Offshore platform and its boarding ladder

Abstract

The present invention provides an offshore platform and a boarding ladder thereof. The boarding ladder includes a fixed ladder and a tilting ladder. The fixed ladder includes a fixed frame and an upper inclined ladder; the fixed frame has a storage space; the upper inclined ladder is located in the storage space of the fixed frame and is arranged upwardly and tilted along the length direction of the fixed frame; the tilting ladder includes a tilting frame, a mooring pile and a boarding step. The tilting frame has a first side and a second side, the first side extends along the length direction of the fixed frame, and the first side is rotatably connected to the outer side of the bottom of the fixed frame, so that the second side can be flipped to the inner side of the first side to unfold the tilting ladder; the mooring pile is arranged on the tilting frame and protrudes out of the tilting frame; the boarding step is located in the storage space of the tilting frame and is arranged tilted along the extension direction of the first side; when the tilting frame is unfolded, the boarding step is connected to the upper inclined ladder, allowing personnel to enter the boarding step from the first side and reach the upper inclined ladder, and then board the offshore platform.

Description

Technical Field

[0001] The invention relates to the field of marine platforms, and in particular to a marine platform and a boarding ladder thereof. Background Art

[0002] At present, the demand for marine aquaculture and marine sightseeing tourism has increased greatly, and the related marine ranch care and tourism facilities have increased significantly. Among them, tourists board the marine ranch platform through a boarding device. Commonly used boarding methods are generally divided into the following types: helicopter boarding, cage boarding, and boarding ladder boarding. The helicopter boarding method has limited boarding personnel, complex design, and high construction and boarding costs. The design of the cage boarding method mainly considers the boarding of professionals, not the boarding of non-professionals, and has low applicability; the boarding ladder boarding method is simple and reliable, and has a wide range of applications.

[0003] Traditional marine ranches do not require long-term resident personnel, and only staff such as feeders board the ranches. Therefore, the boarding ladder is designed to be simple. When boarding the boarding device from the ship, the boarding device and the ship are swaying with the waves, making the boarding safety poor. It cannot meet the requirements of marine platforms that need to take into account tourism, sightseeing and leisure functions. Summary of the invention

[0004] The object of the present invention is to provide a boarding ladder with higher boarding safety and an offshore platform having the boarding ladder, so as to solve the problems in the prior art.

[0005] In order to solve the above technical problems, the present invention provides a boarding ladder for an offshore platform, comprising a fixed ladder and a flip ladder that can rotate relative to the fixed ladder;

[0006] The fixed ladder comprises:

[0007] A fixing frame, used for fixed connection with the outer side of the offshore platform; the fixing frame has a containing space;

[0008] An upper inclined ladder is located in the accommodation space of the fixing frame and is arranged to be inclined upward along the length direction of the fixing frame;

[0009] The invertible ladder comprises:

[0010] A flip frame having a storage space therein; the flip frame having a first side and a second side arranged on opposite sides, the first side extending along the length direction of the fixed frame, and the first side being rotatably connected to the outer side of the bottom of the fixed frame, so that the second side can be flipped to the inner side of the first side to unfold the flip ladder;

[0011] A mooring bollard, arranged on the turning frame and protruding out of the turning frame, and used for tying a mooring rope;

[0012] A boarding step is located in the accommodating space of the turning frame and is inclined along the extension direction of the first side. When the turning frame is unfolded, the boarding step is connected to the upper inclined ladder, allowing personnel to enter the boarding step from the direction of the first side and reach the upper inclined ladder to board the offshore platform.

[0013] In one embodiment, the first side of the flip frame is rotatably connected to the fixed frame via a flip member; the flip member includes: a first connecting key, fixed to the bottom of the fixed frame; a first connecting key is provided with a first connecting hole; a second connecting key, fixed to the first side of the flip frame and arranged corresponding to the first connecting key; a second connecting key is provided with a second connecting hole; a connecting shaft is simultaneously passed through the first connecting hole and the second connecting hole to realize the rotational connection between the second connecting key and the first connecting key, thereby realizing the rotational connection between the flip ladder and the fixed ladder.

[0014] In one embodiment, the first connecting key and the second connecting key both include an annular portion and a connecting portion integrally connected to the outer edge of the annular portion; the connecting portion of the first connecting key is fixedly connected to the fixing frame, and the connecting portion of the second connecting key is fixedly connected to the flip frame, the middle of the annular portion of the first connecting key is hollow to form the first connecting hole, and the middle of the annular portion of the second connecting key is hollow to form the second connecting hole.

[0015] In one embodiment, an upper ear plate is provided on the inner side of the fixing frame, and the upper ear plate extends downward beyond the bottom of the fixing frame; a lower ear plate is provided at the second side of the flip frame, and the lower ear plate is arranged corresponding to the upper ear plate, and the lower ear plate is detachably connected to the upper ear plate by fasteners.

[0016] In one embodiment, the upper inclined ladder includes a plurality of inclined ladder pedals arranged in parallel and spaced apart along the length direction of the fixed frame; the boarding steps include a plurality of boarding pedals arranged in parallel and spaced apart along the extension direction of the first side edge; along the extension direction of the first side edge, the size of the boarding pedal is larger than the size of the inclined ladder pedal.

[0017] In one embodiment, the invertible ladder also includes an outer protection component; the outer protection component includes: a plurality of outer railings, which are arranged at intervals along the extension direction of the first side and are located on the side of the boarding step close to the first side; a plurality of connecting chains; each of the chains is arranged between two adjacent outer railings, and the connecting chain is detachably connected to the outer railings.

[0018] In one embodiment, the tilting ladder also includes a lower inclined ladder inclinedly arranged in the accommodating space, and the lower inclined ladder is located on the other side of the boarding step relative to the outer railing; when the tilting frame is unfolded, the lower inclined ladder is located between the upper inclined ladder and the boarding step to connect the upper inclined ladder and the boarding step, and the inclination directions of the lower inclined ladder and the boarding step are opposite.

[0019] In one embodiment, the turnover frame includes a plurality of mooring bollards; the plurality of mooring bollards are arranged at intervals along a height direction of the turnover frame.

[0020] In one embodiment, the mooring piles are provided at both ends of the turnover frame along the extension direction of the first side.

[0021] The present invention further provides an offshore platform, comprising a platform body and the above-mentioned boarding ladder, wherein the fixed ladder of the boarding ladder is fixed to the outer side of the platform body.

[0022] It can be seen from the above technical solution that the advantages and positive effects of the present invention are:

[0023] The boarding ladder of the present invention comprises a fixed ladder and a reversible ladder, and the reversible ladder can be reversed relative to the fixed ladder to realize the folding or unfolding of the reversible ladder. When the reversible ladder is unfolded, the reversible ladder is located below the fixed ladder, and the passing ship is docked near the reversible ladder and directly moored by the mooring pile. Therefore, the passing ship and the boarding ladder are relatively immobile, which reduces the ups and downs of the passing ship with the waves, and further reduces the phenomenon of the passing ship hitting the boarding ladder under the action of the waves, making it safer for personnel to travel between the offshore platform and the passing ship.

[0024] When the flip ladder is folded, it can be located above the sea level, reducing the towing resistance of the offshore platform during navigation and the restriction on the water depth of the channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of one embodiment of the marine platform of the present invention;

[0026] Figure 2 yes Figure 1 Schematic diagram of the unfolding structure of the flip ladder of the offshore platform;

[0027] Figure 3 It is a structural schematic diagram of the fixed ladder and the turning member in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the turning ladder in the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the folding ladder of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the flip ladder in the process of unfolding in the present invention;

[0031] Figure 7 yes Figure 6 A schematic diagram of the structure of the mid-turn ladder being further turned over;

[0032] Figure 8 It is a schematic diagram of the structure for the mooring of ships and offshore platforms.

[0033] The reference numerals are as follows: 1. platform body; 2. boarding ladder; 21. fixed ladder; 211. fixed frame; 212. upper inclined ladder; 213. upper ear plate; 22. flip ladder; 221. flip frame; 222. boarding step; 223. lower inclined ladder; 224. bollard; 225. outer railing; 226. connecting chain; 227. lower ear plate; 23. flip member; 231. first connecting key; 232. second connecting key; 233. connecting shaft;

[0034] 8. Ships coming and going. DETAILED DESCRIPTION

[0035] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0036] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0037] The invention provides an ocean platform which can satisfy both the aquaculture function and the leisure and tourism function.

[0038] See also Figure 1 and Figure 2 The offshore platform comprises a platform body 1 and a boarding ladder 2 arranged outside the platform body 1. The boarding ladder 2 enables personnel to board the platform body 1 safely.

[0039] This embodiment mainly optimizes the boarding ladder 2 and the connection method related thereto, while the relevant structure of the platform body 1 can refer to the relevant technology.

[0040] The boarding ladder 2 includes a fixed ladder 21 and a reversible ladder 22. The reversible ladder 22 can be reversed relative to the fixed ladder 21 to achieve the folding or unfolding of the reversible ladder 22. When the reversible ladder 22 is folded, the towing resistance of the offshore platform during navigation and the limitation on the water depth of the channel are reduced. After the offshore platform reaches the destination, the reversible ladder 22 is unfolded, and the platform body 1 can be boarded through the boarding ladder 2.

[0041] See also Figure 3 The fixed ladder 21 includes a fixed frame 211, an upper inclined ladder 212 and an upper railing. For the convenience of description, the length direction of the fixed frame 211 is defined as the longitudinal direction, and the width direction is defined as the transverse direction.

[0042] The inner side of the fixing frame 211 is fixedly connected to the outer side of the platform body 1, and then serves as the main support point of the entire boarding ladder 2. The inner and outer sides refer to the use state of the offshore platform, and the side facing the inside of the offshore platform is the inner side, and the opposite side is the outer side.

[0043] The fixing frame 211 is frame-shaped and has a storage space inside. Specifically, the fixing frame 211 includes side beams extending in the longitudinal direction, end beams extending in the transverse direction, and vertical beams arranged vertically. There are four side beams, four end beams, and four vertical beams. The two side beams are arranged in parallel and spaced apart, and the two end beams are respectively connected to the ends of the two side beams to form a square top frame. The other two side beams and the two end beams are also connected to form a square bottom frame. The corners of the top frame and the bottom frame are connected by vertical beams to form the fixing frame 211.

[0044] In this embodiment, the side beam of the fixing frame 211 is fixedly connected to the platform body 1. For the convenience of description, the side beam connected to the platform body 1 is defined as the inner beam, and the side beam located outside the inner beam is defined as the outer beam. The two vertical beams located inside are also fixedly connected to the platform body 1.

[0045] Furthermore, the fixing frame 211 further includes two oblique beams. The oblique beams are arranged between the two side beams on the same side to increase the stability of the fixing frame 211. That is, one oblique beam is located between the two inner side beams, and the other oblique beam is located between the two outer side beams. The oblique beam located between the inner side beams is also fixedly connected to the platform body 1.

[0046] In this embodiment, the top of the fixing frame 211 is flush with the deck of the platform body 1 .

[0047] Two upper ear plates 213 are provided at the bottom of the inner side of the fixing frame 211. The two upper ear plates 213 are respectively located at the bottom corners of the inner side of the fixing frame 211. In this embodiment, the upper ear plates 213 are correspondingly arranged at the bottom of the vertical beam located at the inner side. Each upper ear plate 213 protrudes downward from the bottom of the fixing frame 211. An upper mounting hole is provided on the upper ear plate 213, and the axis of the upper mounting hole extends in the horizontal direction.

[0048] The upper inclined ladder 212 is tilted and disposed in the accommodation space of the fixing frame 211. In this embodiment, the upper inclined ladder 212 is close to the outer beam, and the bottom of the upper inclined ladder 212 protrudes downward from the bottom of the fixing frame 211.

[0049] The upper inclined ladder 212 is arranged to be inclined upward along the longitudinal direction, i.e., the length direction of the fixing frame 211, and the top of the upper inclined ladder 212 is flush with the top of the fixing frame 211, so that tourists can easily reach the top of the fixing frame 211 through the upper inclined ladder 212, and then enter the deck of the platform body 1.

[0050] Specifically, the upper inclined ladder 212 includes a plurality of inclined ladder steps arranged in parallel and spaced apart in the longitudinal direction, wherein the length of the inclined ladder steps extends in the transverse direction and the width extends in the longitudinal direction.

[0051] The fixed ladder 21 also includes a top platform, which is plate-shaped, arranged on the top of the fixed frame 211, and connected to the top of the upper inclined ladder 212. The top platform is flush with the deck of the platform body 1, so that passengers can safely board the deck from the upper inclined ladder 212 by using the top platform.

[0052] The upper railing includes side railings arranged on both sides of the upper inclined ladder 212 and a top railing arranged on the top of the fixing frame 211 to protect the safety of tourists during the boarding process.

[0053] See also Figure 4 The invertible ladder 22 includes an invertible frame 221, a mooring pile 224, a boarding step 222, a lower inclined ladder 223, an outer protection component and an inner protection component.

[0054] The flip frame 221 is frame-shaped and has a storage space inside. Specifically, the flip frame 221 includes longitudinal beams extending in the longitudinal direction, transverse beams extending in the transverse direction, and vertical beams arranged vertically. There are six longitudinal beams and transverse beams, and four vertical beams. Two longitudinal beams are arranged in parallel and spaced apart, and two transverse beams are respectively connected to the ends of the two longitudinal beams to form a first square frame. The other two longitudinal beams and two transverse beams are also connected to form a second square frame. Four vertical beams are respectively arranged at the corners of the first frame and the second frame.

[0055] The remaining longitudinal beams and transverse beams are arranged in the same height direction between the first frame and the second frame, and the turning frame 221 is divided into two layers. The two transverse beams are respectively connected between the two vertical beams and are located directly below the transverse beam of the first frame. The two longitudinal beams are respectively an inner longitudinal beam and an intermediate longitudinal beam, the intermediate longitudinal beam is connected to the middle of the length direction of the two transverse beams, and the inner longitudinal beam is connected between the two vertical beams.

[0056] Specifically, the ends of the vertical beam are respectively a first end and a second end, wherein the first end of the vertical beam corresponds to the first frame, and the second end corresponds to the second frame. In this embodiment, the first end of the vertical beam exceeds the first frame in a direction away from the second end. The second end of the vertical beam is flush with the second frame.

[0057] Specifically in this embodiment, the length of the flip frame 221 is consistent with the length of the fixed frame 211 , and the width of the flip frame 221 is consistent with the width of the fixed frame 211 .

[0058] The flip frame 221 has a first side and a second side. The first side and the second side both extend in the longitudinal direction. The first side is rotatably connected to the bottom of the outer side of the fixed frame 211, specifically, the first side is rotatably connected to the outer beam of the bottom frame of the fixed frame 211. When the first side is rotated, the second side can be rotated from the outer side of the first side to the inner side of the first side. In other words, when the first side is rotated, the first end of the flip frame 221 can be rotated from the bottom to the top, so that the state of the flip ladder 22 is flipped from the stowed state to the unfolded state.

[0059] Specifically, when the first side is located outside the second side, the entire flip ladder 22 is located below the fixed frame 211, and the flip ladder 22 is in the deployed state. When the first side is located inside the second side, the flip frame 221 is located outside the fixed frame 211, and the flip ladder 22 is in the retracted state.

[0060] Two lower lug plates 227 are provided on the second side of the first end of the flip frame 221. The two lower lug plates 227 are respectively located at the corners of the first side. In this embodiment, the lower lug plates 227 are respectively arranged at the first end of the vertical beam. Each lower lug plate 227 extends beyond the first end in a direction away from the second end. The lower lug plates 227 are arranged correspondingly to the upper lug plates 213. When the flip frame 221 is flipped to the unfolded state, the upper lug plate 213 is connected to the lower lug plate 227 by inserting a fastener into the upper mounting hole and the lower mounting hole.

[0061] The mooring pile 224 is fixed to the outside of the turning frame 221, and is used to tie the mooring rope, so as to realize the connection between the turning ladder 22 and the passing ship 8. Specifically, the mooring pile 224 is fixed on the vertical beam of the turning frame 221. In this embodiment, the mooring pile 224 protrudes in the longitudinal direction, that is, the length direction of the turning frame 221.

[0062] The connection between the traveling ship 8 and the mooring pile 224 realizes the mooring of the traveling ship 8, thereby realizing the relative immobility between the boarding ladder 2 and the traveling ship 8, reducing the ups and downs of the traveling ship 8 with the waves, and further reducing the phenomenon of the traveling ship 8 colliding with the boarding ladder 2 under the action of the waves, making it relatively safe and convenient for personnel to travel between the offshore platform and the traveling ship 8.

[0063] There are a plurality of mooring piles 224. The plurality of mooring piles 224 are arranged at intervals along the height direction of the turnover frame 221 to meet the connection between the passing ship 8 and the boarding ladder 2 at different sea tide levels.

[0064] Mooring piles 224 are provided at both ends of the longitudinal turning frame 221, that is, mooring piles 224 are provided on the two vertical beams on both sides of the length direction of the turning frame 221, so that the passing ships 8 can select mooring piles 224 at different longitudinal positions according to actual conditions.

[0065] Specifically, the mooring pile 224 includes a pile body and a pile cap. The pile body is connected and fixed to the vertical beam and extends in the longitudinal direction. The pile body protrudes out of the turning frame 221. The pile cap is fixed to the outer end of the pile body, that is, the pile cap protrudes out of the turning frame 221. Specifically, the pile cap extends vertically and is vertically connected to the pile body. The pile body is connected to the middle of the pile cap in the height direction. That is, the mooring pile 224 is in a horizontal T-shape. In this embodiment, the pile body and the pile cap are both square tube structures.

[0066] The boarding step 222 is arranged in the accommodation space of the turnover frame 221. In the accommodation space, the boarding step 222 is arranged to be inclined in the longitudinal direction.

[0067] In this embodiment, the boarding step 222 is close to the first side in the accommodation space. That is, when the turning ladder 22 is unfolded, the boarding step 222 is close to the outside and tilts upward from the bottom. Moreover, the boarding step 222 and the upper inclined ladder 212 have the same tilt direction.

[0068] Specifically, the boarding step 222 includes a plurality of boarding steps arranged in parallel and at intervals in the longitudinal direction. The length of the boarding steps extends in the transverse direction, and the width extends in the longitudinal direction.

[0069] Further, the width of the boarding step is greater than the width of the inclined ladder step. Therefore, when the boarding step 222 is used as a connection hub for personnel to enter the marine platform from other ships or other platforms, the area for personnel to settle is increased, thereby improving boarding safety.

[0070] The lower inclined ladder 223 is located in the accommodation space. In the accommodation space, the boarding step 222 is arranged along the longitudinal inclination.

[0071] In this embodiment, the lower inclined ladder 223 is located near the second side in the accommodation space, specifically between the inner longitudinal beam and the middle longitudinal beam. That is, when the turning ladder 22 is unfolded, the lower inclined ladder 223 is close to the inner side, the lower inclined ladder 223 is inclined in the opposite direction to the boarding step 222, and the lower inclined ladder 223 is located between the boarding step 222 and the upper inclined ladder 212, so that people who enter the boarding step 222 can reach the upper inclined ladder 212 via the lower inclined ladder 223, and then reach the platform body 1.

[0072] Guardrails are provided on both sides of the lower inclined ladder 223 to protect the safety of passengers.

[0073] A first transition platform is also provided between the lower inclined ladder 223 and the boarding step 222, the bottom of the first transition platform is flush with the top of the boarding step 222, and the top of the first transition platform is flush with the bottom of the lower inclined ladder 223. The first transition platform is provided at the crossbeam between the first frame and the second section of the turning frame 221, and is at the same height as the crossbeam.

[0074] A second transition platform is provided between the lower inclined ladder 223 and the upper inclined ladder 212 , the bottom of which is flush with the top of the lower inclined ladder 223 , and the top of which is flush with the bottom of the upper inclined ladder 212 . The second transition platform is located at the first frame of the turning frame 221 .

[0075] The outer protection assembly includes a plurality of outer railings 225 and a plurality of connecting chains 226. The plurality of outer railings 225 are arranged at intervals in the longitudinal direction, and each outer railing 225 is erected on the outer side of the boarding step 222. Each connecting chain 226 is connected between adjacent outer railings 225, and the connecting chain 226 and the outer railing 225 are detachably connected, thereby allowing a person to enter the boarding step 222 from the side.

[0076] Specifically in this embodiment, the outer railing 225 located at the end is composed of two vertical beams on the first side of the flip frame 221.

[0077] A connecting ring is provided on the outer railing 225 , and a lock buckle or a hook is provided at the end of the connecting chain 226 , thereby realizing a detachable connection between the outer railing 225 and the connecting chain 226 .

[0078] Due to different tidal levels, the height positions of the ships 8 on the flip ladder 22 are not the same after they are moored with the flip ladder 22. Therefore, the connecting chain at the corresponding position of the flip ladder 22 can be untied from the outer railing 225, and passengers can board the boarding step 222 through here. Other connecting chains 226 remain connected to the outer railing 225 to prevent passengers from tilting and falling, thereby improving boarding safety.

[0079] The inner protection assembly includes a plurality of inner railings and a plurality of longitudinal railings. The inner railings are arranged on the other side of the boarding step 222 relative to the outer railings 225. The longitudinal railings are arranged parallel to the boarding step 222. The plurality of longitudinal railings are arranged at intervals along the height direction of the inner railings.

[0080] The flip ladder 22 and the fixed ladder 21 are rotatable via the flip member 23. Specifically, the flip member 23 includes a first connecting key 231, a second connecting member and a connecting shaft 233.

[0081] The first connection key 231 is fixed to the bottom of the fixing frame 211. The first connection key 231 includes an annular portion and a connecting portion integrally connected to the outer edge of the annular portion. The connecting portion is rod-shaped and fixedly connected to the bottom of the fixing frame 211. The middle of the annular portion is hollow and forms a first connecting hole. The annular portion extends downward beyond the fixing frame 211.

[0082] The second connection key 232 is fixed to the bottom of the flip frame 221. The second connection key 232 includes an annular portion and a connecting portion integrally connected to the outer edge of the annular portion. The connecting portion is rod-shaped and fixedly connected to the first end of the flip frame 221. The middle of the annular portion is hollow and forms a second connection hole. The annular portion exceeds the first end in a direction away from the second end.

[0083] The connecting shaft 233 is simultaneously inserted into the first connecting hole and the second connecting hole to realize the rotational connection between the second connecting key 232 and the first connecting key 231 , thereby realizing the rotational connection between the flip ladder 22 and the fixed ladder 21 .

[0084] Specifically in this embodiment, the flip member 23 includes two first connection keys 231 and two second connection keys 232, and the first connection keys 231 and the second connection keys 232 are arranged alternately. A connection shaft 233 passes through the first connection keys 231 and the second connection keys 232 at the same time.

[0085] In another embodiment, a first sleeve may be provided at the bottom of the fixed frame 211, and the axis of the first sleeve extends in the longitudinal direction. A second sleeve is provided at the first end of the flip frame 221, and the second sleeve is adapted to the first sleeve. The first sleeve and the second sleeve are placed alternately, and the connecting shaft 233 is inserted into the first sleeve and the second sleeve to realize the rotation of the first sleeve and the second sleeve, thereby realizing the rotation between the flip ladder 22 and the fixed ladder 21.

[0086] In this embodiment, there are two flipping members 23 , corresponding to two bottom corners of the outer side of the fixing frame 211 and two corners of the first side of the flipping frame 221 .

[0087] The method of using the boarding ladder 2 in this embodiment is as follows:

[0088] When the offshore platform is in a towing state, the retractable ladder 22 is in a retracted state, and the retractable ladder 22 is located outside the fixed ladder 21. Figure 5 As shown. At this time, the second side of the invertible ladder 22 is located outside the first side, the first end of the invertible ladder 22 is at the bottom, and the second end is at the top. The invertible ladder 22 is fixed by the tooling on the offshore platform, for example, by tying the invertible ladder 22 to the fixed ladder 21 by ropes. The invertible ladder 22 is folded up so that the invertible ladder 22 is located above the sea level, reducing the towing resistance of the offshore platform during navigation and the limitation on the water depth of the channel.

[0089] After the offshore platform reaches the destination, the reversible ladder 22 is unfolded to provide a boarding passage, so that personnel can reach the platform body 1 from the boarding ladder 2. The ropes binding the fixed ladder 21 and the reversible ladder 22 are untied, and the reversible ladder 22 is slowly turned downward. Figure 6 As shown, until the flip ladder 22 is flipped to be located below the fixed ladder 21, the upper ear plate 213 is connected to the lower ear plate 227, and the unfolding of the flip ladder 22 is completed, as shown in FIG. Figure 7 shown.

[0090] When the overturning ladder 22 is turned downward, the overturning ladder 22 can be slowly released by means of a hand chain hoist on the platform body 1. Other ropes can also be used.

[0091] The method for personnel to board the offshore platform is as follows:

[0092] The ships 8 are docked near the overturning ladder 22. Figure 8 As shown, it is directly moored by the mooring pile 224. At this time, the ship 8 and the boarding ladder 2 are relatively immobile. Untie the connecting chain 226 at the corresponding position with the ship 8 in the height direction, and the boarding personnel enter the boarding step 222 through the outer side.

[0093] The boarding ladder 2 in the present application can actually adjust the height of the tilting ladder 22 and the height of the boarding step 222 according to the hydrological conditions of the sea area where the offshore platform is installed, thereby meeting the boarding requirements.

[0094] Among them, the boarding ladder 2 can also omit the lower inclined ladder 223 according to actual conditions, that is, when the turning ladder 22 is unfolded, the boarding step 222 is directly connected to the upper inclined ladder 212.

[0095] It can be seen from the above technical solution that the advantages and positive effects of the present invention are:

[0096] The boarding ladder of the present invention comprises a fixed ladder and a reversible ladder, and the reversible ladder can be reversed relative to the fixed ladder to realize the folding or unfolding of the reversible ladder. When the reversible ladder is unfolded, the reversible ladder is located below the fixed ladder, and the passing ship is docked near the reversible ladder and directly moored by the mooring pile. Therefore, the passing ship and the boarding ladder are relatively immobile, which reduces the ups and downs of the passing ship with the waves, and further reduces the phenomenon of the passing ship hitting the boarding ladder under the action of the waves, making it safer for personnel to travel between the offshore platform and the passing ship.

[0097] When the flip ladder is folded, it can be located above the sea level, reducing the towing resistance of the offshore platform during navigation and the restriction on the water depth of the channel.

[0098] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A boarding ladder for an offshore platform, characterized in that: It comprises a fixed ladder and a tilting ladder capable of rotating relative to the fixed ladder; The fixed ladder comprises: A fixing frame, used for fixed connection with the outer side of the offshore platform; the fixing frame has a containing space; An upper inclined ladder is located in the accommodation space of the fixing frame and is arranged to be inclined upward along the length direction of the fixing frame; The invertible ladder comprises: A flip frame having a storage space therein; the flip frame having a first side and a second side arranged on opposite sides, the first side extending along the length direction of the fixed frame, and the first side being rotatably connected to the outer side of the bottom of the fixed frame, so that the second side can be flipped to the inner side of the first side to unfold the flip ladder; A mooring bollard, arranged on the turning frame and protruding out of the turning frame, and used for tying a mooring rope; The boarding step is located in the accommodation space of the turning frame and is inclined along the extension direction of the first side. When the turning frame is unfolded, the boarding step is connected to the upper inclined ladder, allowing personnel to enter the boarding step from the direction of the first side and reach the upper inclined ladder to board the offshore platform. The first side of the turning frame is rotatably connected to the fixed frame through a turning member. The turning member includes: A first connecting key is fixed to the bottom of the fixing frame; the first connecting key is provided with a first connecting hole; A second connecting key is fixed to the first side of the flip frame and is arranged corresponding to the first connecting key; a second connecting hole is provided on the second connecting key; A connecting shaft is simultaneously passed through the first connecting hole and the second connecting hole to realize the rotational connection between the second connecting key and the first connecting key, thereby realizing the rotational connection between the flip ladder and the fixed ladder; the first connecting key and the second connecting key both include an annular portion and a connecting portion integrally connected to the outer edge of the annular portion; the connecting portion of the first connecting key is fixedly connected to the fixing frame, and the connecting portion of the second connecting key is fixedly connected to the flip frame, the middle of the annular portion of the first connecting key is hollow to form the first connecting hole, and the middle of the annular portion of the second connecting key is hollow to form the second connecting hole; an upper ear plate is provided on the inner side of the fixing frame, and the upper ear plate extends downward beyond the bottom of the fixing frame; A lower ear plate is provided at the second side of the flip frame, the lower ear plate is arranged corresponding to the upper ear plate, and the lower ear plate is detachably connected to the upper ear plate through a fastener.

2. The boarding ladder according to claim 1, characterized in that: The upper inclined ladder comprises a plurality of inclined ladder steps arranged in parallel and at intervals along the length direction of the fixing frame; The boarding step comprises a plurality of boarding pedals arranged in parallel and at intervals along the extending direction of the first side edge; Along the extension direction of the first side, the size of the boarding pedal is larger than the size of the inclined ladder pedal.

3. The boarding ladder according to claim 1, characterized in that: The reversible ladder also includes an outer side protection assembly; the outer side protection assembly includes: A plurality of outer railings are arranged at intervals along the extension direction of the first side edge and are located on the side of the boarding step close to the first side edge; A plurality of connecting chains; each of the chains is arranged between two adjacent outer railings, and the connecting chain is detachably connected to the outer railings.

4. The boarding ladder according to claim 3, characterized in that: The tilting ladder further comprises a lower inclined ladder obliquely arranged in the accommodation space, wherein the lower inclined ladder is located on the other side of the boarding step relative to the outer railing; When the turning frame is unfolded, the lower inclined ladder is located between the upper inclined ladder and the boarding step to connect the upper inclined ladder and the boarding step, and the inclination directions of the lower inclined ladder and the boarding step are opposite.

5. The boarding ladder according to claim 1, characterized in that: The overturning frame comprises a plurality of mooring piles; the plurality of mooring piles are arranged at intervals along the height direction of the overturning frame.

6. The boarding ladder according to claim 5, characterized in that: The mooring piles are provided at both ends of the turnover frame along the extension direction of the first side.

7. An offshore platform, characterized in that: It comprises a platform body and a boarding ladder as described in any one of claims 1 to 6, wherein the fixed ladder of the boarding ladder is fixed to the outer side of the platform body.

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