6000m-class non-magnetic pressure-resistant sealed chamber and its manufacturing method

Abstract

This invention relates to a 6000m-class non-magnetic pressure-resistant sealed chamber and its manufacturing method, belonging to the field of deep-sea equipment. The 6000m-class non-magnetic pressure-resistant sealed chamber includes: a chamber body having a cavity for housing deep-sea exploration equipment; openings at both ends of the cavity along its axial direction for sealing connection with end caps; the chamber body is a multi-layered composite structure, comprising, from the inside to the outside of the cavity, a skeleton layer, a first composite pressure-bearing layer, and a waterproof protective layer, which are sequentially and fixedly connected. The skeleton layer has low permeability and supports the first composite pressure-bearing layer, preventing water from the cavity from penetrating into it. The first composite pressure-bearing layer withstands deep-sea pressure, and the waterproof protective layer provides waterproof protection for the first composite pressure-bearing layer. This invention improves the watertightness and structural stability of the sealed chamber, ensuring stable operation of the equipment inside.

Description

Technical Field

[0001] This invention relates to the field of deep-sea equipment technology, and in particular to a 6000m-class non-magnetic pressure-resistant sealed chamber and its manufacturing method. Background Technology

[0002] Pressure-sealed chambers are pressure-bearing devices specifically designed for marine environments. Their structure includes a chamber body and sealed end caps. The sealing end caps seal the openings in the chamber body, creating a sealed space to accommodate marine exploration equipment. Primarily used in underwater environments, pressure-sealed chambers resist external underwater pressure, maintain their shape and structural integrity, and maintain a dry environment at atmospheric or low pressure within the chamber, thus achieving pressure isolation and providing a safe operating environment for the equipment inside. Pressure-sealed chambers are widely used in marine exploration and other fields to ensure the stable operation of exploration equipment in extreme underwater environments.

[0003] In existing technologies, pressure-bearing sealed chambers are generally made of composite materials. However, in the deep-sea environment at a depth of about 6,000 meters and with high underwater pressure, the inner walls of the chamber made of composite materials may "sweat" or even accumulate water. At the same time, the chamber may absorb seawater, causing water absorption corrosion of the materials, which leads to a decrease in the overall mechanical properties of the chamber (such as strength and stiffness). Consequently, under the high pressure conditions at a depth of about 6,000 meters, the pressure-bearing sealed chamber becomes unstable, which seriously affects the data transmission stability of the equipment inside the pressure-bearing sealed chamber. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a 6000m-class non-magnetic pressure-resistant sealed chamber and its manufacturing method, which can improve the watertightness and structural stability of the sealed chamber, and ensure the stable operation of the equipment inside the sealed chamber.

[0005] A first aspect of the present invention provides a 6000m-class non-magnetic pressure-resistant sealed chamber, comprising:

[0006] The hull has a cavity for housing deep-sea exploration equipment. The cavity has openings at both ends along its axial direction for sealing connection with end caps. The hull is a multi-layered composite structure, comprising, from the inside to the outside of the cavity, a skeleton layer, a first composite pressure-bearing layer, and a waterproof protective layer. The skeleton layer, the first composite pressure-bearing layer, and the waterproof protective layer are sequentially and fixedly connected. The skeleton layer has low permeability and supports the first composite pressure-bearing layer, preventing water from the cavity from penetrating into it. The first composite pressure-bearing layer withstands deep-sea pressure, and the waterproof protective layer provides waterproof protection for the first composite pressure-bearing layer.

[0007] The 6000m-class non-magnetic pressure-resistant sealed chamber according to the first aspect of the present invention has at least the following beneficial effects: In the multi-layer composite structure of the chamber, the first composite pressure-bearing layer can provide strong strength and pressure-bearing effect, enabling the chamber to withstand the strong water pressure of the deep sea without easily deforming. The low-permeability skeleton layer is located inside the first composite pressure-bearing layer. The skeleton layer can play an excellent supporting and anti-permeability role for the first composite pressure-bearing layer, enhance the deformation resistance of the chamber, reduce the degree of deformation of the chamber under high water pressure, and at the same time, when condensation occurs on the inner wall of the containment cavity, it isolates the first composite pressure-bearing layer from water droplets, preventing water from entering the containment cavity. Water can seep into the first composite pressure-bearing layer, causing it to absorb water and corrode. The waterproof protective layer, located around the first composite pressure-bearing layer, provides waterproof protection, isolating it from seawater and preventing it from absorbing seawater and corroding. It also effectively protects the first composite pressure-bearing layer from impact damage. This improves the watertightness and structural stability of the hull, providing a stable working environment for the deep-sea exploration equipment within the cavity, ensuring its stable operation and data transmission.

[0008] In some embodiments of the present invention, the cabin is cylindrical, the receiving cavity is cylindrical, and the skeleton layer, the first composite pressure-bearing layer and the waterproof protective layer are all cylindrical and coaxially arranged.

[0009] In some embodiments of the present invention, the skeleton layer is a non-magnetic metal layer.

[0010] In some embodiments of the present invention, the skeleton layer is a copper foil layer, an aluminum alloy layer, or a titanium alloy layer; and / or,

[0011] The waterproof protective layer is a silicone rubber layer or a polyurethane layer; and / or,

[0012] The first composite pressure-bearing layer is an epoxy resin-glass fiber composite layer; and / or,

[0013] The thickness of the skeleton layer is 2mm to 3mm, the thickness of the first composite pressure-bearing layer is 14mm to 26mm, and the thickness of the waterproof protective layer is 2mm to 4mm.

[0014] In some embodiments of the present invention, the 6000m-class non-magnetic pressure-resistant sealed chamber further includes a second composite pressure-bearing layer. The second composite pressure-bearing layer is located within the inner perimeter of the skeleton layer and is coaxially arranged and fixedly connected with the skeleton layer. The second composite pressure-bearing layer and the first composite pressure-bearing layer are wound together and formed. The skeleton layer is wound and formed between the second composite pressure-bearing layer and the first composite pressure-bearing layer.

[0015] In some embodiments of the present invention, the thickness of the second composite pressure-bearing layer is less than the thickness of the first composite pressure-bearing layer, but greater than the thickness of the skeleton layer; and / or,

[0016] Both the first composite pressure-bearing layer and the second composite pressure-bearing layer are epoxy resin-glass fiber composite layers; and / or,

[0017] The waterproof protective layer is coated on the outer peripheral surface of the first composite pressure-bearing layer.

[0018] In some embodiments of the present invention, the 6000m-class non-magnetic pressure-resistant sealed chamber further includes two sealing end caps, which are detachably connected to the chamber body and are respectively configured in a one-to-one correspondence with the two opening structures and are sealed.

[0019] In some embodiments of the present invention, each of the sealing end caps is provided with an axial sealing structure and a radial sealing structure. The radial sealing structure is sealed to the inner circumferential surface of the receiving cavity, and the axial sealing structure is sealed to the end face of the chamber along its axial direction. The two end faces of the chamber along its axial direction are provided with a plurality of first connecting holes for connecting with screws. The plurality of first connecting holes are evenly arranged along the circumference of the chamber. Each of the sealing end caps is also provided with a plurality of second connecting holes. The plurality of second connecting holes are located on the periphery of the axial sealing structure and are respectively arranged in a one-to-one correspondence with the plurality of first connecting holes.

[0020] In some embodiments of the present invention, one of the sealing end caps is provided with a watertight connector and a mounting structure. The mounting structure is disposed within the inner periphery of the radial sealing structure, located within the receiving cavity, and configured to be detachably connected to the deep-sea exploration equipment. One end of the watertight connector is sealed to the sealing end cap and configured to be electrically connected to the deep-sea exploration equipment; and / or,

[0021] Multiple first connection holes are provided on the first composite bearing layer; and / or,

[0022] The deep-sea exploration equipment includes a mounting plate, a proton magnetometer probe, and a battery compartment, both of which are fixedly connected to the mounting plate.

[0023] A second aspect of the present invention provides a method for manufacturing a 6000m-class non-magnetic pressure-resistant sealed chamber, applicable to the 6000m-class non-magnetic pressure-resistant sealed chamber described in the first aspect embodiment, comprising the following steps:

[0024] The epoxy resin glass fiber composite material is wound and molded to form a second composite pressure-bearing layer with a first predetermined thickness;

[0025] Copper foil material is wound around the periphery of the second composite pressure-bearing layer to form a skeleton layer with a second predetermined thickness;

[0026] The epoxy resin glass fiber composite material is wound around the periphery of the skeleton layer to form a first composite pressure-bearing layer with a third predetermined thickness;

[0027] The waterproof material is coated and molded on the outer peripheral surface of the first composite pressure-bearing layer to form a waterproof protective layer with a fourth predetermined thickness.

[0028] The manufacturing method of the 6000m-class non-magnetic pressure-resistant sealed chamber according to the second aspect of the present invention has at least the following beneficial effects: In the manufacturing process of the 6000m-class non-magnetic pressure-resistant sealed chamber, a second composite pressure-bearing layer is first manufactured by winding epoxy resin glass fiber composite material, and then a skeleton layer is wound on the second composite pressure-bearing layer. Immediately afterwards, the winding of epoxy resin glass fiber composite material continues to manufacture a first composite pressure-bearing layer on the skeleton layer. Finally, a waterproof protective layer is manufactured on the first composite pressure-bearing layer by coating with waterproof material. This can overcome the problems of insufficient adhesion / bonding force between layers and easy deformation in multi-layer composite structures, thereby enhancing the overall strength and structural stability of the chamber.

[0029] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural schematic diagram of a 6000m-class non-magnetic pressure-resistant sealed chamber provided according to an embodiment of the present invention;

[0031] Figure 2 This is an exploded structural diagram of a 6000m-class non-magnetic pressure-resistant sealed chamber provided according to an embodiment of the present invention;

[0032] Figure 3 This is a structural schematic diagram of the cabin provided according to an embodiment of the present invention, viewed from a cross-sectional angle.

[0033] Figure 4 This is a side view of the cabin provided according to an embodiment of the present invention;

[0034] Figure 5 This is a three-dimensional structural schematic diagram of the first sealing end cap provided according to an embodiment of the present invention;

[0035] Figure 6 This is a front view of the first sealing end cap provided according to an embodiment of the present invention;

[0036] Figure 7 This is a three-dimensional structural schematic diagram of the second sealing end cap provided according to an embodiment of the present invention;

[0037] Figure 8 This is a front view of the second sealing end cap provided according to an embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the manufacturing method of a 6000m-class non-magnetic pressure-resistant sealed chamber provided in an embodiment of the present invention;

[0039] Figure 10 This is a finite element analysis result diagram of the cabin without a waterproof protective layer, provided according to an embodiment of the present invention.

[0040] Reference numerals: 100, cabin; 101, receiving cavity; 102, first connecting hole; 110, skeleton layer; 120, first composite pressure-bearing layer; 130, waterproof protective layer; 140, second composite pressure-bearing layer; 200, sealing end cap; 201, second connecting hole; 202, groove; 203, first sealing groove; 204, second sealing groove; 205, third connecting hole; 210, insertion part; 220, sealing part; 230, protrusion; 300, watertight joint; 400, battery compartment; 500, mounting plate; 600, proton magnetometer probe. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] In related technologies, pressure-bearing sealed chambers used for deep-sea exploration are typically made of fiber composite materials. However, in the high-pressure environment of the ocean at depths of approximately 6000 meters, the inner walls of these chambers can experience condensation ("sweating") and even water accumulation. Furthermore, the chambers absorb seawater, leading to water corrosion of the materials. This reduces the strength of the fiber composite materials along their main axis and between layers, resulting in a decrease in the overall mechanical properties of the pressure-bearing chamber, such as strength and stiffness. Consequently, under the intense water pressure at depths of approximately 6000 meters, the pressure-bearing chamber structure becomes unstable, negatively impacting the data transmission stability of the equipment inside. Therefore, it is essential to reinforce and waterproof the pressure-bearing chambers.

[0045] To address this technical problem, the present invention provides a 6000m-class non-magnetic pressure-resistant sealed chamber and its manufacturing method, which can improve the water tightness and structural stability of the sealed chamber and ensure the stable operation of the equipment inside the sealed chamber.

[0046] The following is for reference. Figures 1 to 10 This invention describes a 6000m-class non-magnetic pressure-resistant sealed chamber and its manufacturing method according to embodiments of the present invention.

[0047] like Figures 1 to 8 As shown, the 6000m-class non-magnetic pressure-resistant sealed chamber according to the first aspect of the present invention can be applied to deep-sea exploration work to carry the probe of deep-sea exploration equipment such as a proton magnetometer.

[0048] like Figures 1 to 4 As shown, the structure of the 6000m-class non-magnetic pressure-resistant sealed chamber includes a chamber 100, which is an internally hollow structure. The chamber 100 has a receiving cavity 101 for housing deep-sea exploration equipment. The axis of the receiving cavity 101 is aligned with the axis of the chamber 100. The receiving cavity 101 has openings at both ends along its axis, meaning it extends axially and penetrates both end faces of the chamber 100 to form openings. These openings are used for sealing connections with sealing end caps 200. It is understood that by providing sealing end caps 200 at the openings, the chamber 100 and the sealing end caps 200 together form a sealed cavity, preventing seawater from entering the sealed cavity and affecting the operation of the deep-sea exploration equipment.

[0049] Furthermore, the cabin 100 is a multi-layered composite structure, meaning that the cabin 100 includes multiple inner and outer layers when viewed along its axial direction. Specifically, the cabin 100 includes, from the inside to the outside of the receiving cavity 101, a skeleton layer 110, a first composite pressure-bearing layer 120, and a waterproof protective layer 130. The skeleton layer 110, the first composite pressure-bearing layer 120, and the waterproof protective layer 130 are fixedly connected in sequence. The inner circumferential surface of the skeleton layer 110 defines the receiving cavity 101. The first composite pressure-bearing layer 120 is located on the periphery of the skeleton layer 110, and its inner circumferential surface is fixedly connected to the outer circumferential surface of the skeleton layer 110. The first composite pressure-bearing layer 120 is located on the inner periphery of the waterproof protective layer 130, and its outer circumferential surface is fixedly connected to the inner circumferential surface of the waterproof protective layer 130. In other words, the first composite pressure-bearing layer 120 is sandwiched between the skeleton layer 110 and the waterproof protective layer 130. The skeleton layer 110 has low permeability and can prevent water from penetrating into the first composite pressure-bearing layer 120. The skeleton layer 110 is used to support the first composite pressure-bearing layer 120 and prevent water in the receiving cavity 101 from penetrating into the first composite pressure-bearing layer 120. The first composite pressure-bearing layer 120 is used to withstand the pressure of deep seawater, and the waterproof protective layer 130 is used to provide waterproof protection for the first composite pressure-bearing layer 120.

[0050] In this embodiment, as Figure 3 and Figure 4 As shown, the cabin 100 has a three-layer composite structure. The cabin 100 is cylindrical, and its accommodating cavity 101 is cylindrical. Specifically, the skeleton layer 110, the first composite pressure-bearing layer 120, and the waterproof protective layer 130 are all cylindrical, and they are coaxially arranged. The skeleton layer 110 is a metal layer, specifically a non-magnetic metal layer, preferably a copper foil layer, an aluminum alloy layer, or a titanium alloy layer. The waterproof protective layer 130 is a silicone rubber layer or a polyurethane layer. The first composite pressure-bearing layer 120 is an epoxy resin-glass fiber composite layer.

[0051] The thickness of the skeleton layer 110 is less than the thickness of the first composite pressure-bearing layer 120, and the thickness of the waterproof protective layer 130 is less than the thickness of the first composite pressure-bearing layer 120. The thicknesses of the skeleton layer 110, the first composite pressure-bearing layer 120, and the waterproof protective layer 130 can be selected according to actual design requirements. In this embodiment, the thickness of the skeleton layer 110 is 2mm to 3mm, the thickness of the first composite pressure-bearing layer 120 is 14mm to 26mm, and the thickness of the waterproof protective layer 130 is 2mm to 4mm.

[0052] In some embodiments, such as Figures 1 to 8As shown, the structure of the 6000m-class non-magnetic pressure-resistant sealed chamber also includes two sealing end caps 200. The two sealing end caps 200 are located at opposite ends of the axial direction of the chamber 100. They are detachably connected to the chamber 100 via screws, and each sealing end cap 200 corresponds one-to-one with one of the two opening structures. The sealing end caps 200 and the opening structures are sealed to prevent external seawater from leaking into the receiving cavity 101.

[0053] The sealing end cap 200 can be made of corrosion-resistant marine aluminum alloy and the surface is oxidized to further enhance the corrosion resistance of the sealing end cap 200.

[0054] In this embodiment, as Figures 5 to 8 As shown, each sealing end cap 200 is provided with an axial sealing structure and a radial sealing structure. The axial sealing structure is located outside the radial sealing structure, and the radial sealing structure is sealed to the inner circumferential surface of the receiving cavity 101. The axial sealing structure is sealed to the end face of the compartment 100 along its axial direction. The sealing end cap 200 adopts a dual sealing method of axial sealing (or end face sealing) and radial sealing, which greatly improves the sealing performance.

[0055] Each end face of the chamber 100 along its axial direction is provided with a first connecting hole 102, which can be used for screw connection. Multiple first connecting holes 102 are provided, evenly arranged circumferentially around the central axis of the chamber 100. Each sealing end cap 200 is also provided with a second connecting hole 201, which is located on the periphery of the axial sealing structure and corresponds one-to-one with each of the first connecting holes 102. Therefore, the sealing end cap 200 can be fixedly connected to the chamber 100 by threading screws through the second connecting holes 201 and connecting them to the first connecting holes 102.

[0056] Specifically, the sealing end cap 200 includes an insertion portion 210 and a sealing portion 220. The insertion portion 210 and the sealing portion 220 are coaxially arranged and integrally formed. Both the insertion portion 210 and the sealing portion 220 are cylindrical. The outer diameter of the insertion portion 210 is smaller than the outer diameter of the sealing portion 220. The outer peripheral surface of the insertion portion 210 is provided with a plurality of first sealing grooves 203. The plurality of first sealing grooves 203 are arranged at intervals along the axial direction of the sealing end cap 200 and are coaxially arranged with the sealing end cap 200. A first sealing ring is provided in the first sealing groove 203. The sealing portion 220 is provided with a plurality of second sealing grooves 204 along its axial direction near the surface of the insertion portion 210. The plurality of second sealing grooves 204 are arranged in inner and outer layers and are concentrically arranged with the sealing end cap 200. A second sealing ring is provided in the second sealing groove 204.

[0057] At this time, the first sealing ring on the insertion part 210 is a radial sealing structure, and the second sealing ring on the cover part 220 is an axial sealing structure. After the sealing end cap 200 is installed on the cabin 100, the insertion part 210 extends into the receiving cavity 101, and the first sealing ring on the insertion part 210 is sealed to the inner circumferential surface of the receiving cavity 101. The cover part 220 is located outside the receiving cavity 101 and fits against the end face of the cabin 100. The second sealing ring on the cover part 220 is sealed to the end face of the cabin 100. The number of the first sealing groove 203, the second sealing groove 204, the first connecting hole 102, and the second connecting hole 201 can be set according to the actual situation, and no specific limitation is made here. In addition, the sealing end cap 200 also includes a cylindrical protrusion 230, which is located on the side of the cap portion 220 away from the insertion portion 210 along its axial direction. The protrusion 230 is coaxially arranged with the cap portion 220 and integrally formed. The outer diameter of the protrusion 230 is larger than the outer diameter of the insertion portion 210 and smaller than the outer diameter of the cap portion 220.

[0058] Multiple first connecting holes 102 are provided on the first composite pressure-bearing layer 120. Each first connecting hole 102 is a circular blind hole. Multiple second connecting holes 201 are provided on the cap portion 220. Each second connecting hole 201 is a circular through hole, which can be a screw hole or a smooth-walled circular hole. The multiple second connecting holes 201 are located around the outermost second sealing groove 204, meaning the second sealing ring is located in the inner area enclosed by the multiple second connecting holes 201. In this embodiment, there are eight first connecting holes 102 and eight second connecting holes 201.

[0059] Furthermore, such as Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, one of the sealing end caps 200 is equipped with a watertight connector 300 and a mounting structure. The mounting structure is located within the radial sealing structure. After the sealing end cap 200 is installed on the hull 100, the mounting structure is located within the receiving cavity 101 of the hull 100. The mounting structure is configured to be detachably connected to deep-sea exploration equipment, for example, via screws. One end of the watertight connector 300 is sealed to the sealing end cap 200 and is configured to be electrically and detachably connected to the deep-sea exploration equipment. The other end of the watertight connector 300 is located outside the receiving cavity 101 and can be electrically connected to other equipment.

[0060] Specifically, the two sealing end caps 200 are respectively set as the first sealing end cap and the second sealing end cap, such as... Figure 7 and Figure 8As shown, the second sealing end cap is provided with a watertight connector 300. The insertion portion 210 of the second sealing end cap is provided with a cylindrical groove 202 and a plurality of third connecting holes 205. The opening of the groove 202 is open towards the side of the insertion portion 210 away from the sealing portion 220 along its axial direction. The groove 202 is coaxially arranged with the second sealing end cap. The plurality of third connecting holes 205 are located on the surface of the insertion portion 210 away from the sealing portion 220 along its axial direction and are arranged circumferentially around the groove 202. One end of the watertight connector 300 can extend into the groove 202. At this time, the plurality of third connecting holes 205, the groove 202, and the surface of the insertion portion 210 away from the sealing portion 220 along its axial direction together form an installation structure. Therefore, the deep-sea exploration equipment can be attached to the surface of the insertion part 210 away from the cover part 220 along its axial direction, and connected to the third connecting hole 205 by screws to fix the deep-sea exploration equipment on the insertion part 210 and enable the deep-sea exploration equipment to be electrically connected to the watertight connector 300.

[0061] Understandably, the simultaneous installation of axial and radial sealing structures on the sealing end cap 200 enhances the sealing connection between the sealing end cap 200 and the hull 100, meeting watertightness requirements and effectively preventing external seawater leakage into the hull 100 and affecting the operation of the deep-sea exploration equipment. Furthermore, one of the sealing end caps 200 has a watertight connector 300 and mounting structure at its axial position, facilitating the connection of the deep-sea exploration equipment to the watertight connector 300 and its fixation to the sealing end cap 200. This allows the deep-sea exploration equipment to extend into the receiving cavity 101 of the hull 100 during the installation of the sealing end cap 200. Additionally, the groove 202 enables the positioning and fitting of the deep-sea exploration equipment.

[0062] In this embodiment, as Figure 2 As shown, the deep-sea exploration equipment includes a mounting plate 500, a proton magnetometer probe 600, and a battery compartment 400. The battery compartment 400 and the proton magnetometer probe 600 are located on opposite sides of the mounting plate 500, and both the battery compartment 400 and the proton magnetometer probe 600 are fixedly connected to the mounting plate 500.

[0063] Understandably, a watertight connector 300 (also known as a waterproof connector or sealing connector) is an electrical or piping connection device used to prevent the intrusion of liquids and solid particles under specific depth, pressure, and time conditions. The watertight connector 300 mainly includes a connector body, a sealing element, and a threaded interface. The watertight connector 300 is prior art, and those skilled in the art should understand its specific structure and working principle; therefore, it will not be described in detail here. The proton magnetometer probe 600 is the sensor part of the magnetometer system, responsible for signal acquisition. The proton magnetometer probe 600 can measure the total absolute geomagnetic field strength by utilizing the Larmor precession phenomenon of the magnetic moment of hydrogen nuclei in an external magnetic field. The proton magnetometer probe 600 is connected to the main unit via a high-quality shielded cable to transmit polarization current and return signals. As a key component for signal transmission of the power transmission machine, the watertight connector 300 is directly connected to the housing cavity 101 of the cabin 100 and can be electrically connected to the deep-sea exploration equipment. Therefore, the proton magnetometer probe 600 located in the housing cavity 101 can be electrically connected to the main unit on the sea surface through the watertight connector 300 and the cable.

[0064] In the multi-layered composite structure of the hull 100, the first composite pressure-bearing layer 120 provides strong strength and pressure resistance, enabling the hull 100 to withstand the high water pressure of the deep sea without easily deforming. A low-permeability skeleton layer 110 is located within the first composite pressure-bearing layer 120. The skeleton layer 110 provides excellent support and impermeability to the first composite pressure-bearing layer 120, strengthening the deformation resistance of the hull 100 and reducing the degree of deformation under high water pressure. Simultaneously, in the event of condensation on the inner wall of the receiving cavity 101, it isolates the first composite pressure-bearing layer 120 from water droplets, preventing water from the receiving cavity 101 from penetrating into the first composite pressure-bearing layer 120 and causing the first composite pressure-bearing layer 120 to deform. The first composite pressure-bearing layer 120 absorbs water from the containment cavity 101, causing water absorption and corrosion. The waterproof protective layer 130 is located around the first composite pressure-bearing layer 120. The waterproof protective layer 130 can provide waterproof protection for the first composite pressure-bearing layer 120, isolating it from seawater and preventing it from absorbing seawater and causing water absorption and corrosion. At the same time, it can also effectively protect the first composite pressure-bearing layer 120 from impact damage. This can improve the watertightness and structural stability of the hull 100, thereby providing a stable working environment for the deep-sea exploration equipment in the containment cavity 101, ensuring that the deep-sea exploration equipment can operate stably and transmit data.

[0065] This invention provides a 6000m-class non-magnetic pressure-resistant sealed chamber, which can help realize the "platformization" and "functionalization" of deep-sea equipment, protect the core assets of deep-sea exploration, greatly extend the service life of deep-sea exploration equipment, realize reliable management and transmission of energy and data, and also push the limits of materials science and manufacturing processes.

[0066] In some embodiments, such as Figures 1 to 4 As shown, the 6000m-class non-magnetic pressure-resistant sealed chamber also includes a second composite pressure-bearing layer 140. The second composite pressure-bearing layer 140 is located within the skeleton layer 110, which is situated between the first composite pressure-bearing layer 120 and the second composite pressure-bearing layer 140. The second composite pressure-bearing layer 140 and the skeleton layer 110 are coaxially arranged and fixedly connected. Specifically, the outer peripheral surface of the second composite pressure-bearing layer 140 is connected to the inner peripheral surface of the skeleton layer 110, and the inner peripheral surface of the second composite pressure-bearing layer 140 defines a receiving cavity 101. The second composite pressure-bearing layer 140 is cylindrical. Moreover, the second composite pressure-bearing layer 140 is wound and formed between the first composite pressure-bearing layer 120. The first composite pressure-bearing layer 120 and the second composite pressure-bearing layer 140 are made of the same composite material. The skeleton layer 110 is wound and formed between the second composite pressure-bearing layer 140 and the first composite pressure-bearing layer 120. At this time, the cabin 100 is a four-layer composite structure.

[0067] In this embodiment, as Figure 4 As shown, the thickness of the second composite pressure-bearing layer 140 is less than the thickness of the first composite pressure-bearing layer 120, and the thickness of the second composite pressure-bearing layer 140 is greater than the thickness of the skeleton layer 110. Both the first composite pressure-bearing layer 120 and the second composite pressure-bearing layer 140 are epoxy resin-glass fiber composite layers. The use of epoxy resin-glass fiber composite materials in both layers contributes to the advantages of the cabin 100, including light weight, high strength and rigidity, low shrinkage, excellent fatigue resistance, and good corrosion resistance. A waterproof protective layer 130 is coated on the outer peripheral surface of the first composite pressure-bearing layer 120, fixing the waterproof protective layer 130 to the first composite pressure-bearing layer 120.

[0068] Understandably, this embodiment takes into account the insufficient adhesion / bonding force between the layers of the cabin 100, which fails to meet the requirements of cold working and is prone to deformation. Therefore, a second composite pressure-bearing layer 140 is added to the innermost layer (i.e., the skeleton layer 110) of the cabin 100. The outer periphery of the second composite pressure-bearing layer 140 is sequentially provided with a low-permeability copper foil layer (i.e., the skeleton layer 110, which serves as the axis for winding the cylindrical cabin 100, reinforcing the skeleton and providing waterproofing), an epoxy fiber winding layer (i.e., the first composite pressure-bearing layer 120, which provides pressure-bearing function), and a silicone rubber layer (i.e., the waterproof protective layer 130, which provides isolation, waterproofing, and vibration damping protection). Moreover, the first composite pressure-bearing layer 120 and the second composite pressure-bearing layer 140 are made of the same material, and the first composite pressure-bearing layer 120, the second composite pressure-bearing layer 140, and the skeleton layer 110 are all formed by winding.

[0069] Therefore, in the manufacturing process of the cabin 100, after the epoxy resin glass fiber composite material is wound to a certain thickness, a second composite pressure-bearing layer 140 is formed. Then, copper foil material is added and wound to form a copper foil layer, i.e., a skeleton layer 110, on the second composite pressure-bearing layer 140. Then, the epoxy resin glass fiber composite material is wound again to form a first composite pressure-bearing layer 120 on the skeleton layer 110. At this point, the main structure of the cabin 100, open at both ends and cylindrical in shape, can be manufactured. Finally, a waterproof protective layer 130 is formed on the first composite pressure-bearing layer 120 by coating with a waterproof material such as silicone rubber. This design strengthens the adhesion / bonding force between the skeleton layer 110 and the first composite pressure-bearing layer 120, preventing problems such as delamination, peeling, or cracking of the cabin 100, thereby improving the overall strength and structural stability of the cabin 100.

[0070] In addition, when the second composite pressure-bearing layer 140 is provided, the smoothness of the inner wall of the receiving cavity 101 of the chamber 100 does not meet the sealing requirements. Therefore, the chamber 100 needs to be processed again, and the inner wall of the receiving cavity 101 needs to be polished to improve the smoothness of the inner wall.

[0071] In this embodiment, the cabin 100 is formed by winding and coating techniques to create a cylindrical structure with openings at both ends. Two sealing end caps 200 are used to seal the openings of the receiving cavity 101, thus achieving a simple manufacturing process, low operation difficulty, and low cost.

[0072] Understandably, after calculation and analysis, the wall thickness of the first composite pressure-bearing layer 120 of the hull 100 reaches 14mm, which can meet the requirements for use in a deep-sea environment at a depth of 6000 meters. Furthermore, considering the permeability and wear of the epoxy resin-glass fiber composite material itself, and the need for a certain safety factor for the hull 100, a certain thickness allowance needs to be added to the wall thickness (to enhance the strength and stability of the hull 100). Ultimately, the effective thickness of the first composite pressure-bearing layer 120 can be determined to be 26mm. Finally, the calculated wall thickness results are checked and verified using finite element analysis software, such as... Figure 10 As shown in the analysis results, the design strength, deformation, strain, and stability of hull 100 all meet the performance requirements. Based on the pressure test results of the pressure tube sample from the 6000-meter marine diurnal station, it is confirmed that the structural dimensions of hull 100 meet the pressure design requirements (requiring a pressure resistance of 60 MPa, with an actual design pressure of approximately 70 MPa).

[0073] An external pressure test was conducted on the 6000m-class non-magnetic pressure-resistant sealed chamber (hereinafter referred to as the sample) provided in the embodiment of the present invention. The water pressure at a depth of about 6000 meters is about 60 MPa.

[0074] Before conducting the pressure test on the sample, the sample was weighed, and the sample weight was 30 kg.

[0075] The sample was placed in the pressure chamber, with the initial test pressure set at 10 MPa. The pressure was then gradually increased by 5 MPa at each level, with the pressure rising steadily and slowly. Each test pressure level was maintained for 10 minutes without any pressure fluctuations (this indicates that the sample's seal had not failed). The pressure in the pressure chamber remained consistent with the pressure in the hydraulic pump. Subsequently, the pressure was increased according to the predetermined test conditions, reaching a maximum test pressure of approximately 68 MPa, and then maintained for 20 minutes.

[0076] After the test was completed, the pressure was released and the sample was taken out of the pressure chamber. After the sample was cleaned, the weight of the sample was re-weighed and found to be 30.1 kg.

[0077] By comparing the weight of the sample before and after the pressure test, no significant change was found. Therefore, it can be preliminarily determined that the seal of the sample did not fail during the pressurization process, and no large amount of water entered the receiving cavity 101 of the chamber 100. Then, the sample was unsealed and observed. No water stains were found inside the receiving cavity 101 of the chamber 100 and on the inner surface of the sealing end cap 200. Therefore, it can be proved that the 6000m-class non-magnetic pressure-resistant sealed chamber of this embodiment can meet the requirements for underwater use at 6000m and has good water tightness.

[0078] In addition, if the maximum test pressure can be applied to a level higher than the design pressure, provided that the sample seal has not failed, the pressure can be continued until the sample seal fails.

[0079] like Figures 1 to 10 As shown, the manufacturing method of the 6000m-class non-magnetic pressure-resistant sealed chamber according to the second aspect embodiment of the present invention, applied to the 6000m-class non-magnetic pressure-resistant sealed chamber as described in the first aspect embodiment, includes the following steps:

[0080] Step S10: The epoxy resin glass fiber composite material is wound to form a second composite pressure-bearing layer 140 with a first set thickness.

[0081] Step S20: The copper foil material is wound around the periphery of the second composite pressure-bearing layer 140 to form a skeleton layer 110 with a second set thickness.

[0082] Step S30: The epoxy resin glass fiber composite material is wound around the periphery of the skeleton layer 110 to form a first composite pressure-bearing layer 120 with a third predetermined thickness.

[0083] Step S40: Apply waterproof material to the outer peripheral surface of the first composite pressure-bearing layer 120 to form a waterproof protective layer 130 with a fourth predetermined thickness.

[0084] In the manufacturing process of the 6000m-class non-magnetic pressure-resistant sealed cabin, a second composite pressure-bearing layer 140 is first manufactured by winding epoxy resin glass fiber composite material. Then, a skeleton layer 110 is wound on the second composite pressure-bearing layer 140. Next, the winding of epoxy resin glass fiber composite material continues to create a first composite pressure-bearing layer 120 on the skeleton layer 110. Finally, a waterproof protective layer 130 is created on the first composite pressure-bearing layer 120 by coating with a waterproof material. This can overcome the problems of insufficient adhesion / bonding force between layers and easy deformation in the multi-layer composite structure cabin 100, improve the bonding force between the skeleton layer 110 and the first composite pressure-bearing layer 120, and thus enhance the overall strength and structural stability of the cabin 100.

[0085] After the cabin 100 is manufactured, two sealing end caps 200 can be used to seal the opening structures at both ends of the cabin 100, providing a stable working environment for the deep-sea exploration equipment inside the cavity 101.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A 6000m-class non-magnetic pressure-resistant sealed chamber, characterized in that, include: The cabin (100) has a cavity (101) for housing deep-sea exploration equipment. The cavity (101) has openings at both ends along its axial direction for sealing connection with sealing end caps (200). The cabin (100) is a multi-layered composite structure. From the inside to the outside of the cavity (101), the cabin (100) sequentially includes a skeleton layer (110), a first composite pressure-bearing layer (120), and a waterproof protective layer (130). The skeleton layer (110), the first composite pressure-bearing layer (120), and the waterproof protective layer (130) are sequentially and fixedly connected. (110) has low permeability. The skeleton layer (110) is used to support the first composite pressure-bearing layer (120) and prevent water in the receiving cavity (101) from penetrating into the first composite pressure-bearing layer (120). The first composite pressure-bearing layer (120) is used to withstand deep sea pressure. The waterproof protective layer (130) is used to provide waterproof protection for the first composite pressure-bearing layer (120). The skeleton layer (110) is a copper foil layer, an aluminum alloy layer, or a titanium alloy layer. The waterproof protective layer (130) is a silicone rubber layer or a polyurethane layer. The first composite pressure-bearing layer (120) is an epoxy resin glass fiber composite layer. The 6000m-class non-magnetic pressure-resistant sealed chamber also includes a second composite pressure-bearing layer (140). The second composite pressure-bearing layer (140) is located inside the skeleton layer (110) and is coaxially arranged and fixedly connected with the skeleton layer (110). The second composite pressure-bearing layer (140) and the first composite pressure-bearing layer (120) are wound together. The skeleton layer (110) is wound between the second composite pressure-bearing layer (140) and the first composite pressure-bearing layer (120). Both the first composite pressure-bearing layer (120) and the second composite pressure-bearing layer (140) are epoxy resin glass fiber composite layers. The 6000m-class non-magnetic pressure-resistant sealed chamber also includes two sealing end caps (200). The two sealing end caps (200) are detachably connected to the chamber body (100) and are respectively configured to correspond one-to-one with the two opening structures and are sealed. Each of the sealing end caps (200) is provided with an axial sealing structure and a radial sealing structure. The radial sealing structure is sealed to the inner circumferential surface of the receiving cavity (101), and the axial sealing structure is sealed to the end face of the chamber (100) along its axial direction. The two end faces of the chamber (100) along its axial direction are provided with a plurality of first connecting holes (102) for connecting with screws. The plurality of first connecting holes (102) are evenly arranged along the circumference of the chamber (100). Each of the sealing end caps (200) is also provided with a plurality of second connecting holes (201). The plurality of second connecting holes (201) are located on the periphery of the axial sealing structure and are respectively arranged in a one-to-one correspondence with the plurality of first connecting holes (102).

2. The 6000m-class non-magnetic pressure-resistant sealed chamber according to claim 1, characterized in that, The cabin (100) is cylindrical, the receiving cavity (101) is cylindrical, and the skeleton layer (110), the first composite pressure-bearing layer (120) and the waterproof protective layer (130) are all cylindrical and coaxially arranged.

3. The 6000m-class non-magnetic pressure-resistant sealed chamber according to claim 2, characterized in that, The thickness of the skeleton layer (110) is 2 mm to 3 mm, the thickness of the first composite pressure-bearing layer (120) is 14 mm to 26 mm, and the thickness of the waterproof protective layer (130) is 2 mm to 4 mm.

4. The 6000m-class non-magnetic pressure-resistant sealed chamber according to claim 1, characterized in that, The thickness of the second composite pressure-bearing layer (140) is less than the thickness of the first composite pressure-bearing layer (120) and greater than the thickness of the skeleton layer (110); And / or, the waterproof protective layer (130) is coated on the outer peripheral surface of the first composite pressure-bearing layer (120).

5. The 6000m-class non-magnetic pressure-resistant sealed chamber according to claim 1, characterized in that, One of the sealing end caps (200) is provided with a watertight connector (300) and an installation structure. The installation structure is located in the inner periphery of the radial sealing structure and is located in the receiving cavity (101). It is configured to be detachably connected to the deep-sea exploration equipment. One end of the watertight connector (300) is sealed to the sealing end cap (200) and is configured to be electrically connected to the deep-sea exploration equipment. And / or, a plurality of the first connection holes (102) are provided on the first composite pressure-bearing layer (120); And / or, the deep-sea exploration equipment includes a mounting plate (500), a proton magnetometer probe (600), and a battery compartment (400), wherein the battery compartment (400) and the proton magnetometer probe (600) are both fixedly connected to the mounting plate (500).

6. A method for manufacturing a 6000m-class non-magnetic pressure-resistant sealed chamber, applied to the 6000m-class non-magnetic pressure-resistant sealed chamber as described in claim 1 or 4, characterized in that, The steps include the following: The epoxy resin glass fiber composite material is wound to form a second composite pressure-bearing layer (140) with a first set thickness. Copper foil material is wound around the periphery of the second composite pressure-bearing layer (140) to form a skeleton layer (110) with a second set thickness. The epoxy resin glass fiber composite material is wound around the periphery of the skeleton layer (110) to form a first composite pressure-bearing layer (120) with a third predetermined thickness. The waterproof material is coated and molded on the outer peripheral surface of the first composite pressure-bearing layer (120) to form a waterproof protective layer (130) with a fourth predetermined thickness.

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