Marine heavy-load target object stability lifting and salvaging device based on catamaran
By installing support components and target position adjustment components at the moon pool position of the catamaran, the balance problem caused by the swaying of the target under wind and waves in large catamaran conditions was solved, achieving stable salvage and safe lifting.
Patent Information
- Application Number
- CN202410576885.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2026-01-16
AI Technical Summary
In conditions of high winds and waves, the existing salvage equipment on large catamarans is prone to causing the heavily loaded target to sway, leading to the catamaran losing balance and endangering the safety of the crew.
A support assembly, a lifting and salvage assembly, and a target position adjustment assembly are installed at the moon pool position of the catamaran. The lifting and lowering of the salvage platform and its position adjustment are controlled by the lifting components, and the target object is fixed by the adjusting claw and the limiting assembly to ensure the balance of the catamaran.
In adverse weather conditions, the heavy-load target is lifted stably, avoiding any impact on the balance of the catamaran and ensuring the safety of the crew and the vessel.
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Figure CN121341379A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of offshore salvage device, and particularly relates to a stability-improving salvage device for heavy offshore target based on a catamaran. BACKGROUND
[0002] In practice, for large-tonnage offshore equipment such as buoys, a catamaran with large volume and meeting the requirement of carrying capacity is usually used as a salvage ship. However, there are few salvage devices for large catamarans in the prior art, and the problem that the heavy target shakes under large wind and wave conditions, causing the catamaran to lose balance and posing a danger to the safety of the workers is not fully considered. SUMMARY
[0003] The present application provides a stability-improving salvage device for heavy offshore target based on a catamaran to overcome the technical problem that the existing salvage device for large catamaran does not fully consider the shaking of the target under large wind and wave conditions, causing the catamaran to lose balance and posing a danger to the safety of the workers.
[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:
[0005] A stability-improving salvage device for heavy offshore target based on a catamaran is arranged at a moon pool position of the catamaran and comprises a support assembly, a lifting salvage assembly and a target position adjusting assembly. The salvage device is connected to the catamaran through the support assembly, and the lifting salvage assembly is installed below the support assembly. The lifting salvage assembly comprises a lifting part and a salvage platform. One end of the lifting part is connected to the support assembly, and the other end is connected to the salvage platform. The target position adjusting assembly is arranged on one side of the salvage platform for carrying the target. When the target needs to be salvaged, the salvage platform is controlled to descend by the lifting part, and when the target is above the salvage platform, the salvage platform is controlled to ascend by the lifting part, and the position of the target on the salvage platform is adjusted to a position that can ensure the balance of the catamaran by the target position adjusting assembly.
[0006] Further, the target position adjusting assembly comprises a plurality of adjusting claws, the plurality of adjusting claws are uniformly arranged at the edge positions of the salvage platform and are all inclined towards the central position of the salvage platform. Each adjusting claw comprises an adjusting large arm, an adjusting small arm and a hydraulic cylinder, and is fixedly arranged at the edge position of the salvage platform through the adjusting large arm. The adjusting large arm, the adjusting small arm and the hydraulic cylinder are movably connected through a rotating shaft in pairs. When the position of the target needs to be adjusted, each hydraulic cylinder correspondingly performs a telescopic motion, thereby driving the adjusting small arm to move towards or away from the target to adjust the position of the target.
[0007] Further, the limiting assembly is connected with the catamaran at one end and connected with the salvage platform at the other end; the limiting assembly comprises a sliding column and a sliding rail, one end of the sliding column is slidably connected with the sliding rail, and the other end of the sliding column is connected with the salvage platform; the sliding rail is connected with the catamaran at the outer wall close to the catamaran.
[0008] Further, the sliding column comprises a mounting column and a sliding block, and the sliding block is arranged at the end of the mounting column away from the salvage platform; the sliding block comprises a first connecting block and a second connecting block, and the second connecting block is connected with the mounting column through the first connecting block; the second connecting block is matchedly connected with the sliding rail, and the outer wall opposite to the sliding rail is provided with a plurality of rolling balls.
[0009] Further, the edge position of the salvage platform is respectively provided with a guide plate and a plurality of protective plates; the guide plate comprises a first guide plate and a second guide plate, one end of the first guide plate and one end of the second guide plate are arranged at the edge position of the salvage platform, and the other ends of the first guide plate and the second guide plate are directed to the bow direction of the catamaran; the plurality of protective plates are all inclined to the center position close to the salvage platform.
[0010] Further, the lifting component comprises two pairs of winches, and each pair of winches is oppositely arranged and fixedly connected with the supporting assembly; the salvage platform is provided with a lifting ring at a position corresponding to the winch, and the hook of each winch is connected with the salvage platform through the lifting ring.
[0011] Further, the supporting assembly comprises two oppositely arranged supporting cross beams, both ends of each supporting cross beam are fixedly connected with the catamaran, each supporting cross beam is provided with a through hole through which the hook of the winch can pass, each winch is arranged above the supporting cross beam, and the hook of the winch is connected with the salvage platform through the through hole.
[0012] Beneficial effects: the salvage device is arranged at the moon pool position of the catamaran, the target object is lifted and salvaged through the lifting salvage assembly, and the position of the target object on the salvage platform is adjusted through the target object position adjusting assembly during the salvage process, so that the target object is righted and clamped and fixed, thereby ensuring that the salvage device loaded with heavy target objects does not affect the balance of the catamaran in bad weather environment, and the personal safety of the workers and the safety of the ship property are not affected. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0014] Figure 1It is a structure schematic diagram of the salvage device for the heavy load target object stability lifting based on the catamaran installed on the catamaran in the present application;
[0015] Figure 2 It is a first structure schematic diagram of the salvage device for the heavy load target object stability lifting based on the catamaran in the present application;
[0016] Figure 3 It is a second structure schematic diagram of the salvage device for the heavy load target object stability lifting based on the catamaran in the present application;
[0017] Figure 4 It is a structure schematic diagram of the salvage device for the heavy load target object stability lifting based on the catamaran without the guide plate in the present application;
[0018] Figure 5 It is a structure schematic diagram of the salvage device for the heavy load target object stability lifting based on the catamaran without the guide plate, the protection plate and the target object position adjusting assembly in the present application;
[0019] Figure 6 It is a structure schematic diagram of the adjusting claw in the embodiment of the present application;
[0020] Figure 7 It is a structure schematic diagram of the sliding column in the embodiment of the present application;
[0021] Figure 8 It is a principle schematic diagram of the hydraulic system controlling the hydraulic cylinder in the embodiment of the present application;
[0022] Figure 9 It is a flow chart of the salvage method based on the salvage device for the heavy load target object stability lifting based on the catamaran in the embodiment of the present application.
[0023] In the figure: 1, catamaran; 2, support assembly; 21, support cross beam; 3, lifting salvage assembly; 31, lifting part; 311, winch; 32, salvage platform; 321, guide plate; 322, protection plate; 323, lifting ring; 4, target object position adjusting assembly; 41, adjusting claw; 42, adjusting big arm; 43, adjusting small arm; 44, hydraulic cylinder; 5, limiting assembly; 51, sliding column; 511, mounting column; 512, sliding block; 513, first connecting block; 514, second connecting block; 52, sliding rail; A, filter; B, combination of motor and pump; C, control valve; D, reversing valve; E, throttle valve. DETAILED DESCRIPTION
[0024] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0025] The present embodiment provides a stability lifting salvage device for heavy load target on sea based on catamaran, as shown in the figure, Figures 1 to 4 The device is arranged at moon pool position of the catamaran 1, including support assembly 2, lifting salvage assembly 3 and target position adjusting assembly 4.
[0026] The salvage device is connected with the catamaran 1 through the support assembly 2, and the lifting salvage assembly 3 is installed below the support assembly 2.
[0027] The lifting salvage assembly 3 includes lifting component 31 and salvage platform 32.
[0028] One end of the lifting component 31 is connected with the support assembly 2, and the other end is connected with the salvage platform 32; the target position adjusting assembly 4 is arranged on the side of the salvage platform 32 for bearing the target; when the target needs to be salvaged, the salvage platform 32 is controlled to descend through the lifting component 31, and when the target is above the salvage platform 32, the salvage platform 32 is controlled to ascend through the lifting component 31, and the position of the target on the salvage platform 32 is adjusted to a position that can ensure the balance of the catamaran through the target position adjusting assembly 4.
[0029] In the present embodiment, the salvage device for heavy load target on sea is arranged based on the large moon pool on the catamaran, and the moon pool position is between the bridge and the aft house. Since the moon pool position is close to the barycenter position of the catamaran, the influence of the heavy load target on the balance of the catamaran can be reduced by arranging the salvage device at the moon pool position. Specifically, the support assembly 2 is fixedly installed at the moon pool position of the catamaran 1. When the target on sea is salvaged, the catamaran approaches the target, and then the salvage device is lowered, so that the target enters from the front of the catamaran, and when the target is above the salvage device, the target is salvaged by lifting the salvage platform 32, and the position of the target is adjusted and the target is held tightly by starting the target position adjusting assembly 4, and the catamaran sails away from the sea area after the salvage is completed. In this process, the target is relatively stationary with the whole catamaran, and will not be affected by the waves, and will not collide with the catamaran, etc. After the catamaran sails to the target position, the target can be lifted out of the catamaran from above the moon pool. The salvage device can quickly and stably salvage the target on sea, and the whole salvage process is stable, fast and smooth, and the position of the target is adjusted in real time by the target position adjusting assembly 4 to avoid affecting the balance of the catamaran, so as to ensure the safety of the staff.
[0030] Specifically, in the embodiment, the salvage platform 32 is a square mechanism, and the panel of the salvage platform in contact with the target object is a mesh structure, which ensures flexible contact between the salvage platform and the target object during salvage, thereby avoiding damage to the target object. Meanwhile, reinforcing ribs are arranged at the bottom of the salvage platform to strengthen the bearing strength of the salvage platform, thereby meeting the requirements of salvaging heavy objects.
[0031] In specific embodiments, as shown in Figure 3 The target object position adjusting assembly 4 includes a plurality of adjusting clamping jaws 41, which are uniformly arranged at the edge positions of the salvage platform 32 and are inclined towards the central position of the salvage platform 32. Specifically, in the embodiment, four adjusting clamping jaws are preferably arranged, which cooperate with each other to right the heavy target object and position it at the central position of the salvage platform 32, thereby reducing the influence of the heavy target object on the balance of the catamaran. Meanwhile, the adjusting clamping jaws clamp the heavy target object after adjusting its position, thereby ensuring the stability of the heavy target object and avoiding affecting the smooth sailing of the catamaran.
[0032] Specifically, as shown in Figure 6 Each adjusting clamping jaw 41 includes an adjusting large arm 42, an adjusting small arm 43, and a hydraulic cylinder 44, and is fixedly arranged at the edge position of the salvage platform 32 through the adjusting large arm 42. The adjusting large arm 42, the adjusting small arm 43, and the hydraulic cylinder 44 are movably connected through a rotating shaft. When it is necessary to adjust the position of the target object, each hydraulic cylinder 44 correspondingly performs extension and retraction, thereby driving the adjusting small arm 43 to move towards or away from the target object, so as to adjust the position of the target object.
[0033] Specifically, in the embodiment, the adjusting large arm 42 is used to provide support and includes a bottom plate and side plates oppositely arranged at both ends of the bottom plate. The bottom plate is fixedly arranged at the end corner position close to the salvage platform 32 through bolt connection or welding. The side plates are inclined towards the central position of the salvage platform 32. One end of the hydraulic cylinder 44 is connected with a hydraulic system arranged below the salvage platform (not shown in the figure) and performs extension and retraction under the control of the hydraulic system. The other end of the hydraulic cylinder close to the salvage platform 32 is hingedly connected with one end of the adjusting large arm 42 through a rotating shaft. The other end of the hydraulic cylinder 44 is hingedly connected with one end of the adjusting small arm 43 through a rotating shaft. The position of the other end of the adjusting small arm 43 close to the other end of the adjusting large arm 42 is hingedly connected with the adjusting large arm 42 through a rotating shaft. In the embodiment, the end of the adjusting small arm 43 in contact with the target object is preferably arranged in a circular arc structure, thereby increasing the contact area with the target object and facilitating the adjustment and fixation of the position of the target object. In practice, the end of the adjusting small arm in contact with the target object can also be adaptively selected according to the shape of the target object, so as to facilitate work. Meanwhile, a flexible material structure such as rubber can be arranged at the end of the adjusting small arm in contact with the target object, so as to avoid scratching the target object.
[0034] Specifically, the control principle of the hydraulic system is as shown in the figure Figure 8 The hydraulic system comprises a filter A, a combination of a motor and a pump B, a control valve C, a reversing valve D and a throttle valve E, controls the hydraulic cylinder through the hydraulic system, and further controls the movement of the adjusting arm, so that the adjusting arm adjusts the position of the target object and fixes the target object during the movement of the ship.
[0035] In specific embodiments, a limiting assembly 5 is further included, one end of the limiting assembly 5 is connected with the catamaran 1, and the other end is connected with the salvage platform 32; as shown in the figure Figure 5 The limiting assembly 5 comprises a sliding column 51 and a sliding rail 52, one end of the sliding column 51 is slidably connected with the sliding rail 52, the other end is connected with the salvage platform 32, and the sliding rail 52 is connected with the catamaran 1 close to the outer wall of the catamaran. Specifically, the setting of the limiting assembly 5 can play a guiding and limiting role, avoiding the shaking of the salvage platform 32 in the horizontal direction during lifting, thereby further improving the wind and wave resistance of the salvage device, stably lifting the heavy salvage object, and ensuring the smooth progress of the salvage process.
[0036] In specific embodiments, as shown in the figure Figure 7 The sliding column 51 comprises a mounting column 511 and a sliding block 512, and the sliding block 512 is arranged at the end of the mounting column 511 away from the salvage platform 32; the sliding block 512 comprises a first connecting block 513 and a second connecting block 514, and the second connecting block 514 is connected with the mounting column 511 through the first connecting block 513; the second connecting block 514 is matched with the sliding rail 52, and the outer wall of the second connecting block 514 opposite to the sliding rail 52 is provided with a plurality of ball bearings. Specifically, in the embodiment, preferably, universal bearings are used as ball bearings, one end of each universal bearing is fixed to the outer wall of the second connecting block 514, and the other end is in contact with the inner wall of the sliding rail 52, preventing the sliding column 51 and the sliding rail 52 from being stuck due to excessive shaking of the ship, thereby ensuring the smooth progress of the salvage work, as shown in the figure Figure 7 Six universal bearings are arranged in the embodiment.
[0037] In specific embodiments, as shown in the figure Figure 3 The edge position of the salvage platform 32 is respectively provided with a guide plate 321 and a plurality of protective plates 322; the guide plate 321 comprises a first guide plate and a second guide plate, one end of the first guide plate and one end of the second guide plate are arranged at the edge position of the salvage platform 32, and the other ends are directed towards the bow direction of the catamaran; the plurality of protective plates 322 are all inclined towards the center position of the salvage platform 32.
[0038] Specifically, in the embodiment, the guide plate and the protection plate are arranged at different edge positions of the salvage platform respectively. The target object can be guided to smoothly enter the salvage platform 32 through the arrangement of the guide plate. The target object can be prevented from shaking and bumping the ship body through the arrangement of the protection plate near the positions of the two side ship bodies. The target object can be prevented from deviating out of the salvage platform through the arrangement of the protection plate opposite to the guide plate. Meanwhile, the flexible material structure such as rubber is arranged at the end of the protection plate 322 in contact with the target object to avoid scratching the target object.
[0039] In the specific embodiment, as shown in the figure, Figures 3 to 5 The lifting component 31 includes two pairs of winches 311, and each pair of winches is opposite to each other and fixedly connected with the support assembly 2. The salvage platform 32 is provided with a lifting ring 323 at a position corresponding to the winch 311. The hook of each winch is connected with the lifting ring 323 and then connected with the salvage platform 32.
[0040] In the specific embodiment, the support assembly 2 includes two oppositely arranged support beams 21. Each support beam 21 is fixedly connected with the catamaran 1 at both ends. Each support beam 21 is provided with a through hole through which the hook of the winch can pass. Each winch 311 is installed above the support beam 21, and the hook of the winch is connected with the salvage platform 32 through the through hole.
[0041] Specifically, in the embodiment, the lifting ring is installed on the salvage device 332 at a position corresponding to the winch. The winch includes a mounting seat, a reel, a motor, a lifting rope and a hook. The mounting seat is fixedly connected with the support assembly 2. The reel is arranged in the mounting seat, and one end of the reel is connected with the motor. The lifting rope is wound on the reel, and one end of the lifting rope is connected with the hook and then connected with the lifting ring. When the winch 311 is controlled to wind up or lower the lifting rope, the salvage platform 32 can be driven to move, so as to complete the salvage work. In the embodiment, preferably, the through hole through which the hook of the winch can pass is arranged on each support beam 21, so that the winch is arranged above the support beam 21. The support force of the support beam 21 can make the salvage device more stable during operation. In practice, the position of the winch can also be arranged at the side of the support assembly 2 or other parts, so as to ensure that the winch is fixedly connected with the support assembly 2 and then smoothly controls the movement of the salvage platform 32.
[0042] Specifically, in the embodiment, the support beam 21 is fixed on the catamaran 1 by means of bolt connection or welding, thereby providing support for the salvage of the target object. In practice, the strength of the support beam can be strengthened according to the weight of the target object, for example, a reinforcing beam is arranged between the support beams.
[0043] In the embodiment, the salvage device is used to propose a salvage method for the heavy target object on the sea. The salvage device installed on the catamaran is controlled through the method to avoid the deviation of the target object, for example,Figure 9 The specific steps include:
[0044] S1: fishing the target object by the fishing device;
[0045] S2: acquiring stress data of the fishing device carrying the target object;
[0046] Specifically, in S2, the stress data is the tension of each lifting rope of the fishing device acquired by the tension gauge. In addition, the tension of each lifting rope can also be calculated based on the deformation data of each lifting rope, and the calculation formula is:
[0047]
[0048] In the formula, Y is the Young's modulus, Δl represents the stretching amount of the lifting rope, l0 represents the length of the lifting rope, and S represents the cross-sectional area of the lifting rope.
[0049] S3: processing the stress data;
[0050] In specific embodiments, in S3, the process of processing the stress data is:
[0051] S31: filtering the stress data to filter out data deviation caused by ship body swing due to sea waves;
[0052] S32: performing average value processing on the stress data after filtering processing.
[0053] S4: calculating the target object offset load by the offset load calculation formula and the processed stress data;
[0054] In specific embodiments, in S4, the process of calculating the target object offset load by the offset load calculation formula and the processed stress data is:
[0055] S41: calculating the offset load of the target object in the forward direction of the ship by the moment balance formula, that is, the longitudinal position difference D1 between the center of gravity of the target object and the center point of the fishing platform in the fishing device, and the calculation formula is:
[0056] D1 = |L1-L2|
[0057] Wherein,
[0058] L1 = F1L / G
[0059] L2 = F2L / G
[0060] In the formula, F1 is the sum of the forces of the two ropes at the bow; F2 is the sum of the forces of the two ropes at the stern; G is the gravity of the target object; L is the moment distance between the bow rope and the stern rope, L1 and L2 are the moment lengths between the center of gravity of the measured target object and the two ropes respectively, and L1+L2=L;
[0061] S42: The off-loading amount of the target object in the vertical direction of the ship's forward direction, i.e., the lateral position difference D2 between the center of gravity of the target object and the center point of the salvage platform in the salvage device, is calculated by a moment balance formula, and the calculation formula is:
[0062] D2=|L3-L4|
[0063] Wherein,
[0064] L3=F3L' / G
[0065] L4=F4L' / G
[0066] In the formula, F3 is the sum of the forces of the two ropes on the left side; F4 is the sum of the forces of the two ropes on the right side; G is the gravity of the target object; L' is the moment distance between the left rope and the right rope, L3 and L4 are the moment lengths between the center of gravity of the measured target object and the two ropes respectively, and L3+L4=L';
[0067] S43: The longitudinal position difference D1 and the lateral position difference D2 between the center of gravity of the target object and the center point of the salvage platform in the salvage device are the off-loading amount of the target object.
[0068] S5: The position of the target object is adjusted according to the off-loading amount of the target object, i.e., the center of gravity of the target object is pushed to the center position of the salvage platform, so as to prevent the off-loading of the target object.
[0069] Specifically, for a large weight target object, the salvage device in the embodiment adjusts the position of the target object when the target object is still subjected to the water buoyancy, so that the adjustment process is more convenient, and finally the target object is tightly held at the adjusted position.
[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A catamaran-based stability-enhancing salvage device for heavy offshore targets, characterized in that, The moon pool position of the catamaran (1) is provided with a support assembly (2), a lifting salvage assembly (3) and a target position adjusting assembly (4); The salvage device is connected with the catamaran (1) through the support assembly (2), and the lower portion of the support assembly (2) is provided with the lifting salvage assembly (3); The lifting salvage assembly (3) comprises a lifting component (31) and a salvage platform (32); One end of the lifting component (31) is connected with the support assembly (2), and the other end is connected with the salvage platform (32); the target position adjusting assembly (4) is arranged on one side surface of the salvage platform (32) for carrying the target object; when the target object needs to be salvaged, the salvage platform (32) is controlled to descend through the lifting component (31), and when the target object is above the salvage platform (32), the salvage platform (32) is controlled to ascend through the lifting component (31), and the position of the target object on the salvage platform (32) is adjusted to a position capable of ensuring the balance of the catamaran through the target position adjusting assembly (4).
2. A catamaran based offshore heavy lift target stability boosting salvage device according to claim 1, characterized in that, The target position adjusting assembly (4) comprises a plurality of adjusting claws (41), and the adjusting claws (41) are uniformly arranged at the edge positions of the salvage platform (32) and are all inclined towards the central position of the salvage platform (32); Each adjusting claw (41) comprises an adjusting large arm (42), an adjusting small arm (43) and a hydraulic cylinder (44), and is fixedly arranged at the edge position of the salvage platform (32) through the adjusting large arm (42); the adjusting large arm (42), the adjusting small arm (43) and the hydraulic cylinder (44) are movably connected through the rotating shaftes, and when the position of the target object needs to be adjusted, each hydraulic cylinder (44) is correspondingly subjected to the extension and contraction movement, so as to drive the adjusting small arm (43) to move towards or away from the target object, so as to adjust the position of the target object.
3. A catamaran based offshore heavy lift target stability boosting salvage apparatus according to claim 1, characterised in that, Further comprising a limiting assembly (5), one end of the limiting assembly (5) is connected with the catamaran (1), and the other end is connected with the salvage platform (32); The limiting assembly (5) comprises a sliding column (51) and a sliding rail (52), one end of the sliding column (51) is slidably connected with the sliding rail (52), and the other end is connected with the salvage platform (32); the sliding rail (52) is connected with the catamaran (1) close to the outer wall of the catamaran.
4. A catamaran based offshore heavy lift target stability boosting salvage apparatus according to claim 3, characterised in that, The sliding column (51) comprises a mounting column (511) and a sliding block (512), and the sliding block (512) is arranged at the end of the mounting column (511) away from the salvage platform (32); The sliding block (512) comprises a first connecting block (513) and a second connecting block (514), and the second connecting block (514) is connected with the mounting column (511) through the first connecting block (513); The second connecting block (514) is matchedly connected with the sliding rail (52), and a plurality of rolling balls are arranged on the outer wall opposite to the sliding rail (52).
5. A stability enhancing salvage device for offshore heavy lift targets based on catamarans according to claim 1 or 4, characterized in that, The edge position of the salvage platform (32) is respectively provided with a guide plate (321) and a plurality of protective plates (322). The guide plate (321) comprises a first guide plate and a second guide plate, one end of the first guide plate and one end of the second guide plate are arranged at the edge position of the salvage platform (32), and the other ends are directed towards the bow direction of the catamaran; a plurality of guard plates (322) are all inclined towards the central position close to the salvage platform (32).
6. A catamaran based offshore heavy lift target stability boosting salvage apparatus according to claim 1, characterised in that, The lifting component (31) comprises two pairs of winches (311), and each pair of winches is opposite to each other and fixedly connected with the support assembly (2); the salvage platform (32) is provided with a lifting ring (323) at a position corresponding to the winch (311), and the hook of each winch is connected with the salvage platform (32) through the lifting ring (323).
7. A catamaran based offshore heavy lift target stability boosting salvage apparatus according to claim 6, characterised in that, The support assembly (2) comprises two oppositely arranged support cross beams (21), the two ends of each support cross beam (21) are fixedly connected with the catamaran (1), and each support cross beam (21) is provided with a through hole through which the hook of the winch can pass, each winch (311) is installed above the support cross beam (21), and the hook of the winch is connected with the salvage platform (32) through the through hole.