A self-orienting mooring bollard device

Abstract

The present application relates to the technical field of ship mooring and docking device structure, and discloses a self-orienting bollard device, which comprises a bollard, wherein the bollard comprises a bollard cap and a slewing bearing connected with the lower part of the bollard cap; when a mooring rope is fastened to the bollard cap, the slewing bearing can drive the bollard cap to rotate in the horizontal direction. The present application can automatically rotate and align the bollard cap according to the direction of the mooring rope; the double-point force structure can share the tension of the mooring rope, thereby significantly reducing the bending moment at the root, reducing the jamming and eccentric wear phenomenon, and improving the structural safety and service life under high load working conditions.

Description

Technical Field

[0001] This invention relates to the field of ship mooring and mooring equipment technology, and to a self-directional mooring bollard device, specifically a self-directional mooring bollard device with a dual-point force-sharing cable structure. Background Technology

[0002] A floating bollard is a crucial device used for mooring, positioning, and securing vessels in lock chambers or dock areas. This device relies on the buoyancy of the pontoons to rise and fall with water level changes, thus adapting to fluctuations within a certain range. However, in actual operation, as the water level continuously changes, the angle between the mooring line and the bollard shifts, causing alterations in the direction and magnitude of the mooring force exerted by the mooring line on the bollard. These changes in mooring force cause fluctuations in the bending moment borne by the bollard, which can easily lead to structural fatigue damage.

[0003] Existing floating bollards mostly use rigid connections. When the water level fluctuates or the ship's attitude changes, relative friction and impact can easily occur between the cable and the bollard, causing wear on the bollard body, loosening of the connection, or even structural failure. With the increase in the number of ships of 10,000 tons and the significant increase in mooring force, traditional bollards can no longer meet the requirements in terms of load-bearing strength, angle adaptability, and fatigue life. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a self-orienting bollard device that can reduce mooring force transmission and bending moment changes, thereby enhancing structural durability and operational reliability.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention proposes a self-orienting bollard device, comprising a bollard, the bollard including a cap and a slewing bearing connected to the lower part of the cap; when the mooring line is attached to the cap, the slewing bearing can drive the cap to rotate in the horizontal direction, thereby achieving adaptive adjustment of the mooring line direction and avoiding moment concentration at the base of the bollard due to changes in the angle between the mooring line and the bollard.

[0007] Furthermore, the column cap is a column cap with a machined arc-shaped transition surface.

[0008] Furthermore, the range of the horizontal rotation angle α of the slewing bearing driving the column cap is: -30°≤a≤30°.

[0009] Furthermore, the mooring bollard device of the present invention further includes a buoy, a main shaft vertically arranged on the buoy, and a mooring bollard layer connected in series on the main shaft; the mooring bollard layer includes a support plate arranged at the lower part and a cover plate arranged at the upper part, the mounting seat of the mooring bollard is arranged on the support plate, and the slewing bearing is arranged on the cover plate; both the support plate and the cover plate are connected in series on the main shaft.

[0010] Furthermore, the bollard also includes a mounting base, which is disposed between the support plate and the cover plate, and is correspondingly disposed below the slewing bearing.

[0011] Furthermore, the slewing bearing includes an inner ring, a first ball row, a second ball row, and an outer ring arranged sequentially from top to bottom; the outer ring is connected to a cover plate, and the inner ring is connected to a cap; the diameter of the balls in the first ball row is smaller than the diameter of the balls in the second ball row; the first ball row and the second ball row are respectively disposed in two raceways formed between the outer ring and the inner ring, and the two rows of balls are staggered to bear axial load and overturning moment respectively.

[0012] Preferably, the first ball bearing row is mainly used to bear axial loads, while the second ball bearing row is used to bear radial and overturning loads, thereby ensuring the operational stability of the support structure under complex stress conditions.

[0013] A gap is provided between the lower end faces of the inner ring and the outer ring. The lower part of the inner ring has a downward-protruding first protrusion, and the lower part of the outer ring has a radially-protruding second protrusion. The first protrusion is positioned between two adjacent second protrusions, and the second protrusions act as a limiting element. The distance between two adjacent second protrusions is the travel range of the first protrusion, allowing the slewing bearing to rotate the cap ±30° horizontally to achieve adaptive adjustment of the cable direction. Furthermore, the sealing part of the slewing bearing is equipped with a dustproof and waterproof sealing ring to prevent impurities from entering the interior of the slewing bearing.

[0014] Furthermore, the outer ring is fixedly connected to the cover plate by bolts, and the inner ring is connected to the column cap by bolts, so as to achieve overall assembly and form a support structure that can rotate relative to each other.

[0015] Furthermore, there are N layers (N≥2) of the mooring bollards, arranged in parallel at intervals; there are N (N≥2) bollards, configured one-to-one with the mooring bollard layers, thereby adapting to mooring connections at different ship heights.

[0016] Furthermore, the bollard layer also includes vertically arranged ribs, which are connected to the support plate and the cover plate respectively, to enhance the rigidity of the bollard layer.

[0017] Furthermore, the mounting base is welded to the support plate, and the upper cover plate is welded to the upper end of the mounting base. Ribs are symmetrically welded between the support plate and the upper cover plate to enhance the connection strength between the bollard layer and the bollard.

[0018] Furthermore, the bollard device of the present invention also includes a support frame for supporting the bollard layer, one end of which is connected to the main shaft and the other end is connected to the bottom of the support plate.

[0019] Furthermore, the mooring bollard device of the present invention also includes a pontoon cover plate, which is disposed at the upper end of the pontoon; the main shaft is disposed on the pontoon cover plate. The pontoon cover plate not only serves as a sealing plate, but also bears the function of transmitting the buoyancy inside the pontoon and the load on its superstructure.

[0020] Preferably, the mooring bollard layer has three layers, from top to bottom: a first mooring bollard layer, a second mooring bollard layer, and a third mooring bollard layer. The first mooring bollard layer is connected at the top of the main shaft, and the third mooring bollard layer is connected at the bottom of the main shaft. As a preferred embodiment, the third mooring bollard layer may not have a support plate; instead, a pontoon cover plate can be used to replace the support plate for this layer.

[0021] Furthermore, the mooring bollard device of the present invention also includes a second roller group and a third roller group, each with its outer end disposed on the same vertical line; the second roller group and the third roller group are respectively disposed on the upper part and the lower part of the buoy; the second roller group includes a second transverse roller disposed on the upper part and a second vertical roller disposed on the lower part; the third roller group includes a third vertical roller disposed on the upper part and a third transverse roller disposed on the lower part.

[0022] Furthermore, the bollard device of the present invention also includes a first roller group whose outer end center is on the same vertical line as the second roller group and the third roller group, the first roller group being disposed on the top bollard layer; the first roller group includes a first transverse roller disposed at the upper part and a first vertical roller disposed at the lower part.

[0023] Furthermore, there are two sets of the first roller group, the second roller group, and the third roller group, which are respectively set on both sides of the bollard device and arranged symmetrically.

[0024] Furthermore, the bollard devices are installed in rows on the side of the lock wall. The second and third roller sets are matched with guide grooves provided on the side of the lock wall, allowing the second and third roller sets to roll along the guide grooves. Similarly, the first roller set can also roll along the guide grooves, fixing the buoy to the guide grooves on the lock wall. Furthermore, the rolling directions of the first transverse roller and the first vertical roller are perpendicular to each other, forming a roller groove to guide the cable and prevent rope skipping, jamming, or side slippage. Simultaneously, the rolling directions of the second transverse roller and the second vertical roller, and the third transverse roller and the third vertical roller are perpendicular to each other.

[0025] Furthermore, the bollard device of the present invention also includes a cable splitter ring. When the vessels are connected, the main cable is split into two strands at the side of the vessel or at a predetermined distance from the bollard via the cable splitter ring. The two strands are respectively connected to the caps of adjacent bollard devices to form a dual-point force distribution mode. By distributing the mooring force to different bollard devices, the force at a single point is approximately halved.

[0026] Furthermore, the angle between the two cables is 30° to 90° to form a two-point force-bearing mode, thereby achieving tension balance and reducing the eccentricity.

[0027] Furthermore, the two cables are respectively connected to the hanging rings on the left and right sides of the post cap.

[0028] Furthermore, the second vertical roller includes a roller body, a roller shaft, a swing arm, a self-aligning support, a spherical ball bearing, and a base. The base is connected to the pontoon or mooring bollard layer. The roller body is mounted on the roller shaft. The swing arm is a U-shaped arm, with both ends of the roller shaft connected to one side of the U-shaped arm. The spherical ball bearing is connected to both the base and the self-aligning support, and the bottom of the U-shaped arm is connected to the self-aligning support. The spherical ball bearing is rotatably mounted within the self-aligning support. The spherical ball bearing, through its spherical contact surface, allows the swing arm to swing freely within a preset angle range. The self-adjusting second vertical roller, through its unique swing arm and self-aligning support design, allows the roller body to automatically adjust its angle when the pontoon's attitude changes, always maintaining perpendicular contact with the guide rail surface of the guide channel, thus fundamentally avoiding jamming and uneven wear. Furthermore, the second and third vertical rollers are of the same model.

[0029] Compared with the prior art, the present invention provides a self-orienting bollard device, which has the following advantages:

[0030] (1) The post cap of the present invention can automatically rotate and align according to the direction of the cable, which solves the problem of the continuous change of the bending moment of the mooring post due to the continuous change of the mooring angle.

[0031] (2) The bollard device of the present invention achieves self-orientation adjustment of the bollard cap through slewing bearing, so that the direction of the mooring line moves accordingly and the bending moment at the root is reduced; the tension of the mooring line is distributed through the double-point force component structure, thereby significantly reducing the bending moment at the root of the bollard, reducing jamming and uneven wear, improving the structural safety and service life under heavy load conditions, and improving the load-bearing performance and reliability of the bollard device.

[0032] (3) The bollard device of the present invention adopts a bollard cap with an arc transition surface. When the mooring cable pulls the bollard from different directions, it can adjust the direction of the mooring cable. When connecting the ship to the bollard, the main cable on the side of the ship or at a certain distance from the bollard is divided into two strands by the cable splitting ring. The two mooring cables are respectively connected to the hanging rings on the left and right sides of the bollard cap, distributing the mooring force to different bollard devices to reduce the bending moment acting on the bollard. It has the advantage of high angle adaptability and provides safety guarantee for the passage of large ships. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the mooring bollard device in Embodiment 1 of the present invention;

[0034] Figure 2 This is a side view of the bollard device in Embodiment 1 of the present invention.

[0035] Figure 3 This is a schematic diagram of the structure of the first mooring bollard in Embodiment 1 of the present invention;

[0036] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0037] Figure 5 This is an exploded view of the slewing bearing structure in Embodiment 1 of the present invention;

[0038] Figure 6 This is a partial structural schematic diagram of the mooring bollard device and the cable distribution arrangement of the hull in Embodiment 1 of the present invention;

[0039] Figure 7 This is a schematic diagram of the main structure of the second vertical roller in Embodiment 2 of the present invention;

[0040] Figure 8 This is a cross-sectional view of the second vertical roller in Embodiment 2 of the present invention;

[0041] Figure 9 This is a schematic diagram illustrating the self-adjustment principle of the second vertical roller in Embodiment 2 of the present invention after the roller body contacts the guide groove.

[0042] The meanings of the reference numerals in the figure are as follows:

[0043] 1. Float; 2. First mooring bollard; 21. Second mooring bollard; 22. Third mooring bollard; 3. Float cover plate; 4. Support frame; 5. First transverse roller; 6. First vertical roller; 7. Second transverse roller; 8. Second vertical roller; 9. Third vertical roller; 10. Third transverse roller; 11. Cover plate; 12. Support plate; 13. Column cap; 14. Slewing bearing; 15. Mounting seat; 16. Inner ring; 161-First protrusion; 17. First ball bearing row; 18. Second ball bearing row; 19. Outer ring; 191. Second protrusion; 20. Main shaft; 30. Cable distribution ring; 111. Rib plate; 40-Guide groove; 41-Roller body; 42-Roller shaft; 43-Swing arm; 44-Self-aligning support; 45-Spherical ball bearing; 46-Base. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may include different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0047] Example 1

[0048] like Figures 1 to 5 As shown, this example provides a self-orienting bollard device with a dual-point force-sharing cable structure, including: a buoy 1, a main shaft 20 vertically arranged on the buoy 1, and a bollard layer connected to the main shaft 20; the bollard layer includes bollards, a support plate 12 at the lower part, and a cover plate 11 at the upper part; the bollards include a cap 13 and a slewing bearing 14 connected to the lower part of the cap 13; the slewing bearing 14 is arranged on the cover plate 11; the support plate 12 and the cover plate 11 are both connected to the main shaft 20. The bollard layer has three layers, arranged in parallel at intervals; there are three bollards, namely the first bollard 2, the second bollard 21, and the third bollard 22.

[0049] In one specific embodiment of this invention, the mooring bollard device further includes a first transverse roller 5 and a first vertical roller 6 disposed on the top mooring bollard layer, a second transverse roller 7 and a second vertical roller 8 disposed on the upper sidewall of the pontoon 1, and a third vertical roller 9 and a third transverse roller 10 disposed on the lower sidewall of the pontoon 1. There are two of each of the following: first transverse roller 5, first vertical roller 6, second transverse roller 7, second vertical roller 8, third vertical roller 9, and third transverse roller 10, arranged symmetrically relative to the mooring bollard device of this invention. Each roller is fixed by bolts and cooperates with the guide grooves 40 disposed on both sides of the gate wall.

[0050] The above-mentioned components are connected by welding or bolts to form an integral force-bearing system to achieve stable guidance of the pontoon 1 and reliable support of the multi-layer mooring. The water level in the lock changes over time, and the position of the pontoon 1 will rise and fall accordingly. In order to meet the requirements of ultra-large ships, the size of the pontoon 1 is increased accordingly.

[0051] The mooring bollard device of the present invention also includes a pontoon cover plate 4, which is disposed at the upper end of the pontoon 1; the main shaft 20 is disposed on the pontoon cover plate 4. The pontoon cover plate 4 not only serves as a sealing plate, but also bears the function of transmitting the buoyancy inside the pontoon and the load on its superstructure.

[0052] In some embodiments, the pontoon cover plate 4 is used to directly replace the support plate of the third mooring bollard layer.

[0053] Regarding the function of the first transverse roller 5 and the first vertical roller 6, since the mooring frame has a certain length, without these rollers, the mooring frame may tilt within the guide grooves on both sides of the lock wall due to the tension of the mooring cable. This would cause the second vertical roller 8 and the third vertical roller 9 on the mooring frame to be subjected to greater force. Under the intervention of the mooring cable tension, the mooring frame, the second vertical roller 8, and the third vertical roller 9 are prone to uneven wear and jamming. Therefore, the second vertical roller 8 and the third vertical roller 9 are symmetrically arranged on the left and right sides of the mooring frame and are located on the same plane as the first vertical roller 6. In addition, the second transverse roller 7 and the third transverse roller 10 are also located on the same plane.

[0054] Depending on the initial height of the mooring bollards, a suitable mooring bollard can be selected from the first mooring bollard 2, the second mooring bollard 21, and the third mooring bollard 22. The first transverse roller 5 and the first vertical roller 6 roll in perpendicular directions to each other, forming a "roller groove" to limit the position of the mooring line.

[0055] like Figure 3 and Figure 4 As shown, the bollard includes a cap 13, a slewing bearing 14, and a mounting base 15 connected sequentially from top to bottom. When the mooring line is attached to the cap 13, the slewing bearing 14 can drive the cap 13 to rotate in the horizontal direction, thereby achieving adaptive adjustment of the mooring line direction and avoiding moment concentration at the base of the bollard due to changes in the angle between the mooring line and the bollard.

[0056] like Figure 5 As shown, the slewing bearing 14 includes an inner ring 16, a first ball row 17, a second ball row 18, and an outer ring 19 arranged sequentially from top to bottom; the outer ring 19 is connected to the cover plate 11, and the inner ring 16 is connected to the cap 13; the diameter of the balls in the first ball row 17 is smaller than the diameter of the balls in the second ball row 18; the first ball row 17 and the second ball row 18 are respectively arranged in two raceways formed between the outer ring 19 and the inner ring 16, and the two rows of balls are staggered to bear the axial load and overturning moment respectively.

[0057] The first ball bearing row 17 is mainly used to bear axial loads, while the second ball bearing row 18 is used to bear radial and overturning loads, thereby ensuring the operational stability of the support structure under complex stress conditions.

[0058] A gap is provided between the lower end faces of the inner ring 16 and the outer ring 19. The lower part of the inner ring 16 has a downwardly protruding first protrusion 161, and the lower part of the outer ring 19 has a radially protruding second protrusion 191. The first protrusion 161 is positioned between two adjacent second protrusions 191, which act as a limiting element. The distance between two adjacent second protrusions 191 is the travel range of the first protrusion 161, allowing the slewing bearing 14 to allow the bollard 13 to rotate ±30° in the horizontal direction, thus achieving adaptive adjustment of the mooring direction and preventing moment concentration at the base of the bollard due to angle changes. The sealing part of the slewing bearing is equipped with a dustproof and waterproof sealing ring to prevent impurities from entering the interior of the slewing bearing.

[0059] In one specific implementation of this embodiment, the first mooring bollard 2, the second mooring bollard 21, and the third mooring bollard 22 all adopt a double-row ball slewing bearing 14.

[0060] The principle behind using slewing bearing 14 to reduce the bending moment of the mooring bollard is explained here:

[0061] In existing floating bollard structures, the bollard cap 13 and the mounting base 15 are typically rigidly fixed. When the water level changes and the mooring line is tightened, a horizontal force Fh is generated by the mooring line. This force acts on the top of the bollard cap 13 and is transmitted to the base of the bollard through the bollard body. Due to the fixed constraint at the lower end of the bollard body, the bending moment M = Fh × L formed by the horizontal force within the bollard height L acts on the bollard, causing stress concentration and periodic bending at the base of the bollard body, leading to fatigue failure of the bollard structure. This invention provides a slewing bearing 14 between the bollard cap 13 and the mounting base 15. The slewing bearing 14 allows the bollard cap 13 to rotate relative to the mounting base 15 when the direction of the mooring line force changes, thereby achieving adaptive adjustment of the mooring line direction. Under the action of the horizontal force Fh generated by the mooring line, the bollard cap 13 directly transmits this force to the mounting base 15 through the tangential reaction force of the ball bearing raceway of the slewing bearing 14. In other words, the slewing bearing 14, through the second ball bearing row 18, undertakes the "torque conversion" function.

[0062] In addition, such as Figure 6 As shown, during operation, the bollard devices of this invention are arranged in rows along the side of the lock wall. When a ship berths, its main cable is split into two strands at a certain distance from the bollard via a branching ring 30, and each strand is connected to the cap 13 of the adjacent bollard device. The two strands form a branching angle of 30° to 90°, which distributes the mooring force among the adjacent bollard devices, thereby effectively reducing the force on a single bollard device, reducing the force at a single point by about half.

[0063] Example 2

[0064] The difference between this embodiment and Embodiment 1 is that this embodiment further discloses the specific structure and working principle of the second vertical roller 8 and the third vertical roller 9, as follows:

[0065] like Figures 7 to 9 As shown, the second vertical roller 8 / third vertical roller 9 includes a roller body 41, a roller shaft 42, a swing arm 43, a self-aligning support 44, a spherical ball bearing 45, and a base 46; the base 46 is connected to the float 1, the roller body 41 is mounted on the roller shaft 42, the swing arm 43 is a U-shaped arm, the two ends of the roller shaft 42 are respectively connected to one side of the U-shaped arm, the spherical ball bearing 45 is respectively connected to the base 46 and the self-aligning support 44, and the bottom of the U-shaped arm is connected to the self-aligning support 46. 4. Connection; The spherical ball bearing 45 is rotatably mounted in the self-aligning support 44, allowing the swing arm 43 and its roller body 41 to self-adjust within a certain angle range around the center of the ball. The deflection angle is β, and the preferred angle range is -3°≤β≤3°. That is, the swing arm 43 swings within ±3° to achieve self-adjusting angle compensation, so as to maintain perpendicular contact with the guide rail surface of the lock guide groove 40 when the attitude of the float 1 changes due to waves or off-center load, and avoid off-center wear and jamming.

[0066] Its working principle is as follows: When the buoy 1 tilts due to wave impact or asymmetrical mooring force, the fixed guide groove 40 exerts a non-perpendicular force on the roller body 41. At this time, a conventional fixed roller would jam or wear unevenly due to edge contact. However, in the structure of this invention, this non-perpendicular force drives the roller body 41, transmitting torque to the swing arm 43 through the roller shaft 42, thereby forcing the spherical ball bearing 45 to rotate slightly within the self-aligning support 44. This process automatically adjusts the angle of the roller body 41, ensuring that its working surface remains dynamically perpendicular to the guide rail surface of the guide groove 40. This "follow-up self-aligning" capability ensures a smooth and jam-free guiding process, significantly reducing wear and running resistance.

[0067] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-orienting bollard device, characterized in that: The system includes a bollard, which comprises a bollard cap and a slewing bearing connected to the lower part of the bollard cap; when the mooring line is attached to the bollard cap, the slewing bearing can drive the bollard cap to rotate in the horizontal direction. The range of the horizontal rotation angle α of the slewing bearing driving the column cap is: -30°≤a≤30°; It also includes pontoons, a main shaft vertically mounted on the pontoons, and a bollard layer mounted on the main shaft; the bollard layer further includes a support plate at the bottom and a cover plate at the top, with the slewing bearing mounted on the cover plate; both the support plate and the cover plate are mounted on the main shaft. The slewing bearing includes an inner ring, a first ball row, a second ball row, and an outer ring arranged sequentially from top to bottom; the outer ring is connected to a cover plate, and the inner ring is connected to a column cap; the diameter of the balls in the first ball row is smaller than the diameter of the balls in the second ball row; the first ball row and the second ball row are respectively disposed in two raceways formed between the outer ring and the inner ring, and the two rows of balls are staggered. The mooring bollard layer has N layers, which are arranged in parallel at intervals; the mooring bollard has N bollards, which are configured one-to-one with the mooring bollard layer. It also includes a second roller group and a third roller group, each with its outer ends arranged on the same vertical line; the second roller group and the third roller group are respectively arranged on the upper part and the lower part of the pontoon; the second roller group includes a second transverse roller arranged on the upper part and a second vertical roller arranged on the lower part; the third roller group includes a third vertical roller arranged on the upper part and a third transverse roller arranged on the lower part; The bollards are installed in rows on the side of the lock wall. The second and third roller sets are matched with the guide grooves provided on the side of the lock wall. The second and third roller sets can roll along the guide grooves. It also includes a split cable ring. When the ships are connected, the main cable is split into two strands at the side of the ship or at a preset distance from the mooring bollard. The two strands are connected to the caps of the adjacent mooring bollard devices to form a dual-point force-bearing mode. The angle between the two cables is 30° to 90°; The second vertical roller includes a roller body, a roller shaft, a swing arm, a self-aligning support, a spherical ball bearing, and a base. The base is connected to the pontoon or mooring bollard layer. The roller body is mounted on the roller shaft. The swing arm is a U-shaped arm, with both ends of the roller shaft connected to one side of the U-shaped arm. The spherical ball bearing is connected to both the base and the self-aligning support. The bottom of the U-shaped arm is connected to the self-aligning support. The spherical ball bearing is rotatably mounted within the self-aligning support. The spherical ball bearing, through its spherical contact surface, allows the swing arm to swing freely within a preset angle range. A gap is provided between the lower end faces of the inner ring and the outer ring. The lower part of the inner ring is provided with a first protrusion that bulges downward, and the lower part of the outer ring is provided with a second protrusion that bulges radially. The first protrusion is placed between two adjacent second protrusions, and the distance between two adjacent second protrusions is the range of movement of the first protrusion.

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