Plugging structure capable of bearing external pressure

Abstract

The utility model provides a plugging structure capable of bearing external pressure, which comprises a watertight compartment body, an upper end cover and a lower end cover are respectively arranged on two sides of the watertight compartment body, the upper end cover and the lower end cover are both in threaded connection with connecting flanges, and the connecting flanges are respectively and fixedly connected with two ends of the watertight compartment body. The surfaces of the watertight compartment body and the connecting flange are both coated with polyurethane protective layers, and a reinforcing mechanism is arranged on the inner wall of the watertight compartment body. Composite materials are adopted for laying, it is ensured that stress does not exceed the material limit under the pressure of 10 MPa, the connecting flanges are bonded with the carbon fiber barrel through adhesives, certain rigidity needs to be kept when the connecting flanges bear external pressure, and deformation similar to that of the carbon fiber barrel needs to be kept; the weight of the pressure-resistant cabin made of light composite materials such as carbon fibers and macromolecule resin can be reduced by 40%-60% compared with that of a metal cabin of the same specification, more scientific instruments can be carried in deep sea exploration, and the pressure-resistant cabin has excellent cost performance.

Description

Technical Field

[0001] The utility model relates to a blocking structure capable of bearing external pressure. Background Art

[0002] The sealing structure is a sealed chamber that can withstand a certain pressure. Suitable for watertight electronic chambers at a certain depth, the chamber primarily houses electronic equipment. To protect it from corrosion and damage from seawater, the chamber's sealing performance and ability to withstand external pressure are crucial. As the underwater depth increases, the pressure on the chamber increases dramatically. Watertight electronic chambers capable of withstanding external pressure at depths of 0-1000m are scarce in China. Pressure-resistant chambers suitable for deep-sea environments are generally made of metal materials such as aluminum alloy, titanium alloy, and forged steel.

[0003] Since the sealing structure made of metal materials is limited by its own gravity, the number of electronic equipment it can accommodate is relatively small and it cannot carry more scientific instruments. The cabin made of non-metallic materials is difficult to meet the underwater pressure-bearing performance, which affects the performance of the sealing structure. Utility Model Content

[0004] The utility model provides a sealing structure capable of bearing external pressure in order to provide a safe pressure-bearing operation and running environment for various instruments and equipment in a deep-sea high-pressure environment.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a sealing structure capable of withstanding external pressure, comprising:

[0007] The watertight compartment body is provided with an upper end cover and a lower end cover on both sides of the watertight compartment body, the upper end cover and the lower end cover are both threadedly connected to the connecting flange, and the connecting flange is fixedly connected to the two ends of the watertight compartment body respectively, and a plug is threadedly connected to the middle part of the lower end cover. The surface of the watertight compartment body and the connecting flange are coated with a polyurethane protective layer, and the inner wall of the watertight compartment body is provided with a reinforcement mechanism.

[0008] In this technical solution, the watertight compartment body has a double-layer structure, the outer layer is made of T700-grade carbon fiber formed by wet winding, and the inner layer is made of polymer resin. The watertight compartment body has a circular cylindrical structure, and both ends of the watertight compartment body are connected to the connecting flange by adhesive.

[0009] In the present technical solution, there are two connecting flanges, and both connecting flanges are made of anodized 7075 aluminum alloy.

[0010] In this technical solution, the upper end cover and the lower end cover have the same shape, are made of TC4 titanium alloy, and are embedded in the connecting flange.

[0011] In this technical solution, the edge of the connecting flange is respectively connected to the upper end cover and the lower end cover, and the edge of the connecting flange is respectively fixedly connected to the upper end cover and the lower end cover by a number of evenly distributed screws.

[0012] In this technical solution, the parts of the upper end cover and the lower end cover located inside the connecting flange are provided with two parallel distributed sealing rings, which are sealed to the inner wall of the connecting flange, and another sealing ring is embedded in the side wall of the connecting flange, and the sealing rings are all made of O-type nitrile rubber.

[0013] In this technical solution, a plurality of evenly distributed grooves are provided on the surface of the connecting flange, and the interior of the grooves is filled with a polyurethane protective layer.

[0014] In this technical solution, the edges of the upper end cover and the lower end cover are both fitted and connected with the gasket, and the screw passes through the gasket and contacts the surface of the gasket.

[0015] In this technical solution, the reinforcement mechanism includes a limiting ring and a rib. There are two limiting rings, which are fixedly connected to the inner walls of the watertight compartment at both ends respectively, and the two limiting rings are fixedly connected to both ends of the rib.

[0016] In this technical solution, the cross-section of the limiting ring is an L-shaped structure, the interior of the limiting ring is respectively engaged with the upper end cover and the lower end cover, and the side wall of the limiting ring is provided with a number of evenly distributed ribs, and each rib is fixedly connected to the inner wall of the watertight compartment.

[0017] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0018] The positive progress effect of this utility model is:

[0019] The above-mentioned sealing structure that can withstand external pressure is laid with composite materials to ensure that the stress under 10MPa pressure does not exceed the material limit. The connecting flange is bonded to the carbon fiber cylinder by adhesive. When subjected to external pressure, it must maintain a certain stiffness and a similar deformation to the carbon fiber cylinder to ensure the structural stability of the bonding part and the compression of the radial sealing ring to ensure good sealing. A polyurethane protective layer is cast for outer protection, which has good resistance to the attachment and growth of marine organisms and hydrophobicity. The weight of the pressure cabin made of lightweight composite materials such as carbon fiber and polymer resin can be reduced by 40%-60% compared with the metal cabin of the same specification. It can carry more scientific instruments in deep-sea exploration and has an excellent performance-price ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the upper end cover of the utility model.

[0022] Figure 3 This is a schematic diagram of the internal half-section three-dimensional structure of the utility model.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the limiting ring of the utility model.

[0024] Figure 5 This is a schematic diagram of the external front view structure of the utility model.

[0025] Figure 6 This is a schematic diagram of the external side structure of the utility model.

[0026] Description of Reference Numerals

[0027] 1. Watertight compartment hull; 2. Upper end cover; 3. Lower end cover; 4. Connecting flange; 5. Polyurethane protective layer; 6. Groove; 7. Plug; 8. Screw; 9. Washer; 10. Sealing ring; 11. Limiting ring; 12. Rib. DETAILED DESCRIPTION

[0028] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0029] like Figure 1-6 As shown, the sealing structure capable of withstanding external pressure includes:

[0030] A watertight compartment hull 1 is provided with an upper end cover 2 and a lower end cover 3 on both sides of the watertight compartment hull 1. The upper end cover 2 and the lower end cover 3 are both threadedly connected to the connecting flange 4, and the connecting flange 4 is fixedly connected to the two ends of the watertight compartment hull 1 respectively. A plug 7 is threadedly connected to the middle part of the lower end cover 3. The surfaces of the watertight compartment hull 1 and the connecting flange 4 are coated with a polyurethane protective layer 5, and the inner wall of the watertight compartment hull 1 is provided with a reinforcement mechanism.

[0031] The watertight compartment body 1 is a double-layer structure, the outer layer is made of T700-grade carbon fiber formed by wet winding, and the inner layer is made of polymer resin. The watertight compartment body 1 is a circular cylindrical structure, and both ends of the watertight compartment body 1 are connected to the connecting flange 4 by adhesive; there are two connecting flanges 4, and both connecting flanges 4 are made of 7075 aluminum alloy that has been anodized; the upper end cover 2 and the lower end cover 3 have the same shape, and the material of the upper end cover 2 and the lower end cover 3 are both TC4 titanium alloy, and the upper end cover 2 and the lower end cover 3 are both embedded in the connecting flange 4.

[0032] In this technical solution, the watertight compartment hull 1 is formed by wet winding of T700 grade carbon fiber. The winding design of the watertight compartment hull 1 adopts grid theory to calculate its strength. The ply laying sequence is a combination of spiral and circumferential methods. After the winding is completed, a curing process is performed. The connecting flange 4 is an important component for connecting the watertight compartment hull 1 and the upper end cover 2 and the lower end cover 3. It is made of 7075 aluminum alloy material consistent with the Beidou detection buoy. After processing, it is hard anodized and chromate sealed to form a dense oxide layer on the surface of the connecting flange 4 to improve corrosion resistance and wear resistance. The upper end cover 2 and the lower end cover 3 are made of TC4 titanium alloy material with excellent mechanical properties to ensure that they will not be severely deformed when bearing external pressure during use. According to the installation requirements of the watertight connector, three installation interfaces for power supply, hydrophone and synchronization network are processed on the upper end cover 2, and a threaded hole is processed in the center of the lower end cover 3 to install a threaded plug 7 for charging and exhaust during installation.

[0033] The edges of the connecting flange 4 are respectively fitted and connected with the upper end cover 2 and the lower end cover 3, and the edges of the connecting flange 4 are fixedly connected with the upper end cover 2 and the lower end cover 3 by a number of evenly distributed screws 8; the parts of the upper end cover 2 and the lower end cover 3 located inside the connecting flange 4 are provided with two parallel distributed sealing rings, and the sealing rings are sealed and fitted with the inner wall of the connecting flange 4, and another sealing ring is embedded in the side wall of the connecting flange 4, and the sealing rings are made of O-type nitrile rubber; the surface of the connecting flange 4 is provided with a number of evenly distributed grooves 6, and the interior of the grooves 6 is filled with a polyurethane protective layer 5; the edges of the upper end cover 2 and the lower end cover 3 are both fitted and connected with the gasket 9, and the screws 8 pass through the gasket 9 and contact the surface of the gasket 9.

[0034] In this technical solution, the sealing ring adopts axial and radial sealing structures respectively. An axial sealing groove is provided on the connecting flange 4, and double radial sealing grooves are provided on the upper end cover 2 and the lower end cover 3. Nitrile rubber O-rings are used for sealing, and screws 8 are used to reinforce the edges of the upper end cover 2 and the lower end cover 3.

[0035] The reinforcement mechanism includes a limiting ring and a rib. There are two limiting rings, which are respectively fixedly connected to the inner walls of the watertight compartment hull 1 at both ends, and the two limiting rings are fixedly connected to the two ends of the rib. The cross-section of the limiting ring is an L-shaped structure, and the interior of the limiting ring is respectively engaged with the upper end cover 2 and the lower end cover 3. The side wall of the limiting ring is provided with a number of evenly distributed ribs, and each rib is fixedly connected to the inner wall of the watertight compartment hull 1.

[0036] In this technical solution, after the upper end cover 2 and the lower end cover 3 are installed in place, they are moved to the inside of the limiting ring, the upper end cover 2 and the lower end cover 3 are fixed by the limiting ring, and the ribs are used to provide overall support for the watertight compartment body 1, thereby further improving the pressure-bearing performance.

[0037] The present invention is not limited to the above-described embodiments. Any changes in shape or structure fall within the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications shall fall within the scope of protection of the present invention.

Claims

1. A sealing structure capable of withstanding external pressure, characterized in that: include: A watertight compartment hull (1), wherein an upper end cover (2) and a lower end cover (3) are respectively provided on both sides of the watertight compartment hull (1), the upper end cover (2) and the lower end cover (3) are both threadedly connected to a connecting flange (4), and the connecting flange (4) is respectively fixedly connected to both ends of the watertight compartment hull (1), a plug (7) is threadedly connected to the middle part of the lower end cover (3), the surfaces of the watertight compartment hull (1) and the connecting flange (4) are both coated with a polyurethane protective layer (5), and the inner wall of the watertight compartment hull (1) is provided with a reinforcement mechanism.

2. A sealing structure capable of withstanding external pressure according to claim 1, characterized in that: The watertight compartment body (1) is a double-layer structure, the outer layer is made of T700-grade carbon fiber formed by wet winding, and the inner layer is made of polymer resin. The watertight compartment body (1) is a circular cylindrical structure, and both ends of the watertight compartment body (1) are connected to the connecting flange (4) by an adhesive.

3. The sealing structure capable of withstanding external pressure according to claim 1, wherein: The number of the connecting flanges (4) is two, and both connecting flanges (4) are made of 7075 aluminum alloy that has been anodized.

4. The sealing structure capable of withstanding external pressure according to claim 1, wherein: The upper end cover (2) and the lower end cover (3) have the same shape, are both made of TC4 titanium alloy, and are both embedded in the connecting flange (4).

5. The sealing structure capable of withstanding external pressure according to claim 4, characterized in that: The edges of the connecting flange (4) are respectively connected to the upper end cover (2) and the lower end cover (3), and the edges of the connecting flange (4) are respectively fixedly connected to the upper end cover (2) and the lower end cover (3) by a plurality of evenly distributed screws (8).

6. The sealing structure capable of withstanding external pressure according to claim 4, characterized in that: The upper end cover (2) and the lower end cover (3) are provided with two parallel distributed sealing rings on the parts located inside the connecting flange (4), and the sealing rings are in sealing contact with the inner wall of the connecting flange (4). Another sealing ring is embedded in the side wall of the connecting flange (4), and the sealing rings are both made of O-type nitrile rubber.

7. The sealing structure capable of withstanding external pressure according to claim 3, wherein: The surface of the connecting flange (4) is provided with a plurality of evenly distributed grooves (6), and the interior of the grooves (6) is filled with a polyurethane protective layer (5).

8. The sealing structure capable of withstanding external pressure according to claim 5, wherein: The edges of the upper end cover (2) and the lower end cover (3) are both fitted and connected with the washer (9), and the screw (8) passes through the washer (9) and contacts the surface of the washer (9).

9. The sealing structure capable of withstanding external pressure according to claim 1, wherein: The reinforcement mechanism comprises a limiting ring and a rib, wherein the limiting rings are two in number and are respectively fixedly connected to the inner walls at both ends of the watertight compartment body (1), and the two limiting rings are both fixedly connected to both ends of the rib.

10. The sealing structure capable of withstanding external pressure according to claim 9, characterized in that: The cross section of the limiting ring is an L-shaped structure, and the interior of the limiting ring is respectively engaged with the upper end cover (2) and the lower end cover (3). The side wall of the limiting ring is provided with a plurality of evenly distributed ribs, and each rib is fixedly connected to the inner wall of the watertight compartment body (1).

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