Outer protective shell for seabed joint and seabed joint assembly

Abstract

The utility model provides an outer protective shell for a seabed node and a seabed node assembly, and belongs to the technical field of marine environment detection equipment, the outer protective shell comprises a shell body, the shell body comprises a laying column, an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected in a buckled mode; a containing cavity used for containing seabed nodes is defined by the interior of the upper shell and the interior of the lower shell, and a circulation opening communicating with the containing cavity is formed in the shell body. The laying column comprises an upper plugging end, a lower plugging end and a connecting column, the upper plugging end is located on the inner wall of the upper shell, the lower plugging end is located on the inner wall of the lower shell, the two ends of the connecting column are fixed to the upper plugging end and the lower plugging end in a plugging mode respectively, a laying opening is formed in the side wall of the shell body, and the laying column is opposite to the laying opening. When laying or recycling operation needs to be carried out, a rope or a hook or the like extends into the laying opening and bypasses the laying column to be connected. Due to the fact that the laying columns are located in the shell body, the laying columns are not prone to being broken due to external collision, and falling of seabed nodes cannot be caused.

Description

Technical Field

[0001] The present application belongs to the technical field of marine environment detection equipment, and more specifically, relates to an outer protective shell for a seabed node and a seabed node assembly. Background Art

[0002] The subsea nodes contain a variety of sensors that detect seafloor vibrations and underwater pressure signals for subsequent data processing and analysis. To protect the housing and exposed sensors from damage, the subsea nodes require an external protective casing. Furthermore, to facilitate deployment and retrieval of the subsea nodes, deployment structures such as hooks or loops for cables to pass through are required.

[0003] Patent publication number CN115485587A discloses a hybrid seismic data acquisition device and corresponding method, which utilizes a separate hook or loop 422 structure on a beam element as the aforementioned deployment structure. Similarly, patent publication number CN113661414A discloses a subsea node with a removable acoustic sonar transmitter, which utilizes a loop 224 located outside the housing as the deployment structure.

[0004] However, the solutions in the aforementioned patents all have drawbacks. Specifically, because their deployment structures are all independently protruding structures arranged on the outside, they are easily damaged during transportation or deployment and recovery in the sea, and may even cause the seabed nodes to fall off due to collisions during deployment. Summary of the Invention

[0005] The utility model provides an outer protective shell for a submarine node and a submarine node assembly, which are used to solve the problem that a deployed structure is easily damaged by collisions and causes the submarine node to fall off.

[0006] To achieve the above objectives, the technical solution adopted in the present application is as follows: providing an outer protective shell for a submarine node, comprising an outer shell body, the outer shell body comprising an upper shell and a lower shell that are detachably fastened to each other, the interior of the upper shell and the interior of the lower shell forming an accommodating cavity for accommodating the submarine node, and the outer shell body having a flow port communicating with the accommodating cavity for allowing water to enter;

[0007] It also includes a placing column, which includes an upper plug-in end, a lower plug-in end and a connecting column; the upper plug-in end is located on the inner wall of the upper shell, the lower plug-in end is located on the inner wall of the lower shell, the upper plug-in end and the lower plug-in end are arranged opposite to each other, and the two ends of the connecting column are respectively plugged and fixed with the upper plug-in end and the lower plug-in end; a placing opening is opened on the side wall of the shell body, and the placing column is arranged opposite to the placing opening.

[0008] Optionally, both the upper plug-in end and the lower plug-in end are plug-in holes, and both ends of the connecting column are respectively plugged into the corresponding plug-in holes.

[0009] Optionally, both the upper plug-in end and the lower plug-in end are plug-in posts, the connecting posts are cylindrical in structure, and both ends of the connecting posts are respectively plugged into the outer sides of corresponding plug-in posts.

[0010] Optionally, an upper placement notch is provided at the edge where the upper shell and the lower shell are connected to each other, and a lower placement notch is provided at the edge where the lower shell and the upper shell are connected to each other. The upper placement notch and the lower placement notch are opposite to each other and form a placement opening.

[0011] Optionally, upper convex edges are provided on both sides of the upper shell, and lower convex edges corresponding to the two upper convex edges are provided on both sides of the lower shell, and the upper convex edges and the corresponding lower convex edges are provided with bolt holes opposite to each other, and the upper convex edges and the lower convex edges are fitted together and bolted together; the side walls where the upper convex edges and the lower convex edges fit together are respectively provided with positioning protrusions and positioning grooves, and the positioning protrusions are inserted into the positioning grooves.

[0012] Optionally, the inner top wall of the upper shell is fixedly connected to an upper limit top edge, the inner bottom wall of the upper shell is fixedly connected to an upper limit bottom edge, the left and right inner side walls opposite to each other are fixedly connected to upper limit side edges, the inner wall of the upper shell facing the lower shell is fixedly connected to an upper support wall, and the upper limit top edge, the upper limit bottom edge, the upper support wall and the two groups of upper limit side edges form an upper limit groove;

[0013] The inner top wall of the lower shell is fixedly connected with a lower limit top edge, the inner bottom wall of the lower shell is fixedly connected with a lower limit bottom edge, the left and right inner side walls opposite to each other of the lower shell are fixedly connected with lower limit side edges, the inner wall of the lower shell facing the upper shell is fixedly connected with a lower support wall, and the lower limit top edge, the upper limit bottom edge, the lower support wall and the two groups of lower limit side edges form a lower limit groove;

[0014] The upper limit groove and the lower limit groove surround the accommodating cavity.

[0015] Optionally, the upper limit edge includes two upper plates spaced apart from each other, both of which are fixedly connected to the upper shell, and a gap between the two upper plates communicates with the upper limit slot and the outer side of the upper shell;

[0016] The lower limit top edge includes two lower top plates spaced apart from each other, both lower top plates are fixedly connected to the lower shell, and the gap between the two lower top plates communicates with the lower limit groove and the outer side of the lower shell;

[0017] The two upper top plates and the two lower top plates are aligned respectively, and the gap between the two upper top plates and the gap between the two lower top plates form a plug hole.

[0018] Optionally, the flow opening includes a hydrophone opening, an inner wall hollow opening, and a bottom wall hollow opening;

[0019] The upper limit bottom edge includes two upper bottom plates spaced apart from each other, both of which are fixedly connected to the upper shell; the lower limit bottom edge includes two lower bottom plates spaced apart from each other, both of which are fixedly connected to the lower shell; the two upper bottom plates and the two lower bottom plates form a hydrophone accommodating cavity for accommodating the hydrophone, and the hydrophone port is located on the side wall of the hydrophone accommodating cavity;

[0020] The upper supporting wall and the lower supporting wall each include a plurality of linearly spaced supporting units, and the inner wall hollow openings are distributed in the gaps between any two adjacent supporting units;

[0021] The bottom wall hollow openings are distributed on the bottom wall of the upper shell and the bottom wall of the lower shell.

[0022] Optionally, it further includes a corrosion anode, which is provided with an external thread; the shell body is made of metal, and an anode thread hole is opened on the shell body, and the corrosion anode is screwed and installed in the anode thread hole;

[0023] A number of staggered limiting protrusions and limiting recesses are distributed on both sides of the outer wall of the upper shell facing away from the lower shell, as well as on both sides of the outer wall of the lower shell facing away from the upper shell. The limiting protrusions on the upper shell are positioned opposite to the limiting recesses on the lower shell, and the limiting recesses on the upper shell are positioned opposite to the limiting protrusions on the lower shell, and the sizes of the limiting protrusions and limiting recesses match.

[0024] A seabed node assembly comprises a seabed node and an outer protective shell for the seabed node as shown in any one of the above items, wherein the seabed node is installed in an accommodating cavity.

[0025] The technical solution of this application has the following advantages over the prior art:

[0026] The deployment column is positioned inside the main shell, with a deployment opening provided in the shell. When deployment or retrieval operations are required, a rope or hook can be extended through the deployment opening and passed around the deployment column for connection. Because the deployment column is located inside the main shell, it is less susceptible to external impact and breakage, preventing the seabed node from falling off. Furthermore, when the upper and lower shells are fastened together, the connecting column is simultaneously assembled and secured with the upper and lower plug-in terminals, making installation quick and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1This is a schematic diagram of the overall structure of the submarine node assembly;

[0029] Figure 2 This is a schematic diagram of the internal structure of the submarine node assembly;

[0030] Figure 3 It is a schematic diagram of the expanded structure of the upper shell and the lower shell;

[0031] Figure 4 It is a schematic diagram of the side structure of the shell body.

[0032] Icons: 1. Upper shell; 101. Upper placement notch; 102. Upper convex edge; 103. Upper limit top edge; 104. Upper limit bottom edge; 105. Upper limit side edge; 106. Upper support wall; 107. Upper limit slot; 108. Upper top plate; 109. Upper bottom plate; 2. Lower shell; 201. Lower placement notch; 202. Lower convex edge; 203. Lower limit top edge; 204. Lower limit bottom edge; 205. Lower limit side edge; 206. Lower support wall; 207. Lower limit slot; 208. Lower top plate; 209 , lower base plate; 3, deployment column; 301, upper plug end; 302, lower plug end; 303, connecting column; 4, submarine node; 401, hydrophone; 402, multi-core plug; 10, accommodating cavity; 11, deployment opening; 12, positioning protrusion; 13, positioning groove; 14, plug hole; 15, hydrophone opening; 16, inner wall hollow opening; 17, bottom wall hollow opening; 18, hydrophone accommodating cavity; 19, supporting unit; 20, corrosion anode; 21, anode threaded hole; 22, limiting protrusion; 23, limiting pit. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0034] Example 1:

[0035] This embodiment provides an outer protective shell for a submarine node. Figures 1 to 3 As shown, the housing includes a main body. The main body includes an upper shell 1 and a lower shell 2 that are detachably connected to each other. The interior of the upper shell 1 and the interior of the lower shell 2 form a receiving cavity 10 for accommodating the submarine node 4. Because the submarine node 4 needs to be in contact with the water, the housing body is provided with a flow port connected to the receiving cavity 10 to allow water to enter.

[0036] On the basis of the above structure, it also includes a laying column 3, which includes an upper plug-in end 301, a lower plug-in end 302 and a connecting column 303. The upper plug-in end 301 is located on the inner wall of the upper shell 1, and the lower plug-in end 302 is located on the inner wall of the lower shell 2. The upper plug-in end 301 and the lower plug-in end 302 are arranged opposite to each other, and the two ends of the connecting column 303 are respectively plugged and fixed with the upper plug-in end 301 and the lower plug-in end 302. A laying opening 11 is provided on the side wall of the outer shell body, and the laying column 3 is arranged opposite to the laying opening 11. When a laying or recovery operation is required, a rope or hook can be extended into the laying opening 11 and connected around the laying column 3. Since the laying column 3 is located inside the outer shell body, the laying column 3 is not easily broken by external collisions, and will not cause the seabed node 4 to fall off. At the same time, when the upper shell 1 and the lower shell 2 are buckled and connected to each other, the connecting column 303 can be assembled and fixed with the upper plug end 301 and the lower plug end 302 at the same time, and the installation is quick.

[0037] In this embodiment, based on Figure 2 and Figure 3 As shown, the upper plug-in end 301 and the lower plug-in end 302 are both plug-in holes, and the two ends of the connecting column 303 are respectively plugged into the corresponding plug-in holes. First plug one end of the connecting column 303 into one of the plug-in holes, snap-fit the upper shell 1 and the lower shell 2, and plug the second plug-in hole into the other end of the plug-in column to complete the installation. When the upper shell 1 and the lower shell 2 are disassembled, the connecting column 303 can also be directly separated from the upper plug-in end 301 or the lower plug-in end 302, which is easy to operate. The connecting column 303 is limited between the two plug-in holes. Even if the connecting column 303 becomes axially loose or there is a certain fitting gap between the connecting column 303 and the plug-in hole, the connecting column 303 will not fall off, thereby ensuring the stability of the structure of the deployment column 3 and reducing the risk of falling off.

[0038] Of course, the structures of the connecting column 303 and the upper plug-in end 301 and the lower plug-in end 302 can also be swapped, that is, the upper plug-in end 301 and the lower plug-in end 302 are both plug-in columns, the connecting column 303 has a cylindrical structure, and the two ends of the connecting column 303 are respectively plugged into the outside of the corresponding plug-in columns, and the effect remains unchanged.

[0039] An upper placement notch 101 is defined at the edge where the upper shell 1 and the lower shell 2 meet, and a lower placement notch 201 is defined at the edge where the lower shell 2 and the upper shell 1 meet. The upper placement notch 101 and the lower placement notch 201 face each other and form a placement opening 11. The upper placement notch 101 and the lower placement notch 201 fully expose the placement opening 3, making it easy for the rope to pass through and the hook to hook onto.

[0040] Further, based on Figures 1 to 3As shown, upper housing 1 is provided with upper flanges 102 on both sides, and lower housing 2 is provided with lower flanges 202 on both sides corresponding to the two upper flanges 102. The upper flanges 102 and the corresponding lower flanges 202 are provided with bolt holes facing each other. The upper flanges 102 and the lower flanges 202 are attached to each other and bolted together to achieve a detachable connection between the upper housing 1 and the lower housing 2. The upper flanges 102 and the lower flanges 202 can also serve as handles for easy transportation.

[0041] The sidewalls where the upper flange 102 and the lower flange 202 meet are respectively provided with positioning protrusions 12 and positioning grooves 13, and the positioning protrusions 12 are inserted into the positioning grooves 13. The design of the positioning protrusions 12 and positioning grooves 13 facilitates the alignment of the upper shell 1 and the lower shell 2, and facilitates the alignment of the bolt holes on the upper flange 102 and the lower flange 202.

[0042] Further, based on Figure 2 and Figure 3 As shown, the inner top wall of the upper shell 1 is fixedly connected to an upper limit top edge 103, the inner bottom wall of the upper shell 1 is fixedly connected to an upper limit bottom edge 104, the opposite left and right inner side walls of the upper shell 1 are fixedly connected to upper limit side edges 105, and the inner wall of the upper shell 1 facing the lower shell 2 is fixedly connected to an upper support wall 106. The upper limit top edge 103, the upper limit bottom edge 104, the upper support wall 106, and the two sets of upper limit side edges 105 form an upper limit groove 107. At the same time, the inner top wall of the lower shell 2 is fixedly connected to a lower limit top edge 203, the inner bottom wall of the lower shell 2 is fixedly connected to a lower limit bottom edge 204, the opposite left and right inner side walls of the lower shell 2 are fixedly connected to lower limit side edges 205, and the inner wall of the lower shell 2 facing the upper shell 1 is fixedly connected to a lower support wall 206. The lower limit top edge 203, the upper limit bottom edge 104, the lower support wall 206 and the two groups of lower limit side edges 205 are surrounded by a lower limit groove 207. The upper limit groove 107 and the lower limit groove 207 surround the accommodating cavity 10. When the seabed node 4 is placed in the accommodating cavity 10, the seabed node 4 is fixed by the upper limit top edge 103, the upper limit bottom edge 104, the upper limit side edge 105, the upper support wall 106, the lower limit top edge 203, the lower limit bottom edge 204, the lower limit side edge 205 and the lower support wall 206 to prevent shaking. It should be noted that in the description, the inner top wall, the inner bottom wall and the left and right inner side walls are all based on Figure 2 and Figure 3 The directions shown are relative to the side walls.

[0043] Furthermore, the upper limit edge 103 includes two upper top plates 108 spaced apart from each other. Both upper top plates 108 are fixedly connected to the upper shell 1, and the gap between the two upper top plates 108 communicates with the upper limit slot 107 and the outer side of the upper shell 1. The lower limit edge 203 includes two lower top plates 208 spaced apart from each other. Both lower top plates 208 are fixedly connected to the lower shell 2, and the gap between the two lower top plates 208 communicates with the lower limit slot 207 and the outer side of the lower shell 2. The two upper top plates 108 and the two lower top plates 208 are aligned, and the gap between the two upper top plates 108 and the gap between the two lower top plates 208 form a plug hole 14. The plug hole 14 is used to align with the multi-core plug 402 of the submarine node 4, so that operations such as charging or data downloading of the submarine node 4 can be performed without removing the submarine node 4 from the shell body.

[0044] Further, based on Figures 1 to 3 As shown, the flow port includes a hydrophone port 15, an inner wall hollow port 16 and a bottom wall hollow port 17. The upper limit bottom edge 104 includes two upper bottom plates 109 spaced apart from each other, and the two upper bottom plates 109 are fixedly connected to the upper shell 1. The lower limit bottom edge 204 includes two lower bottom plates 209 spaced apart from each other, and the two lower bottom plates 209 are fixedly connected to the lower shell 2. The two upper bottom plates 109 and the two lower bottom plates 209 form a hydrophone accommodating chamber 18 for accommodating the hydrophone 401. When the seabed node 4 is installed in the accommodating chamber 10, its hydrophone 401 is just placed in the hydrophone accommodating chamber 18. The hydrophone port 15 is located on the side wall of the hydrophone accommodating chamber 18 to ensure good communication between the hydrophone 401 and the external water body, achieve barrier-free contact, and ensure better signal pickup effect. Preferably, the side walls of the upper shell 1 and the side walls of the lower shell 2 are both provided with hydrophone ports 15 to ensure the consistency of the internal and external water bodies when the external water body circulates.

[0045] At the same time, both the upper support wall 106 and the lower support wall 206 include a plurality of linearly spaced support units 19, for example, five or six. Inner wall openings 16 are located in the gaps between any two adjacent support units 19, and bottom wall openings 17 are located in the bottom walls of the upper shell 1 and the lower shell 2. Through the above design, the placement opening 11 and the bottom wall opening 17 vertically penetrate the entire shell body, while the hydrophone opening 15 and the inner wall opening 16 extend front to back through the entire shell body. This ensures that the internal water flow in multiple directions is synchronized, and the water inside and outside the shell body changes synchronously, ensuring the accuracy of the signal pickup effect.

[0046] Further, based on Figures 1 to 3As shown, it also includes a corrosion anode 20, which is provided with an external thread. The outer shell body is made of metal, and an anode threaded hole 21 is opened on the outer shell body. The corrosion anode 20 is screwed and installed in the anode threaded hole 21. The strength and impact resistance of the metal shell are relatively strong. However, since it is easy to corrode in seawater, the corrosion anode 20 is installed on the outer shell body to protect the outer shell body by sacrificing the corrosion anode 20. In this embodiment, the upper shell 1 and the lower shell 2 are made of aluminum alloy and are made of aluminum casting process, and the surface is coated with electrophoretic paint film. The corrosion anode 20 can be made of magnesium alloy. Of course, the outer shell body can also be made of common metals such as iron alloy and copper alloy, and the corrosion anode 20 can be made of common anode sacrificial materials such as aluminum alloy and zinc alloy, which can also achieve the same protection effect. The sacrificial anode is installed by threading, which is convenient for replacement.

[0047] Further, based on Figure 1 and Figure 4 As shown, both sides of the outer wall of the upper shell 1 facing away from the lower shell 2, and both sides of the outer wall of the lower shell 2 facing away from the upper shell 1, are distributed with a plurality of staggered limiting protrusions 22 and limiting recesses 23, for example, three or four. The limiting protrusions 22 on the upper shell 1 are positioned opposite the limiting recesses 23 on the lower shell 2, and the limiting recesses 23 on the upper shell 1 are positioned opposite the limiting protrusions 22 on the lower shell 2. The sizes of the limiting protrusions 22 and limiting recesses 23 match. When multiple shell bodies are stacked, the limiting protrusions 22 and limiting recesses 23 of two adjacent shell bodies are aligned with each other to prevent side slipping or falling off. Preferably, the outer walls of the upper shell 1 and the lower shell 2 are each provided with three limiting protrusions 22 and three limiting recesses 23, and the three limiting protrusions 22 and three limiting recesses 23 are distributed in a triangular shape. When the upper shell 1 or the lower shell 2 is placed on the ground, the three limiting protrusions 22 act as supporting feet to ensure stable placement on the ground, ensuring the stability of product assembly or serving as a stable stacking base.

[0048] Example 2:

[0049] This embodiment provides a submarine node assembly based on Figure 1 and Figure 2 As shown, it includes a seabed node 4 and the outer protective shell for the seabed node shown in Example 1, and the seabed node 4 is installed in the accommodating cavity 10.

[0050] During the deployment, recovery and transportation of the submarine node assembly, since the deployment column 3 is located inside the shell body, the deployment column 3 is not easily broken by external collisions, which will not cause the submarine node assembly to fall off.

[0051] The method of using the submarine node assembly shown in this embodiment is as follows:

[0052] Place the lower shell 2 on the mounting table, plug one end of the connecting column 303 into the lower plug-in end 302, and place the submarine node 4 in the lower limit groove 207. Snap the upper shell 1 onto the top of the lower shell 2, plug the upper plug-in end 301 into the end of the connecting column 303 away from the lower plug-in end 302, snap the upper limit groove 107 onto the top of the submarine node 4, and fit the upper flange 102 and the lower flange 202 to each other and align them through the positioning protrusion 12 and the positioning groove 13. Connect the upper flange 102 and the lower flange 202 with bolts to complete the assembly of the submarine node assembly. During transportation, when multiple submarine node assemblies need to be stacked, the limit protrusions 22 and limit grooves of the two adjacent layers of submarine node assemblies are docked with each other to prevent side slipping or falling off. Use external equipment such as ropes or hooks to bypass the deployment column 3 to carry out the deployment or recovery operation of the submarine node 4.

[0053] When the subsea node assembly is underwater, the bottom wall opening 17, hydrophone port 15, and inner wall opening 16 ensure multi-directional water flow, ensuring synchronized changes in the water inside and outside the housing, and ensuring accurate signal pickup. The metal housing is protected by corrosion anodes 20 to reduce the effects of seawater corrosion.

[0054] After the submarine node assembly is recovered, the submarine node 4 can be charged or data can be downloaded through the multi-core plug 402 exposed at the plug hole 14. The corrosion anode 20 can be updated by replacing the threaded corrosion anode 20.

[0055] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An outer protective shell for a submarine node, comprising a shell body, the shell body comprising an upper shell (1) and a lower shell (2) detachably connected to each other, the interior of the upper shell (1) and the interior of the lower shell (2) enclosing an accommodating cavity (10) for accommodating a submarine node (4), the shell body being provided with a flow port communicating with the accommodating cavity (10) for allowing water to enter; Its characteristics are: The invention also includes a placement column (3), the placement column (3) including an upper plug-in end (301), a lower plug-in end (302) and a connecting column (303); the upper plug-in end (301) is located on the inner wall of the upper shell (1), the lower plug-in end (302) is located on the inner wall of the lower shell (2), the upper plug-in end (301) and the lower plug-in end (302) are arranged opposite to each other, and the two ends of the connecting column (303) are respectively plugged and fixed to the upper plug-in end (301) and the lower plug-in end (302); the side wall of the shell body is provided with a placement opening (11), and the placement column (3) is arranged opposite to the placement opening (11).

2. The outer protective shell for a submarine node according to claim 1, characterized in that: The upper plug-in end (301) and the lower plug-in end (302) are both plug-in holes, and the two ends of the connecting column (303) are respectively plugged into the corresponding plug-in holes.

3. The outer protective shell for a submarine node according to claim 1, characterized in that: The upper plug-in end (301) and the lower plug-in end (302) are both plug-in posts, the connecting post (303) is a cylindrical structure, and the two ends of the connecting post (303) are respectively plugged into the outer sides of the corresponding plug-in posts.

4. The outer protective shell for a submarine node according to any one of claims 1 to 3, characterized in that: An upper placement notch (101) is provided at the edge where the upper shell (1) and the lower shell (2) meet, and a lower placement notch (201) is provided at the edge where the lower shell (2) and the upper shell (1) meet. The upper placement notch (101) and the lower placement notch (201) are opposite to each other and enclose the placement opening (11).

5. The outer protective shell for a submarine node according to claim 1, characterized in that: Both sides of the upper shell (1) are provided with upper flanges (102), and both sides of the lower shell (2) are provided with lower flanges (202) corresponding to the two upper flanges (102), and the upper flanges (102) and the corresponding lower flanges (202) are provided with bolt holes opposite to each other, and the upper flanges (102) and the lower flanges (202) are attached to each other and bolted together; the side walls of the upper flanges (102) and the lower flanges (202) that are attached to each other are respectively provided with positioning protrusions (12) and positioning grooves (13), and the positioning protrusions (12) are inserted into the positioning grooves (13).

6. The outer protective shell for a submarine node according to claim 1, characterized in that: The inner top wall of the upper shell (1) is fixedly connected to an upper limit top edge (103), the inner bottom wall of the upper shell (1) is fixedly connected to an upper limit bottom edge (104), the left and right inner side walls opposite to each other of the upper shell (1) are fixedly connected to upper limit side edges (105), the inner wall of the upper shell (1) facing the lower shell (2) is fixedly connected to an upper support wall (106), and the upper limit top edge (103), the upper limit bottom edge (104), the upper support wall (106) and the two groups of the upper limit side edges (105) form an upper limit groove (107); The inner top wall of the lower shell (2) is fixedly connected to a lower limit top edge (203), the inner bottom wall of the lower shell (2) is fixedly connected to a lower limit bottom edge (204), the left and right inner side walls opposite to each other of the lower shell (2) are fixedly connected to lower limit side edges (205), the inner wall of the lower shell (2) facing the upper shell (1) is fixedly connected to a lower support wall (206), and the lower limit top edge (203), the upper limit bottom edge (104), the lower support wall (206) and the two groups of the lower limit side edges (205) form a lower limit groove (207); The upper limit groove (107) and the lower limit groove (207) surround the accommodating cavity (10).

7. The outer protective shell for a submarine node according to claim 6, characterized in that: The upper limit top edge (103) comprises two upper top plates (108) spaced apart from each other, the two upper top plates (108) are fixedly connected to the upper shell (1), and the gap between the two upper top plates (108) communicates with the upper limit slot (107) and the outer side of the upper shell (1); The lower limit top edge (203) comprises two lower top plates (208) spaced apart from each other, the two lower top plates (208) are fixedly connected to the lower shell (2), and the gap between the two lower top plates (208) communicates with the lower limit groove (207) and the outer side of the lower shell (2); The two upper top plates (108) and the two lower top plates (208) are aligned respectively, and the gap between the two upper top plates (108) and the gap between the two lower top plates (208) form a plug hole (14).

8. The outer protective shell for a submarine node according to claim 6, characterized in that: The flow port includes a hydrophone port (15), an inner wall hollow port (16) and a bottom wall hollow port (17); The upper limit bottom edge (104) includes two upper bottom plates (109) spaced apart from each other, and both of the upper bottom plates (109) are fixedly connected to the upper shell (1); the lower limit bottom edge (204) includes two lower bottom plates (209) spaced apart from each other, and both of the lower bottom plates (209) are fixedly connected to the lower shell (2); the two upper bottom plates (109) and the two lower bottom plates (209) enclose a hydrophone accommodating cavity (18) for accommodating a hydrophone (401), and the hydrophone port (15) is located on a side wall of the hydrophone accommodating cavity (18); The upper support wall (106) and the lower support wall (206) each include a plurality of support units (19) arranged linearly and spaced apart, and the inner wall hollow openings (16) are distributed at the gaps between any two adjacent support units (19); The bottom wall hollow openings (17) are distributed on the bottom wall of the upper shell (1) and the bottom wall of the lower shell (2).

9. The outer protective shell for a submarine node according to claim 1, characterized in that: It also includes a corrosion anode (20), the corrosion anode (20) is provided with an external thread; the shell body is made of metal, the shell body is provided with an anode thread hole (21), and the corrosion anode (20) is screwed and installed in the anode thread hole (21); A plurality of staggeredly arranged limiting protrusions (22) and limiting recesses (23) are distributed on both sides of the outer wall of the upper shell (1) facing away from the lower shell (2), and on both sides of the outer wall of the lower shell (2) facing away from the upper shell (1). The limiting protrusions (22) on the upper shell (1) and the limiting recesses (23) on the lower shell (2) are positioned opposite to each other, and the limiting recesses (23) on the upper shell (1) and the limiting protrusions (22) on the lower shell (2) are positioned opposite to each other, and the sizes of the limiting protrusions (22) and the limiting recesses (23) match each other.

10. A submarine node assembly, characterized by: It comprises a seabed node (4) and an outer protective shell for the seabed node according to any one of claims 1 to 9, and the seabed node (4) is installed in the accommodating cavity (10).

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