Method and device for eliminating hull stress

Abstract

The present application relates to a method and device for eliminating stress on a hull, which is arranged on an output track and several vibration components in a dock; the stress of the hull is eliminated by vibration, and multiple vibration components are arranged between the output rollers of the output track below the hull. When the stress of the hull is eliminated, the vibration platform is driven to rise by a lifting motor until the vibration panel abuts the hull, and the operator starts the vibration motor. The vibration motors on multiple vibration components emit the same vibration frequency to better eliminate the stress of the hull. The vibration panel is composed of several hinged contact plates, which can better fit the hull when eliminating stress to achieve the elimination of hull stress. After the vibration component completes the stress elimination work on the hull, it can be reset by the lifting motor, so as not to affect the subsequent launching of the ship. This process does not require the operator to repeatedly install and disassemble the vibration component, which effectively reduces the labor intensity of the operator.

Description

Technical Field

[0001] The present application relates to the field of hull stress relief, and in particular to a hull stress relief method and device. Background Art

[0002] Ships are large welded structures with huge volume and heavy weight, some weighing tens of thousands of tons. Such structures are composed of crisscrossing ribs and have many welding parts. After welding, there are high and complex residual stresses, and stress concentration is prominent. Therefore, it is necessary to eliminate these residual stresses. However, the existing thermal aging and vibration aging methods are to perform stress relief treatment on the parts before the ship is built, and it is impossible to eliminate the residual stress of the complete hull. In the prior art, the stress relief method for the complete hull after construction is to install multiple vibrators on various parts of the hull, so as to eliminate the stress of the hull through vibration. However, this method requires the vibrators to be installed in multiple places on the hull. Not only is the installation process cumbersome, but if the vibrators are not firmly fixed, they are prone to positional displacement during vibration, thereby affecting the vibration effect on the hull. The use of complex fixing will also increase the labor intensity for workers. Summary of the Invention

[0003] In order to improve the effect of vibration stress relief, simplify the installation steps of the vibration device and reduce the labor intensity of the staff, the present application provides a hull stress relief method and device.

[0004] The present application provides a method and device for relieving hull stress using the following technical solutions:

[0005] A method and device for eliminating stress on a hull, comprising an output track and a plurality of vibration components arranged in a dock, wherein the output track is arranged below the hull, and a plurality of output rollers are arranged on the output track, and the output rollers are all rotatably connected to the output track; the vibration components are arranged at intervals between the output rollers, and the vibration components include a lifting motor, a first screw, a second screw, a lifting block and a vibration platform, the lifting motor is fixedly arranged below the output track, and the output shaft of the lifting motor is fixedly connected to a transmission shaft, and a first bevel gear and a second bevel gear are coaxially arranged on the transmission shaft, and the first screw and the second screw are both rotatably connected to the output track, The first screw and the second screw are parallel to each other, one end of the first screw is fixedly connected to the third bevel gear, one end of the second screw is fixedly connected to the fourth bevel gear, the first bevel gear is meshed with the third bevel gear, and the second bevel gear is meshed with the fourth bevel gear. The lifting block is threadedly connected to the first screw and the second screw, and the vibration platform is fixedly connected to the lifting block. A vibration motor is provided in the vibration platform. The rotation direction and vibration frequency of the vibration motor in each vibration platform are the same. The vibration platform is fixedly connected to a vibration panel via a spring, and the vibration panel includes a plurality of contact plates hinged to each other, and the contact plates can abut against the hull.

[0006] By adopting the above technical solution, multiple vibration components are set between the upper output rollers of the output track under the hull. When the hull is subjected to stress relief, the operator drives the vibration platform to rise through the lifting motor until the vibration panel abuts the hull. The operator starts the vibration motor, and the vibration motors on multiple vibration components emit the same vibration frequency to better relieve the stress of the hull. The vibration panel is composed of several hinged contact plates, which can better fit the hull to relieve the stress of the hull when eliminating stress. After the vibration component completes the stress relief work on the hull, it can be reset by the lifting motor, which will not affect the subsequent launching of the ship. This process no longer requires the operator to repeat the installation and disassembly work, effectively reducing the labor intensity of the operator.

[0007] Optionally, the dock is further provided with several auxiliary rods and several support assemblies, the auxiliary rods and the screw rods are parallel to each other, the vibration platform is slidably connected to the auxiliary rods, and the support assembly is arranged below the vibration platform, and the support assembly includes a driving motor, a mounting seat, a rotating rod, a support rod and a turntable, the driving motor and the mounting seat are fixedly arranged on the dock, the rotating rod is parallel to the length direction of the output track, the rotating rod is rotatably connected to the mounting seat, the output shaft of the driving motor is connected to the rotating rod through a coupling, the turntable is rotatably connected to the mounting seat, the turntable and the rotating rod are perpendicular to each other, and the end of the turntable away from the mounting seat is fixedly connected to a gear disk, and a protrusion that can engage all gear disks is circumferentially provided on the rotating rod, the support rod is threadedly connected to the turntable and the mounting seat, and the end of the support rod away from the mounting seat can abut the vibration platform.

[0008] By adopting the above technical solution, the auxiliary rod and the screw rod cooperate with each other to improve the stability of the vibration platform. Before vibrating the hull to eliminate stress, the operator can start the drive motor to drive the rotating rod to rotate, so that the turntable engaged with the rotating rod rotates. When the turntable rotates, the support rod rises vertically until it abuts the vibration platform, thereby supporting the vibration platform and improving the stability and reliability of the vibration platform during operation.

[0009] Optionally, one end of the support rod away from the mounting seat is connected to a support plate, the support plate is slidably connected to the auxiliary rod, and a buffer plate is provided on one side of the support plate away from the mounting seat, and the buffer plate can abut against the vibration platform.

[0010] By adopting the above technical solution, the support rod abuts the vibration platform through the support plate, increasing the contact area and improving the stability of the support. The buffer plate can reduce the impact on the support assembly when the vibration assembly is working, thereby improving the reliability of the support assembly structure.

[0011] Optionally, a number of auxiliary vehicles are provided in the dock, and the auxiliary vehicles include a base, a limiting plate, an escalator, and an abutment cover. The escalator includes a fixed ladder and a rotating ladder. The fixed ladder is fixedly provided on the base, and the rotating ladder is rotatably connected to the base via a rotating shaft. The abutment cover is provided at the end of the rotating ladder away from the base, and the abutment cover is in the shape of a suction cup and can be adsorbed on the hull. A number of limiting rails are provided in the dock, and a number of identical slots are provided in the limiting rails along the length direction thereof, and the spacing between adjacent slots is equal. The limiting plate is rotatably connected to the base, and the limiting plate can be embedded in the slot.

[0012] By adopting the above technical solution, the auxiliary vehicle can support the hull by rotating the abutment cover on the escalator, thereby preventing the hull from tilting when undergoing vibration stress relief treatment. The limiting plate can be embedded in the slot and supported by the slot to fix the position of the auxiliary vehicle, so that it can abut the hull more firmly.

[0013] Optionally, one end of the rotating shaft is fixedly connected to a driven gear, and a transmission gear is rotatably connected to the base, and the transmission gear is engaged with the driven gear. The base is also provided with a forward and reverse motor that can drive the transmission gear to rotate, and the base is also provided with a fixing ring, and a fixing claw that can hook the fixing ring is provided in the dock.

[0014] By adopting the above technical solution, the forward and reverse motor drives the gear transmission to drive the escalator to adjust the angle, which can reduce the labor intensity of workers and improve work efficiency. Workers can fix the auxiliary vehicle by hooking the fixing ring with the fixing claw.

[0015] Optionally, a plurality of limiting grooves are provided in the dock, and the wheels of the auxiliary vehicle are rollingly connected to the limiting grooves.

[0016] By adopting the above technical solution, the limiting groove can limit the wheels of the auxiliary vehicle, making it less likely for the wheels to deviate, which is beneficial to improving the stability of the auxiliary vehicle.

[0017] Optionally, top rails are provided at both ends of the output rail, and the end of the top rail away from the hull is rotatably connected to the output rail. The top rail is hinged with a lifting rod, and the end of the lifting rod away from the hinged end is connected to a running trolley. The running trolley is driven by a motor and can move along the output rail, and the end of the top rail away from the hinged end is provided with a top block, and the top block can abut against the hull.

[0018] By adopting the above technical solution, before the vibration eliminates stress, the running trolley is started to lift the top rail, and the top block on the top rail can support the hull to prevent the hull from sliding back and forth when the vibration eliminates stress.

[0019] Optionally, the top block is V-shaped, a buffer pad is provided on a side of the top block close to the hull, and a plurality of grooves are provided on the surface of the buffer pad.

[0020] By adopting the above technical solution, the V-shaped top block can better fit the front and rear ends of the hull, and the water vapor can be discharged from the grooves through the grooves opened on the buffer pad. This not only prevents the salty water vapor from the seaside from accumulating between the buffer pad and the hull and corroding the unpainted hull, but also increases the friction between the top block and the hull.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. Multiple vibration assemblies are placed between the upper output rollers of the output track below the hull. When stress relief is performed on the hull, the operator drives the vibration platform up through the lifting motor until the vibration panel abuts the hull. The operator then starts the vibration motor. The vibration motors on multiple vibration assemblies emit the same vibration frequency to better relieve stress on the hull. The vibration panel is composed of several hinged contact plates, which can better fit the hull during stress relief. After the vibration assembly completes the stress relief work on the hull, it can be reset through the lifting motor without affecting the subsequent launching of the ship. This process eliminates the need for the operator to repeatedly install and disassemble, effectively reducing the operator's labor intensity.

[0023] 2. The auxiliary rod and the screw rod cooperate with each other to improve the stability of the vibration platform. Before vibrating the hull to eliminate stress, the operator can start the drive motor to rotate the rotating rod, so that the turntable engaged with the rotating rod rotates. When the turntable rotates, the support rod rises vertically until it contacts the vibration platform, thereby supporting the vibration platform and improving the stability and reliability of the vibration platform during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram showing the overall structure of this application.

[0025] Figure 2 This is a structural diagram showing the vibration component and support component of this application.

[0026] Figure 3 It is a structural diagram showing the position of the turntable in this application.

[0027] Figure 4 It is a structural diagram of the auxiliary vehicle displayed in this application.

[0028] Figure 5 It is a structural diagram of the top rail display of this application.

[0029] Explanation of reference numerals: 1. dock; 11. output rail; 111. output roller; 12. hull; 13. fixing claw; 14. limiting groove; 2. vibration assembly; 21. lifting motor; 22. first screw; 221. third bevel gear; 23. second screw; 231. fourth bevel gear; 24. lifting block; 25. vibration platform; 251. vibration motor; 252. spring; 253. vibration panel; 2531. contact plate; 26. transmission shaft; 261. first bevel gear; 262. second bevel gear; 3. auxiliary rod; 4. support assembly; 41. drive motor; 42 , mounting seat; 43, rotating rod; 431, protrusion; 44, supporting rod; 441, supporting plate; 4411, buffer plate; 45, turntable; 451, gear plate; 5, auxiliary vehicle; 51, base; 52, limiting plate; 53, escalator; 531, fixed ladder; 532, rotating ladder; 54, abutment cover; 55, rotating shaft; 551, driven gear; 56, transmission gear; 57, forward and reverse motor; 58, fixing ring; 6, limiting track; 61, slot; 7, top rail; 71, lifting rod; 72, running trolley; 73, top block; 731, buffer pad; 7311, groove. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The embodiments of the present application disclose a method and device for relieving hull stress.

[0032] Reference Figure 1 and Figure 2 A method and device for eliminating hull stress includes an output track 11 and a plurality of vibration components 2 arranged in a dock 1. The output track 11 is arranged below the hull 12. A plurality of output rollers 111 are provided on the output track 11. The output rollers 111 are all rotatably connected to the output track 11. The output track 11 is used for launching the ship after construction is completed.

[0033] Reference Figure 2 and Figure 3The vibration assembly 2 is spaced between the output rollers 111. The vibration assembly 2 includes a lifting motor 21, a first screw 22, a second screw 23, a lifting block 24, and a vibration platform 25. The lifting motor 21 is fixedly arranged below the output track 11. The output shaft of the lifting motor 21 is fixedly connected to the transmission shaft 26. The transmission shaft 26 is coaxially provided with a first bevel gear 261 and a second bevel gear 262. The first screw 22 and the second screw 23 are both rotatably connected to the output pipe. The first screw 22 and the second screw 23 are parallel to each other. One end of the first screw 22 is fixedly connected to the third bevel gear 221, and one end of the second screw 23 is fixedly connected to the fourth bevel gear 231. The first bevel gear 261 is meshed with the third bevel gear 221, and the second bevel gear 262 is meshed with the fourth bevel gear 231. The lifting block 24 is threadedly connected to the first screw 22 and the second screw 23, and the vibration platform 25 is fixedly connected to the lifting block 24. The lifting motor 21 drives the transmission shaft 26 to rotate, and drives the first screw 22 and the second screw 23 to rotate synchronously through the meshing transmission between the gears. At this time, the lifting block 24 can be lifted and lowered on the screw as the screw rotates.

[0034] like Figure 2 and Figure 3 As shown, the vibration platform 25 is fixedly connected to the lifting block 24, so that it can be moved in the vertical direction by the lifting block 24. A vibration motor 251 is provided in the vibration platform 25. The rotation direction and vibration frequency of the vibration motor 251 in each vibration platform 25 are the same. Multiple vibration motors 251 vibrate simultaneously, continuously eliminating the stress of the hull 12 within a set time. When the hull 12 needs to be stress-relieved, the lifting motor 21 is started to rotate forward and the vibration platform 25 is driven vertically by the lifting block 24 until the vibration platform 25 abuts the hull 12. When the stress relief is completed, the operator starts the lifting motor 21 in the reverse direction to lower the vibration platform 25. There is no need for the operator to install and remove it, which can effectively reduce the operator's labor intensity and can be used repeatedly.

[0035] The vibration platform 25 is fixedly connected to a vibration panel 253 on the side closest to the hull 12 via a spring 252. The vibration panel 253 includes several hinged contact plates 2531. The side of the contact plates 2531 away from the vibration platform 25 can abut the hull 12. Because the hull 12 has a variety of shapes, some with flat bottoms and others with curved bottoms, the vibration panel 253 is divided into several hinged contact plates 2531 and connected to the vibration platform 25 via springs 252. This allows the vibration panel 253 to better adhere to the hull 12, thereby better transmitting vibration to the hull 12 and improving the efficiency of stress relief.

[0036] Reference Figure 2 and Figure 3A plurality of auxiliary rods 3 and a plurality of supporting assemblies 4 are also provided in the dock 1. The auxiliary rods 3 are all fixedly provided on the central axis in the length direction of the output track 11. The auxiliary rods 3 and the screw rods are parallel to each other. The vibration platform 25 is slidably connected to the auxiliary rods 3. When the vibration platform 25 vibrates the hull 12 to eliminate stress, the vibration platform 25 may be fixed only by the lifting block 24, which may cause the stability of the vibration platform 25 to be poor. The cooperation between the auxiliary rods 3 and the screw rods can improve the stability of the vibration platform 25.

[0037] The support assembly 4 is arranged below the vibration platform 25, and the support assembly 4 includes a drive motor 41, a mounting seat 42, a rotating rod 43, a support rod 44 and a turntable 45. The drive motor 41 and the mounting seat 42 are fixed to the dock 1 by bolts, and the mounting seat 42 is arranged below the vibration platform 25. The rotating rod 43 is parallel to the length direction of the output track 11, and the rotating rod 43 is rotatably connected to the mounting seat 42. The output shaft of the drive motor 41 is connected to the rotating rod 43 through a coupling, and the turntable 45 is rotatably connected to the mounting seat 42. The turntable 45 and the rotating rod 43 are perpendicular to each other. The end of the turntable 45 away from the mounting seat 42 is fixedly connected to the gear disk 451, and a protrusion 431 that can engage all the gear disks 451 is circumferentially provided on the rotating rod 43. The support rod 44 is threadedly connected to the turntable 45 and the mounting seat 42, and the end of the support rod 44 away from the mounting seat 42 can abut the vibration platform 25. Before vibrating the hull 12 to eliminate stress, the drive motor 41 is started to drive the rotating rod 43 to rotate, so that the turntable 45 engaged with the rotating rod 43 rotates. When the turntable 45 rotates, the support rod 44 moves vertically upward until it abuts the vibration platform 25, thereby supporting the vibration platform 25 and improving the stability and reliability of the vibration platform 25 during operation.

[0038] The end of the support rod 44 away from the mounting base 42 is connected to a support plate 441, which is slidably connected to the auxiliary rod 3. A buffer plate 4411 is provided on the side of the support plate 441 away from the mounting base 42. The buffer plate 4411 can abut the vibration platform 25. The support rod 44 abuts the vibration platform 25 through the support plate 441, increasing the contact area and improving support stability. The buffer plate 4411 can reduce the impact on the support assembly 4 during the operation of the vibration assembly 2, thereby improving the structural reliability of the support assembly 4.

[0039] Reference Figure 4Several auxiliary vehicles 5 are installed in the dock 1. The auxiliary vehicles 5 are installed on both sides of the hull 12. The auxiliary vehicles 5 include a base 51, a limiting plate 52, an escalator 53, and an abutment cover 54. The escalator 53 includes a fixed ladder 531 and a rotating ladder 532. The fixed ladder 531 is fixed to the base 51 at an acute angle to the horizontal plane. The rotating ladder 532 is rotatably connected to the base 51 via a rotating shaft 55. The abutment cover 54 is provided at the end of the rotating ladder 532 away from the base 51. The abutment cover 54 is shaped like a suction cup and can be attached to the hull 12. The auxiliary vehicle 5 can support the hull 12 through the abutment cover 54 on the rotating ladder 532, thereby preventing the hull 12 from tilting during the vibration stress relief treatment. A plurality of limiting rails 6 are provided in the dock 1, and a plurality of identical slots 61 are provided in the limiting rails 6 along the length direction thereof. The spacing between adjacent slots 61 is equal. The limiting plates 52 are rotatably connected to the two ends of the base 51. The limiting plates 52 can be embedded in the slots 61. The slots 61 support the limiting plates 52 to fix the position of the auxiliary vehicle 5, so that the auxiliary vehicle 5 can be more firmly against the hull 12.

[0040] A driven gear 551 is fixedly connected to one end of the rotating shaft 55. A transmission gear 56 is rotatably connected to the base 51 and meshes with the driven gear 551. The base 51 is also equipped with a forward and reverse motor 57 that drives the transmission gear 56. The forward and reverse motor 57 drives the gear transmission, thereby driving the rotating ladder 532 to adjust its angle, reducing labor intensity and improving work efficiency. The base 51 is also equipped with a fixing ring 58. A fixing claw 13 is provided within the dock 1 to hook onto the fixing ring 58. When idle, the auxiliary vehicle 5 can be moved to the area where the fixing claw 13 is located. The operator can secure the auxiliary vehicle 5 by hooking the fixing claw 13 onto the fixing ring 58. Several restraining grooves 14 are provided within the dock 1. The wheels of the auxiliary vehicle 5 are rollingly connected within the restraining grooves 14. The restraining grooves 14 restrain the wheels of the auxiliary vehicle 5, preventing wheel deviation and improving the stability of the auxiliary vehicle 5.

[0041] like Figure 1 and Figure 5As shown, top rails 7 are provided at both ends of the output track 11. The end of the top rail 7 away from the hull 12 is rotatably connected to the output track 11. The top rail 7 is hinged with a lifting rod 71. The end of the lifting rod 71 away from the hinged end is connected to a running trolley 72. The running trolley 72 is driven by a motor and can move along the output track 11. The end of the top rail 7 away from the hinged end is provided with a top block 73, which can abut the hull 12. Before the vibration stress is eliminated, the running trolley 72 is started to lift the top rail 7. The top block 73 on the top rail 7 can abut the hull 12 to prevent the hull 12 from sliding back and forth during the vibration stress elimination. The top block 73 is V-shaped, and a buffer pad 731 is provided on the side of the top block 73 close to the hull 12. The surface of the buffer pad 731 is provided with a plurality of grooves 7311. The V-shaped top block 73 can better fit the front and rear ends of the hull 12. The grooves 7311 opened on the buffer pad 731 can guide water vapor out of the grooves 7311, which can not only prevent the salt vapor at the seaside from corroding the unpainted hull 12, but also increase the friction between the top block 73 and the hull 12.

[0042] The implementation principle of a hull stress relief method and device according to an embodiment of the present application is as follows: stress is relieved on the hull 12 by vibration relief. Multiple vibration assemblies 2 are arranged between the output rollers of the output track 11 below the hull 12. When stress relief is required on the hull 12, the vibration platform 25 is driven upward by the lifting motor 21 until the vibration panel 253 contacts the hull 12. The operator then activates the vibration motor 251. The vibration motors 251 on the multiple vibration assemblies 2 emit the same vibration frequency, thereby better relieving stress on the hull 12. The vibration panel 253 is composed of a plurality of hinged contact plates 2531, so that it can better fit the hull 12 during the vibration relief process to achieve stress relief on the hull 12. After the vibration assembly 2 completes the stress relief work on the hull 12, it can continue to be reset by the lifting motor 21, thereby not affecting the subsequent launching of the ship. This process eliminates the need for the operator to repeat the installation and disassembly work, effectively reducing the operator's labor intensity.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A hull stress relief device, characterized in that: The invention comprises an output track (11) and a plurality of vibration components (2) arranged in a dock (1), wherein the output track (11) is arranged below a hull (12), and a plurality of output rollers (111) are arranged on the output track (11), and the output rollers (111) are all rotatably connected to the output track (11); the vibration components (2) are arranged at intervals between the output rollers (111), and the vibration components (2) comprise a lifting motor (21), a first screw (22), a second screw (23), a lifting block (24) and a vibration platform (25); the lifting motor (21) is fixedly arranged below the output track (11), and the output shaft of the lifting motor (21) is fixedly connected to a transmission shaft (26), and a first bevel gear (261) and a second bevel gear (262) are coaxially arranged on the transmission shaft (26); the first screw (22) and the second screw (23) are both rotatably connected to the output track (11), and the first screw (22) and the second screw (23) are The screw rods (23) are parallel to each other. One end of the first screw rod (22) is fixedly connected to the third bevel gear (221). One end of the second screw rod (23) is fixedly connected to the fourth bevel gear (231). The first bevel gear (261) is meshed with the third bevel gear (221). The second bevel gear (262) is meshed with the fourth bevel gear (231). The lifting block (24) is threadedly connected to the first screw rod (22) and the second screw rod (23). The vibration platform (25) is fixedly connected to the lifting block (24). A vibration motor (251) is provided in the vibration platform (25). The rotation direction and vibration frequency of the vibration motor (251) in each vibration platform (25) are the same. The vibration platform (25) is fixedly connected to a vibration panel (253) via a spring (252). The vibration panel (253) includes a plurality of contact plates (2531) hinged to each other. The contact plates (2531) can abut against the hull (12).The dock (1) is further provided with a plurality of auxiliary rods (3) and a plurality of support assemblies (4), wherein the auxiliary rods (3) and the screw rods are parallel to each other, the vibration platform (25) is slidably connected to the auxiliary rods (3), the support assembly (4) is arranged below the vibration platform (25), the support assembly (4) comprises a driving motor (41), a mounting seat (42), a rotating rod (43), a support rod (44) and a turntable (45), the driving motor (41) and the mounting seat (42) are fixedly arranged on the dock (1), the rotating rod (43) is parallel to the length direction of the output track (11), the rotating rod (43) is rotatably connected to the mounting seat (42), the output shaft of the driving motor (41) is connected to the rotating rod (43) through a coupling, and the turntable (45) is rotatably connected to the mounting seat (42). The rotating disk (45) and the rotating rod (43) are perpendicular to each other. The end of the rotating disk (45) away from the mounting seat (42) is fixedly connected to a gear plate (451). The rotating rod (43) is circumferentially provided with a protrusion (431) capable of engaging with all the gear plates (451). The supporting rod (44) is threadedly connected to the rotating disk (45) and the mounting seat (42). The end of the supporting rod (44) away from the mounting seat (42) can abut against the vibration platform (25); the end of the supporting rod (44) away from the mounting seat (42) is connected to a supporting plate (441). The supporting plate (441) is slidably connected to the auxiliary rod (3). A buffer plate (4411) is provided on the side of the supporting plate (441) away from the mounting seat (42). The buffer plate (4411) can abut against the vibration platform (25).

2. A hull stress relief device according to claim 1, characterized in that: The dock (1) is provided with a plurality of auxiliary vehicles (5), the auxiliary vehicles (5) comprising a base (51), a limiting plate (52), an escalator (53), and an abutment cover (54), the escalator (53) comprising a fixed ladder (531) and a rotating ladder (532), the fixed ladder (531) being fixedly provided on the base (51), the rotating ladder (532) being rotatably connected to the base (51) via a rotating shaft (55), the abutment cover (54) being provided at one end of the rotating ladder (532) away from the base (51), the abutment cover (54) being in the shape of a suction cup and capable of being adsorbed on the hull (12), the dock (1) being provided with a plurality of limiting rails (6), the limiting rails (6) being provided with a plurality of identical card slots (61) along their length direction, the spacing between adjacent card slots (61) being equal, the limiting plate (52) being rotatably connected to the base (51), the limiting plate (52) being capable of being embedded in the card slot (61).

3. A hull stress relief device according to claim 2, characterized in that: One end of the rotating shaft (55) is fixedly connected to a driven gear (551), and a transmission gear (56) is rotatably connected to the base (51). The transmission gear (56) is meshed with the driven gear (551). The base (51) is also provided with a forward and reverse motor (57) capable of driving the transmission gear (56) to rotate. The base (51) is also provided with a fixing ring (58), and a fixing claw (13) capable of hooking the fixing ring (58) is provided in the dock (1).

4. A hull stress relief device according to claim 2, characterized in that: A plurality of limiting grooves (14) are provided in the dock (1), and the wheels of the auxiliary vehicle (5) are rollingly connected in the limiting grooves (14).

5. The hull stress relief device according to claim 1, characterized in that: Both ends of the output track (11) are provided with top rails (7), one end of the top rail (7) away from the hull (12) is rotatably connected to the output track (11), the top rail (7) is hinged with a lifting rod (71), the end of the lifting rod (71) away from the hinged end is connected to a running trolley (72), the running trolley (72) is driven by a motor and can move along the output track (11), the end of the top rail (7) away from the hinged end is provided with a top block (73), and the top block (73) can abut against the hull (12).

6. A hull stress relief device according to claim 5, characterized in that: The top block (73) is V-shaped, and a buffer pad (731) is provided on one side of the top block (73) close to the hull (12), and a plurality of grooves (7311) are provided on the surface of the buffer pad (731).

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