Offshore pile driving device and offshore pile driving barge

Abstract

The offshore pile driving device comprises a pile hammer, a mounting frame, a lifting mechanism and a noise reduction mechanism, a lifting driving mechanism is mounted on the mounting frame and connected to a lifting disc, and the lifting disc is arranged on the outer side of the pile hammer in a sleeving mode; the lifting driving mechanism can drive the lifting disc to slide relative to the mounting frame in the length extending direction of the pile hammer. The noise reduction mechanism comprises a noise reduction cylinder, and the lifting disc can drive the noise reduction cylinder to move in the length extension direction of the pile hammer so as to adjust the depth of the working face, stretching into the noise reduction cylinder, of the pile hammer. The noise reduction cylinder of the noise reduction mechanism accurately covers a piling impact area through flexible lifting, and the noise control requirements under different piling depths are met; meanwhile, the surrounding sleeve structure of the noise reduction cylinder of the noise reduction mechanism directly acts on the periphery of a noise source, and the noise blocking efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of offshore piling, and further to an offshore piling device and an offshore piling vessel. Background Technology

[0002] Offshore piling is a core component of marine engineering construction. However, the high-frequency, high-intensity impact noise generated during construction not only severely disrupts the habitat and physiological behavior of surrounding marine life but may also exceed environmental noise limits along the coast, causing noise pollution. Traditional piling auxiliary equipment generally suffers from shortcomings such as limited noise reduction mechanisms, poor adaptability, and difficulty in achieving noise control under all operating conditions, falling short of the current requirements for "green construction" and "environmentally friendly operations" in the marine engineering field.

[0003] Chinese Patent CN221919397U discloses an offshore wind power piling device, comprising: a piling impact column; a connecting shell slidably connected to the bottom outer side of the piling impact column; an outwardly protruding portion of the piling impact column located inside the connecting shell; cooling structures on both sides of the connecting shell; a noise reduction mechanism axially connected to the bottom of the connecting shell; ventilation holes evenly spaced along the circumference on the bottom surface of the noise reduction mechanism; an elastically connected mounting base structure inside the noise reduction mechanism; the top of a steel pipe pile abutting against the bottom end of the mounting base structure; and magnetic auxiliary structures on the piling impact column and the mounting base structure. The cooling structure is electrically connected to an external power source. Utilizing these structures, this device achieves effective noise reduction while improving the convenience of compaction operations and facilitating installation of an offshore wind power piling device.

[0004] The aforementioned offshore wind power piling devices can only provide noise reduction coverage for steel pipe piles of specific specifications. When dealing with piling operations of different diameters and pile types, they cannot flexibly adjust the enclosure range and the position of the noise reduction mechanism, resulting in noise leakage gaps and limited noise reduction effectiveness under all operating conditions. These offshore wind power piling devices primarily rely on the physical isolation of the noise reduction mechanism and the initial sound attenuation of the ventilation holes, offering limited ability to reduce the high-frequency impact noise generated during piling and making it difficult to control noise within lower environmental limits. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide an offshore piling device and an offshore piling vessel. A lifting mechanism is installed on the outer surface of the piling hammer, which flexibly lifts and lowers to achieve precise coverage of the piling impact area by the noise reduction cylinder of the noise reduction mechanism, adapting to the noise control requirements at different piling depths. At the same time, the enclosing structure of the noise reduction cylinder of the noise reduction mechanism directly acts on the periphery of the noise source, significantly improving the noise blocking efficiency.

[0006] To achieve the above objectives, the present invention provides an offshore piling device, comprising: a piling hammer, a mounting frame, a lifting mechanism, and a noise reduction mechanism. The mounting frame is fixedly installed on the outer surface of the piling hammer. The lifting mechanism includes a lifting plate and a lifting drive mechanism. The lifting drive mechanism is installed on the mounting frame and connected to the lifting plate. The lifting plate is sleeved on the outer side of the piling hammer. The lifting drive mechanism can drive the lifting plate to slide relative to the mounting frame along the length extension direction of the piling hammer. The noise reduction mechanism includes a noise reduction cylinder. The top of the noise reduction cylinder is connected to the lifting plate. The lifting plate can drive the noise reduction cylinder to move along the length extension direction of the piling hammer to adjust the depth to which the working surface of the piling hammer extends into the noise reduction cylinder.

[0007] In some embodiments, the mounting frame includes two guide posts, which are respectively fixedly installed on the outer surface of the pile hammer; the lifting plate has a guide groove corresponding to the two guide posts at a preset position, the two guide posts are correspondingly installed in the two guide grooves, and the lifting plate can slide along the length extension direction of the guide posts;

[0008] The guide post has a receiving groove at a preset position; the lifting drive mechanism includes a threaded rod, a lifting drive motor, and a lifting block. The threaded rod is installed in the receiving groove, the lifting drive motor is installed on the top of the guide post, and the output shaft of the lifting drive motor extends into the receiving groove and is fixedly connected to the top of the threaded rod. The lifting block is fixedly installed in the guide groove of the lifting plate, and the lifting block has a threaded hole at a preset position, and the threaded rod is installed in the threaded hole. When the lifting drive motor is working, it can drive the threaded rod to rotate in the receiving groove, and when the threaded rod rotates, it can drive the lifting block to rise and fall along the receiving groove.

[0009] In some embodiments, the mounting bracket further includes a first sealing cylinder; the first sealing cylinder is sleeved on the outside of the pile hammer and located on top of the two guide columns; the first sealing cylinder also wraps around the outside of the lifting drive motor;

[0010] The lifting plate is conical in shape, with a smaller opening at the top and a larger opening at the bottom.

[0011] In some embodiments, the noise reduction cylinder includes a first ring and a second ring. The first ring is fixedly installed at the bottom of the lifting plate, and the outer side of the first ring has a receiving groove. The second ring is slidably installed in the receiving groove. The top inner wall and the bottom inner wall of the receiving groove are both provided with sliding grooves communicating with the receiving groove. The top side wall and the bottom side wall of the second ring are both provided with sliding protrusions, and the sliding protrusions are slidably installed in the sliding grooves.

[0012] In some embodiments, the noise reduction mechanism further includes a rotation drive mechanism for driving the second ring to slide relative to the first ring. The rotation drive mechanism includes a rotation drive motor, drive teeth, and a rack. The rotation drive motor is fixedly mounted on the outer side of the lifting plate, the drive teeth are mounted on the output shaft of the rotation drive motor, and the rack is fixedly mounted on the outer wall of the second ring, with the drive teeth meshing with the rack. The rotation drive motor drives the drive teeth to rotate, and when the drive teeth rotate, they drive the rack to move, causing the second ring to slide relative to the first ring.

[0013] In some embodiments, the noise reduction mechanism further includes a second sealing cylinder and a protective cylinder. The second sealing cylinder is disposed on the outside of the rotary drive motor. The protective cylinder is disposed at the bottom of the second sealing cylinder. The output shaft of the rotary drive motor extends out of the second sealing cylinder and into the protective cylinder. The drive tooth is installed inside the protective cylinder. A notch is provided on one side of the protective cylinder. The edge of the drive tooth extends out from the notch and meshes with the rack.

[0014] In some embodiments, one end face of the first ring has a locking groove, and one end face of the second ring has a locking protrusion; when the first ring and the second ring are closed together, the end face of the first ring with the locking groove abuts against the end face of the second ring with the locking protrusion, and the locking protrusion is installed into the locking groove.

[0015] In some embodiments, the first ring has a first resonant cavity, and the inner and outer side walls of the first ring are provided with first sound-absorbing holes communicating with the first resonant cavity; the first ring further includes a first sound-absorbing layer installed in the first resonant cavity.

[0016] The second ring has a second resonant cavity, and the inner and outer side walls of the second ring are provided with second sound-absorbing holes that communicate with the second resonant cavity; the second ring further includes a second sound-absorbing layer installed in the second resonant cavity;

[0017] The holes in the first sound-absorbing layer and the second sound-absorbing layer are connected to the first sound-absorbing hole and the second sound-absorbing hole, respectively.

[0018] Both the first and second silencing holes are elongated openings, and their length extension directions are staggered.

[0019] In some embodiments, the outer surfaces of the mounting bracket, the lifting mechanism, and the noise reduction mechanism are all coated with a composite protective coating, which includes a base layer of epoxy zinc-rich primer and a top layer of polyvinyl fluoride topcoat.

[0020] According to another aspect of this application, a marine piling vessel is further provided, including the marine piling apparatus described in any of the preceding claims. Attached Figure Description

[0021] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0022] Figure 1 This is a three-dimensional structural diagram of the marine piling device in a preferred embodiment of the present invention in one state;

[0023] Figure 2 This is a three-dimensional structural diagram of the marine piling device in another state according to a preferred embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the noise reduction mechanism of the marine piling device in the enclosed state according to a preferred embodiment of the present invention;

[0025] Figure 4 This is a three-dimensional structural schematic diagram of the noise reduction mechanism of the marine piling device according to a preferred embodiment of the present invention;

[0026] Figure 5 This is an exploded structural diagram of the noise reduction mechanism of the marine piling device according to a preferred embodiment of the present invention;

[0027] Figure 6 This is a cross-sectional structural diagram of the first and second rings of the noise reduction mechanism of the marine piling device according to a preferred embodiment of the present invention.

[0028] Figure 7 This is an exploded structural diagram of the first and second rings of the noise reduction mechanism of the marine piling device according to a preferred embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of the structure of the marine piling device according to a preferred embodiment of the present invention when the first and second rings are closed.

[0030] Figure 9 This is a schematic diagram of a modified embodiment of the marine piling device of the preferred embodiment of the present invention, when the first and second rings are enclosed.

[0031] Icon labels:

[0032] 100. Offshore piling device; 10. Piling hammer; 20. Mounting frame; 21. Guide column; 210. Receiving groove; 22. First sealing cylinder; 30. Lifting mechanism; 31. Lifting plate; 310. Guide groove; 32. Lifting drive mechanism; 321. Threaded rod; 322. Lifting drive motor; Lifting block; 40. Noise reduction mechanism; 41. Noise reduction cylinder; 411. First retaining ring; 4110. First opening; 4111. Receiving groove; 4112. Sliding groove; 4113. Locking groove ; 4114, First resonant cavity; 4115, First silencing hole; 4116, First sound-absorbing layer; 412, Second circumferential ring; 4120, Second opening; 4121, Sliding protrusion; 4122, Locking protrusion; 4124, Second resonant cavity; 4125, Second silencing hole; 4126, Second sound-absorbing layer; 42, Flared plate; 43, Rotation drive mechanism; 431, Rotation drive motor; 432, Drive gear; 433, Rack; 44, Second sealing cylinder; 45, Protective cylinder. Detailed Implementation

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0034] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0035] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0036] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] refer to Figures 1 to 9 This application provides an offshore piling device 100, which includes a piling hammer 10, a mounting frame 20, a lifting mechanism 30, and a noise reduction mechanism 40. The mounting frame 20 is fixedly installed on the outer surface of the piling hammer 10. The lifting mechanism 30 includes a lifting plate 31 and a lifting drive mechanism 32. The lifting drive mechanism 32 is installed on the mounting frame 20 and connected to the lifting plate 31. The lifting plate 31 is sleeved on the outer side of the piling hammer 10. The lifting drive mechanism 32 can drive the lifting plate 31 to slide relative to the mounting frame 20 along the length extension direction of the piling hammer 10. The noise reduction mechanism 40 includes a noise reduction cylinder 41. The top of the noise reduction cylinder 41 is connected to the lifting plate 31. The lifting plate 31 can drive the noise reduction cylinder 41 to move along the length extension direction of the pile hammer 10, so as to adjust the depth of the working surface of the pile hammer 10 into the noise reduction cylinder 41, so that the noise reduction cylinder 41 surrounds the pile impact periphery at the lower end of the pile hammer 10.

[0039] When the offshore piling device 100 provided in this application starts working, the lifting drive mechanism 32 is activated and drives the lifting plate 31 to rise and fall along the guide column 21 of the mounting frame 20. The lifting plate 31 drives the noise reduction cylinder 41 of the noise reduction mechanism 40 to move up and down along the outer surface of the piling hammer 10 until the noise reduction cylinder 41 is adjusted to the piling impact periphery at the lower end of the piling hammer 10. At this time, the impact noise generated by the piling hammer 10 during piling operation will be effectively contained by the noise reduction cylinder 41 of the noise reduction mechanism 40, reducing the diffusion of noise to the surrounding environment. The marine piling device 100 provided in this application achieves precise coverage of the piling impact area by the noise reduction cylinder 41 of the noise reduction mechanism 40 through the flexible lifting and lowering of the lifting mechanism 30, adapting to the noise control requirements at different piling depths; at the same time, the enclosing structure of the noise reduction cylinder 41 of the noise reduction mechanism 40 directly acts on the periphery of the noise source, significantly improving the noise blocking efficiency, reducing the impact of sound pollution on marine life and the coastal environment, and meeting the requirements of environmentally friendly construction. The stable connection between the mounting frame 20 and the piling hammer 10 ensures the structural stability and reliability during operation.

[0040] refer to Figures 1 to 3 Specifically, the mounting frame 20 includes two guide posts 21, which are respectively fixedly installed on the outer surface of the pile hammer 10. The lifting plate 31 has a preset position with guide grooves 310 corresponding to the two guide posts 21. The two guide posts 21 are correspondingly installed in the two guide grooves 310, and the lifting plate 31 can slide along the length extension direction of the guide posts 21. Through the cooperation of the two guide posts 21 and the two guide grooves 310, the lifting plate 31 can be limited in the circumferential direction of the pile hammer 10, preventing the lifting plate 31 from rotating relative to the pile hammer 10 while sliding along the guide posts 21.

[0041] Preferably, the guide post 21 has a receiving groove 210 at a preset position. The lifting drive mechanism 32 includes a threaded rod 321, a lifting drive motor 322, and a lifting block (not shown in the figure). The threaded rod 321 is installed in the receiving groove 210, the lifting drive motor 322 is installed on the top of the guide post 21, and the output shaft of the lifting drive motor 322 extends into the receiving groove 210 and is fixedly connected to the top of the threaded rod 321. The lifting block is fixedly installed in the guide groove 310 of the lifting plate 31, and the lifting block has a threaded hole at a preset position, in which the threaded rod 321 is installed. When the lifting drive motor 322 is working, it can drive the threaded rod 321 to rotate in the receiving groove 210. When the threaded rod 321 rotates, it can drive the lifting block to rise and fall along the receiving groove 210, thereby driving the lifting plate 31 to move along the length extension direction of the pile hammer 10.

[0042] Preferably, the guide post 21 is a U-shaped frame. There are also two lifting drive mechanisms 32, with each of the two lifting drive mechanisms 32 corresponding to one of the two guide posts 21.

[0043] The mounting bracket 20 further includes a first sealing cylinder 22. The first sealing cylinder 22 is sleeved on the outside of the pile hammer 10 and located on top of the two guide posts 21. The first sealing cylinder 22 also wraps around the outside of the lifting drive motor 322, providing sealing protection for the lifting drive motor 322.

[0044] Preferably, the lifting plate 31 is conical in shape, with a smaller opening at the top to facilitate sliding connection with the pile hammer 10, which has a smaller diameter; and a larger opening at the bottom to facilitate connection with the noise reduction cylinder 41, which has a larger diameter. It should be noted that the top of the lifting plate 31 refers to the end of the lifting plate 31 furthest from the noise reduction cylinder 41, and the bottom of the lifting plate 31 refers to the end of the lifting plate 31 closest to the noise reduction cylinder 41.

[0045] refer to Figure 4 , Figure 5 , Figure 6 as well as Figure 7Furthermore, the noise reduction cylinder 41 includes a first ring 411 and a second ring 412. The first ring 411 is fixedly installed on the bottom of the lifting plate 31, and the second ring 412 is slidably installed on the first ring 411. Both the first ring 411 and the second ring 412 are semi-circular arc-shaped structures. The first ring 411 has a first opening 4110, and the second ring 412 has a second opening 4120. Preferably, the central angles of the first ring 411 and the second ring 412 are both greater than 180°, and more preferably 200°. By sliding the second ring 412 relative to the first ring 411, the second ring 412 can block the first opening 4110 of the first ring 411, and the first ring 411 and the second ring 412 are assembled together to form a 360° enclosure.

[0046] refer to Figure 6 The first retaining ring 411 has a receiving groove 4111 on its outer side, and the second retaining ring 412 is slidably installed in the receiving groove 4111. The top and bottom inner walls of the receiving groove 4111 are each provided with a sliding groove 4112 communicating with the receiving groove 4111. The top and bottom side walls of the second retaining ring 412 are each provided with a sliding protrusion 4121, which is slidably installed in the sliding groove 4112. The cooperation between the sliding protrusion 4121 and the sliding groove 4112 allows the second retaining ring 412 to be limited in the radial direction of the pile hammer 10.

[0047] The noise reduction mechanism 40 further includes a flared plate 42 disposed at the bottom of the noise reduction cylinder 41. The flared plate 42 is installed at the end of the noise reduction cylinder 41 away from the lifting plate 31. The shape of the flared plate 42 is also approximately conical, with a smaller diameter at the end connected to the noise reduction cylinder 41 and a larger diameter at the end away from the noise reduction cylinder 41. The flared plate 42 can increase the enclosure range below the noise reduction mechanism 40, and the lifting plate 31, the noise reduction cylinder 41, and the flared plate 42 are generally shaped with a larger top and a smaller bottom, which helps to transmit the noise generated during the operation of the pile hammer 10 to the end of the flared plate 42 away from the noise reduction cylinder 41, that is, it helps to transmit the noise generated during the operation of the pile hammer 10 to the seabed.

[0048] refer to Figure 6 and Figure 7Furthermore, the noise reduction mechanism 40 further includes a rotation drive mechanism 43, which drives the second ring 412 to slide relative to the first ring 411. Specifically, the rotation drive mechanism 43 includes a rotation drive motor 431, a drive gear 432, and a rack 433. The rotation drive motor 431 is fixedly mounted on the outer side of the lifting plate 31, the drive gear 432 is mounted on the output shaft of the rotation drive motor 431, and the rack 433 is fixedly mounted on the outer wall of the second ring 412, with the drive gear 432 meshing with the rack 433. When the rotation drive motor 431 operates, it drives the drive gear 432 to rotate. When the drive gear 432 rotates, it drives the rack 433 to move, and the rack 433 drives the second ring 412 to slide relative to the first ring 411.

[0049] refer to Figure 6 The noise reduction mechanism 40 further includes a second sealing cylinder 44 and a protective cylinder 45. The second sealing cylinder 44 covers the outside of the rotary drive motor 431 to provide protection for the rotary drive motor 431. The protective cylinder 45 is disposed at the bottom of the second sealing cylinder 44, and the output shaft of the rotary drive motor 431 extends out of the second sealing cylinder 44 and into the protective cylinder 45. The drive tooth 432 is installed inside the protective cylinder 45. A notch is provided on one side of the protective cylinder 45, and the edge of the drive tooth 432 extends from the notch and meshes with the rack 433.

[0050] refer to Figure 9 In some embodiments, the radius of the second ring 412 is larger than the radius of the first ring 411. When the first ring 411 and the second ring 412 surround each other, the two ends of the second ring 412 overlap with the two ends of the first ring 411.

[0051] refer to Figure 8 In some embodiments, one end face of the first retaining ring 411 has a locking groove 4113, and one end face of the second retaining ring 412 has a locking protrusion 4122. When the first retaining ring 411 and the second retaining ring 412 are closed together, the end face of the first retaining ring 411 with the locking groove 4113 abuts against the end face of the second retaining ring 412 with the locking protrusion 4122, and the locking protrusion 4122 is inserted into the locking groove 4113 to limit the first retaining ring 411 and the second retaining ring 412 in the radial direction.

[0052] The first ring 411 has a first resonant cavity 4114 inside, and the inner and outer side walls of the first ring 411 are provided with first sound-absorbing holes 4115 communicating with the first resonant cavity 4114. The first ring 411 further includes a first sound-absorbing layer 4116 installed in the first resonant cavity 4114.

[0053] The second ring 412 has a second resonant cavity 4124 inside, and the inner and outer side walls of the second ring 412 are provided with second sound-absorbing holes 4125 communicating with the second resonant cavity 4124. The second ring 412 further includes a second sound-absorbing layer 4126 installed in the second resonant cavity 4124.

[0054] Preferably, the first sound-absorbing layer 4116 and the second sound-absorbing layer 4126 are both foam ceramics, and the pores in the foam ceramics are connected to the first sound-absorbing hole 4115 and the second sound-absorbing hole 4125 respectively.

[0055] Preferably, both the first silencing hole 4115 and the second silencing hole 4125 are elongated openings, and their length extension directions are staggered. Preferably, the length extension direction of the first silencing hole 4115 is the same as the axial extension direction of the first retaining ring 411; the length extension direction of the second silencing hole 4125 is perpendicular to the radial direction of the second retaining ring 412.

[0056] During operation, when the lifting mechanism 30 is activated, the lifting drive motor 322 drives the threaded rod 321 to rotate within the receiving groove 210 of the guide column 21, causing the lifting block to move along the receiving groove 210. The lifting block then drives the lifting plate 31 to move, achieving precise up and down lifting. This, in turn, causes the noise reduction mechanism 40 below to move synchronously, ensuring that the noise reduction mechanism 40 can accurately align with the pile impact area at the lower end of the pile hammer 10. The second sealing cylinder 44, fixed to one end of the outer surface of the lifting plate 31, provides sealing protection for the rotation drive motor 431 of the noise reduction mechanism 40, preventing seawater and salt spray from corroding the drive end during offshore operations and ensuring stable transmission to drive the noise reduction mechanism 40 to change its sleeve shape. The protective cylinder 45 provides additional protection for the drive teeth 432, further enhancing the device's corrosion resistance and service life. The lifting mechanism 30 and the receiving groove 210 of the guide column 21 make the lifting action of the lifting plate 31 more stable and the position control more precise, ensuring that the coverage position of the noise reduction mechanism 40 is accurate. At the same time, with the double protection of the second sealing cylinder 44 and the protective cylinder 45, the adaptability and reliability of the device in the harsh marine environment are greatly improved, the maintenance cycle of the equipment is extended, and the operating cost is reduced.

[0057] When the rotation drive motor 431 of the noise reduction mechanism 40 is started, it drives the drive tooth 432 to rotate. The drive tooth 432 meshes with the rack 433 at the upper end of the outer surface of the second ring 412, thereby driving the second ring 412 to slide along the receiving groove 4111 of the first ring 411. Since both the first ring 411 and the second ring 412 are 200° semi-circular designs, the second ring 412 gradually engages with the first ring 411 during the sliding process until the locking protrusion 4122 at one end of the second ring 412 touches and engages with the locking groove 4113 at one end of the first ring 411, thereby stopping the second ring 412 and causing the first ring 411 and the second ring 412 to surround each other and form a 360° full circumferential sleeve.

[0058] The flared plate 42 below the noise reduction cylinder 41 can expand the bottom coverage area and reduce noise leakage from the bottom. Noise generated during piling operations enters the noise reduction cylinder 41 and then enters the first resonant cavity 4114 through the first silencing hole 4115 on the first surrounding ring 411, and the second resonant cavity 4124 through the second silencing hole 4125 on the second surrounding ring 412. It then contacts the first sound-absorbing layer 4116 and the second sound-absorbing layer 4126 respectively. The porous structure of the first sound-absorbing layer 4116 and the second sound-absorbing layer 4126, together with the resonant cavity, significantly weakens the noise energy through a combination of sound wave reflection, frictional dissipation, and resonant silencing, achieving efficient noise reduction.

[0059] The precise transmission of the rotary drive motor 431, the drive gear 432, and the rack 433 ensures the stability and sealing of the splicing of the first retaining ring 411 and the second retaining ring 412. Both the first retaining ring 411 and the second retaining ring 412 adopt a 200° arc structure design, which avoids dead angles during splicing and provides adjustment space for installation and adaptation to different pile diameters. The cooperation between the locking protrusion 4122 and the locking groove 4113 further enhances the overall rigidity of the noise reduction cylinder 41. The composite noise reduction mechanism, combining the first sound-absorbing layer 4116 with the first resonant cavity 4114 and the second sound-absorbing layer 4126 with the second resonant cavity 4124, attenuates high-frequency impact noise more efficiently than single physical isolation. Combined with the bottom protection of the flared plate 42, it significantly reduces the impact of noise on the marine ecosystem and coastal environment.

[0060] Furthermore, the outer surfaces of the mounting bracket 20, the lifting mechanism 30, and the noise reduction mechanism 40 are all coated with a composite protective coating, which includes a base epoxy zinc-rich primer and a top layer of polyvinyl fluoride paint. For example, the outer surfaces of the guide post 21, the lifting plate 31, the first retaining ring 411, the second retaining ring 412, and the flared plate 42 are all coated with a composite protective coating. The composite protective coating includes a base epoxy zinc-rich primer and a top layer of polyvinyl fluoride paint, wherein the dry film thickness of the epoxy zinc-rich primer is 50-80 μm, and the dry film thickness of the polyvinyl fluoride paint is 30-50 μm. The composite protective coating is continuously applied without any gaps in the coating on the inner walls of the receiving groove 4111 of the first retaining ring 411, the second retaining ring 412, and the guide groove 310 of the lifting plate 31.

[0061] During offshore piling operations, the offshore piling equipment is exposed to seawater and salt spray environments for extended periods, making its metal components susceptible to electrochemical corrosion. The supplemented epoxy zinc-rich primer provides cathodic protection, preventing corrosion of the base metal through zinc powder sacrificial anodes. The surface polyvinyl fluoride topcoat offers excellent weather resistance and seawater immersion resistance, effectively isolating seawater and salt spray from direct contact with the primer, forming a "double protective barrier." Calculations show that this composite coating significantly reduces the corrosion rate of the equipment's metal components, effectively extending its service life in marine environments and substantially reducing maintenance frequency and costs.

[0062] When the lifting plate 31 slides along the guide post 21 and the second retaining ring 412 slides along the receiving groove 4111 of the first retaining ring 411, the contact surfaces of the components are prone to wear due to friction, resulting in a decrease in motion accuracy. In the composite protective coating, the high adhesion of the epoxy zinc-rich primer ensures that the coating is tightly bonded to the substrate, while the polyvinyl fluoride topcoat has a low coefficient of friction (coefficient of friction ≤ 0.15) and high hardness (pencil hardness ≥ H), which can reduce the frictional resistance and wear of the sliding contact surfaces. In practical applications, this can significantly reduce wear, avoid lifting and positioning deviations and retaining ring splicing jams caused by component wear, and ensure the long-term reliable realization of the main functions of "precise lifting" and "360° retaining ring".

[0063] The dry film thickness of the composite protective coating (50~80μm for primer + 30~50μm for topcoat) is relatively thin, and the coating is strictly controlled to be applied only to the surface of the component and the inner wall of the tank. This does not alter the splicing gap between the first retaining ring 411 and the second retaining ring 412, nor does it affect the bottom coverage of the flared plate 42 or the ventilation path of the silencer hole. Furthermore, the coating itself contains no volatile harmful substances, will not cause secondary pollution to the marine environment, is fully compatible with the original device's "environmentally friendly" design, and does not add extra weight to the device (coating unit area weight ≤150g / ㎡), thus avoiding any impact on the load and lifting accuracy of the lifting mechanism.

[0064] The working principle of the offshore piling device 100 provided in this application is as follows: During use, the lifting drive motor 322 can be activated to drive the lifting plate 31 connected to it via the lifting block. The lifting plate 31 can slide along the outer surface of the guide column 21 and the outer surface of the piling hammer 10 housing, achieving precise up-and-down lifting. This, in turn, drives the first retaining ring 411 and the second retaining ring 412 below to move synchronously, ensuring that the first retaining ring 411 and the second retaining ring 412 can be accurately aligned with the piling impact area at the lower end of the piling hammer 10. The second sealing cylinder 44 fixed to one end of the outer surface of the lifting plate 31 provides sealing protection for the installed rotating drive motor 431, preventing seawater and salt spray from corroding the drive end during offshore operations. After the first retaining ring 411 and the second retaining ring 412 descend to their respective positions, the rotation drive motor 431 inside the second sealing cylinder 44 can be activated to drive the drive gear 432 on the output shaft to rotate. The drive gear 432 meshes with the rack 433 at the upper end of the outer surface of the second retaining ring 412, thereby driving the second retaining ring 412 to slide along the receiving groove 4111 on the outer surface of the first retaining ring 411. Since both the first ring 411 and the second ring 412 are 200° semi-circular designs, the second ring 412 gradually engages with the first ring 411 during its sliding process, until the locking protrusion 4122 at one end of the second ring 412 touches and fits into the locking groove 4113 at one end of the first ring 411, thus stopping the second ring 412 and forming a 360° circumferential enclosure. At this time, the flared plate 42 on the lower surface of the first ring 411 can expand the bottom coverage area, reduce noise leakage from the bottom, and after the noise generated by the piling operation enters the enclosure, it will enter the internal resonance cavity through the sound-absorbing holes on the first ring 411 and the second ring 412, and come into contact with the corrugated foam ceramic. The porous structure of the foam ceramic and the resonance cavity work together to greatly reduce the noise energy through the composite principle of sound wave reflection, friction dissipation and resonance silencing, thus achieving efficient noise reduction.

[0065] According to another aspect of this application, a marine piling vessel is further provided, including the marine piling device 100 described in the above embodiments.

[0066] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments; any variations or modifications can be made to the implementation of the present invention without departing from these principles.

Claims

1. A marine piling device, characterized in that, include: The system includes a pile driver, a mounting frame, a lifting mechanism, and a noise reduction mechanism. The mounting frame is fixedly installed on the outer surface of the pile driver. The lifting mechanism includes a lifting plate and a lifting drive mechanism. The lifting drive mechanism is installed on the mounting frame and connected to the lifting plate. The lifting plate is sleeved on the outer side of the pile driver. The lifting drive mechanism can drive the lifting plate to slide relative to the mounting frame along the length extension direction of the pile driver. The noise reduction mechanism includes a noise reduction cylinder. The top of the noise reduction cylinder is connected to the lifting plate. The lifting plate can drive the noise reduction cylinder to move along the length extension direction of the pile driver to adjust the depth of the working surface of the pile driver extending into the noise reduction cylinder.

2. The offshore piling device according to claim 1, characterized in that, The mounting frame includes two guide columns, which are respectively fixedly installed on the outer surface of the pile hammer; the lifting plate has a guide groove corresponding to the two guide columns at a preset position, and the two guide columns are installed in the two guide grooves respectively, and the lifting plate can slide along the length extension direction of the guide columns; The guide post has a receiving groove at a preset position; the lifting drive mechanism includes a threaded rod, a lifting drive motor, and a lifting block. The threaded rod is installed in the receiving groove, the lifting drive motor is installed on the top of the guide post, and the output shaft of the lifting drive motor extends into the receiving groove and is fixedly connected to the top of the threaded rod. The lifting block is fixedly installed in the guide groove of the lifting plate, and the lifting block has a threaded hole at a preset position, and the threaded rod is installed in the threaded hole. When the lifting drive motor is working, it can drive the threaded rod to rotate in the receiving groove, and when the threaded rod rotates, it can drive the lifting block to rise and fall along the receiving groove.

3. The offshore piling device according to claim 2, characterized in that, The mounting bracket further includes a first sealing cylinder; the first sealing cylinder is sleeved on the outside of the pile hammer and located on top of the two guide columns; the first sealing cylinder is also wrapped around the outside of the lifting drive motor; The lifting plate is conical in shape, with a smaller opening at the top and a larger opening at the bottom.

4. The offshore piling device according to any one of claims 1 to 3, characterized in that, The noise reduction cylinder includes a first ring and a second ring. The first ring is fixedly installed at the bottom of the lifting plate. The outer side of the first ring has a receiving groove. The second ring is slidably installed in the receiving groove. The top inner wall and the bottom inner wall of the receiving groove are both provided with sliding grooves communicating with the receiving groove. The top side wall and the bottom side wall of the second ring are both provided with sliding protrusions. The sliding protrusions are slidably installed in the sliding grooves.

5. The offshore piling device according to claim 4, characterized in that, The noise reduction mechanism further includes a rotation drive mechanism for driving the second ring to slide relative to the first ring. The rotation drive mechanism includes a rotation drive motor, drive teeth, and a rack. The rotation drive motor is fixedly installed on the outer side of the lifting plate, the drive teeth are installed on the output shaft of the rotation drive motor, and the rack is fixedly installed on the outer wall of the second ring, with the drive teeth meshing with the rack. The rotation drive motor drives the drive teeth to rotate, and when the drive teeth rotate, they drive the rack to move, causing the second ring to slide relative to the first ring.

6. The offshore piling device according to claim 5, characterized in that, The noise reduction mechanism further includes a second sealing cylinder and a protective cylinder. The second sealing cylinder is disposed on the outside of the rotary drive motor. The protective cylinder is disposed at the bottom of the second sealing cylinder. The output shaft of the rotary drive motor extends out of the second sealing cylinder and into the protective cylinder. The drive tooth is installed inside the protective cylinder. A notch is provided on one side of the protective cylinder. The edge of the drive tooth extends out from the notch and meshes with the rack.

7. The offshore piling device according to claim 5, characterized in that, The first ring has a locking groove on one end face, and the second ring has a locking protrusion on one end face. When the first ring and the second ring are closed together, the end face of the first ring with the locking groove abuts against the end face of the second ring with the locking protrusion, and the locking protrusion is installed into the locking groove.

8. The offshore piling device according to claim 5, characterized in that, The first ring has a first resonant cavity, and the inner and outer side walls of the first ring are provided with first sound-absorbing holes communicating with the first resonant cavity; the first ring further includes a first sound-absorbing layer installed in the first resonant cavity; The second ring has a second resonant cavity, and the inner and outer side walls of the second ring are provided with second sound-absorbing holes that communicate with the second resonant cavity; the second ring further includes a second sound-absorbing layer installed in the second resonant cavity; The holes in the first sound-absorbing layer and the second sound-absorbing layer are connected to the first sound-absorbing hole and the second sound-absorbing hole, respectively. Both the first and second silencing holes are elongated openings, and their length extension directions are staggered.

9. The offshore piling device according to claim 1, characterized in that, The outer surfaces of the mounting frame, the lifting mechanism, and the noise reduction mechanism are all coated with a composite protective coating, which includes a base layer of epoxy zinc-rich primer and a top layer of polyvinyl fluoride topcoat.

10. A marine piling vessel, characterized in that, The marine piling device includes any one of claims 1 to 9.

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