A ship heavy accessory hoisting positioning auxiliary structure

Abstract

The application belongs to the technical field of hoisting of ship accessories, and discloses a hoisting and positioning auxiliary structure for heavy accessories of a ship, which comprises a ship engine and an engine mounting frame, wherein the engine mounting frame is arranged on the ship and used for butt joint installation of the ship engine. The positioning assembly is arranged inside the engine mounting frame, the third hydraulic rod is used to drive the correction plate to tightly abut against the inner wall of the mounting frame to establish a positioning datum, the inverted-eights-shaped limiting support plate is used to automatically guide and center the hoisted engine, the engine is stably supported by the limiting support plate after being separated from the steel cable, and finally the four lifting hydraulic rods are used to synchronously drive the engine to stably descend and butt joint, so that the technical problems of the background art, i.e. the engine is prone to swing due to the flexibility of the steel cable, it is difficult to maintain a horizontal posture, manual righting is laborious, and accurate positioning is difficult, are solved. The mechanical structure guarantees the horizontal degree and the centering property during the whole butt joint process, the workload of manual auxiliary positioning is greatly reduced, the butt joint precision is high, and the safety is good.

Description

Technical Field

[0001] This invention belongs to the field of ship parts hoisting technology, specifically a hoisting and positioning auxiliary structure for heavy ship parts. Background Technology

[0002] Heavy component hoisting and positioning refers to the safe and accurate transfer and installation of oversized and overweight components from storage or transportation to predetermined positions on the hull structure or equipment base during ship construction, repair, or conversion.

[0003] Currently, the hoisting of ship engines mainly uses gantry cranes in conjunction with steel cables, supplemented by manual assistance. However, during the hoisting process, due to the flexibility of the steel cables, it is difficult for the engine to maintain a horizontal position continuously, and it is prone to significant swaying, making it difficult to achieve precise alignment with the positioning guide rod in the installation area. In addition, the engine itself is quite heavy, and manual straightening is not only laborious but also difficult to effectively suppress swaying, which can easily cause bending and damage to the guide rod, further increasing the difficulty of accurate positioning. Therefore, an auxiliary structure for hoisting and positioning heavy ship components is proposed. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides an auxiliary structure for the hoisting and positioning of heavy ship components. This structure solves the problem that existing ship engine hoisting relies on gantry cranes and steel cables, supplemented by manual labor. However, due to the flexibility of the steel cables, it is difficult to keep them level and they are prone to swinging, which makes precise docking difficult. Furthermore, the engines are heavy, and manual straightening is laborious, which can easily cause bending and damage to the guide rods, further exacerbating the difficulty of positioning.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary structure for lifting and positioning heavy ship components, comprising a ship engine and an engine mounting bracket, wherein the engine mounting bracket is disposed on the ship for docking and installing the ship engine, and further comprising: A positioning component is disposed inside the engine mounting bracket, and the outer wall of the positioning component contacts the inner wall of the engine mounting bracket to establish a positioning reference. An adjustment component is disposed on top of the positioning component; A receiving component, which is mounted on top of the adjusting component, is used to receive the ship's engine; The receiving component includes lifting hydraulic rods fixed to the four corners of the top of the adjusting component, and the four lifting hydraulic rods are connected by a stabilizing frame. A beam plate is installed at the top of the piston rod of each pair of lifting hydraulic rods, and the two beam plates are connected by a first support plate. The top of the two beams is symmetrically provided with limiting support plates. The two limiting support plates are in the shape of an inverted "V" shaped horn, which is wider at the top and narrower at the bottom, and their inner inclined surfaces are adapted to the two side positioning inclined surfaces at the bottom of the ship engine. In the initial state, the two limiting support plates are higher than the top mating surface of the engine mounting bracket.

[0006] Preferably, the height difference between the supporting surfaces of the two limiting bearing plates and the top mating surface of the engine mounting bracket is greater than the vertical distance from the bottom flange surface of the marine engine to its positioning ramp.

[0007] Preferably, the beam, the limiting support plate, and the ship engine are slowly lowered by retracting the lifting hydraulic rod until the bottom mounting flange of the ship engine is fitted with the top mating surface of the engine mounting bracket to complete the docking.

[0008] Preferably, the lower end of the limiting support plate is hinged to the top of the beam plate, and a first hydraulic rod is provided between the beam plate and the limiting support plate; One end of the first hydraulic rod is hinged to the limiting support plate, and the other end is hinged to the top of the beam plate.

[0009] Preferably, a lifting hook is installed on the top of the first support plate for connecting to a lifting rope.

[0010] Preferably, the positioning component includes a third support plate, which is embedded in the inner cavity of the engine mounting bracket. A mounting seat is installed at the bottom of the third support plate, and a roller is provided on the mounting seat.

[0011] Preferably, a third hydraulic rod is installed at each of the four corners of the bottom of the third support plate, and a straightening plate is installed on the outer end of the piston rod of the two third hydraulic rods located on the same side of the third support plate.

[0012] Preferably, the outer surface of the corrective plate has a convex surface that rises outward in the middle, and the two corrective plates are located on the left and right sides of the third support plate, respectively. The outer end of the piston rod of the third hydraulic rod is fixedly connected to the straightening plate, and the straightening plate moves horizontally as the third hydraulic rod extends and retracts.

[0013] Preferably, the adjustment assembly includes two guide rails fixed to the top of the third support plate, and a second support plate is slidably mounted on the guide rails via a slider; The cylinder end of the lifting hydraulic rod is fixed to the top of the second support plate.

[0014] Preferably, a rectangular through groove is provided in the middle of the second support plate, and mating lugs are fixed on the inner walls of both sides of the rectangular through groove; Two second hydraulic rods are installed on the top of the third support plate. The piston rods of the two second hydraulic rods are arranged horizontally in opposite directions, and the piston rod ends of the second hydraulic rods are fixedly connected to the mating lugs.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention places the positioning component inside the engine mounting bracket. A third hydraulic rod drives the straightening plate to press against the inner wall of the mounting bracket to establish a positioning reference. Then, an inverted V-shaped limiting support plate automatically guides and centers the hoisted engine, allowing it to be stably supported by the limiting support plate after detaching from the steel cable. Finally, four lifting hydraulic rods synchronously drive the engine to descend smoothly for docking. This invention solves the technical problems in the prior art where the flexibility of the steel cable causes the engine to swing easily, making it difficult to maintain a horizontal posture, requiring laborious manual straightening, and making precise positioning difficult. The entire docking process is ensured by the mechanical structure to maintain horizontality and centering, significantly reducing the amount of manual alignment work, resulting in high docking accuracy and good safety.

[0016] This invention uses a first hydraulic rod to drive the limiting receiving plate to swing around the hinge point, which can flexibly adjust the opening width and tilt angle between the two limiting receiving plates, adapting to various types of marine engines with different bottom widths and slope angles; and uses a second hydraulic rod to drive the second support plate to slide horizontally along the guide rail, which can precisely fine-tune the horizontal position of the receiving component, compensate for positional deviations at different installation positions, significantly improve the versatility and adaptability of the device, and one set of devices can meet the hoisting and docking needs of various engine models, reducing equipment procurement costs.

[0017] This invention enables the integrated hoisting and deployment of the entire auxiliary structure by setting up a hoisting hook, or by using bottom rollers for rolling and pushing into place, eliminating the need for on-site assembly of individual components, and making installation and deployment fast and efficient. After docking, the hydraulically driven limit receiving plate and the straightening plate can be quickly unlocked and pulled out directly by the rollers. The deployment and dismantling process of the entire device is mechanized and streamlined, which greatly improves the overall efficiency of hoisting operations, and is especially suitable for multi-station continuous operation scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the planar structure of the receiving component, engine mounting bracket, adjustment component, and positioning component of the present invention; Figure 3 This is a schematic diagram of the external structure of the receiving component, adjusting component, and positioning component of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the receiving component of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the receiving component and the adjusting component of the present invention; Figure 6 This is a schematic diagram of the disassembled structure of the adjustment component of the present invention; Figure 7 This is a top view of the adjustment component and positioning component of the present invention; Figure 8 This is a bottom view of the positioning component of the present invention.

[0019] In the diagram: 1. Marine engine; 2. Receiving assembly; 21. First support plate; 22. Lifting hook; 23. Limiting receiving plate; 24. First hydraulic rod; 25. Beam plate; 26. Lifting hydraulic rod; 27. Stabilizer; 3. Engine mounting bracket; 4. Adjustment assembly; 41. Second support plate; 42. Slider; 43. Guide rail; 44. Rectangular through slot; 45. Docking lug; 46. Second hydraulic rod; 5. Positioning assembly; 51. Third hydraulic rod; 52. Straightening plate; 53. Third support plate; 54. Mounting seat; 55. Roller. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 8 As shown, the present invention provides an auxiliary structure for lifting and positioning heavy ship components, including a ship engine 1 and an engine mounting bracket 3. The engine mounting bracket 3 is disposed on the ship for docking and installing the ship engine 1. It also includes: Positioning component 5 is disposed inside the engine mounting bracket 3, and the outer wall of positioning component 5 is in contact with the inner wall of engine mounting bracket 3 to establish a positioning reference. Adjustment component 4 is positioned on top of positioning component 5; Component 2 is mounted on top of adjustment component 4 and is used to support the ship engine 1. Among them, the receiving component 2 includes lifting hydraulic rods 26 fixedly installed at the four corners of the top of the adjusting component 4, and the four lifting hydraulic rods 26 are connected by a stabilizer 27; A beam plate 25 is installed at the top of the piston rod of each pair of lifting hydraulic rods 26, and the two beam plates 25 are connected by a first support plate 21. The top of the two beams 25 are symmetrically provided with limiting support plates 23. The two limiting support plates 23 are in the shape of an inverted "eight" shaped horn with a wider top and a narrower bottom, and their inner inclined surfaces are adapted to the two side positioning inclined surfaces at the bottom of the ship engine 1. In the initial state, the two limiting support plates 23 are higher than the top mating surface of the engine mounting bracket 3; The height difference between the support surfaces of the two limiting support plates 23 and the top mating surface of the engine mounting bracket 3 is greater than the vertical distance from the bottom flange surface of the marine engine 1 to its positioning slope.

[0022] The lifting hydraulic rod 26 is used to retract the beam plate 25, the limiting support plate 23 and the ship engine 1, which are then slowly moved down until the bottom mounting flange surface of the ship engine 1 is in contact with the top mating surface of the engine mounting bracket 3 to complete the docking.

[0023] Positioning component 5 is placed on the inner side of engine mounting bracket 3. The outer wall of positioning component 5 contacts the inner wall of engine mounting bracket 3 to establish a positioning reference, providing a precise installation reference for the entire auxiliary structure, ensuring the alignment accuracy between the auxiliary structure and the installation station, and solving the technical problem of the engine and the installation area being difficult to accurately align. The ship engine 1, lifted by the gantry crane, is lowered above the two limiting support plates 23. The two limiting support plates 23 have an inverted "V" shaped flared structure that is wider at the top and narrower at the bottom, which guides the engine to the bottom sides. This allows the engine to automatically move towards the center during the lowering process, achieving automatic coarse positioning in the horizontal direction. This corrects the offset caused by the steel cable lifting and avoids the technical problems of engine swaying due to the flexibility of the steel cable and the difficulty of manual straightening. As the ship engine 1 continues to be lowered, the positioning slopes on both sides of its bottom fit and conform to the inner slopes of the limiting support plate 23. The weight of the ship engine 1 is transferred to the lifting hydraulic rod 26 by the two beam plates 25 through the first support plate 21, so as to achieve stable support of the engine and maintain a horizontal posture after the engine is detached from the steel cable. This avoids the technical problem that the steel cable is not flexible enough to maintain a horizontal posture and effectively suppresses swaying. The piston rods of the lifting hydraulic rods 26 retract synchronously, causing the beam plate 25, the limiting support plate 23 and the ship engine 1 to move down smoothly as a whole. The synchronous movement of the four lifting hydraulic rods 26 ensures that the engine always remains in a horizontal state, achieving no tilting or shaking during the slow and smooth descent of the engine, thus avoiding the technical problems of the large weight of the engine and the difficulty of precise positioning by humans. The ship engine 1 continues to move down under the action of the lifting hydraulic rod 26 until the bottom mounting flange surface of the engine is completely aligned with the top mating surface of the engine mounting bracket 3, thus completing the precise docking. The entire docking process is ensured by the mechanical structure to maintain the level and centering, resulting in high docking accuracy. This significantly reduces the amount of manual alignment work and avoids the technical problems of laborious manual straightening and difficulty in precise positioning. The four lifting hydraulic rods 26 are connected by a stabilizer 27 to form an overall frame structure, which enhances the synchronization of the four hydraulic rods and the overall structural rigidity, avoids tilting caused by uneven force on one side, and ensures the stability of the lifting process.

[0024] like Figures 2-5 As shown, the lower end of the limiting support plate 23 is hinged to the top of the beam plate 25, and a first hydraulic rod 24 is provided between the beam plate 25 and the limiting support plate 23. One end of the first hydraulic rod 24 is hinged to the limiting support plate 23, and the other end is hinged to the top of the beam plate 25.

[0025] Before hoisting the ship engine 1, the first hydraulic rod 24 is driven to extend and retract according to the bottom width and slope angle of the engine to be hoisted. This causes the limiting support plate 23 to swing around the hinge point between its lower end and the beam plate 25, adjusting the upper width and tilt angle between the two limiting support plates 23 so that the inner slope matches the two sides of the bottom of the engine. This adapts to different models and sizes of ship engines, improving the versatility and compatibility of the device. The ship engine 1, lifted by the gantry crane, is lowered above the flared openings of the two limiting support plates 23. The inverted V-shaped guide ramp formed by the first hydraulic rod 24 automatically centers the engine along the ramp during the lowering process, correcting the horizontal deviation caused by the steel cable lifting. Coarse positioning can be completed without manual straightening.

[0026] like Figures 2-5 As shown, a lifting hook 22 is installed on the top of the first support plate 21 for connecting to the lifting rope.

[0027] The gantry crane's rope is connected to the lifting hook 22 on the top of the first support plate 21. After lifting, the receiving component 2, the adjusting component 4, and the positioning component 5 are lifted as a whole into the interior of the engine mounting bracket 3. The positioning component 5 automatically completes the positioning and installation by contacting the outer wall with the inner wall of the engine mounting bracket 3, realizing the overall rapid deployment of the auxiliary structure without the need for on-site assembly of each component, greatly improving installation efficiency, and ensuring the relative positional accuracy between each component.

[0028] like Figure 2 , Figure 3 and Figure 8 As shown, the positioning component 5 includes a third support plate 53, which is embedded in the inner cavity of the engine mounting bracket 3. A mounting base 54 is installed at the bottom of the third support plate 53, and a roller 55 is provided on the mounting base 54. The four corners of the bottom of the third support plate 53 are equipped with third hydraulic rods 51, and the piston rods of the two third hydraulic rods 51 located on the same side of the third support plate 53 are jointly equipped with a straightening plate 52. The outer surface of the correction plate 52 has a convex surface that rises outward in the middle, and the two correction plates 52 are located on the left and right sides of the third support plate 53, respectively. The outer end of the piston rod of the third hydraulic rod 51 is fixedly connected to the straightening plate 52, and the straightening plate 52 moves horizontally as the third hydraulic rod 51 extends and retracts.

[0029] Align the positioning component 5 with the inner cavity entrance of the engine mounting bracket 3, and make rolling contact with the bottom end face of the engine mounting bracket 3 through the roller 55 on the bottom mounting seat 54 of the third support plate 53. Push the positioning component 5 into the inner cavity of the mounting bracket along the rolling direction. The roller structure changes the sliding friction into rolling friction, greatly reducing the pushing resistance and making the placement of the heavy auxiliary structure easier and smoother. After the positioning component 5 is pushed into place, the four third hydraulic rods 51 extend synchronously, pushing the left and right straightening plates 52 to move to both sides respectively. The raised convex surface of the outer middle part of the straightening plate 52 gradually contacts and presses against the inner wall of the engine mounting bracket 3. The convex surface structure has an automatic centering function. When the straightening plates on both sides press against each other synchronously, the third support plate 53 is automatically aligned with the mounting bracket cavity, eliminating gaps and establishing a precise positioning benchmark, thus solving the problem of insufficient hoisting and positioning accuracy. The third hydraulic rod 51 maintains pressure, causing the two straightening plates 52 to press against the inner wall of the engine mounting bracket 3 with a set pressure. The positioning component and the mounting bracket are rigidly connected by friction. The hydraulic pressing method is reliable and gapless, ensuring that the positioning reference does not shift during the subsequent engine docking process, thus improving docking accuracy and stability. After the ship engine 1 is docked, the first hydraulic rod 24 retracts, causing the limiting support plate 23 to swing outward and release. The third hydraulic rod 51 retracts, causing the straightening plate 52 to retract inward and detach from the inner wall of the mounting frame. Then, the entire auxiliary structure is rolled outward along the bottom of the mounting frame by the roller 55. The unlocking and exiting process is quick and smooth, and it can be quickly transferred to the next work position, improving the overall efficiency of the hoisting operation.

[0030] like Figures 5-7 As shown, the adjustment component 4 includes two guide rails 43 fixed to the top of the third support plate 53, and a second support plate 41 is slidably disposed on the guide rails 43 via a slider 42; The cylinder end of the lifting hydraulic rod 26 is fixed to the top of the second support plate 41; A rectangular through groove 44 is provided in the middle of the second support plate 41, and mating lugs 45 are fixed on the inner walls of both sides of the rectangular through groove 44. Two second hydraulic rods 46 are installed on the top of the third support plate 53. The piston rods of the two second hydraulic rods 46 are arranged horizontally in opposite directions, and the piston rod ends of the second hydraulic rods 46 are fixedly connected to the mating lugs 45.

[0031] Align the positioning component 5 with the inner cavity entrance of the engine mounting bracket 3, and push the positioning component into the inner cavity of the mounting bracket along the rolling direction by the roller 55 on the bottom mounting seat 54 of the third support plate 53 rolling contact with the bottom end face of the mounting bracket. Alternatively, it can be hoisted to the inner side of the engine mounting bracket 3 by a gantry crane. The roller structure changes the sliding friction into rolling friction, greatly reducing the pushing resistance and making the placement of the heavy auxiliary structure easier and smoother. After the positioning component 5 is pushed into place, a precise positioning reference is established. Based on the relative position of the docking hole of the engine mounting bracket 3 and the positioning structure at the bottom of the engine, the two second hydraulic rods 46 are driven to extend and retract synchronously. The docking lug 45 drives the second support plate 41 to slide horizontally along the guide rail 43, adjusting the receiving component 2 to the preset centering position. The guide rail slider structure ensures the straightness and stability of the horizontal adjustment. The synchronous drive of the two hydraulic rods provides stable adjustment power, which can achieve precise alignment and compensate for the position deviation when the installation is in place. By visual inspection or manual confirmation of the horizontal alignment of the mounting holes at the bottom of the engine with the docking holes of the mounting bracket, if there is a deviation, the second hydraulic rod 46 is driven to move the second support plate 41 horizontally along the guide rail 43 to achieve precise fine adjustment of the horizontal position of the engine, so that the docking holes are aligned one by one, without the need for repeated lifting and adjustment, thus improving docking efficiency and accuracy. After horizontal alignment is completed, the piston rod of the lifting hydraulic rod 26 is retracted synchronously, which drives the beam plate 25, the limiting support plate 23 and the supported ship engine 1 to move down smoothly as a whole. The four lifting hydraulic rods are synchronized through the synchronous circuit to ensure consistent movement, so that the engine always maintains a horizontal attitude. Combined with the precise alignment after horizontal fine adjustment, high-precision docking is achieved. After the ship engine 1 is docked, the third hydraulic rod 51 retracts, causing the straightening plate 52 to retract inward and detach from the inner wall of the mounting frame. Then, the entire auxiliary structure is rolled outward along the bottom of the mounting frame by the roller 55. The unlocking and exiting process is quick and smooth, and it can be quickly transferred to the next work station.

[0032] Working principle and usage process of this invention: Align the positioning component 5 with the entrance of the inner cavity of the engine mounting bracket 3, and push the positioning component into the inner cavity of the mounting bracket along the rolling direction by the roller 55 on the bottom mounting seat 54 of the third support plate 53 rolling contact with the bottom end face of the mounting bracket; or connect it with the gantry crane and the lifting hook 22, and lift the receiving component 2, the adjusting component 4 and the positioning component 5 as an integrated whole into the interior of the engine mounting bracket 3. After the positioning component 5 is in place, the four third hydraulic rods 51 extend synchronously, pushing the two straightening plates 52 on the left and right sides to move to both sides, so that the raised convex surface of the outer middle of the straightening plate 52 is pressed tightly against the inner wall of the engine mounting bracket 3. Through the synchronous pressing on both sides, the third support plate 53 is automatically aligned with the mounting bracket cavity. The third hydraulic rods 51 maintain pressure to achieve rigid locking and establish a precise positioning reference. Based on the relative position of the docking hole of the engine mounting bracket 3 and the positioning structure at the bottom of the engine, the two second hydraulic rods 46 are driven to extend and retract synchronously. The docking lug 45 drives the second support plate 41 to slide horizontally along the guide rail 43, adjusting the receiving component 2 to the preset centering position and compensating for the positional deviation when it is installed. According to the bottom width and slope angle of the ship engine 1 to be hoisted, the first hydraulic rod 24 is driven to extend and retract, which causes the limiting support plate 23 to swing around the hinge point between its lower end and the beam plate 25, and adjusts the upper width and tilt angle between the two limiting support plates 23 so that the inner slope matches the two sides of the bottom of the engine. The ship engine 1, which is being lifted by the gantry crane, is lowered above the flared openings of the two limiting support plates 23. The two limiting support plates 23 form an inverted V-shaped guide slope that is wider at the top and narrower at the bottom, so that the engine automatically centers along the slope during the lowering process, correcting the horizontal deviation caused by the steel cable lifting. As the ship engine 1 continues to be lowered, the positioning slopes on both sides of its bottom gradually come into contact with the inner slopes of the limiting support plate 23. The weight of the ship engine 1 is transferred from the two beam plates 25 to the lifting hydraulic rod 26 through the first support plate 21. By visual inspection or manual confirmation of the horizontal alignment of the mounting holes at the bottom of the engine with the docking holes of the mounting bracket, if there is a deviation, the second hydraulic rod 46 is driven to move the second support plate 41 horizontally along the guide rail 43 to achieve precise fine adjustment of the engine's horizontal position and make the docking holes aligned one by one. After horizontal alignment is completed, the piston rod of the lifting hydraulic rod 26 is retracted synchronously, which drives the beam plate 25, the limiting support plate 23 and the supported ship engine 1 to move down smoothly as a whole until the bottom mounting flange surface of the engine is completely in contact with the top mating surface of the engine mounting bracket 3, thus completing the precise docking. After the engine docking is completed, the first hydraulic rod 24 retracts, causing the limiting support plate 23 to swing outward and loosen. The third hydraulic rod 51 retracts, causing the straightening plate 52 to retract inward and detach from the inner wall of the mounting frame. Then, the entire auxiliary structure is rolled outward along the bottom of the mounting frame by the roller 55.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting and positioning auxiliary structure for heavy ship components, comprising a ship engine (1) and an engine mounting bracket (3), wherein the engine mounting bracket (3) is disposed on the ship for docking and installation of the ship engine (1), characterized in that, Also includes: Positioning component (5), the positioning component (5) is disposed inside the engine mounting bracket (3), and the outer wall of the positioning component (5) is in contact with the inner wall of the engine mounting bracket (3) to establish a positioning reference; Adjustment component (4), the adjustment component (4) is disposed on top of the positioning component (5); The receiving component (2) is installed on top of the adjusting component (4) and is used to receive the ship engine (1). The receiving component (2) includes lifting hydraulic rods (26) fixed at the top four corners of the adjusting component (4), and the four lifting hydraulic rods (26) are connected by a stabilizer (27). A beam plate (25) is installed at the top of the piston rod of each pair of lifting hydraulic rods (26), and the two beam plates (25) are connected by a first support plate (21). The top of the two beams (25) are symmetrically provided with limiting support plates (23). The two limiting support plates (23) are in the shape of an inverted "eight" shaped horn with a wider top and a narrower bottom, and their inner inclined surfaces are adapted to the two side positioning inclined surfaces at the bottom of the ship engine (1). In the initial state, the two limiting support plates (23) are higher than the top mating surface of the engine mounting bracket (3).

2. The auxiliary structure for lifting and positioning heavy ship components according to claim 1, characterized in that: The height difference between the support surfaces of the two limiting support plates (23) and the top mating surface of the engine mounting bracket (3) is greater than the vertical distance from the bottom flange surface of the marine engine (1) to its positioning ramp.

3. The auxiliary structure for lifting and positioning heavy ship components according to claim 1, characterized in that: The lifting hydraulic rod (26) is used to retract the beam plate (25), the limiting support plate (23) and the ship engine (1) to slowly move down until the bottom mounting flange of the ship engine (1) is in contact with the top mating surface of the engine mounting bracket (3) to complete the docking.

4. The auxiliary structure for lifting and positioning heavy ship components according to claim 1, characterized in that: The lower end of the limiting support plate (23) is hinged to the top of the beam plate (25), and a first hydraulic rod (24) is provided between the beam plate (25) and the limiting support plate (23). One end of the first hydraulic rod (24) is hinged to the limiting support plate (23), and the other end is hinged to the top of the beam plate (25).

5. The auxiliary structure for lifting and positioning heavy ship components according to claim 1, characterized in that: The top of the first support plate (21) is equipped with a lifting hook (22) for connecting to a lifting rope.

6. The auxiliary structure for lifting and positioning heavy ship components according to claim 1, characterized in that: The positioning component (5) includes a third support plate (53), which is embedded in the inner cavity of the engine mounting bracket (3). A mounting seat (54) is installed at the bottom of the third support plate (53), and a roller (55) is provided on the mounting seat (54).

7. The auxiliary structure for lifting and positioning heavy ship components according to claim 6, characterized in that: The four corners of the bottom of the third support plate (53) are equipped with third hydraulic rods (51), and the piston rods of the two third hydraulic rods (51) located on the same side of the third support plate (53) are jointly equipped with a straightening plate (52).

8. The auxiliary structure for lifting and positioning heavy ship components according to claim 7, characterized in that: The outer surface of the corrective plate (52) has a convex surface that bulges outward in the middle, and the two corrective plates (52) are located on the left and right sides of the third support plate (53), respectively. The outer end of the piston rod of the third hydraulic rod (51) is fixedly connected to the straightening plate (52), and the straightening plate (52) moves horizontally with the extension and retraction of the third hydraulic rod (51).

9. The auxiliary structure for lifting and positioning heavy ship components according to claim 6, characterized in that: The adjustment assembly (4) includes two guide rails (43) fixed to the top of the third support plate (53), and a second support plate (41) is slidably disposed on the guide rails (43) via a slider (42). The cylinder end of the lifting hydraulic rod (26) is fixed to the top of the second support plate (41).

10. The auxiliary structure for lifting and positioning heavy ship components according to claim 9, characterized in that: A rectangular through groove (44) is provided in the middle of the second support plate (41), and docking lugs (45) are fixed on the inner walls of both sides of the rectangular through groove (44). Two second hydraulic rods (46) are installed on the top of the third support plate (53). The piston rods of the two second hydraulic rods (46) are arranged horizontally in opposite directions, and the piston rod ends of the second hydraulic rods (46) are fixedly connected to the docking lugs (45).

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