A rubber fender system for a full circle marine tug

Abstract

The application discloses a full-rotation marine tug rubber fender system and relates to the technical field of ship rubber fenders.The full-rotation marine tug rubber fender system comprises a protection assembly and a rebound assembly, and a plurality of protection assemblies and rebound assemblies are arranged.The W-shaped structure formed by connecting a plurality of bending fenders can make the rubber fender have multiple buffering stages, effectively absorb and disperse the energy generated by the collision of the ship, reduce the impact force on the ship body, and make the buffering performance of the cylindrical structure of the cylindrical fender more uniform in all directions.The multiple buffering elastic cylinders and connecting elastic sheets designed by superposition can increase the number of buffering stages and complexity, and the protection springs can provide additional elastic recovery force for the rubber fender when being compressed by the collision, which can help push the ship away from the ship body of the tugboat after the collision of the ship, reduce the contact time and friction between the ship and the ship body, and reduce the possibility of damage to the ship body.

Description

Technical Field

[0001] This invention relates to the field of marine rubber fender technology, specifically a rubber fender system for a fully azimuth-rotor marine tugboat. Background Technology

[0002] Azimuth-revolving ocean tugs are vessels specifically designed for towing and traction operations in marine environments. A key feature of azimuth-revolving ocean tugs is their use of a 360-degree azimuth propeller, which allows for precise maneuvering within confined spaces. They typically have a robust hull structure capable of withstanding the immense pulling force and wave impact during towing. They are primarily used to assist large vessels in entering and leaving ports, towing vessels at sea, relocating and installing offshore platforms, and rescuing distressed vessels.

[0003] However, in the current technology, the fenders used on ocean tugs are relatively limited in their selection, often using only W-shaped rubber fenders or only tires as fenders. However, azimuth-turning ocean tugs rotate frequently during operation. If a simple rubber fender is used, the collision angle between the two vessels is uncertain when they approach each other, resulting in limited protection. For example, in the case of a side-impact collision, the W-shaped side wings and the single tire cannot be compressed as expected, causing the collision energy to be insufficiently dispersed and absorbed, resulting in a greater impact force on the vessel. Some areas of the ocean tug cannot be adequately protected, increasing the possibility of damage to the vessel.

[0004] Therefore, we propose a fully azimuth-rotor marine tugboat rubber fender system to address the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a rubber fender system for fully azimuth-rotor marine tugboats, in order to solve the problem mentioned in the background art of the single fender structure used in existing marine tugboats, which leads to insufficient protection for the vessel.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rubber fender system for a fully azimuth-rotating marine tugboat, comprising a protective component and a rebound component, wherein multiple protective components and rebound components are provided. The protective component includes a bending fender, which absorbs energy and provides cushioning when a ship collides with a marine tugboat, exerting an elastic thrust between the ship and the marine tugboat. The top of the bending fender has multiple hexagonal grooves. The rebound component includes a cylindrical fender, the top of which has an air cavity. The air cavity contains multiple buffer cartridges, which are stacked to increase the rebound cushioning performance. The inner wall of the air cavity has a buffer inner ring, which supports the stacked buffer cartridges. The buffer inner ring contains multiple protective springs, each of which is covered with a spring protective sleeve made of fiber-reinforced composite material.

[0007] Preferably, the protective assembly further includes multiple support plates, each of which is fixedly installed between the outer surfaces of two adjacent bent fenders on one side, and an mounting plate is fixedly connected to the outer surface of the other side away from the two bent fenders. The support plates and mounting plates are used to achieve the overall connection of the rubber fenders.

[0008] Preferably, each of the support plates has two first through holes at one end, and each of the mounting plates has a first mounting hole at one end. A first fastening chain is movably connected between the plurality of first through holes and the two first mounting holes. The first fastening chain is threaded in a wave pattern, and a first mounting ring is fixedly connected to both ends of the first fastening chain.

[0009] Preferably, each of the support plates has two second through holes at its other end, and each of the mounting plates has a second mounting hole at its other end. A second fastening chain is movably connected between the multiple second through holes and the two second mounting holes. A second mounting ring is fixedly connected to both ends of the second fastening chain. The two first mounting rings and the two second mounting rings are used to fix the tugboat to the side plate.

[0010] Preferably, each of the cylindrical fenders is fixedly connected between the outer surfaces of two adjacent bent fenders, and the multiple cylindrical fenders and the multiple bent fenders form an integral whole.

[0011] Preferably, the multiple buffer cartridges provided inside each cylindrical fender are a set, and a set of connecting springs are fixedly connected between the outer surfaces of the set of buffer cartridges. The two sides of the set of connecting springs are respectively fixedly connected to the inner wall of the cylindrical fender and the outer surface of the inner buffer ring.

[0012] Preferably, a fixing rod is provided at the inner center of the inner buffer ring, and the cross-section of the fixing rod is a regular hexagon.

[0013] Preferably, the plurality of protective springs are evenly distributed on the six outer surfaces of the fixed rod, and the plurality of protective springs are evenly divided into twelve groups. A reinforcing plate is fixedly connected to one end of each group of protective springs, and the plurality of reinforcing plates are fixedly installed on the inner wall of the buffer inner ring.

[0014] Preferably, each of the cylindrical fenders has multiple anti-slip strips fixedly connected to its outer surface, and the anti-slip strips are used to increase the resistance during a ship collision.

[0015] Preferably, the support plate, bending fender, mounting plate, cylindrical fender, anti-slip strip, buffer spring, connecting spring and buffer inner ring are made of the same material, and cracked carbon black particles are added to the rubber material to improve the aging resistance and wear resistance of the rubber. The rubber type is natural rubber, and plasticizers are added to the rubber material to reduce the interaction force between rubber molecular chains and increase the flexibility and mobility of the molecular chains.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. During use, the W-shaped structure formed by connecting multiple bent fenders gives the rubber pad multiple buffering stages, effectively absorbing and dispersing the energy generated by ship collisions in stages, reducing the impact force on the hull. The cylindrical structure of the cylindrical fender can provide relatively uniform buffering performance in all directions. The stacked design of multiple buffer cylinders and connecting springs can increase the number and complexity of buffering. When the protective spring is compressed during a collision, it can provide additional elastic restoring force for the rubber fender, which helps to push the ship away from the hull of the tugboat after a ship collision, reducing the contact time and friction between the ship and the hull, and reducing the possibility of hull damage. In addition, the spring protective sleeve made of fiber reinforced composite material can prevent the protective spring from breaking and deforming under the erosion of seawater, thus solving the problem of poor protective effect caused by the single structure of existing rubber fenders.

[0018] 2. During use, the cylindrical fenders and bent fenders achieve secondary energy absorption. The cylindrical fenders and bent fenders play a buffering role during rebound. In the event of a lateral collision, the rubber fenders are compressed laterally and then rebound to their original position after release, preventing damage to the hull caused by the displacement of the protection point during the collision. The hexagonal grooves opened inside the bent fenders can generate more deformation and displacement when subjected to a collision. The collision energy is absorbed and dissipated through compression and twisting of the grooves, thus protecting the hull structure and equipment.

[0019] 3. During use, adding pyrolysis carbon black particles to conventional rubber materials makes the rubber fenders less prone to damage from impacts and friction, extending their service life. Carbon black has a certain ability to absorb ultraviolet light and has antioxidant properties, which can improve the aging resistance of rubber and slow down the performance degradation caused by factors such as light and oxidation during long-term use, maintaining the stability of the rubber fenders. In addition, by adding plasticizers to the rubber materials, the intermolecular forces of rubber can be reduced, increasing the flexibility and mobility of the molecular chains, thereby lowering the glass transition temperature of the rubber and improving its low-temperature performance. This allows the rubber fenders of azimuth-turning marine tugboats to maintain good elasticity at low temperatures, providing protection for marine tugboats and ships. Attached Figure Description

[0020] Figure 1 This is a first-view perspective perspective view of a rubber fender system for a fully rotating marine tugboat according to the present invention;

[0021] Figure 2 This is a second-view perspective perspective view of a fully azimuth-rotor marine tugboat rubber fender system according to the present invention;

[0022] Figure 3 This is a third-view perspective view of a fully rotating marine tugboat rubber fender system according to the present invention;

[0023] Figure 4 This is a perspective view of the protective components of a rubber fender system for a fully azimuth-rotor marine tugboat according to the present invention.

[0024] Figure 5 This is a perspective view of the spring-loaded component of a rubber fender system for a fully rotating marine tugboat according to the present invention.

[0025] Figure 6 This is a perspective cross-sectional view of the spring-loaded component of a rubber fender system for a fully azimuth-rotor marine tugboat according to the present invention.

[0026] Figure 7 This is a perspective view of the reinforced long plate portion of a rubber fender system for a fully azimuth-rotor marine tugboat according to the present invention;

[0027] Figure 8 This is a perspective view of the protective spring portion of a rubber fender system for a fully rotating marine tugboat according to the present invention.

[0028] Figure 9 This is a perspective cross-sectional view of the cylindrical fender portion of a rubber fender system for a fully azimuth-rotor marine tugboat according to the present invention.

[0029] In the picture:

[0030] 1. Protective components; 101. Support plate; 102. Bending fender; 103. Hexagonal groove; 104. Mounting plate; 105. First perforation; 106. First mounting hole; 107. Second mounting hole; 108. Second perforation; 2. Rebound components; 201. Cylindrical fender; 202. Anti-slip strip; 203. Air cavity; 204. Buffer cartridge; 205. Connecting spring; 206. Buffer inner ring; 207. Fixing rod; 208. Reinforcing long plate; 209. Protective spring; 210. Spring protective sleeve; 3. First fastening chain; 4. First mounting ring; 5. Second fastening chain; 6. Second mounting ring. Detailed Implementation

[0031] 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.

[0032] Example 1: Refer to Figures 1-9As shown, the present invention provides a technical solution: a rubber fender system for a fully azimuth-rotating marine tugboat, comprising a protective component 1 and a rebound component 2, wherein multiple protective components 1 and rebound components 2 are provided. The protective component 1 includes a bending fender 102, which absorbs energy and buffers the impact when a ship collides with a marine tugboat, and provides elastic thrust between the ship and the marine tugboat. The top of the bending fender 102 is provided with multiple hexagonal grooves 103. The rebound component 2 includes a cylindrical fender 201, the top of which is provided with a cylindrical fender 201. An air cavity 203 is provided, and multiple buffer cartridges 204 are arranged inside the air cavity 203. The multiple buffer cartridges 204 are stacked to increase the rebound buffer performance. The inner wall of the air cavity 203 is provided with a buffer inner ring 206, which supports the stacked buffer cartridges 204. Multiple protective springs 209 are arranged inside the buffer inner ring 206. Each protective spring 209 is covered with a spring protective sleeve 210, which is made of fiber reinforced composite material. Each cylinder Each fender 201 is fixedly connected between the outer surfaces of two adjacent bent fenders 102, and the multiple cylindrical fenders 201 and the multiple bent fenders 102 form an integral whole. Multiple buffer cartridges 204 installed inside each cylindrical fender 201 form a set. A set of connecting spring pieces 205 is fixedly connected between the outer surfaces of a set of buffer cartridges 204. The two sides of the set of connecting spring pieces 205 are respectively fixedly connected to the inner wall of the cylindrical fender 201 and the outer surface of the buffer inner ring 206. A fixed... The fixed rod 207 has a hexagonal cross-section. Multiple protective springs 209 are evenly distributed on the six outer surfaces of the fixed rod 207. The multiple protective springs 209 are divided into twelve groups. A reinforcing plate 208 is fixedly connected to one end of each group of protective springs 209. The multiple reinforcing plates 208 are fixedly installed on the inner wall of the buffer inner ring 206. Multiple anti-slip strips 202 are fixedly connected to the outer surface of each cylindrical fender 201. The anti-slip strips 202 are used to increase the resistance during ship collision.

[0033] In this embodiment, during use, multiple bent fenders 102 are connected by a support plate 101 to form a W-shaped whole. The W-shaped structure gives the rubber pad multiple buffering stages. When impacted, the W-shaped flanks first contact and undergo elastic deformation, absorbing some energy. Then, the middle part is further compressed, effectively absorbing and dispersing the energy generated by the ship collision in stages, reducing the impact force on the hull. A cylindrical fender 201 is fixed between two bent fenders 102. The cylindrical structure of the cylindrical fender 201 has relatively uniform buffering performance in all directions. No matter what angle the ship collides from, it can undergo elastic deformation in a relatively consistent manner to absorb the collision energy. By connecting multiple buffer cartridges 204 and connecting spring pieces 205 inside the air cavity 203 into a whole, the superimposed design... This design increases the number and complexity of the buffer layers. By fixing the reinforcing plate 208 and the protective spring 209 to the inner buffer ring 206, it provides additional elastic restoring force to the rubber fender when subjected to collision compression. This helps to push the ship away from the tugboat's hull after a collision, reducing the contact time and friction between the ship and the hull, and lowering the possibility of hull damage. In addition, by tightly wrapping a spring protective sleeve 210 made of fiber-reinforced composite material around the outside of the protective spring 209, it can prevent the protective spring 209 from breaking and deforming under the erosion of seawater. The fiber-reinforced composite material has excellent corrosion resistance and can effectively isolate the spring from external corrosive media such as seawater and air, preventing the spring from rusting and corroding, and extending the service life of the spring. This solves the problem of poor protective effect caused by the single structure of existing rubber fenders.

[0034] Example 2: Figures 1-9As shown, the protective component 1 includes a bent fender 102, which absorbs energy and provides elastic thrust between the ship and the tugboat when the ship collides with it. The top of the bent fender 102 has multiple hexagonal slots 103. The protective component 1 also includes multiple support plates 101, each fixedly installed between the outer surfaces of two adjacent bent fenders 102 on one side. The outer surfaces of the opposite sides of the two bent fenders 102 are fixedly connected to mounting plates 104. The support plates 101 and mounting plates 104 are used to connect the rubber fender as a whole. Each support plate 101 has two first through holes 105 at one end, and each mounting plate 104 has a first mounting hole 106 at one end. The multiple first through holes 105 and two... A first fastening chain 3 is movably connected between each first mounting hole 106. The first fastening chain 3 is threaded in a wave pattern. Both ends of the first fastening chain 3 are fixedly connected to a first mounting ring 4. Two second through holes 108 are opened at the other end of each support plate 101. A second mounting hole 107 is opened at the other end of each mounting plate 104. A second fastening chain 5 is movably connected between the multiple second through holes 108 and the two second mounting holes 107. Both ends of the second fastening chain 5 are fixedly connected to a second mounting ring 6. The two first mounting rings 4 and the two second mounting rings 6 are used to fix to the side plate of the ocean tugboat. Each cylindrical fender 201 is fixedly connected between the outer surfaces of two adjacent bent fenders 102, and the multiple cylindrical fenders 201 and the multiple bent fenders 102 form an integral whole.

[0035] In this embodiment, during use, the first fastening chain 3 is first used to connect the first perforation 105 and the first mounting hole 106 on the same set of rubber fenders in a wavy pattern. Then, the second fastening chain 5 is used in the same manner but in the opposite direction to connect the second perforation 108 and the second mounting hole 107 on the same set of rubber fenders. Two first mounting rings 4 and two second mounting rings 6 are fixed to the tugboat side plate using connecting fasteners. During installation, the first fastening chain 3 and the second fastening chain 5 are taut. When the azimuth-turning ocean tugboat collides with a ship or the shore, the cylindrical fender 201 will... First, it is compressed, at which point the first energy absorption occurs. Then, the energy of the compression is transferred to multiple bent fenders 102, achieving a second energy absorption. The cylindrical fenders 201 and the bent fenders 102 play a buffering and protective role during rebound. In a lateral collision, the rubber fenders are compressed laterally as a whole. After release, they will rebound to their original position, avoiding damage to the hull caused by the displacement of the protection point during the collision. The hexagonal grooves 103 opened inside the bent fenders 102 can generate more deformation and displacement when subjected to a collision. The collision energy is absorbed and dissipated through compression and twisting of the grooves, thus protecting the hull structure and equipment.

[0036] Example 3: Figures 1-9As shown, the support plate 101, the bent fender 102, the mounting plate 104, the cylindrical fender 201, the anti-slip strip 202, the buffer cartridge 204, the connecting spring 205, and the buffer inner ring 206 are all made of the same material. Pyrolysis carbon black particles are added to the rubber material to improve the aging resistance and wear resistance of the rubber. The rubber type is natural rubber. Plasticizers are added to the rubber material to reduce the interaction force between rubber molecular chains and increase the flexibility and mobility of the molecular chains.

[0037] In this embodiment, during use, the number of cylindrical fenders 201 in the same group is one less than the number of bent fenders 102. Multiple groups of rubber fenders are fixedly installed on the side plates of the azimuth-turning ocean tug in a fully enclosed manner, thereby resisting collisions and compression from any direction. The support plate 101, bent fenders 102, mounting plate 104, cylindrical fenders 201, anti-slip strips 202, buffer cartridges 204, connecting springs 205, and buffer inner rings 206 are made of the same rubber material, but their structural shapes and functions are different. Pyrolytic carbon black particles are added to the conventional rubber material. Pyrolytic carbon black particles have a high specific surface area and good reinforcing properties, and can interact with the rubber molecular chains to improve the tensile strength, tear strength, and durability of the rubber. The abrasion resistance and other mechanical properties make rubber fenders less prone to damage from impacts and friction, extending their service life. Carbon black has a certain ability to absorb ultraviolet rays and has an antioxidant effect, which can improve the aging resistance of rubber and slow down the performance decline caused by factors such as light and oxidation during long-term use, maintaining the performance stability of rubber fenders. In addition, the ocean temperature is low, and the seawater temperature is even lower in the cold season. Adding plasticizers to the rubber material of rubber fenders can reduce the intermolecular forces of rubber molecules, increase the flexibility and mobility of molecular chains, thereby lowering the glass transition temperature of rubber and improving its low-temperature performance. This allows the rubber fenders of azimuth-turning marine tugboats to maintain good elasticity at low temperatures, providing protection for marine tugboats and ships.

[0038] The usage and working principle of this device are as follows: First, the first fastening chain 3 connects the first perforation 105 and the first mounting hole 106 on the same set of rubber fenders in a wave-like pattern. Then, the second fastening chain 5 connects the second perforation 108 and the second mounting hole 107 on the same set of rubber fenders in the same manner but in the opposite direction. Two first mounting rings 4 and two second mounting rings 6 are fixed to the tugboat side plate using connecting fasteners. During installation, the first fastening chain 3 and the second fastening chain 5 are taut. When the azimuth-turning ocean tugboat collides with a ship or shore, the cylindrical fender 201 is first compressed, achieving the first energy absorption. Then, the compressed energy is transferred to multiple bent fenders 102, realizing… The cylindrical fender 201 and the bent fender 102 act as a buffer during rebound, absorbing energy in the second stage of energy absorption. In a lateral collision, the rubber fender is laterally compressed and then springs back to its original position. The hexagonal grooves 103 inside the bent fender 102 allow for greater deformation and displacement upon impact, absorbing and dissipating collision energy through compression and torsion. In use, multiple bent fenders 102 are connected by support plates 101 to form a W-shaped structure. This W-shaped structure provides multiple buffering stages for the rubber pad. Upon impact, the W-shaped flanks first contact and undergo elastic deformation, absorbing some energy. Then, the middle section is further compressed, effectively absorbing and dispersing the energy generated by the ship collision in stages. To reduce the impact on the hull, a cylindrical fender 201 is fixed between the two bent fenders 102. The cylindrical structure of the cylindrical fender 201 provides relatively uniform cushioning performance in all directions. Regardless of the angle of impact, it can elastically deform in a relatively consistent manner to absorb collision energy. By connecting multiple buffer cartridges 204 and connecting spring pieces 205 inside the air cavity 203 into a whole, the superimposed design increases the number and complexity of the cushioning during a collision. The reinforcing plate 208 and protective spring 209, fixedly connected by the inner buffer ring 206, provide additional elastic restoring force to the rubber fender when compressed during a collision, which helps to push the ship away from the tugboat's hull after a collision. In addition, through... A spring protective sleeve 210 made of fiber-reinforced composite material is tightly wrapped around the outside of the protective spring 209. The fiber-reinforced composite material has excellent corrosion resistance and can effectively isolate the spring from corrosive media such as seawater and air, preventing the spring from rusting and corroding. In use, the number of cylindrical fenders 201 in the same group is one less than the number of bent fenders 102. Multiple sets of rubber fenders are fixedly installed on the side plate of the azimuth-turning ocean tug in a fully enclosed manner, thereby resisting collisions and compression from any direction. The rubber material used for the support plate 101, bent fender 102, mounting plate 104, cylindrical fender 201, anti-slip strip 202, buffer cartridge 204, connecting spring 205, and buffer inner ring 206 is the same.However, the structural design and function differ. Adding pyrolytic carbon black particles to conventional rubber materials provides a solution. Pyrolytic carbon black particles have a high specific surface area and good reinforcing properties, allowing them to interact with rubber molecular chains and improve the rubber's tensile strength, tear strength, and abrasion resistance. This makes the rubber fenders less prone to damage from impacts and friction, extending their service life. Carbon black also has a certain UV absorption capacity and antioxidant effect, improving the rubber's aging resistance. Furthermore, given the low ocean temperatures, especially in cold seasons, adding plasticizers to the rubber fender materials reduces the intermolecular forces, increasing the flexibility and mobility of the molecular chains. This lowers the rubber's glass transition temperature and improves its low-temperature performance, allowing the rubber fenders of azimuth-turning ocean tugboats to maintain good elasticity even at low temperatures.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rubber fender system for a fully azimuth-rotor marine tugboat, comprising a protective component (1) and a rebound component (2), wherein multiple protective components (1) and rebound components (2) are provided, characterized in that: The protective component (1) includes a bent fender (102), which absorbs energy and provides elastic thrust between the ship and the tugboat when the ship collides with the tugboat. The top of the bent fender (102) is provided with multiple hexagonal slots (103). The rebound assembly (2) includes a cylindrical fender (201), an air cavity (203) is provided at the top of the cylindrical fender (201), a plurality of buffer cartridges (204) are provided inside the air cavity (203), and the multiple buffer cartridges (204) are stacked to increase the rebound buffer performance. The inner wall of the air cavity (203) is provided with a buffer inner ring (206), and the buffer inner ring (206) supports the stacked buffer cartridges (204). A plurality of protective springs (209) are provided inside the buffer inner ring (206), and each of the protective springs (209) is covered with a spring protective sleeve (210), and the spring protective sleeve (210) is made of fiber reinforced composite material. The protective assembly (1) also includes multiple support plates (101), each of which is fixedly installed between the outer surfaces of two adjacent bent fenders (102) on one side, and an mounting plate (104) is fixedly connected to the outer surface of the other side away from the two bent fenders (102). The support plates (101) and the mounting plates (104) are used to achieve the connection of the rubber fender as a whole. Each of the cylindrical fenders (201) is fixedly connected between the outer surfaces of two adjacent bent fenders (102), and the multiple cylindrical fenders (201) and the multiple bent fenders (102) form an integral whole; Each of the cylindrical fenders (201) has multiple buffer cartridges (204) inside it as a set. A set of connecting springs (205) is fixedly connected between the outer surfaces of the set of buffer cartridges (204). The two sides of the set of connecting springs (205) are fixedly connected to the inner wall of the cylindrical fender (201) and the outer surface of the buffer inner ring (206), respectively.

2. The azimuth-revolving marine tugboat rubber fender system according to claim 1, characterized in that: Each of the support plates (101) has two first through holes (105) at one end, and each of the mounting plates (104) has a first mounting hole (106) at one end. A first fastening chain (3) is movably connected between the multiple first through holes (105) and the two first mounting holes (106). The first fastening chain (3) is threaded in a wave-like manner, and a first mounting ring (4) is fixedly connected to both ends of the first fastening chain (3).

3. The azimuth-revolving marine tugboat rubber fender system according to claim 2, characterized in that: Two second through holes (108) are provided at the other end of each of the support plates (101), and a second mounting hole (107) is provided at the other end of each of the mounting plates (104). A second fastening chain (5) is movably connected between the multiple second through holes (108) and the two second mounting holes (107). A second mounting ring (6) is fixedly connected to both ends of the second fastening chain (5). The two first mounting rings (4) and the two second mounting rings (6) are used to fix to the side plate of the ocean tugboat.

4. The azimuth-revolving marine tugboat rubber fender system according to claim 1, characterized in that: A fixing rod (207) is provided at the center of the inner buffer ring (206), and the cross section of the fixing rod (207) is set in a regular hexagon.

5. The azimuth-revolving marine tugboat rubber fender system according to claim 4, characterized in that: Multiple protective springs (209) are evenly arranged on the six outer surfaces of the fixed rod (207). The multiple protective springs (209) are evenly divided into twelve groups. Each group of protective springs (209) has a reinforcing plate (208) fixedly connected to one end. The multiple reinforcing plates (208) are fixedly installed on the inner wall of the buffer inner ring (206).

6. The azimuth-revolving marine tugboat rubber fender system according to claim 5, characterized in that: Each of the cylindrical fenders (201) has multiple anti-slip strips (202) fixedly connected to its outer surface, and the anti-slip strips (202) are used to increase the resistance during ship collisions.

7. The azimuth-revolving marine tugboat rubber fender system according to claim 6, characterized in that: The support plate (101), bending fender (102), mounting plate (104), cylindrical fender (201), anti-slip strip (202), buffer cartridge (204), connecting spring (205) and buffer inner ring (206) are made of the same material. All of them have pyrolysis carbon black particles added to the rubber material to improve the aging resistance and wear resistance of the rubber. The rubber type is natural rubber. Plasticizers are added to the rubber material to reduce the interaction force between rubber molecular chains and increase the flexibility and mobility of the molecular chains.

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