阅读说明：本技术 打桩机振动作业控制系统及打桩机 (Pile driver vibration operation control system and pile driver ) 是由 简立瑞 张箭 董玉忠 张明更 王全永 李亚东 苗衡 卢杰 付志恒 于 2020-05-29 设计创作，主要内容包括：本发明涉及一种打桩机振动作业控制系统及打桩机,其中,打桩机振动作业控制系统包括：油箱；马达；第一泵,通过油路连接油箱和马达；主阀,设于第一泵与马达之间的油路,主阀包括第一工位和第二工位,主阀被配置为在第一工位时,连通第一泵与马达之间的油路,主阀被配置为在第二工位时,断开第一泵与马达之间的油路；第一脚踏阀,被配置为可选择性地连通油箱与主阀的控制端之间的油路,使主阀处于第一工位,或断开油箱与主阀的控制端之间的油路,使主阀处于第二工位；第二泵,为变量泵,第二泵的输出端通过油路连接第一泵与主阀之间的油路；以及控制阀组,被配置为控制第二泵的开启和断开,且控制第二泵的排量,以提高打桩机的作业效率。(The present invention relates to a pile driver vibration operation control system and a pile driver, wherein the pile driver vibration operation control system includes: an oil tank; a motor; the first pump is connected with the oil tank and the motor through an oil way; the main valve is arranged in the oil path between the first pump and the motor and is used for connecting the oil path between the first pump and the motor when the main valve is arranged at the first station and disconnecting the oil path between the first pump and the motor when the main valve is arranged at the second station; the first foot valve is configured to selectively communicate an oil path between the oil tank and the control end of the main valve to enable the main valve to be in a first working position, or disconnect the oil path between the oil tank and the control end of the main valve to enable the main valve to be in a second working position; the output end of the second pump is connected with an oil way between the first pump and the main valve through an oil way; and a control valve bank configured to control the opening and closing of the second pump and to control the displacement of the second pump to improve the efficiency of the pile driver.)

1. A pile driver vibratory operation control system, comprising:

an oil tank (1);

a motor (2);

a first pump (3) that connects the oil tank (1) and the motor (2) via an oil path;

a main valve (4) provided in an oil path between the first pump (3) and the motor (2), the main valve (4) including a first position and a second position, the main valve (4) being configured to communicate the oil path between the first pump (3) and the motor (2) in the first position, and the main valve (4) being configured to disconnect the oil path between the first pump (3) and the motor (2) in the second position;

a first foot valve (5) configured to selectively communicate the oil path between the tank (1) and the control end of the main valve (4) to place the main valve (4) in a first position, or to disconnect the oil path between the tank (1) and the control end of the main valve (4) to place the main valve (4) in a second position;

the second pump (6) is a variable pump, and the output end of the second pump (6) is connected with an oil way between the first pump (3) and the main valve (4) through an oil way; and

a set of control valves configured to control the opening and closing of the second pump (6) and to control the displacement of the second pump (6).

2. Pile-driver vibratory work control system as claimed in claim 1, wherein the control valve pack comprises a bypass valve (7), a first port of the bypass valve (7) being connected by an oil path to the output of the second pump (6), a second port of the bypass valve (7) being connected by an oil path to a swash plate of the second pump (6); the opening amount of the bypass valve (7) is adjustable to adjust the swing angle of the swash plate so as to adjust the displacement of the second pump (6);

when the opening amount of the bypass valve (7) is minimum, the swash plate swing angle of the second pump (6) is maximum, the second pump (6) works at the maximum displacement, and the second pump (6) and the first pump (3) supply oil to the motor (2) together through a main valve (4);

when the opening amount of the bypass valve (7) is maximum, the swash plate swing angle of the second pump (6) is minimum, and the displacement of the second pump (6) is minimum.

3. Pile-driver vibratory work control system as claimed in claim 2, characterized in that the control valve block comprises a proportional valve (8), the proportional valve (8) being connected by an oil circuit to the control end of the bypass valve (7) and the oil tank (1), the opening of the proportional valve (8) being adjustable for adjusting the amount of oil entering the control end of the bypass valve (7) and thus the opening of the bypass valve (7).

4. Pile driver vibratory work control system as claimed in claim 3, wherein the control valve pack comprises a controller (9) and a pilot handle (10), the controller (9) electrically connecting the pilot handle (10) and the proportional valve (8), the controller (9) being configured to send an electrical signal to the proportional valve (8) to control the opening amount of the proportional valve (8) in dependence of the action of the pilot handle (10).

5. Pile driver vibration work control system according to claim 4, comprising a motor (11), said motor (11) drivingly connecting said first pump (3) and said second pump (6), said controller (9) being electrically connected to said motor (11), said controller (9) being configured to signal said motor (11) to increase the rotational speed and power to increase the output power of said first pump (3) and said second pump (6) after actuation of said pilot handle (10) to a set position.

6. Pile-driver vibratory work control system as claimed in claim 3, characterized by comprising a second foot valve (12), the second foot valve (12) connecting the control end of the bypass valve (7) and the oil tank (1) by an oil path, the second foot valve (12) being configured to selectively communicate the oil path between the oil tank (1) and the control end of the bypass valve (7) to minimize the opening amount of the bypass valve (7) or to disconnect the oil path between the oil tank (1) and the control end of the bypass valve (7) to maximize the opening amount of the bypass valve (7).

7. Pile-driver vibration work control system according to claim 6, characterized by comprising a shuttle valve (13), wherein a first oil inlet of the shuttle valve (13) is connected with the proportional valve (8), a second oil inlet of the shuttle valve (13) is connected with the second foot valve (12), and an oil outlet of the shuttle valve (13) is connected with a control end of the bypass valve (7).

8. Pile-driver vibratory work control system according to claim 6, characterized by a third pump (14), the input of the third pump (14) being connected to the oil tank (1), the output of the third pump (14) being connected to the first foot valve (5), the second foot valve (12) and the proportional valve (8), respectively.

9. Pile-driver vibratory work control system according to claim 7, characterized in that the first foot valve (5) can be selectively operated alone, or the first foot valve (5) can be operated in conjunction with the proportional valve (8), or the first foot valve (5) can be operated in conjunction with the second foot valve (12).

10. Pile driver comprising a pile driver vibratory operation control system as claimed in any of claims 1-9.

Technical Field

The invention relates to the field of engineering machinery, in particular to a pile driver vibration operation control system and a pile driver.

Background

In construction engineering, pile drivers are widely used in infrastructure construction. The working condition of the pile driver is mainly characterized in that high-frequency vibration generated by a machine body can be utilized during pile driving and pile pulling operation, soil around a pile body is liquefied, a connecting structure is changed, the friction force between the pile body and the soil is reduced, and then the pile body is sunk into or pulled out of the soil by the large arm lifting force of the excavator, so that the construction operation process is completed. The related pile driver has low efficiency under actual special geological working conditions, and the phenomena of 'driving immovable and pulling-out' occur.

Disclosure of Invention

Some embodiments of the invention provide a pile driver vibration work control system and a pile driver, which are used for alleviating the problem of low work efficiency.

Some embodiments of the invention provide a pile driver vibratory work control system, comprising:

an oil tank;

a motor;

a first pump connected to the oil tank and the motor through an oil passage;

a main valve provided in an oil path between the first pump and the motor, the main valve including a first position and a second position, the main valve being configured to communicate the oil path between the first pump and the motor in the first position, and the main valve being configured to disconnect the oil path between the first pump and the motor in the second position;

a first foot valve configured to selectively communicate an oil path between the oil tank and a control end of the main valve to place the main valve in a first position, or to disconnect the oil path between the oil tank and the control end of the main valve to place the main valve in a second position;

the output end of the second pump is connected with an oil way between the first pump and the main valve through an oil way; and

a control valve set configured to control opening and closing of the second pump and to control displacement of the second pump.

In some embodiments, the control valve group comprises a bypass valve, a first oil port of the bypass valve is connected with the output end of the second pump through an oil path, and a second oil port of the bypass valve is connected with a swash plate of the second pump through an oil path; the opening amount of the bypass valve is adjustable so as to adjust the swing angle of the swash plate and further adjust the displacement of the second pump;

when the opening amount of the bypass valve is minimum, the swash plate swing angle of the second pump is maximum, the second pump works at the maximum displacement, and the second pump and the first pump supply oil to the motor together through a main valve;

when the opening amount of the bypass valve is maximum, the swash plate swing angle of the second pump is minimum, and the displacement of the second pump is minimum.

In some embodiments, the control valve group comprises a proportional valve, the proportional valve is connected with the control end of the bypass valve and the oil tank through an oil path, and the opening amount of the proportional valve is adjustable to adjust the oil amount entering the control end of the bypass valve so as to adjust the opening amount of the bypass valve.

In some embodiments, the control valve group comprises a controller and a pilot handle, the controller is electrically connected with the pilot handle and the proportional valve, and the controller is configured to send an electric signal to the proportional valve according to the action of the pilot handle so as to control the opening amount of the proportional valve.

In some embodiments, the engine is in driving connection with the first pump and the second pump, the controller is electrically connected with the engine, and the controller is configured to send signals for increasing the rotating speed and power to the engine after the pilot handle action reaches a set position so as to increase the output power of the first pump and the second pump.

In some embodiments, the control device further comprises a second foot valve connected to the control end of the bypass valve and the oil tank via an oil path, and the second foot valve is configured to selectively communicate the oil path between the oil tank and the control end of the bypass valve to minimize the opening amount of the bypass valve or to disconnect the oil path between the oil tank and the control end of the bypass valve to maximize the opening amount of the bypass valve.

In some embodiments, the control valve comprises a shuttle valve, a first oil inlet of the shuttle valve is connected with the proportional valve, a second oil inlet of the shuttle valve is connected with the second foot valve, and an oil outlet of the shuttle valve is connected with a control end of the bypass valve.

In some embodiments, the system comprises a third pump, an input end of the third pump is connected with the oil tank, and an output end of the third pump is respectively connected with the first foot valve, the second foot valve and the proportional valve.

In some embodiments, the first foot valve may be selectively operated alone, or in combination with the proportional valve, or in combination with the second foot valve.

Some embodiments of the invention provide a pile driver comprising a pile driver vibratory work control system as described above.

Based on the technical scheme, the invention at least has the following beneficial effects:

in some embodiments, the opening and closing of the second pump to the first pump in a confluence mode is controlled through the control valve group, the displacement of the second pump is controlled, the first pump can supply oil to the motor independently, or the first pump and the second pump in a confluence mode supply oil to the motor, the power output of the first pump and the power output of the second pump can be adjusted according to the load, the input power of the pile driver is further improved, multiple geological conditions are met, and the operation efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic diagram of the control principle of a pile driver vibratory work control system according to some embodiments of the invention;

FIG. 2 is a simplified diagram of a pile driver vibratory work control system using hydraulic control to control vibration mode power output according to some embodiments of the present invention;

FIG. 3 is a block diagram providing electro-hydraulic control of a pile driver vibration operation control system to control vibration mode power output according to some embodiments of the present invention.

The reference numbers in the drawings illustrate the following:

1-an oil tank; 2-a motor; 3-a first pump; 4-a main valve; 5-a first foot valve; 6-a second pump; 7-a bypass valve; 8-a proportional valve; 9-a controller; 10-a pilot handle; 11-an engine; 12-a second foot valve; 13-a shuttle valve; 14-third pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

As shown in fig. 1, some embodiments provide a pile driver vibratory work control system including a fuel tank 1, a motor 2, a first pump 3, a main valve 4, a first foot valve 5, a second pump 6, and a control valve block.

The motor 2 is a pile driver motor for providing vibratory power.

The first pump 3 is connected to the oil tank 1 and the motor 2 via an oil passage. The first pump 3 is a variable displacement pump.

The main valve 4 is provided in an oil path between the first pump 3 and the motor 2. The main valve 4 comprises a first station and a second station. The main valve 4 is configured to communicate with an oil path between the first pump 3 and the motor 2 in the first position, and the first pump 3 supplies oil to the motor 2. The main valve 4 is configured to cut off the oil path between the first pump 3 and the motor 2 and stop the first pump 3 from supplying oil to the motor 2 in the second position.

The first foot valve 5 is configured to selectively communicate an oil path between the oil tank 1 and a control end of the main valve 4, the control end of the main valve 4 being used to control the main valve 4 in the first position. The first foot valve 5 is configured to selectively disconnect the oil circuit between the tank 1 and the control end of the main valve 4, the main valve 4 being in the second position.

The second pump 6 is a variable displacement pump. The output end of the second pump 6 is connected with the oil path between the first pump 3 and the main valve 4 through the oil path. The control valve group is configured to control the opening and closing of the second pump 6 and to control the displacement of the second pump 6.

After the control valve set controls the second pump 6 to be opened, the second pump 6 and the first pump 3 simultaneously supply oil to the motor 2 through the main valve 4, and the control valve set can control the displacement of the second pump 6.

After the control valve group controls the second pump 6 to be closed, the first pump 3 supplies oil to the motor 2.

Typically, the efficiency of the pile driver increases at high loads, requiring higher power output. Therefore, in some embodiments of the present disclosure, the opening and closing of the confluence from the second pump 6 to the first pump 3 is controlled by the control valve set, and the displacement of the second pump 6 is controlled, so that the first pump 3 alone supplies oil to the motor 2, or the first pump 3 and the second pump 6 confluence supply oil to the motor 2, and the power output of the first pump 3 and the second pump 6 can be adjusted according to the load, thereby improving the power input of the pile driver, being applicable to various special geological conditions, and being beneficial to better exerting the operation efficiency under different geological conditions.

Optionally, the main valve 4 is a directional valve.

In some embodiments, the control valve set comprises a bypass valve 7, a first oil port of the bypass valve 7 is connected with the output end of the second pump 6 through an oil path, and a second oil port of the bypass valve 7 is connected with a swash plate of the second pump 6 through an oil path; the opening amount of the bypass valve 7 is adjustable to adjust the swash angle of the swash plate, and thus the displacement of the second pump 6.

When the opening amount of the bypass valve 7 is minimized, the swash plate swing angle of the second pump 6 is maximized, the second pump 6 operates at the maximum displacement, and the second pump 6 and the first pump 3 can supply oil to the motor 2 through the main valve 4 together.

When the opening amount of the bypass valve 7 is the largest, the swash plate swing angle of the second pump 6 is the smallest, the displacement volume of the second pump 6 is the smallest, and the first pump 3 alone supplies oil to the motor 2.

In some embodiments, the control valve group comprises a proportional valve 8, the proportional valve 8 is connected with the control end of the bypass valve 7 and the oil tank 1 through an oil path, and the opening amount of the proportional valve 8 is adjustable to adjust the oil amount entering the control end of the bypass valve 7, so that the opening amount of the bypass valve 7 is adjusted.

In some embodiments, the control valve group comprises a controller 9 and a pilot handle 10, the controller 9 electrically connects the pilot handle 10 and the proportional valve 8, and the controller 9 is configured to send an electric signal to the proportional valve 8 according to the action of the pilot handle 10 to control the opening amount of the proportional valve 8.

In some embodiments, the pilot handle 10 is integrated with an electrical feather key.

During operation of the pile driver, the first foot valve 5 is first depressed, the pile driver starts to operate in the primary vibration mode, the first pump 3 supplies oil, and the power output of the pile driver is P11, as shown in fig. 3. The electric sliding key of the pilot handle 10 is slid, different voltage signals are output to the controller 9 according to the displacement of the sliding key, the controller 9 outputs different current signals to the proportional valve 8, the proportional valve 8 outputs different pressures to act on the control end of the bypass valve 7, the valve core of the bypass valve 7 generates different displacements due to the different pressures, the negative feedback port N2 of the bypass valve 7 outputs different pressure values to control the swash plate swing angle of the second pump 6, the displacement of the second pump 6 is further controlled, and finally the flow merging amount of the first pump 3 and the second pump 6 is controlled, so that the power output range of the pile driver is (P11, P12), and the change of the vibration frequency is realized as shown in FIG. 3.

In some embodiments, as shown in fig. 1, the pile driver vibration work control system comprises a motor 11, the motor 11 is drivingly connected to the first pump 3 and the second pump 6, the controller 9 is electrically connected to the motor 11, and the controller 9 is configured to signal the motor 11 to increase its speed and power to increase the output power of the first pump 3 and the second pump 6 after the electrical sliding key of the pilot handle 10 has slid to a set position, when the power output of the pile driver is P13, as shown in fig. 3.

When the electrical slide key of the pilot handle 10 slides to the set position, the output flow of the second pump 6 reaches the maximum value at this time. If the sliding key is continuously slid, the controller 9 detects that the voltage value exceeds the initial voltage value set by the program, the controller 9 controls the engine 11 to increase the rotating speed of the engine 11, so that the output power of the engine 11 is increased, the power of the second pump 6 and the first pump 3 is increased, the vibration efficiency is improved, and the operation is convenient.

An electric sliding key on the pilot handle 10 can control the pile driver from a primary vibration mode to a secondary vibration mode and from the secondary vibration mode to a tertiary vibration mode; and the sliding key has two sections of different damping operation modes, so that an operator can feel the change of feeling from primary vibration to secondary vibration and then to tertiary vibration through touch, and the change can be felt through vibration frequency.

By using an electro-hydraulic control mode consisting of the pilot handle 10, the controller 9 and the proportional valve 8, the efficiency of piling and pile pulling operation of the pile driver can be improved by changing the output power of the engine 11 and improving the power of the first pump 3 and the second pump 6 on the basis of two-stage vibration confluence; and the step or linear output of the vibration frequency between the gears can be realized, and the method is suitable for various geological environments.

In some embodiments, as shown in fig. 1, the pile driver vibratory work control system comprises a second foot valve 12, the second foot valve 12 connecting the control end of the bypass valve 7 and the oil tank 1 by an oil path, the second foot valve 12 being configured to selectively communicate the oil path between the oil tank 1 and the control end of the bypass valve 7 to minimize the amount of opening of the bypass valve 7. The second foot valve 12 is also configured to selectively disconnect the oil path between the oil tank 1 and the control end of the bypass valve 7 to maximize the opening amount of the bypass valve 7.

When the first foot valve 5 is depressed, the pile driver starts to operate in the primary vibration mode, the first pump 3 supplying oil. When meeting special geological conditions, the second foot valve 12 is simultaneously pressed, the pile driver starts to work in a two-stage vibration mode, and the first pump 3 and the second pump 6 simultaneously supply oil to the motor 2, so that the vibration power is improved, and the working efficiency of pile driving or pile pulling is improved.

In some embodiments, the pile driver vibration work control system comprises a shuttle valve 13, a first oil inlet of the shuttle valve 13 is connected with the proportional valve 8, a second oil inlet of the shuttle valve 13 is connected with the second foot valve 12, and an oil outlet of the shuttle valve 13 is connected with the control end of the bypass valve 7.

In some embodiments, the proportional valve 8 and the second foot valve 12 can be connected through the shuttle valve 13 to respectively control the vibration confluence of the second pump 6, and the pressure of the negative feedback port N2 of the bypass valve 7 can control the linear proportional output of the flow rate of the confluence of the second pump 6, so that the stepless speed regulation from primary vibration to secondary vibration is realized. The three-level vibration requires the controller 9 to detect a set voltage value, and then control the power of the engine 11, so as to realize step control from the two-level vibration to the three-level vibration, as shown in fig. 3.

In some embodiments, the shuttle valve 13 is a joint type shuttle valve, and can be directly installed on the corresponding oil port without adding a mounting seat.

The pilot handle 10 is connected to the input end of the controller 9 through an electric wire harness, and the proportional valve 8 is connected to the output end of the controller 9 through the electric wire harness.

In some embodiments, the pile driver vibration work control system comprises a third pump 14, the input end of the third pump 14 is connected with the oil tank 1, and the output end of the third pump 14 is respectively connected with the first foot valve 5, the second foot valve 12 and the proportional valve 8.

In some embodiments, the pile-driver vibratory operation control system is operable to operate the first foot valve 5 alone, or the first foot valve 5 in cooperation with the proportional valve 8, or the first foot valve 5 in cooperation with the second foot valve 12.

In some embodiments, the first foot valve 5 and the second foot valve 12 are single-connection foot valves, and the first foot valve 5 and the second foot valve 12 control the vibration operation of the pile driver in a unidirectional manner, i.e. only one direction of motion can be controlled.

As shown in fig. 2, when the first foot valve 5 and the second foot valve 12 cooperate to control the vibration mode of the pile driver, the primary vibration to the secondary vibration is a step control, and the power output is directly increased from P11 to P12. As shown in fig. 3, the first foot valve 5, the proportional valve 8 and the pilot handle 10 cooperate to control the vibration mode of the pile driver, the primary to secondary vibration is linear proportional control, the power output varies from P11 to P12, the secondary to tertiary vibration is step control, and the power output is directly increased from P12 to P13.

Some embodiments provide a pile driver comprising a pile driver vibratory work control system as described above. The pile driver includes a primary vibration mode, a secondary vibration mode, and a tertiary vibration mode.

The first foot valve 5 works alone to control the pile driver in the primary vibration mode, the first foot valve 5 and the second foot valve 12 work in cooperation to control the pile driver in the secondary vibration mode, and the first foot valve 5, the proportional valve 8 and the pilot handle 10 work in cooperation to control the pile driver in the primary to tertiary vibration speed regulation mode.

The first foot valve 5 and the second foot valve 12 are in a hydraulic control mode, and the first foot valve 5, the proportional valve 8 and the pilot handle 10 are matched in an electro-hydraulic control mode, and the two control modes can be freely selected. Namely: the two pedals realize the secondary speed regulation of the vibration operation; a pedal and a sliding key realize a stepless speed regulation mode from primary vibration to secondary vibration and a step control mode from secondary vibration to tertiary vibration. Both modes of operation require first depressing the first foot valve 5, which controls the primary vibration, and then depressing the second foot valve 12 or electrical slide keys on the sliding pilot handle 10.

In some embodiments, the pile driver may implement different vibration modes in a hydraulic control mode and an electro-hydraulic control mode, as follows:

the hydraulic control mode is as follows:

first-order vibration mode: when the pedal of the first foot valve 5 is stepped on, the oil path of the port P and the oil path of the port a of the first foot valve 5 are connected, the oil in the oil tank 1 is pumped into the first foot valve 5 through the third pump 14, enters the control end XAo of the main valve 4 through the first foot valve 5, the valve core of the main valve 4 is controlled to be reversed, the main valve 4 is in the first working position, at this time, the high-pressure oil pumped out by the first pump 5 flows to the working oil port M of the motor 3 through the main valve 4, and the pile driver starts the primary vibration mode. The pile driver is supplied with oil to the motor 3 mainly by the first pump 3 in the primary vibration mode.

Secondary vibration mode: when the pedal of the first pedal valve 5 is firstly pressed, the first-stage vibration mode starts to work, then the second pedal valve 12 is pressed, the oil circuit of the P1 port and the A1 port of the second pedal valve 12 is communicated, oil in the oil tank 1 is pumped into the second pedal valve 12 through the third pump 14, enters the shuttle valve 13 through the second pedal valve 12, enters the control end of the bypass valve 7 through the shuttle valve 13, the opening amount of the bypass valve 7 is minimum, the pressure of the negative feedback port N2 of the bypass valve 7 is minimum at the moment, the swing angle of the second pump 6 is maximum, the second pump 6 starts to work at the maximum swash plate swing angle, the displacement is maximum, hydraulic oil pumped out by the second pump 6 flows into the main valve 4 through the confluence one-way valve, and the confluence of the second-stage vibration of the first pump 3 and the second pump 6 is realized.

When different vibration modes are realized in a hydraulic control mode, the first-stage vibration and the first-stage vibration to the second-stage vibration are all controlled in a step mode, as shown in fig. 2.

An electro-hydraulic control mode:

first-order vibration mode: when the pedal of the first foot valve 5 is stepped on, the oil path of the port P and the oil path of the port a of the first foot valve 5 are connected, the oil in the oil tank 1 is pumped into the first foot valve 5 through the third pump 14, enters the control end XAo of the main valve 4 through the first foot valve 5, the valve core of the main valve 4 is controlled to be reversed, the main valve 4 is in the first working position, at this time, the high-pressure oil pumped out by the first pump 5 flows to the working oil port M of the motor 3 through the main valve 4, and the pile driver starts the primary vibration mode. The pile driver is supplied with oil to the motor 3 mainly by the first pump 3 in the primary vibration mode.

Secondary vibration mode: the pedal of the first foot valve 5 is firstly stepped, the first-stage vibration mode starts to work at the moment, then the sliding key of the pilot handle 10 is slid, different displacements can be generated in the process of sliding the sliding key of the pilot handle 10, the manipulator can sense a certain damping value through touch at the moment, the controller 9 receives different voltage signals and converts the voltage signals into corresponding current signals, and the proportional valve 8 is controlled to output changed pressure signals. Due to different pressure effects, the valve core of the bypass valve 7 generates different displacements, the negative feedback port N2 of the bypass valve 7 outputs different pressure values and controls the swash plate swing angle of the second pump 6, so that the second pump 6 outputs different flow values, and the flow values are merged with the flow of the first pump 3 and enter the motor 2, and linear control from primary vibration to secondary vibration is realized.

Three-level vibration mode: when the sliding key of the sliding pilot handle 10 reaches the set position and continues to slide, the sliding key can generate different damping effects at the moment, the tactile sensation of an operator can obviously sense the pressure change, the controller 9 detects that the voltage signal at the moment exceeds the program initial set value, and the controller 9 controls the engine 11 to increase the rotating speed and the power so as to increase the output power of the first pump 3 and the second pump 6 and realize a three-stage vibration mode. The three-level vibration achieves the purpose of automatically changing the output power of the main pump under a special geological environment by a method of improving the rotating speed and the power of the engine 11.

Under the condition that different vibration modes are realized by adopting an electro-hydraulic control mode, the first-stage vibration is step control, the first-stage vibration and the second-stage vibration are linear control, and the second-stage vibration and the third-stage vibration are step control, as shown in figure 3.

According to the pile driver vibration operation control system provided by some embodiments of the disclosure, one-level vibration step control and one-level vibration to two-level vibration step control are realized by artificially sensing the characteristics of the load construction working condition, or the one-level vibration to two-level vibration linear control is realized, stepless speed regulation of pile driver vibration operation is realized, the output power of a main pump is improved through electric signal identification control, and three-level vibration step control is realized, so that the operation efficiency is improved under different geological hardness.

Some embodiments of the disclosure can realize the free switching of the hydraulic control mode and the electro-hydraulic control mode, meet different operation requirements, realize different power outputs from first-level vibration to third-level vibration, and meet different geological conditions.

In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are used only for the convenience of distinguishing the 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 invention.

Furthermore, the technical features of one embodiment may be combined with one or more other embodiments advantageously without explicit negatives.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.