Unmanned underwater vehicle floatation material fixing structure

Abstract

Unmanned underwater vehicle buoyancy material fixing structure, the present invention relates to underwater vehicle buoyancy material technical field.The present invention solves the problem that the existing underwater vehicle buoyancy material and vehicle fixing form are usually connected by bolt fixing, and the hollow glass microsphere float is externally sprayed with polycarbonate protective layer, and the bolt is easy to damage the float during disassembly for replacing the buoyancy material in later period, the buoyancy material is relatively fragile, repeated disassembly will cause the wear of the float, and the polycarbonate protective layer is easy to fall off after a long time, and the like.The present invention comprises a float, a screw sleeve, a nut sleeve and a protective layer;the float is arranged in the vehicle cabin composed of a framework and a non-pressure shell, the float is processed with a bolt through hole, the screw sleeve and the nut sleeve are embedded in the bolt through hole, and the outer part of the float is integrally coated with the protective layer.The present invention is used for unmanned underwater vehicle float installation and fixing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of buoyancy material of underwater vehicle, and particularly relates to a unmanned underwater vehicle buoyancy material fixing structure. BACKGROUND

[0002] In order to achieve the buoyancy balance of underwater vehicle in water, the buoyancy material needs to be arranged in the cabin. The selection of the buoyancy material is crucial to the performance and task execution. The buoyancy material needs to have low density, high buoyancy, pressure resistance, corrosion resistance and good mechanical properties. The types of buoyancy material of underwater vehicle usually include: 1, hollow glass microsphere composite material, hollow glass microsphere is a light material made of fumed silica and epoxy resin, which has low density and large buoyancy, can withstand deep sea high pressure environment, and is widely used in underwater vehicles by combining with resin to form solid buoyancy material; 2, composite foam material is made of light non-metallic material and resin-based fiber, which has low density, high compression strength weight ratio, low creep and low water absorption, is suitable for deep sea environment, and is commonly used in deep sea buoy, floating platform and the like, which can provide stable buoyancy and protection for underwater equipment; 3, resin-based fiber composite material combines the excellent performance of resin and fiber, has high strength, low density and good corrosion resistance, is suitable for deep sea environment, and is widely used in buoyancy material of deep sea vehicle.

[0003] At present, the buoyancy material of underwater vehicle is usually fixedly connected with the vehicle by bolts, and a polycarbonate protective layer is sprayed on the outside of the hollow glass microsphere buoyancy material. The bolts are easy to damage the buoyancy material when they are removed for replacing the buoyancy material. Since the buoyancy material is relatively fragile, repeated disassembly will cause the buoyancy material to wear out. In addition, the polycarbonate protective layer is easy to fall off after a long time. When the vehicle adopts a shell and a framework made of carbon fiber composite material, the shell and the framework form an open structure to provide an open space for placing equipment. The open space formed by splicing the shell and the framework is convenient for installing the buoyancy material in the rib spacing of the framework. Since the carbon fiber composite material has the characteristics of not being easy to process screw holes, the screws of the large-area thin-wall shell are easy to vibrate and loosen, which causes the buoyancy material to loosen and fall off. SUMMARY

[0004] The present application aims to solve the problems in the prior art that the buoyancy material of underwater vehicle is usually fixedly connected with the vehicle by bolts, and a polycarbonate protective layer is sprayed on the outside of the hollow glass microsphere buoyancy material. The bolts are easy to damage the buoyancy material when they are removed for replacing the buoyancy material. Since the buoyancy material is relatively fragile, repeated disassembly will cause the buoyancy material to wear out. In addition, the polycarbonate protective layer is easy to fall off after a long time. The present application provides a unmanned underwater vehicle buoyancy material fixing structure.

[0005] The technical scheme adopted by the present application to solve the above problems is: an unmanned underwater vehicle floating material fixing structure, comprising a floating material, a screw sleeve, a nut sleeve, a protective layer and a boss limiting block; the outer part of the floating material is entirely covered with the protective layer, the floating material is arranged inside a vehicle cabin composed of a framework and a non-pressure-resistant shell; a connecting piece stepped hole is processed on the floating material, the screw sleeve and the nut sleeve are embedded in the connecting piece stepped hole, the boss limiting block is connected with the framework, the boss limiting block and the mounting surface of the floating material are arranged correspondingly, a metal embedded part is connected to the boss limiting block, and the floating material is mounted on the framework through the connecting piece; the metal embedded part is in the shape of an upper lower circular structure, comprising a square embedded part and a circular embedded part, a connecting hole is arranged on the circular embedded part, and an upper lower circular embedded hole is arranged on the framework corresponding to the boss limiting block, and the metal embedded part is mounted in the embedded hole and connected with the framework.

[0006] Further, a fixed surface groove corresponding to the boss limiting block is arranged on the floating material, and the boss limiting block is arranged inside the fixed surface groove.

[0007] Further, the screw sleeve and the nut sleeve are coaxially arranged.

[0008] Further, the connecting piece is a fixed bolt, and the floating material is fixedly connected with the metal embedded part through the fixed bolt.

[0009] Further, the fixed bolt is a titanium alloy or stainless steel bolt.

[0010] Further, the screw sleeve and the nut sleeve are both carbon fiber tubes.

[0011] Further, the protective layer is a carbon fiber protective layer.

[0012] Further, the thickness of the carbon fiber protective layer is 0.4mm-2mm.

[0013] The present application has the following beneficial technical effects:

[0014] The floating material is processed with a bolt via hole, the carbon fiber screw sleeve and the carbon fiber nut sleeve are embedded in the bolt via hole, the fixed bolt is connected with the vehicle framework after passing through the carbon fiber sleeve, the floating material is not damaged when the fixed bolt is disassembled for replacing the floating material in the later period, the floating material is effectively protected, the carbon fiber sleeve is easy to replace, has good adaptability and low maintenance cost. The floating material is entirely bonded and covered with a carbon fiber protective layer on the outside, which can effectively protect the solid floating material, is not easy to fall off compared with the traditional sprayed polycarbonate layer, effectively protects the floating material, prolongs the service life of the floating material and improves the endurance time of the unmanned vehicle.

[0015] The application is used for fixing and installing the buoyancy material of the underwater vehicle with the carbon fiber composite material framework, the metal embedded part is bonded in the framework in the form of upper round lower, avoiding the strength failure of the adhesive for a long time use, the square head is larger than the round head, the square head is clamped in the framework, the embedded part will not fall out of the round hole, avoiding the situation that the thin wall shell screw is easy to shake and loosen, the buoyancy material installation connection is stable.

[0016] The framework of the vehicle is provided with a boss limiting block, and the floating material is provided with a fixed surface groove corresponding to the boss limiting block, the boss limiting block is arranged on the installation surface, the screw is loosened, the boss plays a limiting pin role, and the floating material is prevented from falling off. Meanwhile, the positioning of the floating material in the vehicle cabin is accurate, the stability of the overall floating center of the floating material is improved, the balanced floating center of the floating material is ensured to be above the gravity center of the vehicle, and the operation stability of the underwater vehicle is high. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the application;

[0018] Figure 2 is a structural schematic diagram of the floating material;

[0019] Figure 3 is a structural schematic diagram of the underwater vehicle;

[0020] Figure 4 is a structural schematic diagram of the underwater vehicle framework and the non-pressure-resistant shell;

[0021] Figure 5 is a structural schematic diagram of the embedded hole of the framework metal embedded part;

[0022] Figure 6 is a sectional view of the underwater vehicle;

[0023] Figure 7 is a sectional view of the buoyancy material of the underwater vehicle;

[0024] In the drawings, 1 is a framework, 2 is a non-pressure-resistant shell, 3 is a floating material, 301 is a fixed surface groove, 302 is a clearance round corner, 4 is a screw sleeve, 5 is a nut sleeve, 6 is a protective layer, 7 is a boss limiting block, 8 is a fixed bolt, 9 is a metal embedded part, 901 is a square embedded part, 902 is a round embedded part, 903 is a connecting hole, and 10 is an underwater vehicle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below by combining the drawings and examples in the specification, and the specific examples described herein are only used to explain the application and not to limit the application.

[0026] DETAILED DESCRIPTION Figures 1 to 7 In order to solve the problems in the prior art that the buoyancy material used by the underwater vehicle is fixedly connected with the vehicle by bolts, and the hollow glass microsphere buoyancy material is externally sprayed with a polycarbonate protective layer, the buoyancy material is easy to be damaged when the bolts are removed for replacing the buoyancy material, and the polycarbonate protective layer is easy to fall off after a long time, a convex block can also play the role of a limiting pin to prevent the buoyancy material from falling off when a screw is loose, the buoyancy material is coated with a carbon fiber composite material layer on the surface, the carbon fiber composite material layer has good strength and plays a good protective role, and a carbon fiber composite material pipe is arranged in the screw hole, the buoyancy material is relatively fragile, and repeated disassembly will cause the buoyancy material to be worn, and the unmanned underwater vehicle buoyancy material fixing structure is provided, wherein Figure 1 As Figure 4 is a sectional view. In the embodiment, the surface on which the buoyancy material 3 and the vehicle skeleton are fixedly installed is the installation surface, and the surface close to the vehicle shell body is processed into a shell shape.

[0027] In the prior art, the main structure of the underwater vehicle adopts an open structure of a shell and a skeleton made of carbon fiber composite material to provide an open space for placing equipment, the carbon fiber composite material is convenient for embedding metal parts or punching, the upper open space formed by splicing the shell and the skeleton is convenient for installing the buoyancy material body in the rib spacing, the installation embedded part is adhered in the skeleton in the upper-down circular form to avoid the strength failure of the adhesive after a long time of use, so that the embedded part falls off and drops out, the square head is larger in size than the round head, the square head is clamped in the skeleton and will not drop out of the round hole, the use of a large area of thin-walled shell is avoided, and the screws for fixing the buoyancy material 3 are not easy to shake and loosen. The upper-down orientation indicated by the upper-down orientation word in the upper-down circular form only indicates the orientation or position relationship of the metal embedded part 9 for the convenience of description, and does not indicate that the device or structure must have a specific orientation.

[0028] In the embodiment, the unmanned underwater vehicle buoyancy material fixing structure includes a buoyancy material 3, a screw sleeve 4, a nut sleeve 5, a protective layer 6, and a convex block limiting piece 7. The outer part of the buoyancy material 3 is entirely coated with the protective layer 6, the buoyancy material 3 is arranged inside a vehicle cabin composed of a skeleton 1 and a non-pressure-resistant shell 2, a connecting piece stepped hole is processed on the buoyancy material 3, the screw sleeve 4 and the nut sleeve 5 are embedded in the connecting piece stepped hole, the convex block limiting piece 7 is connected with the skeleton 1, the convex block limiting piece 7 and the installation surface of the buoyancy material 3 are correspondingly arranged, the metal embedded part 9 is connected with the convex block limiting piece 7, and the buoyancy material 3 is installed on the skeleton 1 through the connecting piece.

[0029] The metal embedded part 9 has a top-bottom circular structure, including a square embedded part 901 and a circular embedded part 902. The circular embedded part 902 is provided with a connecting hole 903. The boss limiting block 7 and the skeleton 1 are respectively provided with top-bottom circular embedded holes. The metal embedded part 9 is installed in the embedded hole and connected to the skeleton 1. The connecting hole 903 is machined into a threaded hole.

[0030] In this embodiment, the float material 3 is machined with bolt holes, and carbon fiber screw sleeves 4 and carbon fiber nut sleeves 5 are embedded in the bolt holes. The fixing bolts 8 pass through the carbon fiber sleeves and are connected to the vehicle frame 1. When the buoyancy material is replaced or the vehicle is repaired, the fixing bolts 8 are removed, which does not easily damage the buoyancy material and effectively protects the buoyancy material.

[0031] In this embodiment, multiple sets of floats 3 are installed inside the cabin formed by the non-pressure-resistant hull 2 ​​of the underwater vehicle 10. By reasonably arranging the positions of the floats, the center of buoyancy of the unmanned underwater vehicle is adjusted to be higher than the center of gravity. After the vehicle is disturbed, a restoring torque will be generated to maintain stable buoyancy.

[0032] Specific Implementation Method Two: Combining Figures 1 to 7 In this embodiment, the screw sleeve 4 and the nut sleeve 5 are coaxially arranged.

[0033] In a preferred embodiment, the connector is a fixing bolt 8, and the float 3 is fixedly connected to the metal embedded part 9 via the fixing bolt 8. Since the metal embedded part 9 is fixedly connected to the frame 1, the float 3 is connected to the frame 1 via the fixing bolt 8. In a preferred embodiment, the fixing bolt 8 is a titanium alloy or stainless steel bolt.

[0034] In a preferred embodiment, the frame 1 is provided with a boss limiting block 7 for fixing the float 3, and the float 3 is provided with a fixing surface groove 301 corresponding to the boss limiting block 7. The four corners of the fixing surface groove 301 are machined with clearance rounded corners 302. The frame 1 has a boss on the mounting surface of the float. If the screws loosen, the boss limiting block can act as a limiting pin to prevent the float from falling off. The boss limiting block 7 can be machined separately and then fixedly connected to the frame 1, or the boss limiting block 7 and the frame 1 can be machined as a whole.

[0035] In the present embodiment, the floating material 3 is provided with a fixed surface groove 301 corresponding to the boss limiting block 7, the boss limiting block 7 is arranged inside the fixed surface groove 301, and the four corners of the fixed surface groove 301 are processed with clearance fillets 302. The four vertical corner positions of the fixed surface groove 301 are processed with clearance fillets 302, and the groove with clearance fillets is compared with the groove with straight angles around, the clearance fillets can effectively disperse stress and reduce the risk of cracking caused by stress concentration at the straight angle position, the structure has high strength, the edge of the fixed surface groove 301 is not easy to crack, and the service life of the floating material is effectively improved.

[0036] The other components and connection relationships are the same as those in the first embodiment.

[0037] Embodiment three: combination Figures 1 to 7 It is illustrated that in the present embodiment, the screw sleeve 4 and the nut sleeve 5 are both carbon fiber tubes, and the screw sleeve 4 is provided with a stepped surface at one end close to the nut sleeve 5.

[0038] In a preferred embodiment, the protective layer 6 is a carbon fiber protective layer; the thickness of the carbon fiber protective layer is 0.5-1.5 mm.

[0039] In a preferred embodiment, the protective layer 6 is a carbon fiber protective layer; the thickness of the carbon fiber protective layer is 0.4 mm.

[0040] In a preferred embodiment, the protective layer 6 is a carbon fiber protective layer; the thickness of the carbon fiber protective layer is 2 mm.

[0041] In a preferred embodiment, the protective layer 6 is bonded and coated on the outside of the entire floating material 3.

[0042] In the present embodiment, the entire floating material is bonded and coated with a carbon fiber protective layer 6 on the outside, the carbon fiber protective layer 6 is bonded on the outside of the entire floating material 3 through epoxy resin, which can effectively protect the solid floating material, is not easy to fall off compared with the traditional sprayed polycarbonate protective layer, effectively protects the floating material, prolongs the service life of the floating material, and improves the endurance time of the unmanned vehicle.

[0043] Embodiment four: combination Figures 1 to 7 It is illustrated that in the present embodiment, the floating material 3 is a hollow glass microsphere composite material, and the hollow glass microsphere is a floating material made of fumed silica and epoxy resin. Hollow glass microsphere composite material and composite foam material are preferred for deep sea applications, while polyurethane foam and copolymer foam are more suitable for shallow or medium depth tasks; nano floats and resin-based fiber composites provide high stability and durability.

[0044] The hollow glass microsphere composite material in the embodiment can be prepared by the following method, and the specific steps are as follows:

[0045] Step one: 40-70 parts of dicyclopentadiene, 0.2-5.0 parts of ruthenium carbene complex catalyst, 0.2-5.0 parts of silane coupling agent and 5-40 parts of polymerization inhibitor are mixed to obtain a mixture; the silane coupling agent is selected from trimethoxysilane and / or tetra-2-methoxyethoxysilane; the polymerization inhibitor is selected from one or more of styrene, acetone and methanol;

[0046] Step two: 20-60 parts of hollow glass microspheres are added to the mixture and stirred to obtain a liquid buoyancy material;

[0047] Step three: the liquid buoyancy material is vibrated for 5 min-24 h, so that the material is divided into three layers, the bottom layer is the sinking glass microspheres, the middle layer is the excess liquid material, and the upper layer is the material containing tightly packed intact glass microspheres; the diameter of the hollow glass microspheres is 5-200 microns, the true density is 50-800 kg / cm3, and the static pressure strength is 1-250 MPa;

[0048] Step four: the layered material is heated and solidified, and after cutting off the bottom layer and the middle layer material, a solid buoyancy material is obtained;

[0049] The heating temperature in step four is 60-80°C, and the heating time is 6-12 h; the solidification temperature is 115-130°C, and the solidification time is 2-8 h.

[0050] The other components and connection relationships are the same as those in the first embodiment.

[0051] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An unmanned underwater vehicle floatation structure, characterized by: Including floating material (3), screw sleeve (4), screw cap sleeve (5), protective layer (6) and boss limiting block (7), the outer whole of the floating material (3) is covered with the protective layer (6), the floating material (3) is arranged inside the cabin of the vehicle composed of the framework (1) made of carbon fiber composite material and the non-pressure-resistant shell (2), the floating material (3) is hollow glass microsphere composite material; The connecting piece stepped hole is processed on the floating material (3), the screw sleeve (4) and the screw cap sleeve (5) are inlaid in the connecting piece stepped hole, the boss limiting block (7) is connected with the framework (1), the mounting surface of the boss limiting block (7) and the floating material (3) is correspondingly arranged, the metal embedded part (9) is connected with the boss limiting block (7), and the floating material (3) is mounted on the framework (1) through the connecting piece; The shape of the metal embedded part (9) is upper and lower circular structure, including square embedded part (901) and circular embedded part (902), the connecting hole (903) is arranged on the circular embedded part (902), the upper and lower circular embedded holes are correspondingly arranged on the boss limiting block (7) and the framework (1), the metal embedded part (9) is installed in the embedded hole and connected with the framework (1); The screw sleeve (4) and the screw cap sleeve (5) are carbon fiber pipes, and the protective layer (6) is a carbon fiber protective layer.

2. The unmanned underwater vehicle floatation fixture of claim 1, wherein: The floating material (3) is provided with a fixed surface groove (301) corresponding to the boss limiting block (7), and the boss limiting block (7) is arranged in the fixed surface groove (301).

3. The unmanned underwater vehicle floatation fixture of claim 1, wherein: The screw sleeve (4) and the screw cap sleeve (5) are coaxially arranged.

4. The unmanned underwater vehicle floatation fixture of claim 1, wherein: The connecting piece is a fixed bolt (8), and the floating material (3) is fixedly connected with the metal embedded part (9) through the fixed bolt (8).

5. The unmanned underwater vehicle floatation structure of claim 4, wherein: The fixed bolt (8) is a titanium alloy or stainless steel bolt.

6. The unmanned underwater vehicle floatation fixture of claim 1, wherein: The thickness of the carbon fiber protective layer is 0.4mm-2mm.

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