way overflow valve 6.1 and an oil inlet of the second one-way overflow valve 6.2 are respectively connected with a first working oil port of the first hydraulic control reversing valve 6 and a second working oil port of the first hydraulic control reversing valve 6, and an oil outlet of the first one-way overflow valve 6.1 and an oil outlet of the second one-way overflow valve 6.2 are connected with an oil discharge pipeline.

In some embodiments, the hydraulic control system of the pile driver comprises a third one-way overflow valve 10.1 and a fourth one-way overflow valve 10.2, an oil inlet of the third one-way overflow valve 10.1 and an oil inlet of the fourth one-way overflow valve 10.2 are respectively connected with a first working oil port of the second hydraulic directional control valve 10 and a second working oil port of the second hydraulic directional control valve 10, and an oil outlet of the third one-way overflow valve 10.1 and an oil outlet of the fourth one-way overflow valve 10.2 are connected with an oil discharge pipeline.

In some embodiments, the pile driver control system includes a second control valve pack 13.

In some embodiments, the second control valve group 13 includes 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 are used for controlling the first pilot-controlled reversing valve 6 to reverse, oil inlets of the third proportional valve 13.1 and the fourth proportional valve 13.2 are connected with an oil outlet of the third main pump 1.3, and oil outlets of the third proportional valve 13.1 and the fourth proportional valve 13.2 are respectively connected with the first pilot-controlled end and the second pilot-controlled end of the first pilot-controlled reversing valve 6. The third and fourth proportional valves 13.1, 13.2 may be proportional pressure reducing valves.

In some embodiments, the second control valve group 13 includes 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 are used for controlling the second hydraulic control directional valve 10 to change direction, oil inlets of the fifth proportional valve 13.3 and the sixth proportional valve 13.4 are connected with an oil outlet of the third main pump 1.3, and oil outlets of the fifth proportional valve 13.3 and the sixth proportional valve 13.4 are respectively connected with the first hydraulic control end and the second hydraulic control end of the second hydraulic control directional valve 10. The fifth and sixth proportional valves 13.3, 13.4 may be proportional pressure reducing valves.

In some embodiments, the hydraulic control system of the pile driver comprises a hydraulic control one-way valve 8 disposed between the second hydraulic control directional valve 10 and the pile clamping cylinder 7, a control port of the hydraulic control one-way valve 8 is connected to a rod cavity of the pile clamping cylinder 7 and a first working oil port of the second hydraulic control directional valve 10, respectively, an oil inlet of the hydraulic control one-way valve 8 is connected to a second working oil port of the second hydraulic control directional valve 10, and an oil outlet of the hydraulic control one-way valve 8 is connected to a rodless cavity of the pile clamping cylinder 7. The hydraulic control one-way valve 8 can keep the pressure of a rodless cavity of the pile clamping oil cylinder 7 of the machine tool, and plays a role in preventing pile falling.

To better effect control of the pile driver, the pile driver hydraulic control system may also include a controller 16 and a control handle.

Controller 16 is electrically connected to first and second control valve sets 12 and 13.

The control handle includes a plurality of control buttons 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 and second control valve sets 12 and 13 according to the control signals.

As shown in fig. 1, to realize the left rotation, right rotation and stop of the implement turning motor 5, the pressures of the two hydraulic control ends of the first hydraulic control directional valve 6 can be changed by controlling the third proportional valve 13.1 and the fourth proportional valve 13.2, so as to control the pressures of the two working ports of the implement turning motor 5 to control whether the implement turning motor 5 rotates or rotates in the direction. The first pilot-operated directional control valve 6 has a first working position (left position in fig. 1), a second working position (right position in fig. 1), and a third working position (middle position in fig. 1), and performs right-handed rotation, left-handed rotation, and stop operations corresponding to the implement turning motor 5, respectively. Therefore, the third proportional valve 13.1 is switched on, the first hydraulic control end of the first hydraulic control reversing valve 6 is switched on, the first hydraulic control reversing valve 6 is switched to the first working position, and the machine tool rotary motor 5 rotates rightwards; the fourth proportional valve 13.2 is communicated, the second hydraulic control end of the first hydraulic control reversing valve 6 is communicated, the first hydraulic control reversing valve 6 is switched to the second working position, and the machine tool rotary motor 5 rotates left; the third proportional valve 13.1 and the fourth proportional valve 13.2 are not communicated, 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 a third working position, and the machine tool 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-shaped neutral position function.

As shown in fig. 1, to achieve pile clamping, pile loosening and stopping of the pile clamping cylinder 7 of the implement, the pressures of the two hydraulic control ends of the second hydraulic control directional valve 10 can be changed by controlling the fifth proportional valve 13.3 and the sixth proportional valve 13.4, so as to control the pressures of the two working ports of the pile clamping cylinder 7 of the implement, and to control whether the piston rod of the pile clamping cylinder 7 of the implement moves or stretches out and draws back. The second hydraulic control directional valve 10 has a first working position (left position in fig. 1), a second working position (right position in fig. 1) and a third working position (middle position in fig. 1), and respectively performs operations of extending a piston rod, retracting the piston rod and immobilizing the piston rod corresponding to the pile clamping cylinder 7 of the machine tool. Therefore, the fifth proportional valve 13.3 is switched on, the first hydraulic control end of the second hydraulic control reversing valve 10 is switched on, the second hydraulic control reversing valve 10 is switched to the first working position, the rodless cavity of the pile clamping oil cylinder 7 of the pile driving machine is fed with oil and the rod cavity is fed with oil, the piston rod extends out, and the pile driving machine clamps the pile; the sixth proportional valve 13.4 is switched on, the second hydraulic control end of the second hydraulic control reversing valve 10 is switched on, the second hydraulic control reversing valve 10 is switched to a second working position, the rod cavity of the pile clamping oil cylinder 7 of the pile driver is fed with oil and the rod cavity is not fed with oil, the piston rod is retracted, and the pile driver looses the pile; the fifth proportional valve 13.3 and the sixth proportional valve 13.4 are not communicated, 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 a third working position, and the pile clamping oil cylinder 7 of the machine tool stops. The second hydraulic control directional control valve 10 can adopt a three-position four-way hydraulic control directional control valve with an O-shaped neutral position function.

Fig. 3 and 4 show the control relationship of the pile driver hydraulic control system provided by the embodiment of the disclosure. In fig. 3 and 4, a1 to a7 represent control signals input to the controller 16, b1 to b7 represent control signals output by the controller 16 to the respective solenoid valves in the pile driver hydraulic control system, and c1 to c7 represent control signals output by the respective solenoid valves in the pile driver hydraulic control system to the respective pilot control valves in the pile driver hydraulic control system.

The hydraulic control system of the pile driver provided by the embodiment of the disclosure can enable the pile driver to realize the actions of first-gear vibration, second-gear vibration, left-handed rotation, right-handed rotation, pile clamping, pile loosening and the like, and can correspondingly configure the control buttons on the controller 16 and the control handle according to actual requirements.

In addition, a detection device can be arranged in the hydraulic control system of the pile driver, and when the pressure, the flow rate and the like in the hydraulic control system of the pile driver are detected to be out of the set range, a control signal is sent to the controller, so that the safety and the reliability of the operation of the pile driver are further improved.

In some embodiments, the pile driver hydraulic control system comprises a first pressure sensor 9 for detecting pile clamping pressure of the pile clamping cylinder 7, the first pressure sensor 9 is disposed on a rodless pipe of the pile clamping cylinder 7, the controller 16 is electrically connected with the first pressure sensor 9, and the controller 16 is configured to receive a pressure signal of the first pressure sensor 9 and control the first control valve bank 12 and the second control valve bank 13 to work according to the pressure signal.

The process of pile driver pile pulling needs great lifting force, and if pile clamping pressure is not enough during pile pulling, the pile driver probably takes place to take off a pile accident. In order to reduce the risk of pile-tripping, in the above-described embodiment, the controller 16 may be configured to switch on the first proportional valve 12.1 to switch off the first pilot-controlled valve 2.1 and switch on the fifth proportional valve 13.3 to switch on the first pilot-controlled end of the second pilot-controlled directional valve 10 when the pile clamping pressure detected by the first pressure sensor 9 is lower than a set safety value, respectively.

The concrete process of detecting pile clamping pressure by using the first pressure sensor 9 to reduce the risk of pile stripping 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 a set safety value, the controller 16 outputs an electric signal b6 to respectively switch on the first proportional valve 12.1 and the fifth proportional valve 13.3; the first proportional valve 12.1 and the fifth proportional valve 13.3 output hydraulic control signals c6, the first hydraulic control valve 2.1 is switched off, the first hydraulic control end of the second hydraulic control reversing valve 10 is switched on to enable the rodless cavity of the pile clamping oil cylinder 7 of the machine tool to be filled with oil, and pile clamping pressure is increased until a safety value is reached.

The first pressure sensor 9 can be used in combination with the hydraulic control one-way valve 8, and plays a role in double protection for preventing pile removal. On the basis, the controller 16 can be further configured to output an alarm signal when the pile clamping pressure detected by the first pressure sensor 9 is lower than a set safety value, so as to play a role of pile-off pre-alarm.

As shown in fig. 2, in some embodiments, the control handle includes a first control button 15.1, the first control button 15.1 being slidably disposed on the control handle. By sliding the first control button 15.1 to different operating positions, the controller 16 can output different electrical signals to bring the pile driver hydraulic control system to the flow values required to control the pile gripping and loosening actions of the pile driver.

In some embodiments, the first control button 15.1 has an initial position and a first sliding area 15.1(a), and the first control button 15.1 is slid from the initial position to the first sliding area 15.1(a), and when the first control button 15.1 is released, the first control button 15.1 can return to the initial position. The controller 16 is configured such that upon receiving the control signal a1 when 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 to switch on 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 switch off the first pilot valve 2.1, the sixth proportional valve 13.4 outputs a control signal c1 to switch on the second pilot port of the second pilot operated directional valve 10, and the implement pile clamping cylinder 7 performs a pile loosening action. When a control signal that the first control button 15.1 slides from the first sliding area 15.1(a) to the initial position is received, the first proportional valve 12.1 is switched off to switch on the first hydraulic control valve 2.1, the sixth proportional valve 13.4 is switched off to switch off the second hydraulic control end of the second hydraulic control reversing valve 10, and the implement pile clamping cylinder 7 stops operating.

The effect of the above configuration is: sliding the first control button 15.1 from the initial position to the first sliding area 15.1(a), the pile driver performs a 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 releasing action.

In some embodiments, the first control button 15.1 has an initial position and a second sliding region 15.1(b), and the first control button 15.1 is slid from the initial position to the second sliding region 15.1(b), and when the first control button 15.1 is released, the first control button 15.1 can return to the initial position. When the controller 16 receives the control signal a3 when 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 switch on 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 switch off the first pilot-controlled valve 2.1, the fifth proportional valve 13.3 outputs a control signal c3 to switch on the first pilot-controlled end of the second pilot-controlled directional valve 10, and the implement pile clamping cylinder 7 performs pile clamping. When receiving a 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 turned off to turn on the first hydraulic control valve 2.1, the fifth proportional valve 13.3 is turned off to turn off the first hydraulic control end of the second hydraulic control directional valve 10, and the implement pile clamping cylinder 7 stops operating.

The effect of the above configuration is: sliding the first control button 15.1 from the initial position to the second sliding area 15.1(b), the pile driver performs a pile gripping 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 gripping action.

In some embodiments, the pile driver hydraulic control system comprises a second pressure sensor 11 for detecting the on-off condition of the foot valve 12.3, the second pressure sensor 11 being arranged on the line 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 switched on, the pilot port of the third pilot valve 2.3 is switched 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 a pressure signal from the second pressure sensor 11 and control the first and second valve control sets 12 and 13 to operate according to the pressure signal.

In some embodiments, the controller 16 is configured to switch on the first proportional valve 12.1 to switch off the first pilot-controlled valve 2.1, switch off the third proportional valve 13.1 to switch off the first pilot-controlled end of the first pilot-controlled directional valve 6, and switch off the fourth proportional valve 13.2 to switch off the second pilot-controlled end of the first pilot-controlled directional valve 6 when the second pressure sensor 11 detects the pressure signal.

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 switched on, the pilot port of the third pilot control valve 2.3 is switched on, and the second pressure sensor 11 transmits the detected pressure signal a7 to the controller 16; the controller 16 outputs an electric signal b7, switches on the first proportional valve 12.1 and switches off 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 machine tool vibration motor 3 executes a first gear vibration action; the third proportional valve 13.1 outputs a control signal c7 to cut off the first pilot port of the first pilot-operated directional control valve 6, and the fourth proportional valve 13.2 outputs a control signal c7 to cut off the second pilot port of the first pilot-operated directional control valve 6, so that the implement turning motor 5 stops operating. The foot valve 12.3 is disconnected, the third hydraulic control valve 2.3 cuts off an oil outlet of the first main pump 1.1 and an oil inlet of the machine tool vibration motor 3, the second pressure sensor 11 cannot detect a pressure signal, and the machine tool vibration motor 3 stops acting.

The effect of the above configuration is: the foot valve 12.3 is stepped, the pile driver implements the first-gear vibration action, cut off the oil circuit which controls the implement to rotate and act at the same time; the foot valve 12.3 is released, and the pile driver stops the first vibration action.

In some embodiments, the control handle comprises a second control button 15.2, and when the controller 16 is configured to receive a control signal a2 that the second control button 15.2 is pressed on the premise that the foot valve 12.3 is turned on, the controller 16 outputs a control signal b2 to turn on the second proportional valve 12.2, the second proportional valve 12.2 outputs a control signal c2 to turn off the second hydraulic valve 2.2, the first main pump 1.1 and the second main pump 1.2 simultaneously supply oil to the implement vibration motor 3, and the implement vibration motor 3 performs a second gear vibration motion. When a control signal that the second control button 15.2 is released is received, the second proportional valve 12.2 is switched off to switch on the second hydraulic control valve 2.2, and the machine tool vibration motor 3 stops the second gear vibration action.

The effect of the above configuration is: on the premise that the foot valve 12.3 is connected, the second control button 15.2 is pressed, the pile driver executes the second-gear vibration action, and simultaneously an oil way for controlling the rotation action of the pile driver is cut off; the second control button 15.2 is released and the pile driver ceases the second range of vibratory motion and the first range of vibratory motion of the pile driver remains.

According to the above configuration, the implement turning motor 5 cannot be turned during the vibration of the pile driver, which is advantageous for better protection of the implement turning motor 5.

In some embodiments, in order to realize the function of automatic pressure-maintaining pile clamping of the pile driver during the pile driving process, so as to reduce the risk of pile falling and improve the operation safety, the control handle comprises a third control button 15.3, the third control button 15.3 has an open state and a closed state, the open state and the closed state respectively correspond to the opening and closing of the function of automatic pressure-maintaining pile clamping of the pile driver, and the switching between the two working states is realized by pressing the third control button 15.3. When the controller 16 receives a control signal that the third control button 15.3 is switched to the on state, the controller 16 outputs an electric signal b7 to switch on the fifth proportional valve 13.3, the fifth proportional valve 13.3 outputs a control signal c7 to switch on the first hydraulic control end of the second hydraulic control directional valve 10, and the implement pile clamping cylinder 7 performs a pile clamping action.

The effect of the above configuration is: the foot valve 12.3 is stepped on and the third control button 15.3 is switched to the open state, the pile driver executes the first-gear vibration action, and simultaneously executes the pile clamping action and cuts off an oil path for controlling the rotation action of the pile driver; on the premise that the foot valve 12.3 is switched on, the second control button 15.2 is pressed and the third control button 15.3 is switched to the opening state, so that the pile driver executes the second-gear vibration action, simultaneously executes the pile clamping action and cuts off an oil path for controlling the rotation action of the pile driver.

Fig. 3 and 4 show the control principle of the hydraulic control system of the pile driver in the two states of closing and opening the automatic pressure maintaining pile clamping function of the pile driver. According to different piling modes of the pile driver, the automatic pressure maintaining and pile clamping functions of the pile driver can be correspondingly selected to be started and closed. For example, in the steel sheet pile mode, the automatic pressure maintaining and pile clamping function of the pile driver can be started to improve the efficiency of pile driving operation; under the pile protection mode, the automatic pressure maintaining and pile clamping function of the pile driver can be closed, so that the safety of pile driving operation is improved. As shown in fig. 2, in some embodiments, the control handle includes a fourth control button 15.4, the fourth control button 15.4 being slidably disposed on the control handle. By sliding the fourth control button 15.4 to a different operating position, the controller 16 can output a different electrical signal to bring the pile driver hydraulic control system to the flow value required to control the slewing action of the pile driver.

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), and when the fourth control button 15.4 is released, the fourth control button 15.4 can return to the initial position. The controller 16 is configured such that upon receiving the pilot signal a4 when the fourth pilot button 15.4 slides from the initial position to the first sliding region 15.4(a), the controller 16 outputs a pilot signal b4 to turn on the first proportional valve 12.1 and the third proportional valve 13.1, the first proportional valve 12.1 outputs a pilot signal c4 to turn off the first pilot-controlled valve 2.1, the third proportional valve 13.1 outputs a pilot signal c4 to turn on the first pilot-controlled end of the first pilot-controlled directional valve 6, and the implement turning motor 5 performs a right-hand operation. 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 turned off to turn on the first pilot control valve 2.1, the third proportional valve 13.1 is turned off to turn off the first pilot control end of the first pilot control directional control valve 6, and the implement turning motor 5 stops operating.

The effect of the above configuration is: sliding the fourth control button 15.4 from the initial position to the first sliding area 15.4(a), the pile driver performs a right-handed movement; the fourth control button 15.4 is released and 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-handed movement.

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), and when the fourth control button 15.4 is released, the fourth control button 15.4 can return to the initial position. The controller 16 is configured such that, upon receiving the control signal a5 when the fourth control button 15.4 slides from the initial position to the second sliding region 15.4(b), the controller 16 outputs a control signal b5 to turn on 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 turn off the first pilot valve 2.1, the fourth proportional valve 13.2 outputs a control signal c5 to turn on the second pilot port of the first pilot-operated directional valve 6, and the implement swing motor 5 performs a left-hand operation. 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 turned off to turn on the first pilot control valve 2.1, the fourth proportional valve 13.2 is turned off to turn off the second pilot control end of the first pilot control directional control valve 6, and the implement turning motor 5 stops operating.

The effect of the above configuration is: sliding the fourth control button 15.4 from the initial position to the second sliding area 15.4(b), the pile driver performs a left-handed movement; 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-handed operation. First control button 15.1 and fourth control button 15.4 can adopt automatic re-setting sliding button, have when making pile driver equipment carry out to press from both sides the stake, loosen the stake and the gyration action and slide promptly, loose promptly and stop promptly's effect promptly, compare in using the rocker switch to control the action of pile driver equipment, can reduce the incident risk that the operator maloperation brought. The value of the electrical signal output by the controller 16 is proportional to the travel of the first control button 15.1 and the fourth control button 15.4 sliding with respect to the initial position.

The various functions of the pile driver hydraulic control system may be integrated into the same set of control handles. The control handle shown in fig. 2 comprises a left control handle 15A and a right control handle 15B, and the fourth control button 15.4 is 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 are arranged on the right control handle 15B.

In some embodiments, the Controller described above may 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 device, discrete Gate or transistor Logic, discrete hardware components, or any suitable combination thereof for performing the functions described in this disclosure.

According to the description of the various embodiments, the embodiments of the present disclosure have at least one of the following beneficial effects:

compared with the conventional pile driver hydraulic control system which uses the walking foot pedal and the pile driver vibration foot pedal to control the pile driver to vibrate and uses the rocker switch as the operation control unit of the pile driver, the integrated multifunctional handle and the corresponding controller are configured in the pile driver hydraulic control system, so that the safety, the comfort and the reliability of the operations of vibrating, rotating, clamping and loosening the pile driver are improved.

Because the flow of pile driver pile loosening/clamping and rotation action requirements is small, the controller can slide corresponding control buttons by different strokes to output different electric signals to the first control valve group and the second control valve group, finely control the flow required by actions of rotation, pile clamping, pile loosening and the like of the pile driver, and improve the efficiency and accuracy of the pile driver pile.

Compared with a hydraulic control system of the pile driver formed by refitting, the pipeline arrangement is simple, and the maintenance is convenient.

Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the embodiments of the disclosure or equivalent replacements of parts of the technical features may be made, which are all covered by the technical solution claimed by the disclosure.

Claims (20)

1. A pile driver hydraulic control system, comprising:

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 a pile driver to perform a pile driver action, the plurality of actuators including a tool vibration motor (3);

the oil supply valve group (2) is arranged between the pumping device (1) and the executing elements, 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) independently supplies oil to the executing elements except the machine tool vibration motor (3), in the second working state of the oil supply valve group (2), the first main pump (1.1) independently supplies oil to the machine 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 machine tool vibration motor (3); and

a first control valve group (12) arranged between the pumping device (1) and the oil supply valve group (2), the first control valve group (12) being configured to switch the operating state of the oil supply valve group (2).

2. Pile-driver hydraulic control system according to claim 1, characterized in that the oil supply valve group (2) comprises a first hydraulic control valve (2.1), a second hydraulic control valve (2.2), a third hydraulic control valve (2.3) and a one-way valve (2.4), the oil inlet of the first hydraulic control valve (2.1) is connected with the first oil outlet of the third hydraulic control valve (2.3), the oil outlet of the first hydraulic control valve (2.1) is connected with an oil discharge line, the oil inlet of the second hydraulic control valve (2.2) is connected with the oil outlet of the second main pump (1.2), the oil outlet of the second hydraulic control valve (2.2) is connected with an oil discharge line, the oil inlet of the third hydraulic control valve (2.3) is connected with the oil outlet of the first main pump (1.1), the second oil outlet of the third hydraulic control valve (2.3) is connected with the oil inlet of the vibration machine tool motor (3), and the oil outlet and the oil inlet of the one-way valve (2.4) are respectively connected with the oil inlet of the second main pump (1.2) and the third hydraulic control valve (2.4) 2.3), wherein the working state of the oil supply valve group (2) is switched by controlling the on-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. Pile driver hydraulic control system according to claim 2,

-the pumping device (1) comprises a third main pump (1.3), the third main pump (1.3) being configured to feed 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), oil inlets of the first proportional valve (12.1), the second proportional valve (12.2) and the foot valve (12.3) are connected with an oil outlet of the third main pump (1.3), oil outlets of the first proportional valve (12.1), the second proportional valve (12.2) and the foot valve (12.3) are respectively connected with 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 for controlling on-off of the first hydraulic control valve (2.1), the second hydraulic control valve (2.2) and the third hydraulic control valve (2.3).

4. Pile driver hydraulic control system according to claim 3,

the multiple executing elements comprise a machine tool rotating motor (5), the pile driver hydraulic control system comprises a first hydraulic control reversing valve (6) which is arranged between an oil outlet of the first main pump (1.1) and the machine tool rotating motor (5) and used for controlling the rotating direction of the machine tool rotating motor (5), an oil inlet of the first hydraulic control reversing valve (6) is connected with an oil outlet of the first main pump (1.1), an oil outlet of the first hydraulic control reversing valve (6) is connected with an oil discharging pipeline, and a first working oil port and a second working oil port of the first hydraulic control reversing valve (6) are respectively connected with two working ports of the machine tool rotating motor (5); and/or the presence of a gas in the gas,

the multiple executing elements comprise machine and tool pile clamping oil cylinders (7), the hydraulic control system of the pile driver comprises a second hydraulic control reversing valve (10) which is arranged between an oil outlet of the first main pump (1.1) and the machine and tool pile clamping oil cylinders (7) and used for controlling the moving direction of a movable part of the machine and tool pile clamping oil cylinders (7), an oil inlet of the second hydraulic control reversing valve (10) is connected with an oil outlet of the first main pump (1.1), an oil outlet of the second hydraulic control reversing valve (10) is connected with an oil discharging pipeline, and a first working oil port and a second working oil port of the second hydraulic control reversing valve (10) are respectively connected with a rod cavity and a rodless cavity of the machine and tool pile clamping oil cylinders (7).

5. Pile driver hydraulic control system according to claim 4, characterized in that it comprises:

an oil inlet of the first one-way overflow valve (6.1) and an oil inlet of the second one-way overflow valve (6.2) are respectively connected with a first working oil port of the first hydraulic control reversing valve (6) and a second working oil port of the first hydraulic control reversing valve (6), and an oil outlet of the first one-way overflow valve (6.1) and an oil outlet of the second one-way overflow valve (6.2) are connected with an oil discharge pipeline; and/or the presence of a gas in the gas,

the oil inlet of the third one-way overflow valve (10.1) and the oil inlet of the fourth one-way overflow valve (10.2) are respectively connected with the first working oil port of the second hydraulic control reversing valve (10) and the second working oil port of the second hydraulic control reversing valve (10), and the oil outlet of the third one-way overflow valve (10.1) and the oil outlet of the fourth one-way overflow valve (10.2) are connected with an oil discharge pipeline.

6. Pile driver hydraulic control system according to claim 4, comprising a second control valve pack (13), the second control valve pack (13) comprising:

the third proportional valve (13.1) and the fourth proportional valve (13.2) are used for controlling the first hydraulic control reversing valve (6) to reverse, oil inlets of the third proportional valve (13.1) and the fourth proportional valve (13.2) are connected with an oil outlet of the third main pump (1.3), and oil outlets of the third proportional valve (13.1) and the fourth proportional valve (13.2) are respectively connected with a first hydraulic control end and a second hydraulic control end of the first hydraulic control reversing valve (6); and/or the presence of a gas in the gas,

the hydraulic control system comprises a fifth proportional valve (13.3) and a sixth proportional valve (13.4), wherein the fifth proportional valve (13.3) and the sixth proportional valve (13.4) are used for controlling the second hydraulic control reversing valve (10) to reverse, oil inlets of the fifth proportional valve (13.3) and the sixth proportional valve (13.4) are connected with an oil outlet of the third main pump (1.3), and oil outlets of the fifth proportional valve (13.3) and the sixth proportional valve (13.4) are respectively connected with a first hydraulic control end and a second hydraulic control end of the second hydraulic control reversing valve (10).

7. The pile driver hydraulic control system according to claim 4, comprising a hydraulic control one-way valve (8) arranged between the second hydraulic control reversing valve (10) and the pile clamping cylinder (7), wherein a control port of the hydraulic control one-way valve (8) is respectively connected with a rod cavity of the pile clamping cylinder (7) and a first working oil port of the second hydraulic control reversing valve (10), an oil inlet of the hydraulic control one-way valve (8) is connected with a second working oil port of the second hydraulic control reversing valve (10), and an oil outlet of the hydraulic control one-way valve (8) is connected with a rodless cavity of the pile clamping cylinder (7).

8. Pile driver hydraulic control system according to claim 6, comprising:

a controller (16) electrically connected to the first and second control valve sets (12, 13); and

a control handle including a plurality of control buttons, the plurality of control buttons being electrically connected to the controller (16), the controller (16) being configured to receive control signals from the control buttons and to control the first and second control valve sets (12, 13) to operate according to the control signals.

9. Pile driver hydraulic control system according to claim 8, comprising a first pressure sensor (9) for detecting pile clamping pressure of the pile clamping cylinder (7), wherein the controller (16) is electrically connected to the first pressure sensor (9), and wherein the controller (16) is configured to receive a pressure signal of the first pressure sensor (9) and to control the first and second control valve banks (12, 13) to operate according to the pressure signal.

10. Pile driver hydraulic control system according to claim 9, wherein the controller (16) is configured to switch on the first proportional valve (12.1) to switch off the first pilot controlled valve (2.1) and to switch on the fifth proportional valve (13.3) to switch on the first pilot controlled end of the second hydraulically controlled directional valve (10) when the pile clamping pressure detected by the first pressure sensor (9) is below a set safety value.

11. Pile driver hydraulic control system according to claim 8, wherein the control handle comprises a first control button (15.1), the first control button (15.1) being slidably arranged on the control handle.

12. Pile driver hydraulic control system according to claim 11, characterised in that the first control button (15.1) has an initial position and a first sliding area, the controller (16) is configured to receive a control signal of the first control button (15.1) sliding from the initial position to the first sliding region, switching on the first proportional valve (12.1) to switch off the first pilot-controlled valve (2.1), switching on the sixth proportional valve (13.4) to switch on the second pilot-controlled end of the second pilot-controlled directional control valve (10), receiving a control signal that the first control button (15.1) slides from the first sliding area to the initial position, the first proportional valve (12.1) is disconnected to enable the first hydraulic control valve (2.1) to be switched on, and the sixth proportional valve (13.4) is disconnected to enable the second hydraulic control end of the second hydraulic control reversing valve (10) to be switched off.

13. Pile driver hydraulic control system according to claim 11, wherein the first control button (15.1) has an initial position and a second sliding area, the controller (16) is configured to receive a control signal of the first control button (15.1) sliding from the initial position to the second sliding region, -switching on the first proportional valve (12.1) to switch off the first pilot-controlled valve (2.1), -switching on the fifth proportional valve (13.3) to switch on the first pilot-controlled end of the second pilot-controlled directional control valve (10), -upon receiving a control signal that the first control button (15.1) slides from the second sliding area to the initial position, the first proportional valve (12.1) is disconnected to enable the first hydraulic control valve (2.1) to be switched on, and the fifth proportional valve (13.3) is disconnected to enable the first hydraulic control end of the second hydraulic control reversing valve (10) to be switched off.

14. Pile-driver hydraulic control system according to claim 8, comprising a second pressure sensor (11) for detecting the on-off condition of the foot valve (12.3), wherein the second pressure sensor (11) is arranged on a pipeline between an oil outlet of the foot valve (12.3) and a hydraulic control end of the third hydraulic control valve (2.3), the controller (16) is electrically connected with the second pressure sensor (11), and the controller (16) is configured to receive a pressure signal of the second pressure sensor (11) and control the first control valve group (12) and the second control valve group (13) to work according to the pressure signal.

15. Pile-driver hydraulic control system according to claim 14, wherein the controller (16) is configured to switch on the first proportional valve (12.1) to switch off the first pilot-controlled valve (2.1), switch off the third proportional valve (13.1) to switch off the first pilot-controlled end of the first pilot-controlled directional valve (6), and switch off the fourth proportional valve (13.2) to switch off the second pilot-controlled end of the first pilot-controlled directional valve (6) when the second pressure sensor (11) detects a pressure signal.

16. Pile driver hydraulic control system according to claim 15, wherein the control handle comprises a second control button (15.2), the controller (16) being configured to switch on the second proportional valve (12.2) to switch off the second hydraulic valve (2.2) upon receiving a control signal that the second control button (15.2) is pressed, and to switch off the second proportional valve (12.2) to switch on the second hydraulic valve (2.2) upon receiving a control signal that the second control button (15.2) is released.

17. Pile driver hydraulic control system according to claim 15 or 16, wherein the control handle comprises a third control button (15.3), the third control button (15.3) having an on state and an off state, the controller (16) being configured to switch on the fifth proportional valve (13.3) to switch on the first hydraulic control end of the second hydraulically controlled directional valve (10) upon receiving a control signal that the third control button (15.3) is switched to the on state.

18. Pile driver hydraulic control system according to claim 8, wherein the control handle comprises a fourth control button (15.4), the fourth control button (15.4) being slidably arranged on the control handle.

19. Pile driver hydraulic control system according to claim 18, characterised in that the fourth control button (15.4) has an initial position and a first sliding area, the controller (16) is configured to receive a control signal of the fourth control button (15.4) sliding from the initial position to the first sliding region, -switching on the first proportional valve (12.1) to switch off the first pilot-controlled valve (2.1), -switching on the third proportional valve (13.1) to switch on the first pilot-controlled end of the first pilot-controlled directional valve (6), -upon receiving a command signal for the fourth control button (15.4) to slide from the first sliding area to the initial position, and disconnecting the first proportional valve (12.1) to enable the first hydraulic control valve (2.1) to be connected, and disconnecting the third proportional valve (13.1) to enable the first hydraulic control end of the first hydraulic control reversing valve (6) to be cut off.

20. Pile driver hydraulic control system according to claim 19, wherein the fourth control button (15.4) has an initial position and a second sliding area, the controller (16) is configured to receive a control signal of the fourth control button (15.4) sliding from the initial position to the second sliding region, -switching on the first proportional valve (12.1) to switch off the first pilot-controlled valve (2.1), -switching on the fourth proportional valve (13.2) to switch on the second pilot-controlled end of the first pilot-controlled directional control valve (6), -upon receiving a control signal that the fourth control button (15.4) slides from the second sliding area to the initial position, and disconnecting the first proportional valve (12.1) to enable the first hydraulic control valve (2.1) to be switched on, and disconnecting the fourth proportional valve (13.2) to enable the second hydraulic control end of the first hydraulic control reversing valve (6) to be switched off.

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