Offshore mute wind power pile driver

Abstract

The offshore mute wind power pile driver comprises a pile column, a clamping system and a vibration system, and the clamping system is in sliding connection with the vibration system; the vibration system comprises a vibration system shell, a plurality of vibrators are fixedly arranged in the vibration system shell, each vibrator comprises a vibrator shell and a double-shaft motor mounted in the vibrator shell, each motor shaft of the double-shaft motor penetrates through the vibrator shell, and a cam is arranged at the tail end of each motor shaft; a plurality of grooves are formed in the bottom face of the vibration system shell, and the cams penetrate through the grooves in the rotating process. After the double-shaft motor is started, the cam is driven to rotate, and when the flange of the cam penetrates through the groove and makes contact with the upper surface of the clamping system, the vibration system moves upwards. When the flange of the cam leaves the upper surface of the clamping system, the vibration system falls down, and the vibration effect is achieved by reciprocating; the clamping system clamps the pile, and vibration energy is transmitted to the pile through the clamping system until the pile is driven into the seabed. The piling noise can be reduced, and the method is more efficient and more environmentally friendly compared with a traditional mode.

Description

Technical Field

[0001] The present invention relates to offshore wind farm construction technology, and in particular to an offshore silent wind power pile driver. Background Art

[0002] In recent years, the number of offshore wind farms approved for construction has steadily increased globally. Currently, the vast majority of offshore wind turbines utilize fixed foundation structures, primarily including monopile foundations, shallow gravity foundations, high-pile cap foundations, and bucket foundations. Monopile foundations are the most widely used due to their simple structure, mature manufacturing technology, rapid installation, and high adaptability to various seabeds.

[0003] During the driving of a single pile, the instantaneous impact from the pile top causes the pile wall to vibrate violently, radiating high-intensity underwater noise into the surrounding sea. This impacts the living environment of marine life (such as foraging, habitat selection, migration, and migration), disrupting the balance of the marine ecosystem and contradicting the original intention of harmonious coexistence between man and nature. Furthermore, the high seabed resistance encountered during traditional punch pile driving makes construction difficult and time-consuming, while also resulting in low efficiency and high costs. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a silent offshore wind power pile driver that can reduce pile driving noise.

[0005] Technical solution: An offshore silent wind power pile driver of the present invention includes a pile column, a clamping system is installed on the top of the pile column, a vibration system is coaxially arranged above the clamping system, and the clamping system and the vibration system are slidably connected; the vibration system includes a vibration system housing, and a plurality of vibrators are fixedly installed inside the vibration system housing, each vibrator includes a vibrator housing and two sets of dual-axis motors installed in the vibrator housing, each motor shaft of the dual-axis motor passes through the vibrator housing, and a cam is provided at the end of each motor shaft, and the cam is located on the outside of the vibrator housing; a plurality of slots for the cam to move are provided on the bottom surface of the vibration system housing, and the cam passes through the slots during rotation; after the dual-axis motor is started, it drives the cam to rotate, and when the flange of the cam passes through the slot and contacts the upper surface of the clamping system, the vibration system moves upward; when the cam flange leaves the upper surface of the clamping system, the vibration system falls, and the vibration effect is achieved by repeating this process; the clamping system clamps the pile column, and the vibration energy is transmitted to the pile column through the clamping system until the pile column is driven into the seabed.

[0006] Furthermore, the clamping system includes a clamping platform, and a plurality of slide rails are arranged circumferentially on the bottom surface of the clamping platform, and a clamp is installed on each slide rail; a push rod is passed through the outside of the clamp, and the head of the push rod is in the clamping space of the clamp; the clamp moves toward the center of the clamping platform along the slide rail, and after the pile column is embedded in the clamp, the push rod is pushed so that the head of the push rod rests on the outside of the pile column.

[0007] Furthermore, a sliding rod is vertically arranged in the center of the clamping platform, a through hole is opened in the center of the vibration system shell, a sliding groove is arranged above the through hole, and the sliding rod passes through the through hole and cooperates with the sliding groove to realize the sliding connection between the clamping system and the vibration system.

[0008] Furthermore, a pile bottom flushing system is provided in the pile column, and a water pipe is connected to the pile bottom flushing system. The free end of the water pipe passes through the clamping system and the vibration system, and water is supplied to the pile bottom flushing system through the water pipe.

[0009] Furthermore, the pile bottom flushing system includes a high-pressure water tank, the top surface of the high-pressure water tank is connected to the water pipe, the bottom surface of the high-pressure water tank is connected to the rotary spray head, and a plurality of water outlets are arranged at the head of the rotary spray head.

[0010] Furthermore, a plurality of positioning rods are provided on the outer wall of the high-pressure water tank, and the installation heights of the plurality of positioning rods are the same. One end of each positioning rod is hingedly connected to the outer wall of the high-pressure water tank, and a roller is installed on the other end. A spring is provided below the hinge between the positioning rod and the high-pressure water tank, and the positioning rod is supported by the spring, thereby pressing the roller against the inner wall of the pile column.

[0011] Furthermore, the high-pressure water tank adopts a layered pressure-resistant cabin, a three-cylinder plunger pump is used inside, and a permanent magnet synchronous motor drives the three-cylinder plunger pump to operate.

[0012] Furthermore, a plurality of drainage holes are provided on the top of the pile.

[0013] Furthermore, a drainage pipe is installed on the drainage hole, and the drainage pipe is connected to a pump, and the water inside the pile is pumped out by the pump.

[0014] Furthermore, a rubber pad is provided on the push rod head.

[0015] Beneficial effects: Compared with the prior art, the significant technical effects of the present invention are as follows: (1) The present invention designs a vibration system and adopts vibration piling, which significantly reduces piling noise and piling difficulty, improves the construction quality of piles, improves construction safety, and makes piling more efficient; (2) The vibration system adopts four vibrators with a compact structure, which improves piling efficiency and saves costs; (3) The clamping platform is designed to be circular, which fits the pile head better and improves piling efficiency; the clamp adopts a four-claw clamp, which can move and adjust the opening size and is suitable for piles of various sizes; (4) A pile bottom flushing system is designed, which uses a rotary jet device to eject high-pressure water flow during piling to disperse the mud and sand at the bottom of the pile, greatly reducing the piling resistance, thereby reducing the piling frequency, reducing noise, and saving energy; minimizing the impact on marine life, making wind farm construction more environmentally friendly, and promoting harmonious coexistence between man and nature; at the same time, many parts of the present invention are highly versatile and can be mass-produced to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a front view of the present invention;

[0018] Figure 3 is a side view of the present invention;

[0019] Figure 4 is a top view of the present invention;

[0020] Figure 5 It is the main view of the clamping system;

[0021] Figure 6 This is a top view of the clamping system;

[0022] Figure 7 It is a structural diagram of the vibration system;

[0023] Figure 8 It is a top view of the vibration system;

[0024] Figure 9 This is the main view of the internal structure of the vibration machine;

[0025] Figure 10 This is the main view of the pile bottom scouring system;

[0026] Figure 11 It is a schematic diagram of the preparation stage of the present invention;

[0027] Figure 12 It is a schematic diagram when the vibration system moves up to the highest point;

[0028] Figure 13 This is a schematic diagram of the vibration system when it moves to the lowest point. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below in conjunction with specific implementation methods and the accompanying drawings.

[0030] The offshore silent wind power pile driver of the present invention is a silent wind power pile driving technology used on offshore wind power installation ships. The present invention takes the wind power platform single pile foundation as an example. The single pile foundation has the characteristics of light weight, simple structure and clear force, while taking into account economy and wide application. It includes four important components: pile body, clamping system, vibration system and pile bottom flushing system. Figure 1-10As shown, the present invention specifically relates to the following components: a water pipe 1, a vibration system housing 2, a drainage hole 3, a first drainage pipe 4, a second drainage pipe 5, a pile 6, a clamping platform 7, a clamp 8, a high-pressure water chamber 9, a rotary nozzle 10, a positioning rod 11, a slide rod 12, a slide rail 13, a push rod 14, a vibration system housing 15, a vibration machine housing 16, a dual-axis motor 17, a cam 18, a slide 19, a wet-plug hydraulic joint 20, a spring 21, and a roller 22.

[0031] like Figure 1-3 As shown, a clamping system is installed on the top of the pile body, a vibration system is coaxially arranged above the clamping system, the clamping system and the vibration system are slidingly connected, and the pile bottom flushing system is arranged inside the pile body.

[0032] The pile body consists of a pile column 6, a first drainage pipe 4, and a second drainage pipe 5. Based on a single wind turbine platform pile, pile column 6 is one of the most common support structures for offshore wind power. A single large-diameter steel pipe pile (typically 4-8 meters in diameter) is vertically embedded in the seabed, bearing the entire load of the wind turbine tower, nacelle, and blades, while also resisting dynamic loads such as wind, waves, and ocean currents. The main body of pile column 6 is made of refined steel, which has excellent tensile strength and fatigue resistance, capable of withstanding high-frequency vibration and seawater impact loads. Its length is determined by the specific sea area where it is installed. A clamping system is installed on the top of pile column 6, and a bottom flushing system is installed inside pile column 6.

[0033] like Figure 2 and Figure 3 As shown, the top of the pile 6 has multiple drainage holes 3. In this embodiment, there are two drainage holes 3, one connected to a first drainage pipe 4, and the other connected to a second drainage pipe 5. These two drainage pipes are connected to a pump, which pumps water out of the pile 6. The first and second drainage pipes 4, 5 are made of high-density polyethylene (HDPE), a material that is corrosion-resistant, lightweight, flexible, and low-cost, ensuring efficient drainage.

[0034] like Figure 5 and Figure 6 As shown, the clamping system includes a clamp 8, a clamping platform 7, a slide bar 12, a slide rail 13, and a push rod 14. The slide bar 12 is vertically positioned in the center of the clamping platform 7. Multiple slide rails 13 are arranged circumferentially along the bottom surface of the clamping platform 7, with the clamp 8 mounted on each slide rail 13. A push rod 14 extends through the outside of the clamp 8, with the head of the push rod 14 positioned within the clamping space of the clamp 8. The clamp 8 moves along the slide rail 13 toward the center of the clamping platform 7. Once the pile 6 is embedded in the clamp 8, the push rod 14 is pushed, causing the head of the push rod 14 to rest against the outside of the pile 6.

[0035] In this embodiment, the slide bar 12 is rectangular, and two lugs are provided at the top of the slide bar 12. The lugs are against the top of the chute 19 when the vibrator falls, which can effectively prevent the vibration system from rotating when it moves up and down. Figure 6As shown, the center of the slide rod 12 is a square hole for laying the water pipe 1, and the water pipe 1 passes through the square hole. The clamping platform 7 is circular, which can increase the contact area with the pile column. It is made of refined steel and can withstand high-frequency vibration. There are four slide rails 13, which are arranged in a circle at the bottom of the clamping platform 7. There are four clamps 8, which are respectively installed on the four slide rails 13. The clamps 8 are hydraulically driven and can move back and forth. There are four push rods 14, which are respectively installed in the four clamps. The heads of the push rods 14 are equipped with rubber pads to increase friction and protect the surface of the pile column during clamping.

[0036] like Figure 7-9 As shown, the vibration system includes a vibration system housing 15 and a vibrator. The vibration system housing 15 is cylindrical and made of high-strength alloy steel, capable of withstanding high impact energy in a single blow. Multiple vibrators are fixedly mounted within the vibration system housing 15. Each vibrator includes a vibrator housing 16, a dual-axis motor 17, and a cam 18. Two sets of dual-axis motors 17 are arranged within the vibrator housing 16. Each motor shaft of the dual-axis motor 17 passes through the vibrator housing 16. A cam 18 is disposed at the end of each motor shaft and is located outside the vibrator housing 16. The bottom surface of the vibration system housing 15 has multiple slots for the cams 18 to move through, and the cams 18 pass through the slots during rotation.

[0037] like Figure 8 As shown, the bottom of the vibration system housing 15 is provided with eight rectangular slots, corresponding to the eight rows of cams 18 on both sides of the vibration machine. A square hole is provided in the middle of the vibration system housing 15, corresponding to the square hole in the center of the slide rod 12, for laying the water pipe. Figure 4 As shown. Figure 7 and Figure 9 As shown, there are four vibrators, arranged in a circle and welded inside the vibration system housing 15. The vibrator housing 15 is a rectangular parallelepiped made of high-strength alloy steel. The dual-axis motor 17 uses a permanent magnet synchronous dual-axis motor with a dual rotor structure embedded with high-performance permanent magnets. The dual-axis structure effectively increases the power of the vibrator. Each vibrator is equipped with two dual-axis motors 17, connected by screws. There are 16 cams 18, each made of titanium alloy with a surface treated with duplex stainless steel 2205 + HVOF spraying to reduce friction. Each motor shaft has a cam 18, and each vibrator has four cams 18 arranged on both sides of the vibrator housing 16.

[0038] like Figure 7 and Figure 8 As shown, a through hole is opened in the center of the vibration system housing 15, and a slide groove 19 is set above the through hole. The slide rod 12 passes through the through hole and cooperates with the slide groove 19 to move the vibration system up and down and limit the movement range, thereby realizing the sliding connection between the clamping system and the vibration system.

[0039] After the dual-axis motor 17 is activated, it drives the cam 18 to rotate. When the flange of the cam 18 passes through the slot and contacts the upper surface of the clamping system, the vibration system moves upward. When the flange of the cam 18 leaves the upper surface of the clamping system, the vibration system falls. This reciprocating cycle achieves the desired vibration effect. The clamping system clamps the pile 6, and the vibration energy is transmitted to the pile 6 through the clamping system until the pile 6 is driven into the seabed.

[0040] like Figure 1 and Figure 10 As shown, the pile bottom flushing system includes a high-pressure water tank 9, a rotary jet head 10, a water pipe 1, a positioning rod 11 and a roller 22. The top surface of the high-pressure water tank 9 is connected to the water pipe 1. In this embodiment, one end of the water pipe 1 is connected to the top surface of the high-pressure water tank 9 through a wet plug hydraulic joint 20, and the other end (free end) passes through the clamping system and the vibration system and is connected to the mother ship, and water is supplied to the pile bottom flushing system through the water pipe 1. The bottom surface of the high-pressure water tank 9 is connected to the rotary jet head 10, and a plurality of water outlets are arranged at the head of the rotary jet head 10, arranged in a circle. A plurality of positioning rods 11 are set on the outer wall of the high-pressure water tank 9. The installation height of the plurality of positioning rods 11 is the same. One end of each positioning rod 11 is hingedly connected to the outer wall of the high-pressure water tank 9, and the other end is installed with a roller 22. A spring 21 is set below the hinged joint between the positioning rod 11 and the high-pressure water tank 9. The positioning rod 11 is supported by the spring 21, and the roller 22 is pressed against the inner wall of the pile column 6.

[0041] In this embodiment, the high-pressure water tank 9 is a rectangular, layered, pressure-resistant tank. Its exterior is constructed of duplex stainless steel (S32205) to resist seawater corrosion, while its interior is constructed of ultra-high molecular weight polyethylene. A three-cylinder plunger pump (two active and one standby) is driven by a permanent magnet synchronous motor. This pump pressurizes water delivered from the mother ship and ejects it through a jet nozzle 10 to disperse sediment at the bottom of the pile. The jet nozzle 10 is hemispherical, with a water pipe connected to its top. The main body is constructed of alloy steel, and the exterior is coated with a zinc-nickel alloy (Zn-Ni) to withstand high pressure and resist erosion by seawater and sediment.

[0042] In this embodiment, there are four positioning rods 11, which are respectively installed on the four walls of the high-pressure water tank 9. The material of the positioning rod 11 is alloy steel with a zinc-nickel coating sprayed on the outside. One end of the positioning rod 11 is connected to the outer wall of the high-pressure water tank 9 by a hinge, and the other end is equipped with a roller 22. A spring 21 is installed between the high-pressure water tank wall and the positioning rod to support the positioning rod 11 so that the roller 22 is pressed against the inner wall of the pile column 6, so that the pile bottom flushing system remains stable during operation.

[0043] This invention utilizes a novel vibrating pile hammer to effectively reduce noise during piling. A four-claw clamp allows for removable and adjustable openings, making it suitable for piles of various sizes. A bottom flushing system reduces driving resistance and noise pollution.

[0044] The offshore silent wind power pile driver of the present invention is used on a wind power installation ship, and its specific implementation scheme is as follows:

[0045] First, accurately measure and determine the pile position, and set necessary positioning marks. Check whether the pile position meets the design requirements and construction specifications to ensure the accuracy of the pile position.

[0046] like Figure 11 As shown, the pile bottom flushing system is first placed inside the pile 6. The spring 21 on the positioning rod 11 is then released, causing the roller 22 on the positioning rod 11 to press against the inner wall of the pile 6. The clamp 8 is then adjusted to the appropriate size and lowered. Once the pile 6 is inserted into the clamp 8, the push rod 14 is pushed, causing the clamp 8 to clamp the pile 6 tightly, ensuring that vibration energy is efficiently transferred to the pile. The pile 6 and the pile driver are then hoisted together and lowered when the pile reaches the intended driving position.

[0047] like Figure 1 As shown, after pile 6 is driven to a certain depth in the seabed by its own gravity, the pile bottom flushing system is lowered to 0.5 meters above the seabed. High-pressure water tank 9 is opened, water pipe 1 begins to deliver water, and jet nozzle 10 sprays high-pressure water to loosen the sediment inside pile 6. The water then evenly fluidizes the sediment, reducing resistance between the pile and the sediment. If water accumulates, it can be drained through the drain hole at the top of pile 6. If the water is too high, the first and second drain pipes 4 and 5 can be connected to a pump to remove the water from the pile.

[0048] like Figure 12 As shown, the vibration machine is started, and when the flange of the cam 18 contacts the upper surface of the clamping platform 7, the vibration system moves upward; Figure 13 As shown, when the flange of cam 18 leaves the top of clamping platform 7, the vibration system descends. This reciprocating vibration effect is achieved, rapidly driving pile 6 into the seabed. This high-speed vibration pile driving method minimizes noise and makes it easier for the pile to vibrate underground, driving it faster and deeper into the seabed, achieving greater efficiency and quietness, while minimizing the impact on marine life.

[0049] As a result, the present invention facilitates construction, utilizing both vibratory piling and jet grouting technologies for high efficiency and low noise. The clamp is adjustable, accommodating a variety of pile sizes. This effectively addresses the challenges of traditional punch piling, including high seabed resistance, high construction difficulty, long construction cycles, low efficiency, and high costs.

Claims

1. A silent offshore wind power pile driver, characterized by: It comprises a pile column (6), a clamping system is installed on the top of the pile column (6), a vibration system is coaxially arranged above the clamping system, and the clamping system and the vibration system are slidably connected; The vibration system includes a vibration system housing (15), wherein a plurality of vibration machines are fixedly installed inside the vibration system housing (15), each vibration machine includes a vibration machine housing (16) and two sets of double-axis motors (17) installed in the vibration machine housing (16), each motor shaft of the double-axis motor (17) passes through the vibration machine housing (16), and a cam (18) is provided at the end of each motor shaft, and the cam (18) is located outside the vibration machine housing (16); a plurality of slots for the cams (18) to move are provided on the bottom surface of the vibration system housing (15), and the cams (18) pass through the slots during the rotation process; After the dual-axis motor (17) is started, it drives the cam (18) to rotate. When the flange of the cam (18) passes through the slot and contacts the upper surface of the clamping system, the vibration system moves upward; when the flange of the cam (18) leaves the upper surface of the clamping system, the vibration system falls, and this reciprocating process is repeated to achieve a vibration effect. The clamping system clamps the pile (6), and vibration energy is transmitted to the pile (6) through the clamping system until the pile (6) is driven into the seabed.

2. The offshore silent wind power pile driver according to claim 1, characterized in that: The clamping system comprises a clamping platform (7), a plurality of slide rails (13) are arranged circumferentially on the bottom surface of the clamping platform (7), and a clamp (8) is installed on each slide rail (13); a push rod (14) is passed through the outside of the clamp (8), and the head of the push rod (14) is located in the clamping space of the clamp (8); The clamp (8) moves along the slide rail (13) toward the center of the clamping platform (7). After the pile (6) is embedded in the clamp (8), the push rod (14) is pushed so that the head of the push rod (14) is against the outside of the pile (6).

3. The offshore silent wind power pile driver according to claim 2, characterized in that: A slide bar (12) is vertically arranged at the center of the clamping platform (7), a through hole is provided at the center of the vibration system housing (15), a slide groove (19) is arranged above the through hole, and the slide bar (12) passes through the through hole and cooperates with the slide groove (19) to realize the sliding connection between the clamping system and the vibration system.

4. The offshore silent wind power pile driver according to claim 1, characterized in that: A pile bottom flushing system is provided in the pile column (6), and a water pipe (1) is connected to the pile bottom flushing system. The free end of the water pipe (1) passes through the clamping system and the vibration system, and water is supplied to the pile bottom flushing system through the water pipe (1).

5. The offshore silent wind power pile driver according to claim 4, characterized in that: The pile bottom flushing system comprises a high-pressure water tank (9), the top surface of the high-pressure water tank (9) is connected to a water pipe (1), the bottom surface of the high-pressure water tank (9) is connected to a jet nozzle (10), and a plurality of water outlets are arranged at the head of the jet nozzle (10).

6. The silent offshore wind power pile driver according to claim 5, characterized in that: The outer wall of the high-pressure water chamber (9) is provided with a plurality of positioning rods (11), the installation heights of the plurality of positioning rods (11) being the same, one end of each positioning rod (11) being hingedly connected to the outer wall of the high-pressure water chamber (9), and the other end of each positioning rod (11) being provided with a roller (22); A spring (21) is provided below the hinged portion between the positioning rod (11) and the high-pressure water chamber (9), and the positioning rod (11) is supported by the spring (21), thereby pressing the roller (22) against the inner wall of the pile column (6).

7. The offshore silent wind power pile driver according to claim 4, characterized in that: The high-pressure water cabin (9) adopts a layered pressure-resistant cabin, and a three-cylinder plunger pump is used inside. The three-cylinder plunger pump is driven by a permanent magnet synchronous motor.

8. The silent offshore wind power pile driver according to claim 1, characterized in that: A plurality of drainage holes (3) are provided on the top of the pile (6).

9. The offshore silent wind power pile driver according to claim 1, characterized in that: A drainage pipe is installed on the drainage hole (3), and the drainage pipe is connected to a pump, and the water inside the pile column (6) is pumped out by the pump.

10. The silent offshore wind power pile driver according to claim 2, characterized in that: A rubber cushion is provided on the head of the push rod (14).

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