A detachable buoyancy device for recovering offshore experimental measurement data

Abstract

The present invention discloses a detachable buoyancy device for recovering data from offshore experimental measurements, which belongs to the technical field of offshore salvage and recovery devices. The device comprises a carrying box and a vibration isolation and buffering module arranged at the bottom of the carrying box. A box front cover is provided on one side of the carrying box, and an annular rubber sealing ring is provided between the carrying box and the box front cover. A lifting ring is provided on the box front cover, and a Beidou positioning device is connected to the lifting ring via a flexible rope. A mechanical automatic cutting module is provided on the outer wall of the carrying box. A data acquisition device is provided inside the carrying box, and a measuring wire is connected to the data acquisition device. The measuring wire passes through the carrying box and is connected to a measuring sensor via the mechanical automatic cutting module. The data acquisition device is connected to the carrying box via an installation mechanism. The present invention adopts the above structure and has the characteristics of positive buoyancy, vibration isolation and buffering, automatic cutting and unlocking, waterproof sealing, and real-time positioning.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore salvage and recovery devices, and in particular to a detachable buoyancy device for recovering offshore experimental measurement data. Background Art

[0002] In recent years, my country's shipbuilding technology and delivery rates have been continuously improving. In the civilian shipbuilding sector, taking liquefied natural gas (LNG) carriers as an example, 89 LNG carriers will be delivered in 2024, more than double the 10-year average and a 48% increase from the 10.1 million cubic meters delivered three years ago. 2025 is also forecast to be a year of very stable deliveries, with an initial estimate of 14.5 million cubic meters of ships being launched. In the military ship sector, taking the Type 052D destroyer as an example, 25 have been delivered to frontline units in recent years. This intensive delivery schedule places high demands on all stages of work, including hull structural design, manufacturing and outfitting, and sea trials and verification. During the sea trials phase, significantly improving the reliable recovery of test data is crucial. Therefore, consideration must be given to how to safely recover test data in extreme situations, such as when the hull is damaged and sinking under severe sea conditions and high external loads.

[0003] Taking military ship sea trials as an example, foreign navies have long conducted extensive full-ship trials and floating shock platform tests. The US Navy conducted hull explosion resistance tests as early as 1860. The British Navy conducted the first full-scale underwater explosion test in the Stoke Sea in 1874. In 1946, the United States conducted extensive full-ship underwater explosion tests in the Pacific using captured Axis warships. Furthermore, the United States has been continuously conducting full-ship explosion tests in recent years, deploying over 1,000 and 600 measurement points on Seawolf-class nuclear submarines and Arleigh Burke-class destroyers, respectively, to obtain extensive data from full-ship underwater explosion tests. Similarly, European navies also attach great importance to full-ship testing and research, with NATO typically conducting full-ship tests every two to three years. As early as 1972, the Swedish Navy conducted underwater explosion shock tests on submarine compartments, employing 47 acceleration measurement channels, 12 pressure measurement channels, and 19 strain measurement channels. In 1996, the Dutch Navy conducted the Troika shock test, employing 28 acceleration measurement channels, 2 pressure measurement channels, and 25 strain measurement channels. Compared to traditional naval powers in Europe and the United States, Asian navies are also actively conducting full-ship underwater explosion shock tests. The South Korean Navy's MSH full-ship test in 2000 employed a specially developed 200-channel measurement system with a data acquisition frequency of up to 200kHz. High-speed cameras operating at 1000 frames per second were used for photography, and data was recorded digitally for storage, resulting in a large amount of first-hand raw data from the full-ship test. After the test, facing this massive amount of digital test data, the naval colleagues from various countries faced the technical challenge of reliably and securely recovering the raw data in the event of a tilt or sinking of the ship structure.

[0004] my country entered the field of full-scale ship testing relatively late, and the only relevant tests conducted primarily focused on static target ships, which still differed significantly from real-world conditions. To further meet the country's requirements for combat readiness, the existing "static" measurement system needs to be supplemented and improved, especially with regard to the offshore salvage and recovery device, which houses the data acquisition and storage equipment of the test acquisition system during dynamic testing. In harsh sea conditions, the reliability of the salvage and recovery device determines whether valuable test data can be safely recovered. Therefore, there is an urgent need to develop a safe and reliable salvage and recovery device to facilitate the effective and smooth conduct of full-scale ship dynamic testing and provide strong technical support for my country's marine equipment technology research. Summary of the Invention

[0005] The purpose of the present invention is to provide a detachable buoyancy device for recovering offshore experimental measurement data, which can realize functions such as positive buoyancy floating, vibration isolation and buffering, automatic cutting and unlocking, waterproof sealing and real-time positioning.

[0006] To achieve the above-mentioned objectives, the present invention provides a detachable buoyancy device for recovering data from offshore experimental measurements, comprising a carrying box and a vibration isolation and buffer module arranged at the bottom of the carrying box, a box front cover is provided on one side of the carrying box, and an annular rubber sealing ring is provided between the carrying box and the box front cover, a lifting ring is provided on the box front cover, and a Beidou positioning device is connected to the lifting ring through a flexible rope, a mechanical automatic cutting module is provided on the outer wall of the carrying box, a data acquisition device is provided inside the carrying box, a measuring wire is connected to the data acquisition device, the measuring wire passes through the carrying box and is connected to the mechanical automatic cutting module with a measuring sensor, and the data acquisition device is connected to the carrying box through an installation mechanism.

[0007] Preferably, the vibration isolation and buffer module includes a box base arranged at the bottom of the carrying box and connected to the carrying box through a support plate. The bottom of the box base is connected to a bottom plate through a double-stage steel wire vibration isolator. A reinforcement plate is arranged on the support plate. A lifting ring is arranged on the box base and on one side of the support plate.

[0008] Preferably, the Beidou positioning device includes an upper protective cover, a lower protective cover and an equipment mounting plate arranged between the upper protective cover and the lower protective cover. A buffer foam block is arranged between the equipment mounting plate and the upper protective cover. A cavity is arranged on the buffer foam block. A Beidou positioning device is arranged in the cavity. Beidou rubber sealing pads are arranged between the equipment mounting plate and the upper protective cover and the lower protective cover.

[0009] Preferably, a through hole six is ​​provided at the bottom of the lower protective cover, a Beidou lifting ring is connected to the through hole six via a nut and a gasket, and a lifting ring rubber sealing gasket is provided between the gasket and the lower protective cover.

[0010] Preferably, the mechanical automatic cutting module includes a wire plate installation window, which is arranged on one side of the carrying box body, and a rubber sealing gasket and a porous wire threading plate are sequentially arranged on the side of the wire plate installation window away from the carrying box body, and a box body cutting plate installation block is arranged above the wire plate installation window, and a wire cutting plate and a wire pressing plate are sequentially arranged on the side of the box body cutting plate installation block away from the carrying box body, and protrusions are provided at both ends of the wire pressing plate.

[0011] Preferably, the rubber sealing gasket and the porous wire threading plate are respectively provided with openings and wire holes for the measurement wire to pass through. The wire hole close to the side of the supporting box is sealed by vacuum sealing mud and silicone filling. Two wire fixing plates are provided on the end of the measuring wire close to the measuring sensor. A rubber pad is provided between the two wire fixing plates. The measuring wire passes through between the two rubber pads and is compacted and fixed.

[0012] Preferably, the installation mechanism includes installation platform one and installation platform two, the data acquisition device is arranged on the top of installation platform one, and cushioning foam pads are provided on all sides and the top of the installation platform. A mounting strip is provided above the cushioning foam pad for fixing the data acquisition device on installation platform one, and device limit blocks are provided on both sides of the data acquisition device.

[0013] Preferably, the first mounting platform and the second mounting platform are respectively connected to a first mounting block and a second mounting block provided inside the bearing box, and reinforcing ribs are provided on the outer side wall of the bearing box in both axial and radial directions.

[0014] Preferably, the upper protective cover, the lower protective cover and the mounting plate are all made of polytetrafluoroethylene plastic material.

[0015] Therefore, the present invention adopts a detachable buoyancy device of the above structure for recovering data from offshore experimental measurements. During offshore experiments on the hull structure, the vibration isolation and buffering module can protect the collection equipment to prevent it from malfunctioning or being damaged due to strong impact; the mechanical automatic cutting module can cut the connecting cable between the salvage and recovery device and the hull, so that the recovery device floats to the water surface under the action of its own positive buoyancy; a variety of sealing components can prevent seawater from seeping into the recovery device, ensuring the safety of the collection equipment; the Beidou positioning device can dynamically display the precise position of the recovery device at sea in real time, so that the salvage personnel can accurately locate and facilitate the salvage of the recovery device.

[0016] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the carrying box of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the annular rubber sealing ring on the carrying box of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the front cover of the box body of the present invention;

[0021] Figure 5 This is a schematic structural diagram of the double-stage steel wire vibration isolator of the present invention;

[0022] Figure 6 This is a schematic diagram of the bottom plate structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the mechanical automatic cutting module of the present invention;

[0024] Figure 8This is a schematic diagram of the structure of the porous threading plate of the present invention;

[0025] Figure 9 This is a schematic diagram of the structure of the secant plate of the present invention;

[0026] Figure 10 This is a structural schematic diagram of the wire pressing plate of the present invention;

[0027] Figure 11 This is a schematic structural diagram of the wire fixing plate of the present invention;

[0028] Figure 12 This is a schematic diagram of the structure of the rubber sealing gasket of the present invention;

[0029] Figure 13 This is a schematic diagram of the assembly of the data acquisition device and the installation mechanism of the present invention;

[0030] Figure 14 This is a schematic diagram of installing layering strips according to the present invention;

[0031] Figure 15 This is a schematic diagram of the installation platform of the present invention;

[0032] Figure 16 This is a schematic diagram of the assembly of the Beidou positioning device of the present invention;

[0033] Figure 17 This is a schematic cross-sectional view of a buffer foam block according to the present invention;

[0034] Figure 18 This is a schematic diagram of the structure of the upper protective cover of the present invention;

[0035] Figure 19 This is a schematic diagram of the installation plate of the device of the present invention;

[0036] Figure 20 Schematic cross-sectional view of the lower protective cover of the present invention;

[0037] Figure 21 This is a schematic diagram of the Beidou hanging ring of the present invention;

[0038] Figure 22 This is a schematic diagram of the rubber sealing gasket of the lifting ring of the present invention;

[0039] Reference numerals

[0040] 1. Carrying box; 2. Annular rubber seal; 3. Beidou positioning device; 4. Flexible rope; 5. Box front cover; 6. Double-stage steel wire isolator; 7. Bottom plate; 8. Rubber seal; 9. Measuring wire; 10. Wire fixing plate; 11. Multi-hole threading plate; 12. Wire cutting plate; 13. Wire pressing plate; 14. Reinforcement rib; 15. First mounting block; 16. Second mounting block; 17. Box base; 18. Lifting ring; 19. Reinforcement plate; 20. Support plate; 21. Wire plate mounting window; 22. Box Wire cutting plate mounting block; 23. Mounting platform 1; 24. Data acquisition equipment; 25. Mounting strip; 26. Buffer foam pad; 27. Pass Hole one; 28. Equipment limit block; 29. ​​Through hole two; 30. Mounting platform two; 31. Lifting ring; 32. Through hole three; 33. Through hole four; 34. Bump; 35. Through hole five; 36. Wire hole; 37. Opening; 38. Upper protective cover; 39. Beidou positioning device; 40. Buffer foam block; 41. Beidou rubber sealing gasket; 42. Nut; 43. Gasket; 44. Beidou lifting ring; 45. Lifting ring rubber sealing gasket; 46. Lower protective cover; 47. Equipment mounting plate; 48. Cavity; 49. Through hole six; 50. Vacuum seal; 51. Silicone; 52. Rubber pad; 53. Measuring sensor; 54. Through hole seven; 55. Through hole eight. DETAILED DESCRIPTION

[0041] Example

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] A detachable buoyancy device for recovering data from offshore experimental measurements. The recovery device is installed on the side of the main deck of the target ship, and ensures that there are no other obstructions around the installation location. The overall assembly structure of the recovery device is as follows: Figure 1 Its main structure, that is, the carrying box 1 is a thin-walled cylindrical tube, as shown. Figure 2 As shown, it is in a positive buoyancy state when fully loaded, that is, it always floats on the water surface and will not sink. The front cover 5 of the box body is connected to the supporting box body 1 by bolts. In order to ensure the watertightness of the box body structure, there is a Figure 3 The annular rubber seal 2 is shown. The Beidou positioning device 3 is connected to the Figure 4The lifting ring 31 of the front cover 5 of the middle box is connected so that the Beidou positioning device 3 can float to the sea surface without constraints in any state, ensuring the smooth flow of Beidou communication signals. In order to improve the impact resistance of the recovery device, the supporting box 1 is connected to the double-stage steel wire isolator 6 by bolts. In order to ensure the stability of the support and avoid the supporting box 1 tilting to one side when it is shaken due to the double-stage steel wire isolator 6 being too high, the double-stage steel wire isolators 6 (two layers, a total of eight) are staggered. Figure 5 The installation directions of any two adjacent double-stage steel wire isolators 6 shown are perpendicular to each other. Figure 6 The middle bottom plate 7 is connected, and the recovery device is finally placed on the main deck of the target hull.

[0044] The principle of mechanical automatic cutting module is as follows Figure 7 As shown, during the measurement test, the data acquisition device 24 is installed in the carrying box 1, and its measuring wire 9 is led out from the carrying box 1 through the wire plate installation window 21 and the multi-hole wire plate 11. Figure 8 As shown, the measuring wire 9 then passes through the box secant plate mounting block 22 and Figure 9 The gap between the cutting plates 12 with blades is shown, and the cutting plates 12 are tightly pressed and cannot move. Then the measuring wire 9 passes through the cutting plates 12 and the cutting plates 12 in the reverse direction. Figure 10 The larger gap between the wire pressing plates 13 shown here, where the measuring wire 9 is in a loose state. Then the measuring wire 9 passes through the two pieces of metal near the carrying box 1. Figure 11 The gap between the fixing plates 10 shown is filled and tightly compressed by them, and the two fixing plates 10 are fixed to the main deck of the target hull. Finally, the measuring wire 9 is connected to the measuring sensor 53 at the far end of the target hull. To prevent the measuring wire 9 from being damaged by excessive compression, a rubber pad 52 is provided between the two fixing plates 10. When the test is completed, the target hull will tilt and sink, eventually causing the recovery device to fall into the sea. At this time, the recovery device will be affected by its own upward buoyancy. At the same time, because the measuring wire 9 is tightly fixed to the main deck of the target hull by the fixing plates 10, the recovery device will also be affected by the downward drag force transmitted through the measuring wire 9 due to the sinking of the target hull, and this downward drag force is far greater than the upward buoyancy of the recovery device itself. Because the measuring wire 9 is fixed at the secant plate 12, the measuring wire 9 is wound in opposite directions around the secant plate 12 and the pressure plate 13. Therefore, when the force is transmitted along the measuring wire 9 to the secant plate 12, the measuring wire 9 will be tightened and pressed against the sharp edge of the secant plate 12. Under the action of the drag force, the measuring wire 9 will eventually be cut off at the secant plate 12, thereby separating the recovery device from the target hull.

[0045] like Figure 8 As shown, the porous threading plate 11 is connected to the wire plate installation window 21 through the through hole 5 35 by bolts. To ensure water tightness, a rubber sealing gasket 8 with its own opening 37 is provided between the two. Figure 12 As shown. To facilitate the entry and exit of measuring wires 9 of varying thicknesses, the porous wire guide plate 11 is provided with a series of wire holes 36 of varying diameters. After the measuring wires 9 enter the wire holes 36, to ensure watertightness, vacuum sealant 50 is first used to fill the gaps near the side of the carrying case 1. Silicone gel 51 is then used to fill and cover the remaining space on the outside of the wire holes 36. After the silicone gel 51 cures for 48 hours, a good seal is achieved.

[0046] like Figure 2 As shown, to ensure the rigidity of the thin wall of the supporting box 1, the supporting box 1 is provided with reinforcing ribs 14 distributed along the axial and circumferential directions. The supporting box 1 is connected to the box base 17 only by a welded vertical support plate 20, so as to reduce the deadweight of the box and ensure positive buoyancy. At the same time, a reinforcing plate 19 is provided on the support plate 20 to ensure its rigidity. Four lifting rings 18 are symmetrically provided on the box base 17 to facilitate hooking and installing lifting belts during salvage. Figure 9 As shown, the cutting plate 12 of the mechanical automatic cutting module is connected to the box cutting plate mounting block 22 on the supporting box 1 through the four through-holes 33 by screws. At the same time, the pressing plate 13 is connected to the cutting plate 12 through the three through-holes 32 by screws, and the two ends of the pressing plate 13 are provided with Figure 10 The protrusions 34 shown restrain the measuring wire 9 and prevent it from sliding out from either side. A wire plate mounting window 21 is provided on the carrying case 1 to facilitate the entry and exit of the measuring wire 9. A first mounting block 15 and a second mounting block 16 are provided inside the carrying case 1, arranged symmetrically on the left and right.

[0047] like Figure 11 As shown, the two fixing plates 10 are connected by bolts through the through-hole eight 55 and fixed to the main deck of the target ship by steel wires through the larger through-hole seven 54.

[0048] Data acquisition equipment 24 is installed and assembled as follows Figure 13 As shown, the data acquisition device 24 is surrounded by a cushioning foam pad 26. To ensure the heat dissipation area, the width of the upper cushioning foam pad 26 is slightly larger than the width of the mounting strip 25 so as to expose the upper surface of the data acquisition device 24. Figure 14 The mounting strip 25 shown is fixed to the Figure 15 Mounting platform 1 (23) is shown. To prevent data acquisition device 24 from sliding forward and backward during strong impact, device stoppers 28 are symmetrically positioned on mounting platform 1 (23). The remaining data acquisition devices are mounted in a similar manner. Mounting platform 1 (23) is secured to first mounting block 15 via bolts passing through through-hole 1 (27). Mounting platform 2 (30) is secured to second mounting block 16 via bolts passing through through-hole 2 (29).

[0049] The BeiDou positioning device used in this example is a civilian series. If it is immersed in water, it will not work properly. Therefore, while providing watertight protection for the BeiDou positioning device, it is also necessary to ensure that the positioning device can always float on the sea surface and be exposed at any time. Therefore, the "tumbler" principle is used to design Figure 16 The Beidou positioning device 3 shown. The Beidou positioning device 39 is placed on Figure 17 The cushioning foam block 40 is shown in the cavity 48. The cushioning foam block 40 is squeezed and fixed to the Figure 18 The upper protective cover 38 is shown with Figure 19 In the space formed by the equipment mounting plate 47 shown. To ensure sufficient buoyancy, Figure 20 The lower protective cover 46 shown in the figure adopts a relatively large semicircular cavity structure. At the same time, the lower protective cover 46 is bolted with a relatively large Beidou lifting ring 44 via a through hole 6 49. Figure 21 As shown. To ensure that the center of gravity of the overall mass of the Beidou positioning device 3 is located in the lower half. In this way, when the Beidou positioning device 3 enters the water, the heavier lower half will always be immersed in the seawater, while the lighter upper half will always be on the water surface due to buoyancy. To ensure watertightness, Beidou rubber sealing gaskets 41 are provided between the upper protective cover 38, the equipment mounting plate 47 and the lower protective cover 46, and are tightened and fixed by bolts. At the same time, the lower protective cover 46 and the Beidou lifting ring 44 are squeezed and installed by nuts 42 and gaskets 43 as shown. Figure 22 Shown lifting ring rubber seal 45. Beidou lifting ring 44 is connected with the lifting ring 31 on the box front cover 5 by flexible rope 4.

[0050] To prevent the shield from shielding and interfering with BeiDou signals and ensure smooth BeiDou communication signals, the upper shield 38, the equipment mounting plate 47, and the lower shield 46 are all made of polytetrafluoroethylene plastic. Other equipment manufacturing materials are all stainless steel by default.

[0051] Therefore, the present invention adopts a detachable buoyancy device with the above structure for recovering marine experimental measurement data. In the offshore area without network coverage, the recovery device drifting with the ocean current is located by Beidou positioning in real time on the monitoring ship, so that the salvage ship can accurately find and locate the recovery device.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A detachable buoyancy device for recovering data from offshore experimental measurements, characterized by: The detachable buoyancy device is placed on the main deck of the target ship, and includes a carrying box and a vibration isolation and buffer module arranged at the bottom of the carrying box. A box front cover is provided on one side of the carrying box, and an annular rubber sealing ring is provided between the carrying box and the box front cover. A lifting ring is provided on the box front cover, and the lifting ring is connected to the Beidou positioning device through a flexible rope. A mechanical automatic cutting module is provided on the outer wall of the carrying box, and a data acquisition device is provided inside the carrying box. The data acquisition device is connected with a measuring wire. The measuring wire passes through the carrying box, the mechanical automatic cutting module and the fixing plate and is connected to the measuring sensor. The fixing plate is fixed on the main deck of the target ship, and the data acquisition equipment is connected to the carrying box through an installation mechanism.

2. The detachable buoyancy device for recovering marine experimental measurement data according to claim 1, characterized in that: The vibration isolation and buffer module includes a box base arranged at the bottom of the bearing box and connected to the bearing box through a support plate. The bottom of the box base is connected to a bottom plate through a double-stage steel wire vibration isolator. A reinforcement plate is arranged on the support plate. A lifting ring is arranged on the box base and on one side of the support plate.

3. The detachable buoyancy device for recovering marine experimental measurement data according to claim 1, characterized in that: The Beidou positioning device includes an upper protective cover, a lower protective cover and an equipment mounting plate arranged between the upper protective cover and the lower protective cover. A buffer foam block is arranged between the equipment mounting plate and the upper protective cover. A cavity is arranged on the buffer foam block. The Beidou positioning device is arranged in the cavity. Beidou rubber sealing pads are arranged between the equipment mounting plate and the upper protective cover and the lower protective cover.

4. The detachable buoyancy device for recovering marine experimental measurement data according to claim 3, characterized in that: A through hole six is ​​provided at the bottom of the lower protective cover, and a Beidou lifting ring is connected to the through hole six through a nut and a gasket, and a lifting ring rubber sealing gasket is provided between the gasket and the lower protective cover.

5. The detachable buoyancy device for recovering marine experimental measurement data according to claim 1, characterized in that: The mechanical automatic cutting module includes a wire plate installation window, which is arranged on one side of the carrying box body. A rubber sealing gasket and a porous wire threading plate are sequentially arranged on the side of the wire plate installation window away from the carrying box body. A box body cutting plate installation block is arranged above the wire plate installation window. A wire cutting plate and a wire pressing plate are sequentially arranged on the side of the box body cutting plate installation block away from the carrying box body, and protrusions are provided at both ends of the wire pressing plate.

6. The detachable buoyancy device for recovering marine experimental measurement data according to claim 5, characterized in that: The rubber sealing gasket and the porous wire threading plate are respectively provided with openings and wire holes for the measurement wire to pass through. The wire hole close to the side of the carrying box is sealed by vacuum sealing mud and silicone filling. Two wire fixing plates are provided on the end of the measuring wire close to the measuring sensor. A rubber pad is provided between the two wire fixing plates. The measuring wire passes through between the two rubber pads and is compacted and fixed.

7. The detachable buoyancy device for recovering marine experimental measurement data according to claim 1, characterized in that: The installation mechanism includes installation platform one and installation platform two. The data acquisition device is set on the top of installation platform one, and cushioning foam pads are provided on all sides and top of the installation platform. A mounting strip is provided above the cushioning foam pad to fix the data acquisition device on installation platform one. Device limit blocks are provided on both sides of the data acquisition device.

8. The detachable buoyancy device for recovering marine experimental measurement data according to claim 7, characterized in that: The first mounting platform and the second mounting platform are respectively connected to a first mounting block and a second mounting block arranged inside the bearing box. The outer side wall of the bearing box is provided with reinforcing ribs in the axial and radial directions.

9. The detachable buoyancy device for recovering marine experimental measurement data according to claim 3, characterized in that: The upper protective cover, the lower protective cover and the installation plate are all made of polytetrafluoroethylene plastic material.

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