Underwater adsorption sealing device capable of adapting to local unevenness

Abstract

The invention discloses an underwater adsorption sealing device capable of adapting to local unevenness. The underwater adsorption sealing device comprises an adsorption structure and a sealing structure. The sealing structure comprises: a housing for a desired device; the soft material is arranged on the periphery of the opening side of the shell and can be attached to an adsorbed target surface under the extrusion acting force of the shell; the waterproof glue is arranged in the funnel-shaped cavity of the soft material and can overflow out of the soft material under the extrusion acting force; the thin film is arranged at the opening part of the funnel-shaped cavity made of the soft material, is used for blocking the waterproof glue and can be degraded after meeting water; the adsorption structure comprises a plurality of sliding rods used for connecting the plugging block and the permanent magnet; the fixing part is used for being fixed outside the shell and guiding a sliding rod of the sliding rod; the plugging block is used for supporting the spring between the plugging block and the fixing part; the spring sleeves the sliding rod, so that the bottom of the strong permanent magnet is higher than the bottom of the soft material; and the permanent-magnet strong magnet is hinged with the sliding rod through a spherical hinge. The method can effectively adapt to a ferromagnetic uneven target surface.

Description

Technical Field

[0001] The present invention belongs to the field of underwater adsorption sealing devices adaptable to local unevenness, and particularly relates to an underwater adsorption sealing device adaptable to local unevenness. Background Art

[0002] In modern industrial and military applications, underwater adsorption sealing devices adaptable to local unevenness play an extremely important role. The enclosed space constructed by such devices can provide an ideal water-free enclosed environment for the built-in equipment. Underwater adsorption sealing devices adaptable to local unevenness can adapt to a variety of application scenarios, including but not limited to: support for outdoor photography in rainy days, monitoring in industrial cutting operations, cleaning and maintenance of underwater ships, scientific research monitoring and testing, underwater construction operations, stealth approach and attachment to military targets, ensuring the stability of drilling platforms in ocean energy development, inspection and maintenance of underwater infrastructure, emergency underwater rescue operations, environmental control in aquaculture, equipment fixation in underwater tourism, and marine environment monitoring and other key tasks.

[0003] Based on the adsorption sealing of underwater ferromagnetic uneven surfaces, traditional underwater adsorption sealing devices adaptable to local unevenness mainly rely on vacuum adsorption sealing, thrust adsorption sealing, or magnetic adsorption sealing. However, vacuum adsorption sealing is easily affected by the unevenness or cracks of the target surface, and when the leakage amount exceeds the limit, the adsorption sealing ability will be lost; the device generating thrust in thrust adsorption sealing has high noise, large volume, low efficiency, poor adsorption sealing effect on uneven surfaces, and is easily interfered by water flow and water pressure; magnetic adsorption sealing is difficult to adapt to underwater uneven surfaces. The defects existing in the adsorption sealing performance of existing devices make it difficult to adapt to complex underwater environments and affect the smooth progress of operations. Summary of the Invention

[0004] The purpose of the present invention is to provide an underwater adsorption sealing device adaptable to local unevenness, aiming to solve the functional defects of existing underwater adsorption sealing devices adaptable to local unevenness in terms of adaptability and versatility, especially in the adsorption sealing application based on ferromagnetic materials, where traditional devices are difficult to effectively deal with uneven ferromagnetic target surfaces, affecting the operation efficiency.

[0005] The technical solution for achieving the purpose of the present invention is as follows:

[0006] An underwater adsorption sealing device adaptable to local unevenness, comprising an adsorption structure and a sealing structure,

[0007] The sealing structure includes:

[0008] A housing for the required equipment;

[0009] The soft material is arranged around the opening side of the housing and can be attached to the adsorbed target surface under the extrusion force of the housing;

[0010] The waterproof glue is arranged in the funnel-shaped cavity of the soft material and can overflow from the soft material under the extrusion force to fill the gap between the soft material and the target surface and solidify;

[0011] The film is arranged at the orifice of the funnel-shaped cavity of the soft material, which is used to prevent the waterproof glue from oxidizing and deteriorating and can degrade after encountering water;

[0012] The adsorption structure includes:

[0013] Multiple sliding rods are used to connect the plug block and the permanent magnet strong magnet;

[0014] The fixing part is used to be fixed outside the housing and guide the sliding rod of the sliding rod;

[0015] The plug block is used to support the spring between it and the fixing part;

[0016] The spring is sleeved on the sliding rod to make the bottom of the permanent magnet strong magnet higher than the bottom of the soft material;

[0017] The permanent magnet strong magnet is hinged to the sliding rod through a ball hinge and can rotate under the magnetic adsorption force to adapt to the unevenness of the target surface, and use the spring to apply an extrusion force to the housing.

[0018] Compared with the prior art, the remarkable advantages of the present invention are:

[0019] The underwater adsorption and sealing device structure of the present invention that can adapt to local unevenness uses the permanent magnet strong magnet component to be freely rotatable within a certain angle range, and the sealing component in contact with the target surface is a soft material. This device can effectively adapt to ferromagnetic uneven target surfaces and has wide adaptability.

[0020] Finally, due to the precise design of the adsorption and sealing assembly, the volume and shape of this device can be flexibly designed according to the volume of the underwater operation equipment, that is, it can be large or small, and can be cylindrical or square in shape, etc., and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view sectional structure schematic diagram of the present invention.

[0022] Figure 2 It is a front view external structure schematic diagram of the present invention.

[0023] Figure 3 It is a bottom view external structure schematic diagram of the present invention.

[0024] Figure 4 It is an isometric external structure schematic diagram of the present invention.

[0025] Figure 5 Isometric schematic diagram of the adsorption structure of the present invention.

[0026] Figure 6 Front view of the slide bar, plug block, and permanent magnet of the present invention (the permanent magnet rotates a certain angle). Specific embodiments

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Combined with Figures 1-6 , an underwater adsorption and sealing device adaptable to local unevenness, comprising an adsorption structure and a sealing structure. The adsorption structure can effectively adsorb on the underwater ferromagnetic uneven target surface; the sealing structure can ensure the sealing effect of the device underwater.

[0029] The sealing structure includes a hard shell 1, a soft material 2, a waterproof glue 3, and a PVA film 4. The overall structure of the device is made of hard materials except for the soft material 2, the waterproof glue 3, and the PVA film 4.

[0030] The soft material 2 is arranged around the opening side of the hard shell 1, and a material with moderate hardness should be used to better fit the target surface, and the material itself does not chemically react with the waterproof glue 3; the waterproof glue 3 should have good elasticity, adhesion, and rapid curing characteristics in the underwater environment; the PVA film 4 is used to prevent the waterproof glue from oxidizing and deteriorating and can dissolve quickly when encountering water.

[0031] The cross-sectional shape of the soft material 2 for storing the waterproof glue 3 is funnel-shaped. Such a structure enables the soft material 2 to generate greater deformation when being extruded by the hard shell 1, and at the same time, such a structure can also store more waterproof glue 3, thereby achieving a better sealing effect.

[0032] The PVA film 4 dissolves quickly when encountering water. The soft material 2 can closely adhere to the adsorbed target surface when being extruded by the hard shell 1, and at the same time, the waterproof glue 3 is extruded out to bond the soft material 2 and the adsorbed target surface.

[0033] The adsorption structure includes a plug block 5, a spring 6, a fixing ring (or fixing blocks evenly spaced around the hard shell 1) 7, a slide bar 8, and a permanent magnet 9.

[0034] The permanent magnet can continuously provide an adsorption force without external energy; the permanent magnet 9 is connected to the slide bar 8 through a ball joint, enabling the permanent magnet to freely rotate within a certain angle range to adapt to the unevenness of the target surface. The actual volume and number of the permanent magnet 9 are set to different sizes and numbers according to different application environments.

[0035] The fixed ring 7 is fixedly connected to the rigid shell 1; the spring 6 is sleeved on the sliding rod 8 and is located between the plug block 5 and the fixed ring 7. Under the action of gravity, the spring 6 is in a slightly compressed state; the upper part of the sliding rod 8 is fixedly connected to the plug block 5, and the lower part of the sliding rod 8 is connected to the permanent magnet strong magnet 9 through a ball hinge. The middle part of the sliding rod 8 can slide up and down on the fixed ring 7; when the device is not adsorbed to the ferromagnetic target surface, the bottom horizontal plane of the permanent magnet strong magnet 9 is slightly higher than the bottom horizontal plane of the soft material 2; when the device is adsorbed to the ferromagnetic target surface, the spring 6 is compressed, generating a tendency to rebound towards both ends and continuously acting on the fixed ring 7, thereby pushing the rigid shell 1 towards the target surface, causing the rigid shell 1 to squeeze the soft material 2. When the soft material 2 is squeezed by the rigid shell 1, it can closely adhere to the adsorbed target surface. At the same time, the waterproof glue 3 is squeezed out to fill the tiny gap between the sealing structure and the target surface, bonding the soft material 2 and the adsorbed target surface to achieve a good sealing effect.

[0036] The selection principle of the adsorption structure is as follows:

[0037] The whole plug block 5 is cylindrical or square. The Brinell hardness of its material must be greater than 4HB. The height should be 0.01 - 0.2 times the height of the rigid shell. The radius of the lower plane is 0.15 - 0.25 times the height of the rigid shell. However, the length of the radius of the lower plane must be greater than the length of the upper plane of the sliding rod and less than the width of the fixed ring. The number of plug blocks is equal to the number of permanent magnet strong magnets.

[0038] The spring 6 is a cylindrical helical spring. The Brinell hardness of its material must be greater than 4HB. The height is 0.1 - 0.3 times the height of the rigid shell. And its diameter is greater than the inner diameter of the upper plane of the sliding rod and less than the radius of the lower plane of the plug block. The number of springs is equal to the number of permanent magnet strong magnets. The actual stiffness of the spring should ensure that the elastic force generated by it is greater than the sum of the gravity of the equipment installed in the device and the gravity of the device and less than 0.5 times the adsorption force of the permanent magnet strong magnet, so as to ensure the stability of the device seal.

[0039] According to Hooke's law, we can get:

[0040] F = k × x × a

[0041] Where F is the force acting on the spring; k is the stiffness of the spring; x is the deformation of the spring; a is the number of springs;

[0042] To ensure that the device is firmly adsorbed to the ferromagnetic target surface and at the same time ensure that the spring can supply sufficient resilience to the fixed ring, F should meet the following requirements:

[0043] 0.3(G 设 + G 装 + F 浮 ) ≤ F ≤ 0.7(G 设 + G 装 + F 浮 ) Where G设 For the gravity of the equipment installed in the device; G 装 For the gravity of the device; F 浮 For the buoyancy force generated by the device; The fixing ring 7 is a circular ring or a rectangular ring as a whole, etc. The Brinell hardness of its material must be greater than 4 HB, and the height should be 0.01 - 0.3 times the height of the hard shell. Its inner diameter is equal to the outer diameter of the hard shell, and the outer diameter is the inner diameter + 0.1 - 0.3 times the height of the hard shell. There are evenly distributed cylindrical or square through holes on the fixing ring, and the number of holes is equal to the number of permanent magnet strong magnets;

[0044] The upper part of the sliding rod 8 is a long straight round rod or a square rod, and a spherical hinge joint is fixedly connected to the lower end. The Brinell hardness of its material must be greater than 4 HB, and the height should be 0.1 - 0.8 times the height of the hard shell. The number of sliding rods is equal to the number of permanent magnet strong magnets;

[0045] There is a depression on the upper part of the permanent magnet strong magnet 9, which is matched with the spherical hinge joint at the lower part of the sliding rod. The material is selected as neodymium iron boron. Its size and quantity are reversely designed according to the adsorption force calculation formula, the engineering safety factor 1.5 to be adopted and the size of the hinge joint at the bottom of the sliding rod. The adsorption force generated by the permanent magnet strong magnet should be greater than or equal to 1.5 times the sum of the gravity of the equipment installed in the device, the gravity of the device and the buoyancy force generated by the device, so as to ensure the adsorption stability of the device,

[0046] According to the adsorption force calculation formula of the permanent magnet strong magnet, the adsorption force can be obtained:

[0047] F 吸 = μ × ρ × V × g × b

[0048] Where F 吸 Is the adsorption force provided by the permanent magnet strong magnet; μ is the adsorption coefficient (related to the permanent magnet material, neodymium iron boron magnet is selected, μ = 600); ρ is the density of the permanent magnet strong magnet; V is the volume of the permanent magnet strong magnet; g is the local acceleration of gravity; b is the number of permanent magnet strong magnets;

[0049] The adsorption force of the permanent magnet strong magnet needs to meet the safety factor (1.5 times overload protection):

[0050] F 吸 ≥ 1.5(G 设 + G 装 + F 浮 )

[0051] Where G 设 Is the gravity of the equipment installed in the device; G 装 Is the gravity of the device; F 浮 Is the buoyancy force generated by the device;

[0052] The relationship between the stroke of the permanent magnet strong magnet and the spring compression amount:

[0053] x = hi -Δh

[0054] where x is the deformation of the spring; h i is the initial height difference between the bottom of the permanent magnet strong magnet and the bottom of the soft material; Δh is the deformation of the soft material after being compressed.

[0055] The deformation Δh of the soft material needs to meet the sealing requirements, which are usually determined by experiments.

[0056] The selection principle of the sealing structure is as follows:

[0057] The whole hard shell 1 is a cylindrical shell or a hexahedron shell with an upper seal. Its material, height, inner diameter, etc. are selected according to the equipment to be installed later. The Brinell hardness of its material must be greater than 4HB. At the same time, non-transparent materials or transparent materials can also be selected according to specific requirements. The height and inner diameter are selected appropriately according to the equipment installed in the device;

[0058] The shape of the soft material 2 is selected according to the selection of the hard shell. However, the structure at its bottom for storing waterproof glue is designed as a funnel shape. The Shore hardness of its material must be between 30-90 degrees. The height should be 0.01-0.3 times that of the hard shell. When the proportion of the soft material in the height of the hard shell is too large, it will cause the overall sealing of the device to be unstable. The radial dimension is the same as that of the hard shell; The soft material 2 and the hard shell body are connected by a mortise and tenon structure to ensure that the two can work stably together when stressed.

[0059] The shape of the waterproof glue 3 is selected according to the selection of the soft material. It should have good elasticity, adhesion and rapid curing characteristics in an underwater environment. Its size is determined according to the height of the soft material. Its kinematic viscosity must be between 1500-6500 cps;

[0060] The size and thickness of the PVA film 4 are appropriately selected according to the size of the device. Its thickness should be moderate. It should be as thin as possible on the premise of protecting the waterproof glue from oxidation during the storage of the device, so that it can dissolve quickly when it meets water.

[0061] The adsorption structure is fixedly connected to the hard shell of the sealing structure through its fixing ring. When the device structure operates, the adsorption structure first contacts and adsorbs the target surface, and then the adsorption structure pushes the sealing structure, so that a tight seal is formed between the sealing structure and the target surface.

[0062] Due to the precise design of the adsorption and sealing assembly, the volume and shape of this device can be flexibly designed according to the volume of underwater operation equipment, with a wide range of applications. For example, if the equipment is a small monitoring instrument, the hard shell can be designed as a small cylindrical or square shell (such as a diameter / side length of 50 - 200 mm), the height of the soft material is adjusted accordingly to 5 - 15 mm, the volume of the permanent magnet strong magnet is reduced to the minimum size that meets the adsorption requirements (single adsorption force of 5 - 20 N), and the compact adsorption and sealing linkage is achieved through the parameter matching of the sliding rod and the spring. For large equipment such as an underwater scientific research exploration chamber, the hard shell can be extended to a cylindrical shape (diameter of 400 - 1000 mm) or a square shape (side length of 500 - 1200 mm), the height of the soft material is increased accordingly to 30 - 100 mm, the number of permanent magnet strong magnets is increased to 8 - 24 and the volume is increased (single adsorption force of 1000 - 5000 N), and at the same time, the spring stiffness (1e4 - 5e4 N / m) is optimized to adapt to the weight and buoyancy balance of larger equipment. In addition, the opening angle (30° - 60°) of the funnel-shaped cavity of the soft material of the sealing structure can be adjusted according to the roughness of the target surface, and the film thickness can be flexibly selected between 0.1 - 0.5 mm according to the water depth requirements, ensuring that the device can achieve stable adsorption and dynamic sealing in different water depth environments (10 - 500 m), meeting the diverse application scenarios from micro sensors to large ocean engineering equipment.

[0063] The present invention aims to solve the adsorption and sealing problem based on an underwater ferromagnetic uneven surface. By innovatively designing the linkage mechanism of the adsorption structure and the sealing structure, and utilizing the ball joint connection of the permanent magnet strong magnet, the spring rebound compensation, and the deformation energy storage of the soft material, the limitation of the mutual separation of adsorption and sealing in traditional technologies is broken through. Specifically, when the device contacts the target surface, the permanent magnet freely rotates to fit the surface, and the continuous rebound force generated by the spring compression drives the hard shell to squeeze the soft material, forcing the waterproof glue to dynamically fill the interface gap. This design not only significantly improves the adaptability of the device to complex curved surfaces, but also can meet the diverse requirements from millimeter-level precision equipment to large ocean engineering equipment by parametrically adjusting the magnet and spring configurations, filling the current technological gap.

[0064] Example 1

[0065] Please refer to Figures 1-6 , in Example 1, the monitoring equipment is fixed in the hard shell.

[0066] Specifically, the application environment of this example is the adsorption and sealing of an underwater ferromagnetic target surface, as well as the monitoring work of the monitoring equipment installed in the device. The material of the adsorption target surface is Q235 steel, which has good ferromagnetism.

[0067] In this example, as Figure 1As shown, the hard shell is a square tempered glass shell with a length of about 120 mm, a height of about 120 mm, and a width of about 6 mm. Its density is 2600 kg / m 3 , and its volume is about 3.46e-4 m 3 . The mass is about 6.5e-1 kg; the soft material is nitrile rubber with a length of about 10 mm, a height of about 10 mm, and a width of about 6 mm. Its density is 1000 kg / m 3 , and its volume is about 2.88e-5 m 3 . The mass is about 2.88e-2 kg; the waterproof glue is polyurethane. The waterproof glue has a length of about 120 mm, a height of about 1.73 mm, an upper bottom length of about 4 mm, and a lower bottom length of about 2 mm. Its density is 1300 kg / m 3 , and its volume is about 2.49e-6 m 3 . The mass is about 3.24e-3 kg; the PVA film has a length of about 120 mm, a height of about 0.2 mm, and a width of about 4 mm. Its density is 1270 kg / m 3 . The volume and mass are both negligible; the plug is a cylindrical 304 stainless steel with a bottom radius of about 4.5 mm and a height of about 2 mm. Its density is 7930 kg / m 3 , and its volume is about 1.27e-7 m 3 . The mass is about 5e-4 kg; the spring has both ends tightened, a wire diameter of 1 mm, a diameter of 6 mm, a free length of 20 mm, and a stiffness of 3.5e3 N / m; the fixing ring is a square 304 stainless steel with a length of about 120 mm, a height of about 5 mm, and a width of about 20 mm. Its density is 7930 kg / m 3 , and its volume is about 4.8e-5 m 3 . The mass is about 3.8e-1 kg; the slide bar is a polystyrene PS cylinder with a hinge joint, a length of about 40 mm, and a radius of about 1 mm. Its density is 1100 kg / m 3 , and its volume is about 1.26e-7 m 3 . The mass is about 1.38e-4 kg; the permanent magnet strong magnet is cylindrical and has a spherical cavity dug out above it for hinging the slide bar. The bottom radius of the permanent magnet strong magnet is about 5 mm and the height is about 10 mm. Its density is 7500 kg / m 3 , and its volume is about 5e-7 m 3 . The mass is about 3.75e-3 kg, and the adsorption force generated by a single permanent magnet strong magnet is 22.05 N (here, the permanent magnet strong magnet is a neodymium iron boron magnet with an adsorption coefficient of 600). Among them, there are eight plug blocks, springs, slide bars, and permanent magnet strong magnets, and there are two on each square transparent shell surface and are evenly distributed. The height of the slide bar and the height and stiffness of the spring can be appropriately adjusted within a certain range according to the specific requirements of the equipment in the shell to avoid affecting the test range or shooting line of sight of the equipment in the shell. And it is assumed that the gravity of the equipment installed in the device is about 30 N.

[0068] Considering the extreme underwater adsorption and sealing environment of the device, it is estimated that the gravity of the device is about 32 N, the buoyancy generated by it is about 20 N, and all the strong magnets can generate an adsorption force of 176.4 N. A safety factor of 1.5 is taken.

[0069] 176.4 N > 1.5×(30 N + 32 N + 20 N)

[0070] Therefore, the device meets the usage requirements.

[0071] Specifically, in this embodiment, the monitoring device is first fixed inside a rigid shell or on a steel plate. Then, the PVA film is torn off, and the bottom surface of the device is slowly lowered in a posture parallel to the steel plate. The device is then adsorbed and sealed on the target surface.

[0072] Specifically, in this embodiment, the soft material has dropped by 1 mm. The vertical distance between the initial bottom horizontal plane of the permanent magnet strong magnet and the initial bottom horizontal plane of the waterproof glue is 4 mm. Therefore, the spring is compressed by 3 mm, and the elastic force generated by all the springs is 84 N. Therefore, the force exerted by the rigid shell on the soft material is also 84 N.

[0073] In the simulation tests conducted, the three groups of tests were carried out at a water depth of 10 m, 20 m, and 30 m and a temperature of 25 °C. The three groups of adsorption and sealing devices all maintained good adsorption and sealing effects within 48 h.

[0074] Embodiment 2

[0075] The technical solution of this embodiment is the same as that of Embodiment 1, and the main differences lie in the material and shape of the adsorption and sealing target and the rigid shell.

[0076] Specifically, the application environment of this embodiment is the surface of an underwater ship. The surface of the underwater ship is uneven and there are marine organisms and garbage attached. In addition, scientific research equipment is installed on the surface of the underwater ship to collect underwater environment data and conduct scientific research. The material of the adsorption target surface is the uneven surface of the underwater ship, which has good ferromagnetic properties.

[0077] In this embodiment, as Figure 1 shown, a cylindrical 304 stainless steel shell is selected as the rigid shell. The inner diameter of the bottom surface of the cylinder is about 400 mm, the outer diameter is about 430 mm, and the height is about 800 mm. Its density is 7930 kg / m 3 , and the volume is about 6.25e-2 m 3 , and the mass is about 4.96e2 kg; the soft material is nitrile rubber. The inner diameter of the bottom surface is about 400 mm, the outer diameter is about 430 mm, and the height is about 80 mm. Its density is 1000 kg / m 3 , and the volume is about 6.25e-3 m 3, with a mass of approximately 6.25 kg; the waterproof glue is polyurethane. The inner diameter of the bottom surface of the waterproof glue is approximately 410 mm, the outer diameter is approximately 420 mm, the height is approximately 10.38 mm, the length of the upper bottom is approximately 20 mm, the length of the lower bottom is approximately 10 mm, and its density is 1300 kg / m 3 , with a volume of approximately 6.46e-5 m 3 , with a mass of approximately 8.4e-2 kg; the inner diameter of the bottom surface of the PVA film is approximately 410 mm, the outer diameter is approximately 420 mm, the height is approximately 1 mm, the width is approximately 4 mm, and its density is 1270 kg / m 3 , the volume and mass are both negligible; the plug is a cylindrical 304 stainless steel, the bottom radius is approximately 20 mm, the height is approximately 10 mm, and its density is 7930 kg / m 3 , with a volume of approximately 1.26e-5 m 3 , with a mass of approximately 1e-1 kg; the two ends of the spring are tightened, the wire diameter is 3 mm, the diameter is 18 mm, the free length is 1 hundred mm, and the stiffness is 4.5e4 N / m;; the fixing ring is a circular 304 stainless steel, the inner diameter of the bottom surface is approximately 400 mm, the outer diameter is approximately 480 mm, the height is approximately 20 mm, and its density is 7930 kg / m 3 , with a volume of approximately 4.42e-3 m 3 , the slide bar is a polystyrene PS cylinder with a hinge joint, the length is approximately 200 mm, the radius is approximately 5 mm, and its density is 1100 kg / m 3 , with a volume of approximately 1.57e-5 m 3 , the permanent magnet strong magnet is cylindrical and has a spherical cavity dug out above it for hinging the slide bar. The bottom radius of the permanent magnet strong magnet is approximately 70 mm, the height is approximately 70 mm, and its density is 7500 kg / m 3 , with a volume of approximately 0.7e-3 m 3 , with a mass of approximately 5.25 kg, and the adsorption force generated by a single permanent magnet strong magnet is 4100 N (here, the permanent magnet strong magnet is made of neodymium iron boron magnet, and its adsorption coefficient is 600). Among them, there are eight plug blocks, springs, slide bars, and permanent magnet strong magnets, which are evenly distributed on the fixing ring. And it is assumed that the weight of the equipment installed in the device is approximately 5000 N.

[0078] Considering the extreme underwater adsorption and sealing environment of the device, it is estimated that the weight of the device is approximately 5500 N, the buoyancy generated by it is approximately 5000 N, and all the strong magnets can generate an adsorption force of 32800 N. A safety factor of 1.5 is taken.

[0079] 32800 N > 1.5×(5000 N + 5500 N + 5000 N)

[0080] Therefore, the device meets the usage conditions.

[0081] In this embodiment, the scientific research equipment is installed inside a steel cylindrical shell. Select the target surface to be adsorbed, and slowly lower the bottom surface of the device in a posture parallel to the surface of the underwater ship. The device is then adsorbed and sealed on the target surface.

[0082] Specifically, in this embodiment, the soft material has dropped by 50 mm. The vertical distance between the initial bottom horizontal plane of the permanent magnet strong magnet and the initial bottom horizontal plane of the waterproof glue is 90 mm. Therefore, the spring is compressed by 40 mm, and the elastic force generated by all the springs is 14,400 N. Therefore, the force exerted by the hard shell on the soft material is also 14,400 N.

[0083] In the simulation tests conducted, the three groups of tests were carried out at a temperature of 25°C at water depths of 10 m, 20 m, and 30 m respectively. The three adsorption and sealing devices maintained good adsorption and sealing effects within 48 hours.

[0084] The described embodiments of the present invention are only a part of the embodiments of the present invention, rather than all embodiments, and do not thereby limit the scope of the present invention to the described range. Based on the content of the present invention, other embodiments obtained by those of ordinary skill in the art without creative efforts all fall within the scope of protection of the present invention.

Claims

1. An underwater adsorption sealing device adaptable to local unevenness, comprising an adsorption structure and a sealing structure, characterized in that the sealing structure includes: a housing for the required equipment; a soft material provided around the opening side of the housing, which can fit on the adsorbed target surface under the extrusion force of the housing; a waterproof glue provided in the funnel-shaped cavity of the soft material, which can overflow from the soft material under the extrusion force, fill the gap between the soft material and the target surface and solidify; a film provided at the mouth of the funnel-shaped cavity of the soft material, for preventing the waterproof glue from oxidizing and deteriorating, and can degrade after encountering water; the adsorption structure includes: a plurality of sliding rods for connecting a plug block and a permanent magnet with strong magnetism; a fixing part for fixing on the outside of the housing and guiding the sliding rods of the sliding rods; a plug block for supporting a spring between it and the fixing part; a spring sleeved on the sliding rod to make the bottom of the permanent magnet higher than the bottom of the soft material; a permanent magnet, hinged to the sliding rod through a ball hinge, can rotate under the magnetic adsorption force to adapt to the unevenness of the target surface, and use the spring to apply an extrusion force to the housing.

2. The underwater adsorption sealing device adaptable to local unevenness according to claim 1, characterized in that, The force acting on the spring satisfies F: 0.3(G 设 +G 装 +F 浮 ) ≤ F ≤ 0.7(G 设 +G 装 +F 浮 ); The adsorption force of the permanent magnet satisfies: F 吸 ≥1.5(G 设 +G 装 +F 浮 ); Among which G 设 is the gravity of the equipment installed in the device; G 装 is the gravity of the device; F 浮 is the buoyancy force generated by the device.

3. The underwater adsorption and sealing device adaptable to local unevenness according to claim 1, characterized in that, The film uses a PVA film with a Shore hardness between 30 and 90 degrees.

4. The underwater adsorption and sealing device adaptable to local unevenness according to claim 1, characterized in that The fixing part uses a fixing ring or a fixing block fixed around the hard shell.

5. The underwater adsorption and sealing device adaptable to local unevenness according to claim 1, characterized in that The spring is a cylindrical helical spring with a Brinell hardness greater than 4HB.

6. The underwater adsorption and sealing device adaptable to local unevenness according to claim 1, characterized in that, The soft material is nitrile rubber.

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