A multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy

Abstract

The present invention relates to a multi-stage buffering energy-absorbing anti-collision and corrosion-resistant steel pontoon, comprising: a first-stage buffering-retractable rolling contact module: comprising a folding-belly energy-absorbing base superimposed along the direction of impact, and a rolling component that can have rolling friction with a bridge structure; a second-stage energy-absorbing-sliding contact module: comprising a rubber fender superimposed along the direction of impact, and a sliding component that can have sliding contact with a bridge structure; a third-stage energy-absorbing-corrosion-resistant steel box module: comprising a post-collision anti-sinking submodule and an anti-collision submodule from bottom to top. Compared with the prior art, the present invention can achieve multi-stage protection of bridge structures from floating objects and ship collisions. Under different impact intensities, the device itself can be repaired at multiple levels while effectively protecting the bridge structure. The excellent corrosion resistance of the composite steel plate solves the problem of corrosion protection and maintenance of anti-collision devices in rivers, lakes and seas, and has outstanding engineering value and economic benefits.

Description

Technical Field

[0001] The invention relates to a floating device for preventing floating objects and ships from colliding with bridge structures, and in particular to a multi-stage buffering energy-dissipating anti-collision and corrosion-resistant steel buoy. Background Art

[0002] Engineering measures are taken to reduce the risk of bridge ship collisions. When the ship impact force is close to or far greater than the bearing capacity of the bridge pier, an anti-collision protection system attached to the bridge pier can protect the bridge pier from impact damage and avoid the resulting collapse of the bridge superstructure. In order to meet the requirements of bridge durability, even when the ship impact force is less than the bearing capacity of the bridge pier, anti-ship collision facilities of corresponding scale can be set up to prevent damage that affects the durability of the bridge pier, such as the concrete of the bridge pier being knocked off by the ship.

[0003] Compared with fixed devices, floating devices are more adaptable to situations such as significant water level changes and large tidal ranges, and the project cost is relatively low. Steel has stable mechanical properties and the most mature related technical processes, so steel floating devices have been widely used in recent years, but some problems have also been exposed:

[0004] First, during normal service, the floating device constantly contacts and rubs against the concrete surface of the bridge structure, causing defects such as peeling of the surface concrete and exposed steel bars.

[0005] In terms of post-collision maintenance. When the device is subjected to collisions of varying intensities, maintenance work is cumbersome and time-consuming. Especially for local damage caused by small-intensity collisions, which results in the failure of the device's watertightness, it must be removed from the anti-collision device and overhauled in the factory (or a new unit is remade). After being confirmed by a watertight test and meeting the steel structure anti-corrosion design requirements, it can be installed and fixed. When the device is subjected to a high-intensity collision with a large ship, it causes large-scale damage to the device, and water fills into the box. If there is no effective connection with the bridge structure, the device will sink into the water, causing serious losses.

[0006] Anti-corrosion maintenance. As a steel anti-collision structure, due to the collision of small ships, the low-speed collision of larger ships or other accidental factors, it causes minor local damage. In addition, the humid external environment often causes large-scale shedding of the anti-corrosion paint near the damaged area. Therefore, the anti-corrosion maintenance of the device within the designed service life has become another problem that needs to be solved urgently.

[0007] Chinese patent CN102535329A discloses a cylindrical composite bridge anti-collision device, which is composed of a straight cylindrical and curved cylindrical anti-collision unit assembly. The anti-collision unit is composed of a cylinder and a filling material body inside the cylinder, and a moving device is provided near the bridge structure. The patent has a simple structure, but when facing uncertain impact loads, there are problems such as a single anti-collision defense line and unclear performance classification. Summary of the invention

[0008] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] A multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel pontoon, characterized in that the bridge anti-collision steel pontoon comprises an inner steel box and an outer steel box, the corrosion-resistant steel box module is divided into a post-collision anti-sinking sub-module and an anti-collision sub-module from bottom to top, the inner steel box and the outer steel box of the post-collision anti-sinking sub-module are filled with lightweight polymer materials, and the inner steel box and the outer steel box of the anti-collision sub-module are filled with rubber materials;

[0011] The corrosion-resistant steel box module is provided with a first-stage buffer-retractable rolling contact module and a second-stage energy absorption-sliding contact module on the side close to the bridge structure. The first-stage buffer-retractable rolling contact module includes a folded-belly energy absorption base which is sequentially stacked and arranged along the impact direction, and a rolling component which can generate rolling friction with the bridge structure; the second-stage energy absorption-sliding contact module includes a rubber fender which is sequentially stacked and arranged along the impact direction, and a sliding component which can generate sliding contact with the bridge structure;

[0012] The rolling component in the first-stage buffer-retractable rolling contact module that can generate rolling friction with the bridge structure extends a certain distance along the impact direction than the sliding component in the second-stage energy absorption-sliding contact module that can come into contact with the bridge structure, that is, the distance between the rolling component and the bridge structure is smaller than the distance between the sliding component and the bridge structure.

[0013] Furthermore, the above distance depends on the overall deformation capacity of the device, and is generally preferably 2 to 10 cm.

[0014] Preferably, the first-stage buffer-retractable rolling contact module and the second-stage energy absorption-sliding contact module are connected to the third-stage energy dissipation-corrosion-resistant steel box module by high-strength bolts.

[0015] More preferably, the first-stage buffer-retractable rolling contact module and the second-stage energy absorption-sliding contact module are connected to the third-stage energy dissipation-corrosion-resistant steel box module through a pad. Specifically, the folding-belly energy absorption base is welded with a pad, the pad and the outer steel box are provided with matching bolt holes, the rubber fender is also provided with bolt holes matching the pad, the pad is connected to the outer steel box through high-strength bolts, and the rubber fender is connected to the pad and the outer steel box through high-strength bolts.

[0016] More preferably, the yield force and deformation capacity of the folding-belly energy-absorbing base can be designed according to requirements.

[0017] More preferably, the overall stiffness of the first-stage buffer-retractable rolling contact module and the second-stage energy absorption-sliding contact module is lower than that of the third-stage energy dissipation-corrosion-resistant steel box module.

[0018] More preferably, the inner steel box and the outer steel box in the energy-absorbing and corrosion-resistant steel box module are made of composite metal steel plates, and the composite steel plates can be titanium-steel rolled composite plates, or titanium-steel explosion composite plates or explosion-rolled composite plates.

[0019] More preferably, in the post-collision anti-sinking submodule, longitudinal stiffening ribs are welded inside the outer steel box and / or inside the inner steel box.

[0020] Further preferably, in the post-collision anti-sinking submodule, a lightweight polymer material is filled between the inner steel box and the outer steel box, and the lightweight polymer material may be molded polystyrene foam (EPS), or rigid polyurethane foam (PUR), or polyethylene foam (PE) or other lightweight polymer materials.

[0021] Further preferably, in the anti-collision sub-module, a rubber material is filled between the inner steel box and the outer steel box, and the rubber material may be a rubber ring, rubber particles, a rubber tire or other rubber material with good buffering and energy absorption effect.

[0022] More preferably, the folding belly energy absorbing base is a corrugated cylinder with a circular cross-section, or a corrugated cylinder with a square cross-section, or a corrugated cylinder with an arbitrary polygonal cross-section, and the material is preferably soft steel or steel with outstanding deformation ability.

[0023] More preferably, the rubber fender may be cylindrical (CY), semicircular (D), super arch (SA), super drum (SC) or other rubber structures with good buffering and energy absorption effects.

[0024] More preferably, the rolling component in the first-stage buffer-retractable rolling contact module that can generate rolling friction with the bridge structure can be a metal roller or a nylon roller;

[0025] The sliding component in the second-stage energy absorption-sliding contact module that can come into contact with the bridge structure can be a polytetrafluoroethylene sliding plate, or other plates with a small friction coefficient and good wear resistance.

[0026] More preferably, a transverse stiffening plate is provided between the inner steel box and the outer steel box in the energy dissipation-corrosion resistant steel box module.

[0027] More preferably, the multi-stage buffering energy-absorbing anti-collision and corrosion-resistant steel buoy consists of a plurality of anti-collision segments, the inner steel boxes of adjacent anti-collision segments are connected by flanges, and the outer steel boxes are connected by connecting straps.

[0028] In the present invention, the third-stage energy-consuming body is a steel buoyancy box, and may also be a steel buoy or the like.

[0029] Under normal operation conditions of bridge structures, multi-level buffer energy-absorbing anti-collision and corrosion-resistant steel pontoons can adapt well to large tidal ranges and rise and fall continuously with changes in water levels. Especially in marine environments, the rise and fall of steel pontoons during the design reference period accumulates tens of thousands of times. How to ensure good contact between the steel pontoons and the bridge structure and not cause damage to the surface of the structure is an important issue that must be considered for floating anti-collision pontoons in non-collision conditions. Through the reasonable distribution of strength and stiffness between the modules of the steel pontoon, the steel pontoon is placed in a collision with a small ship, a low-speed collision with a larger ship, or due to other accidental factors. The designated module is damaged, which does not affect the normal operation of the steel pontoon. When repairing, only the module at the component level needs to be repaired or replaced. When the steel pontoon is hit by a high-intensity collision with a large ship, each anti-collision module is damaged in turn. When repairing, the anti-collision segment level is repaired or replaced. In addition, as a steel anti-collision structure, the anti-corrosion maintenance issue is very important. How to achieve maintenance-free steel pontoons during normal service or after a slight collision or scratch is worthy of in-depth study.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. Multi-level anti-collision protection, clear module division, easy to establish the performance indicators and performance level division of steel pontoons. Including: first-level buffer-retractable rolling contact module, second-level energy absorption-sliding contact module, third-level energy dissipation-corrosion-resistant steel box module.

[0032] 2. Replaceable, simple to maintain, outstanding engineering value and economic benefits. Minor collision and minor repair: repair or replace the first-level buffer-retractable rolling contact module and the second-level energy absorption-sliding contact module. Major collision and major repair: repair or replace the third-level energy dissipation-corrosion-resistant steel box module.

[0033] 3. Strong self-floating ability and still has the ability to float after severe damage. Combined with engineering experience, different sub-functional area modules are set. Existing hull structure design and typical ship collision accident cases show that the anti-collision device in the water part is the main force-bearing area, followed by the underwater part. The present invention is divided into a post-collision anti-sinking sub-module and an anti-collision sub-module from bottom to top. The post-collision anti-sinking sub-module ensures that the device does not sink when it is damaged and enters the water body. It is equipped with longitudinal stiffening ribs and lightweight polymer materials. While ensuring that the overall device has a strong self-floating ability, it has good buffering and energy dissipation capabilities. The anti-collision sub-module is the main collision area, with built-in rubber materials, strong deformation ability, and significant buffering effect.

[0034] 4. Obvious buffering effect and outstanding energy dissipation capacity. The folding belly energy-absorbing base has strong deformation capacity. Under low-intensity impact, the folding belly energy-absorbing base deforms first, and has a certain buffering and energy dissipation effect. Other modules do not deform or deform slightly. Under medium-intensity impact, the folding belly energy-absorbing base deforms significantly. After exceeding the specified extension distance, it cooperates with the rubber fender to produce a good buffering effect. At this time, the main steel box does not deform or deforms slightly. Under high-intensity impact, after the first and second anti-collision defense lines work in sequence, the main steel box is further deformed. The double-layer steel structure is combined with the built-in rubber material or polymer material, which makes the main energy dissipation capacity of the device outstanding.

[0035] 5. With strong corrosion resistance, the composite steel plate makes the device maintenance-free during normal service or after slight collision or scraping. It solves the problem of large-scale shedding of nearby anti-corrosion paint caused by local slight damage caused by collision of small ships, low-speed collision of larger ships or other accidental factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A typical cross-sectional view of a multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoyancy tank according to the first embodiment of the present invention;

[0037] Figure 2 It is the elevation view of the straight anti-collision segment;

[0038] Figure 3 for Figure 2 Floor plan of

[0039] Figure 4 It is an elevation view of the first-stage buffer-retractable rolling contact module and the second-stage energy absorption-sliding contact module;

[0040] Figure 5 for Figure 4 Floor plan of

[0041] Figure 6 It is a schematic diagram of the structure of a folded-belly energy-absorbing base (cylindrical);

[0042] Figure 7 is the force-displacement curve of the folded-belly energy-absorbing base (cylindrical);

[0043] Figure 8 It is the cross section of the rubber fender structure (SA type);

[0044] Fig. 9 This is the elevation view of the rubber fender structure (SA type);

[0045] Fig.10 This is the connection diagram of the inner steel box flange structure;

[0046] Fig.11 for Fig.10 II sectional view;

[0047] Fig.12 for Fig.10 Floor plan of

[0048] Fig.13 This is a large sample drawing;

[0049] Fig.14 The structural drawing of the connecting plate for the outer steel box;

[0050] Fig.15 for Fig.14 The large-scale drawing of part b;

[0051] Fig.16 for Figure 2 Middle end board structure diagram;

[0052] Fig.17 for Fig.16 Side view of

[0053] Fig.18 This is the structural diagram of the transverse stiffening plate;

[0054] Fig.19 for Fig.18 Side view of

[0055] Fig. 20 It is a plan view of a curved anti-collision segment;

[0056] Fig.21 It is a plan view of a corner transition type anti-collision segment;

[0057] Fig. 22 It is the overall schematic diagram of the anti-collision structure;

[0058] Fig.23 A typical cross-sectional view of a multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoyancy tank according to the second embodiment of the present invention;

[0059] Fig.24 It is an elevation view of the first-stage buffer-retractable rolling contact module and the second-stage energy absorption-sliding contact module of the second embodiment;

[0060] Fig.25 for Fig.24 Floor plan of

[0061] Fig.26 It is a schematic diagram of the structure of a folded-belly energy-absorbing base (square cylinder);

[0062] Fig. 27 It is the overall schematic diagram of the anti-collision structure;

[0063] The numbers in the figure show:

[0064] 1-outer steel box, 2-inner steel box, 3-longitudinal stiffening ribs, 4-lightweight polymer material (polyurethane foam), 5-rubber material (rubber tire), 6-cylindrical folding belly energy absorbing base, 7-rolling assembly, 8-pad, 9-SA type rubber fender, 10-high-strength bolts, 11-sliding assembly (polytetrafluoroethylene plate), 12-cap / pier, 13-transverse stiffening plate, 14-end plate, 15-flange, 16-flange stiffening ribs, 17-connecting strap, 18-rib mouth, 19-bolt hole, 20-end plate wall, 21-D type rubber fender, 22-square cylindrical folding belly energy absorbing base, A-first-level buffer-retractable rolling contact module, B-second-level energy absorption-sliding contact module, C-third-level energy dissipation-corrosion-resistant steel pontoon. DETAILED DESCRIPTION

[0065] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] Embodiment 1

[0067] A multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy, the structure of which is shown in Figures 1 to 14 As shown, it includes several anti-collision segments arranged around the pier or the abutment, and each anti-collision segment includes:

[0068] The first-level buffer - retractable rolling contact module A: includes a pad 8, a cylindrical folding-belly energy-absorbing base 6, and a rolling assembly (metal roller) 7 which are stacked in sequence along the impact direction, wherein the cylindrical folding-belly energy-absorbing base 6 is connected to the pad 8 by welding, bolt holes 19 are provided on the pad 8 and the outer steel box 1, and the pad 8 is connected to the outer steel box 1 by high-strength bolts 10.

[0069] The second-stage energy absorption-sliding contact module B includes SA-type rubber fenders 9 stacked in sequence along the impact direction, the top surface of the SA-type rubber fender 9 is provided with a sliding component (polytetrafluoroethylene plate) 11, the SA-type rubber fender 9 is provided with bolt holes 19 corresponding to the pad 8, and is connected to the outer steel box 1 through high-strength bolts 10.

[0070] The third-level energy-absorbing and corrosion-resistant steel pontoon C: includes an inner steel box and an outer steel box. The steel pontoon is divided into a post-collision anti-sinking sub-module and an anti-collision sub-module at the water level from bottom to top. The inner steel box 2 and the outer steel box 1 of the post-collision anti-sinking sub-module are filled with lightweight polymer materials (polyurethane foam) 4, and the inner steel box 2 and the outer steel box 1 of the anti-collision sub-module are filled with rubber materials (rubber tires) 5.

[0071] In this embodiment, the first-level buffer-retractable rolling contact module extends 2 cm along the impact direction than the second-level energy absorption-sliding contact module, so that when impacted, the abutment / pier first contacts the first-level buffer-retractable rolling contact module, and the first-level buffering is performed in the first-level buffer-retractable rolling contact module.

[0072] like Figure 1 As shown, in the example, below the water level, longitudinal stiffening ribs 3 are arranged inside the outer steel box 1 along a specified distance.

[0073] like Figure 2 ~As shown in Figure 3, in the linear anti-collision segment of the example, the rubber material (rubber tire) 5 is placed vertically along the axial direction of the device into the reserved space on both sides of the outer steel box 1 and the inner steel box 2 through the welded longitudinal stiffening ribs 3 on the uppermost part of the outer steel box 1, and is placed horizontally along the axial direction of the device into the reserved space on the top of the outer steel box 1 and the inner steel box 2.

[0074] like Figure 2 ~As shown in FIG3 , in the example of the linear anti-collision segment, the reserved space on both sides of the outer steel box 1 and the inner steel box 2 and the bottom space are filled with a lightweight polymer material (polyurethane foam) 4.

[0075] Transverse stiffening plates 13 are welded to the outer steel box 1 and the inner steel box 2 along a specified distance.

[0076] like Figure 6 As shown in the example, the radius of the cylindrical folding belly energy absorbing base is 10 cm, the wall thickness is 2 cm, and the height is 20 cm.

[0077] like Figure 7 As shown in the example, when the cylindrical folding belly energy absorbing base is deformed by 20mm, a horizontal force of 2100kN can be generated. Figure 2 As shown in the example, the straight anti-collision segment is provided with two parallel cylindrical folding belly energy absorbing bases along the axial direction. They are in a parallel relationship in mechanics and can provide a horizontal force of 4200kN (2100kN×2).

[0078] like Fig.10 As shown, a flange 15 is provided at the end of the inner steel box 2. In the example, bolt holes 19 and flange stiffening ribs 16 are provided around the flange 15.

[0079] The steel boxes 2 in the segments are connected by flanges 15 and high-strength bolts 10.

[0080] like Fig.14 As shown, the connecting strap 17 is provided with bolt holes corresponding to the reserved bolt holes of the end plate 14 and the outer steel box 1 , and the above three are connected by high-strength bolts 10 .

[0081] like Fig.16As shown, the end plate 14 in the example is provided with ribs 18 corresponding to the longitudinal stiffening ribs 3 on the outer steel box 1. Bolt holes 19 are provided on the end plate wall plate 20, and the end plate 14 is connected to the outer steel box 1 through high-strength bolts 10 and the bolt holes 19 provided at the end of the outer steel box 1.

[0082] like Fig.18 As shown, in the example, the transverse stiffening plate 13 is provided with rib openings 18 corresponding to the longitudinal stiffening ribs 3 on the outer steel box 1 .

[0083] like Fig. 20 As shown, the outer steel box 1 and the inner steel box 2 of the curved anti-collision segment described in the example can be bent at a specified angle to adapt to changes in the geometric dimensions of the bridge structure.

[0084] like Fig.21 As shown, the outer steel box 1 and the inner steel box 2 of the corner transition segment described in the example can be connected along a specified angle to adapt to the change in width of the anti-collision structure.

[0085] like Fig. 22 As shown, the anti-collision steel box in the example can adapt well to the geometric dimensions of the bridge structure, provide different segment widths in different directions, and meet different defense requirements.

[0086] Embodiment 2

[0087] A multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy, the structure of which is shown in Fig.23 As shown, what is different from the first embodiment is that the rubber material (rubber tire) 5 is vertically placed axially into the reserved space on both sides of the outer steel box 1 and the inner steel box 2 through the welded longitudinal stiffening ribs 3 on the uppermost part of the outer steel box 1, and the vertical device is vertically placed axially into the reserved space on both sides of the outer steel box 1 and the inner steel box 2, and the longitudinal stiffening ribs 3 are provided on both the outer steel box 1 and the inner steel box 2.

[0088] Different from the first embodiment, the first-stage buffer-retractable rolling contact module is a square cylindrical folded belly energy absorbing base 22, and the structural diagram is shown in FIG. Fig.24 A D-type rubber fender 21 is provided in the second-stage energy absorption-sliding contact module.

[0089] As shown in the figure, the anti-collision steel box in the example can be well adapted to the geometric dimensions of the bridge structure.

[0090] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy, characterized in that: The anti-collision and corrosion-resistant steel pontoon comprises: a first-stage buffer-retractable rolling contact module: comprising a folding belly energy-absorbing base stacked and arranged in sequence along the impact direction, and a rolling component capable of rolling friction with the bridge structure; The second-stage energy absorption-sliding contact module includes rubber fenders stacked in sequence along the impact direction and a sliding component that can make sliding contact with the bridge structure; The third-level energy dissipation-corrosion-resistant steel box module: including an inner steel box and an outer steel box. The corrosion-resistant steel box module is divided into a post-collision anti-sinking sub-module and an anti-collision sub-module from bottom to top. Lightweight polymer materials are filled between the inner steel box and the outer steel box of the post-collision anti-sinking sub-module, and rubber materials are filled between the inner steel box and the outer steel box of the anti-collision sub-module; The first-stage buffer-retractable rolling contact module and the second-stage energy absorption-sliding contact module are arranged on the side of the third-stage energy dissipation-corrosion-resistant steel box module close to the bridge structure, and the rolling component in the first-stage buffer-retractable rolling contact module that can generate rolling friction with the bridge structure is extended by a certain distance along the impact direction than the sliding component in the second-stage energy absorption-sliding contact module that can contact the bridge structure; The folding belly energy absorbing base is welded with a pad, the pad and the outer steel box are provided with matching bolt holes, the rubber fender is also provided with bolt holes matching the pad, the pad is connected to the outer steel box through high-strength bolts, and the rubber fender is connected to the pad and the outer steel box through high-strength bolts; The overall rigidity of the first-stage buffer-retractable rolling contact module and the second-stage energy absorption-sliding contact module is lower than that of the third-stage energy dissipation-corrosion-resistant steel box module.

2. A multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy according to claim 1, characterized in that: The lightweight polymer material filled between the inner steel box and the outer steel box of the post-collision anti-sinking submodule is molded polystyrene foam plastic, or hard polyurethane foam plastic, or polyethylene foam plastic; The rubber material filled between the inner steel box and the outer steel box of the anti-collision submodule is a rubber ring, rubber particles, a rubber tire or other rubber materials with good buffering and energy absorption effects.

3. The multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy according to claim 1 is characterized in that: The interior of the outer steel box and / or the interior of the inner steel box of the post-collision anti-sinking submodule is welded with longitudinal stiffening ribs.

4. The multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy according to claim 1 is characterized by: The inner steel box and the outer steel box are made of composite steel plates, which are titanium-steel rolled composite plates, titanium-steel explosion composite plates or explosion-rolled composite plates.

5. The multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy according to claim 1 is characterized by: The folding belly type energy absorbing base is a corrugated cylinder with a circular cross section, or a corrugated cylinder with an arbitrary polygonal cross section.

6. The multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy according to claim 1 is characterized by: The multi-stage buffer energy-absorbing anti-collision and corrosion-resistant steel buoy consists of a plurality of anti-collision segments, the inner steel boxes of adjacent anti-collision segments are connected by flanges, and the outer steel boxes are connected by connecting straps.

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