Submarine cable in-cabin terminal box and underwater terminal equipment

Abstract

The utility model provides a submarine cable entry terminal box and underwater terminal equipment. The submarine cable in-cabin terminal box comprises a shell structure which comprises a first shell, a second shell and a third shell which are connected in sequence; the first sealing structure is used for sealing gaps among the second shell, the first shell and the armor layer; the second sealing structure is located at one end, close to the third shell, of the second shell, and the second sealing structure is used for sealing a gap between the second shell and the cable core; the optical unit connection assembly is used for connecting optical units of two submarine cables extending into the shell structure from the two ends of the shell structure; and the electric unit connection assembly is located in the third shell, the electric unit connection assembly and the optical unit connection assembly are arranged at an interval, the electric unit connection assembly comprises an insertion part, and the insertion part is constructed to be capable of allowing a cable core to be connected to be inserted and connected. According to the technical scheme of the utility model, electric unit connection can be rapidly carried out, and rapid installation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of submarine cables, in particular to a submarine cable cabin terminal box and underwater terminal equipment. Background Art

[0002] With the accelerated development and utilization of marine resources, various submarine cabins are being used in an endless stream. With the application of cabins, power supply and communication inside the cabins have become an imminent and primary issue. It is urgent to connect submarine cables to the interior of the cabins to provide them with energy and communication, and the application prospects are broad.

[0003] At present, for the power supply and information transmission of underwater integrated systems, the existing submarine cable terminal boxes do not have structures specifically for the connection of optical units and electrical units. Therefore, during actual construction, the input and output requirements of the system are split and classified for underwater sealing and connection transmission. In other words, the two sections of electrical units that need to be connected need to complete the sealing and connection steps underwater, which is complicated to operate and takes a long time to install. Utility Model Content

[0004] The main purpose of the utility model is to provide a submarine cable terminal box and underwater terminal equipment, which can solve the problems of complex operation and long installation time of the submarine cable terminal box in the prior art when connecting electrical units.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a submarine cable entry terminal box is provided, comprising: an outer shell structure, comprising a first shell, a second shell and a third shell connected in sequence; a first sealing structure, located at the connection between the first shell and the second shell, the first sealing structure being used to seal the gap between the second shell, the first shell and the armor layer; a second sealing structure, located at one end of the second shell close to the third shell, the second sealing structure being used to seal the gap between the second shell and the cable core; an optical unit splicing assembly, located in the third shell, the optical unit splicing assembly being used to splice the optical units of two submarine cables extending from both ends of the outer shell structure into the interior of the outer shell structure; an electrical unit splicing assembly, located in the third shell and spaced apart from the optical unit splicing assembly, the electrical unit splicing assembly comprising a plug-in portion, the plug-in portion being constructed to allow the cable core to be spliced ​​to be inserted and spliced.

[0006] Furthermore, the plug-in portion is a slot or a jack.

[0007] Furthermore, the optical unit connection assembly includes: a bottom plate, which is directly or indirectly connected to the third housing; and a fiber splicing tray, which is fixed on the bottom plate and is used to fix the optical unit after the connection is completed.

[0008] Furthermore, the optical unit connection assembly also includes an auxiliary connecting piece, which is used to connect the optical units of the two submarine cables to be connected; and / or, the optical unit connection assembly also includes an auxiliary fixing piece, which is located at the connection of the two optical units to be connected to fix the two optical units to be connected.

[0009] Furthermore, the electrical unit connection assembly includes multiple connection structures, each connection structure includes: a female socket having a first end and a second end arranged opposite to each other; a connector located at the first end of the female socket and connected to the female socket, and a plug-in portion is provided on the connector, which is used for inserting one of the two electrical units to be connected, and the second end of the female socket is constructed to be able to connect to the other of the two electrical units to be connected.

[0010] Furthermore, the electrical unit connection assembly also includes a support structure, which includes: a support member connected to the third shell; a locking member, and the connector and the female socket, as well as the connector and the support member are connected through the locking member.

[0011] Furthermore, the support structure includes two support members spaced apart along the axial direction of the third shell, the support members are provided with an avoidance hole for the female seat to pass through, and the female seat is connected to a limiting member, the outer diameter of the limiting member is larger than the inner diameter of the avoidance hole.

[0012] Furthermore, the submarine cable terminal box also includes: a sleeve, which is located on the side of the third shell away from the second shell and connected to the third shell, and is used for the power supply unit and the optical unit to pass through; a flange, which is located in the sleeve and connected to the sleeve.

[0013] Furthermore, the second sealing structure is provided with a first through hole for the optical unit to pass through and a second through hole for the power supply unit to pass through, and the number of the first through hole and the second through hole are both greater than 3; and / or, the submarine cable terminal box also includes a fixing structure located in the first shell, and the fixing structure is constructed to be able to fix the armor layer of the submarine cable.

[0014] According to one aspect of the present invention, an underwater terminal device is provided, comprising a support seat, the above-mentioned submarine cable terminal box arranged on the support seat, and a bending limit structure connected to the submarine cable terminal box.

[0015] Furthermore, the support seat includes: a seat body; a first clamping member, movably connected to the seat body, and the first clamping member is used to clamp the submarine cable terminal box; a telescopic adjustment member, one end of the telescopic adjustment member is connected to the seat body, and the other end of the telescopic adjustment member is connected to the submarine cable terminal box, and the telescopic adjustment member is constructed to be able to pull the submarine cable terminal box under the action of external force.

[0016] Furthermore, the support seat also includes a second clamping member arranged at a distance from the first clamping member, and the second clamping member is used to clamp the submarine cable terminal box; and / or, a slide groove is provided on one of the seat body and the first clamping member, and a sliding member is provided on the other of the seat body and the first clamping member, and the sliding member slides in cooperation with the slide groove.

[0017] Furthermore, the support seat also includes a first leg and a second leg supported below the seat body and nested with each other, the first leg is slidably arranged relative to the second leg, and the support seat also includes a locking member for locking the first leg in the second leg.

[0018] By applying the technical solution of the present invention, sealing can be achieved through the first sealing structure and the second sealing structure. By arranging the optical unit connection assembly and the electrical unit connection assembly, the submarine cable cabin terminal box can meet the requirements of optical fiber and electrical connection. Since the electrical unit connection assembly includes a plug-in part, the electrical unit to be connected can be inserted into the plug-in part and the connection can be achieved. In this way, during on-site installation, only plugging is required to complete the installation, which meets the requirements of fast on-site installation, greatly reduces the time for on-site terminal entry into the cabin, and reduces the overall construction cycle and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic structural diagram of an underwater terminal device according to an embodiment of the present utility model is shown;

[0021] Figure 2 A cross-sectional view of a submarine cable entry terminal box according to an embodiment of the present invention is shown;

[0022] Figure 3 Shown Figure 2 Schematic diagram of part of the structure of the submarine cable terminal box;

[0023] Figure 4 Shown Figure 2 A schematic diagram of the structure of the optical unit connection assembly of the submarine cable entry terminal box;

[0024] Figure 5 Shown Figure 2 Schematic diagram of the structure of the submarine cable entry terminal box when connecting the optical units of the submarine cable;

[0025] Figure 6 Shown Figure 2 A schematic diagram of the structure of the electrical unit connection assembly of the submarine cable entry terminal box;

[0026] Figure 7Shown Figure 2 Schematic diagram of the structure of the sleeve of the submarine cable terminal box;

[0027] Figure 8 Shown Figure 7 Schematic diagram of the structure of the flange of the sleeve;

[0028] Figure 9 Shown Figure 1 A schematic structural diagram of a support base for an underwater terminal device;

[0029] Figure 10 Shown Figure 9 A structural schematic diagram of another state of the support base.

[0030] The above drawings include the following reference numerals:

[0031] 11. First shell; 12. Second shell; 13. Third shell; 20. Fixing structure; 21. First sealing structure; 22. Second sealing structure; 30. Optical unit connection assembly; 31. Bottom plate; 32. Fiber splicing tray; 33. Auxiliary fixing member; 40. Electrical unit connection assembly; 41. Female socket; 42. Connector; 44. Support member; 45. Limiting member; 50. Connecting part; 60. Sleeve; 61. Flange; 100. Bending limiting structure; 200. Support seat; 201. Seat body; 2011. First leg; 2012. Second leg; 202. First clamping member; 203. Telescopic adjustment member; 204. Second clamping member; 205. Slide groove. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that the submarine cable terminal box of the present invention is not only used for submarine cables, but can also be used for the sealing protection of other cables entering the cabin.

[0034] See also Figure 1As shown, the utility model provides a submarine cable entry terminal box, including: an outer shell structure, including a first shell 11, a second shell 12 and a third shell 13 connected in sequence; a first sealing structure 21, located at the connection between the first shell 11 and the second shell 12, the first sealing structure 21 is used to seal the gap between the second shell 12, the first shell 11 and the armor layer; a second sealing structure 22, located at one end of the second shell 12 close to the third shell 13, the second sealing structure 22 is used to seal the gap between the second shell 12 and the cable core; an optical unit splicing assembly 30, located in the third shell 13, the optical unit splicing assembly 30 is used to splice the optical units of two submarine cables extending from the two ends of the outer shell structure into the inner part of the outer shell structure; an electrical unit splicing assembly 40, located in the third shell 13 and spaced apart from the optical unit splicing assembly 30, the electrical unit splicing assembly 40 includes a plug-in portion 50, and the plug-in portion 50 is constructed to allow the cable core to be spliced ​​to be inserted and spliced.

[0035] Through the above-mentioned arrangement, sealing can be achieved through the first sealing structure 21 and the second sealing structure 22. By arranging the optical unit connection assembly 30 and the electrical unit connection assembly 40, the submarine cable cabin terminal box can meet the requirements of optical fiber and electrical connection. Since the electrical unit connection assembly 40 includes a plug-in portion, the electrical unit to be connected can be inserted into the plug-in portion and connection can be achieved. A "plug-in" connection method is adopted. In this way, during on-site installation, only plugging is required to complete the installation, which meets the requirements of fast on-site installation, greatly reduces the time for on-site terminal entry into the cabin, and reduces the overall construction cycle and cost.

[0036] like Figure 2 and Figure 3 As shown, in the embodiment of the present invention, the submarine cable terminal box further includes a fixing structure 20 located in the first shell 11, and the fixing structure 20 is configured to fix the armor layer of the submarine cable.

[0037] In the above technical solution, the fixing structure includes steel wire and glue. A glue injection hole is opened on the first shell 11, and glue is injected into the first shell 11 through the glue injection hole. After the glue solidifies, it can cooperate with the steel wire to fix and seal the armor layer.

[0038] like Figure 2 and Figure 3 As shown, in an embodiment of the present invention, a first through hole for the light unit to pass through and a second through hole for the power supply unit to pass through are opened on the second sealing structure 22, and the number of the first through hole and the second through hole are both greater than 3.

[0039] In the above technical solution, the first sealing structure 21 includes a sealing ring to seal the gap between the second shell 12, the first shell 11, and the armor layer. The second sealing structure 22 includes a sealing end cap with a receiving groove. The receiving groove contains a conical sealing ring and an O-ring to seal the gap between the second shell 12 and the cable core. The sealing end cap has multiple through-holes, through which the cable core passes in phases. That is, a single optical unit and a single electrical unit pass through the sealing end cap through corresponding through-holes. The first sealing structure 21 and the second sealing structure 22 can achieve mechanical sealing.

[0040] Through the above arrangement, the submarine cable terminal box of the present application can connect submarine cables with more than three cores, preferably with six cores.

[0041] In one embodiment of the present invention, the first sealing structure 21 and the second sealing structure 22 are not limited to the above structures, and other sealing forms, such as glue vulcanization, may also be used.

[0042] In the embodiment of the present invention, the plug-in portion 50 is a slot or a jack, into which the electrical unit or optical unit to be connected can be inserted to achieve connection.

[0043] like Figure 4 and Figure 5 As shown, in the embodiment of the present invention, the optical unit splicing assembly 30 includes: a base plate 31 directly or indirectly connected to the third housing 13; a fiber splicing tray 32 fixed on the base plate 31, and the fiber splicing tray 32 is used to fix the optical unit after the splicing is completed.

[0044] Through the above arrangement, after the two optical units are connected, they are fixed on the fiber splicing tray 32, and the fiber splicing tray 32 can fix the connected optical units. The mechanical connection method is adopted, which can be quickly installed.

[0045] The above-mentioned mechanical connection method belongs to the existing technology and will not be described in detail here.

[0046] In an embodiment of the present invention, the optical unit connection assembly 30 further includes an auxiliary connection piece, which is used to connect the optical units of two submarine cables to be connected.

[0047] In the above technical solution, the auxiliary connector is a 24-core connector, which enables the optical unit to be connected using an MPO connection, achieving rapid connection of the optical unit and improving on-site installation speed. The specific operation steps of the MPO connection and the specific structure of the 24-core connector are prior art and will not be repeated here.

[0048] like Figure 5As shown, in the embodiment of the present invention, the optical unit connection assembly 30 further includes an auxiliary fixing member 33. The auxiliary fixing member 33 is located at the connection of the two optical units to be connected to fix the two optical units to be connected.

[0049] In the above technical solution, the auxiliary fixing member 33 is a heat shrink tube, which is wrapped around the connection between the two optical units to be connected. During installation, the heat shrink tube is heated to deform it and fix the two optical units together, thereby improving the connection stability of the two optical units.

[0050] like Figure 2 、 Figure 3 and Figure 6 As shown, in an embodiment of the present invention, the electrical unit connection assembly 40 includes a plurality of connection structures, each of which includes: a female socket 41 having a first end and a second end relatively arranged; a connector 42, located at the first end of the female socket 41 and connected to the female socket 41, and a plug-in portion 50 is provided on the connector 42, and the plug-in portion 50 is used for inserting one of the two electrical units to be connected, and the second end of the female socket 41 is constructed to be able to connect to the other of the two electrical units to be connected.

[0051] In the above technical solution, the plug-in portion 50 is a socket provided on the connector 42, so that one of the two electrical units is connected to the other electrical unit after being inserted into the socket to achieve connection. The "plug-in" connection method can be quickly installed.

[0052] In one embodiment of the present invention, the female socket 41 and the connector 42 are both made of epoxy material, and the two electrical units can be connected to achieve electrical recovery.

[0053] like Figure 2 、 Figure 3 and Figure 6 As shown, in an embodiment of the present invention, the electrical unit connection assembly 40 also includes a support structure, which includes: a support member 44, which is connected to the third shell 13; a locking member, and the connector 42 and the female socket 41 and the connector 42 and the support member 44 are connected by locking members.

[0054] In the above technical solution, each connector 42 of the connecting structure is fixedly connected to the support member 44 by a locking member. The support member 44 is a support plate connected to the third housing 13, and the locking member is a locking screw. The connector 42 and the female socket 41 are also fixed by a locking screw.

[0055] like Figure 2 、 Figure 3 and Figure 6As shown, in an embodiment of the present utility model, the support structure includes two support members 44 spaced apart along the axial direction of the third shell 13, and an avoidance hole is provided on the support member 44 for the female seat 41 to pass through. A limiting member 45 is connected to the female seat 41, and the outer diameter of the limiting member 45 is larger than the inner diameter of the avoidance hole.

[0056] In the above technical solution, the female seat 41 is arranged between the two support members 44 and passed through the corresponding two avoidance holes. Each connection structure includes two limiting members 45. The limiting member 45 is a flange connected to the female seat 41. Since the outer diameter of the limiting member 45 is larger than the inner diameter of the avoidance hole, the female seat 41 can be limited to prevent the female seat 41 from moving relative to the support member 44.

[0057] like Figure 7 and Figure 8 As shown, in an embodiment of the present utility model, the submarine cable entry terminal box also includes: a sleeve 60, which is located on the side of the third shell 13 away from the second shell 12 and is connected to the third shell 13, and the sleeve 60 is used for the power supply unit and the optical unit to pass through; a flange 61, which is located in the sleeve 60 and connected to the sleeve 60.

[0058] In the above technical solution, the optical unit and electrical unit located within the third housing 13 pass through the third housing 13 and enter the sleeve 60. The optical unit and electrical unit, which pass through the sleeve 60, can then enter the external functional compartment. This allows for a certain amount of excess space within the sleeve 60 for the cable core (optical unit or electrical unit). The cable core can be left within the sleeve 60 when not needed and pulled out when needed for ease of use. Two flanges 61 are provided, spaced apart in the axial direction of the sleeve 60.

[0059] In one embodiment of the present invention, the flange 61 is made of the same material as the sleeve 60 , and a surfacing process is used on the flange end face to ensure the corrosion resistance of the sealing surface. The sleeve tail end is fixed with a support plate.

[0060] In the embodiment of the present invention, the first housing 11 and the second housing 12 , as well as the second housing 12 and the third housing 13 , are fastened together by bolts, and the mechanical fixing structure is used to increase long-term operational stability.

[0061] like Figure 1 As shown, the present invention further provides an underwater terminal device, including a support base 200, the above-mentioned submarine cable terminal box arranged on the support base 200, and a bending limiting structure 100 connected to the submarine cable terminal box.

[0062] Through the above arrangement, the support seat 200 can support the submarine cable terminal box, and the submarine cable enters the submarine cable terminal box after passing through the bending limiting structure 100.

[0063] The underwater terminal equipment of the present invention has all the technical features and all the technical effects of the above-mentioned submarine cable cabin terminal box, which will not be repeated here.

[0064] In one embodiment of the present invention, the bending limiting structure can be a Haversian type or an integral pre-sheathed type, and the material can be polyurethane, rubber, etc. according to the working conditions; the length of the processed part is adjusted according to the actual working conditions.

[0065] like Figure 9 and Figure 10 As shown, in an embodiment of the present invention, the support seat 200 includes: a seat body 201; a first clamping member 202, which is movably connected to the seat body 201, and the first clamping member 202 is used to clamp the submarine cable terminal box; a telescopic adjustment member 203, one end of the telescopic adjustment member 203 is connected to the seat body 201, and the other end of the telescopic adjustment member 203 is connected to the submarine cable terminal box, and the telescopic adjustment member 203 is constructed to be able to pull the submarine cable terminal box under the action of external force.

[0066] Through the above arrangement, the first clamping member 202 clamps the submarine cable terminal box. In actual operation, Figure 9 As shown, the submarine cable terminal box is vertically salvaged. At this time, the telescopic adjustment member 203 is in an extended state. The telescopic adjustment member 203 is shortened. In this way, the submarine cable terminal box can be adjusted from a vertical state to a horizontal state, as shown in FIG. Figure 10 As shown, one end of the submarine cable entry terminal box can be docked with the bend limit structure, and the other end can be docked with the functional cabin. After the submarine cable entry terminal box enters the docking state, it can be plugged and unplugged horizontally in a fixed state, ensuring connection accuracy and normal operation.

[0067] like Figure 9 and Figure 10 As shown, in the embodiment of the present invention, the support base 200 further includes a second clamping member 204 spaced apart from the first clamping member 202 , and the second clamping member 204 is used to clamp the submarine cable terminal box.

[0068] Through the above arrangement, when the submarine cable terminal box is in a horizontal state, the first clamping member 202 and the second clamping member 204 can jointly support the submarine cable terminal box to ensure stable support.

[0069] In an embodiment of the present invention, the first clamping member 202 and the second clamping member 204 may be a clamp, or a cable tie, or a clamping structure.

[0070] like Figure 9 and Figure 10As shown, in an embodiment of the present invention, a slide groove 205 is provided on one of the base body 201 and the first clamping member 202 , and a sliding member is provided on the other of the base body 201 and the first clamping member 202 , and the sliding member slidably cooperates with the slide groove 205 .

[0071] In the above technical solution, a slide groove 205 is provided on the base body 201, and the slide groove 205 includes a connected vertical section and a horizontal section. The first clamping member 202 is connected to the sliding member. When the submarine cable terminal box is in a vertical state, the first clamping member 202 is located in the vertical section of the slide groove 205. In the process of switching the submarine cable terminal box from a vertical state to a horizontal state, the sliding member slides along the vertical section to the horizontal section.

[0072] like Figure 9 and Figure 10 As shown, in an embodiment of the present invention, the support base 200 also includes a first leg 2011 and a second leg 2012 supported below the base body 201 and nested with each other, the first leg 2011 being slidably arranged relative to the second leg 2012, and the support base 200 also includes a locking member for locking the first leg 2011 in the second leg 2012.

[0073] Through the above arrangement, the height of the support base 200 can be adjusted, so that the height position of the submarine cable terminal box can be adjusted to ensure that the submarine cable terminal box is at the same height as the equipment to be docked, and docked accurately.

[0074] In another embodiment of the present invention, the support base 200 may also be an adjusting screw or a hydraulic system, which can also achieve height adjustment of the submarine cable terminal box.

[0075] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: sealing can be achieved through the first sealing structure and the second sealing structure, and by setting the optical unit connecting assembly and the electrical unit connecting assembly, the submarine cable cabin terminal box can meet the optical fiber and electrical connections. Since the electrical unit connecting assembly includes a plug-in part, the electrical unit to be connected can be inserted into the plug-in part and the connection can be achieved. In this way, during on-site installation, only plugging is required to complete the installation, which meets the needs of fast on-site installation, greatly reduces the time for on-site terminal entry into the cabin, and reduces the overall construction cycle and cost.

[0076] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0077] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A submarine cable terminal box, characterized in that: include: A shell structure comprising a first shell (11), a second shell (12) and a third shell (13) connected in sequence; a first sealing structure (21), located at a connection between the first shell (11) and the second shell (12), the first sealing structure (21) being used to seal a gap between the second shell (12), the first shell (11) and the armor layer; A second sealing structure (22), located at one end of the second shell (12) close to the third shell (13), the second sealing structure (22) being used to seal a gap between the second shell (12) and the cable core; An optical unit connection assembly (30) is located in the third housing (13), and the optical unit connection assembly (30) is used to connect optical units of two submarine cables extending from two ends of the outer shell structure into the inner part of the outer shell structure; The electrical unit connection assembly (40) is located in the third shell (13) and is spaced apart from the optical unit connection assembly (30). The electrical unit connection assembly (40) includes a plug-in portion (50) configured to allow the cable core to be connected to be inserted and connected.

2. The submarine cable terminal box according to claim 1, characterized in that: The plug-in portion (50) is a slot or a socket.

3. The submarine cable terminal box according to claim 1, characterized in that: The optical unit connection assembly (30) comprises: A bottom plate (31) directly or indirectly connected to the third shell (13); A fiber splicing tray (32) is fixed on the bottom plate (31), and the fiber splicing tray (32) is used to fix the optical unit after the connection is completed.

4. The submarine cable terminal box according to claim 3, characterized in that: The optical unit connection assembly (30) further comprises an auxiliary connection piece, wherein the auxiliary connection piece is used to connect the optical units of two submarine cables to be connected; and / or, The optical unit connection assembly (30) further comprises an auxiliary fixing member (33), wherein the auxiliary fixing member (33) is located at the connection between two optical units to be connected, so as to fix the two optical units to be connected.

5. The submarine cable terminal box according to any one of claims 1 to 4, characterized in that: The electrical unit connection assembly (40) comprises a plurality of connection structures, each of which comprises: A female seat (41) having a first end and a second end arranged opposite to each other; A connector (42) is located at a first end of the female socket (41) and connected to the female socket (41); the connector (42) is provided with the plug-in portion (50), and the plug-in portion (50) is used for inserting one of the two electrical units to be connected; the second end of the female socket (41) is constructed to be able to connect to the other of the two electrical units to be connected.

6. The submarine cable terminal box according to claim 5, characterized in that: The electrical unit connection assembly (40) further comprises a support structure, wherein the support structure comprises: A support member (44) connected to the third shell (13); A locking member, wherein the connector (42) and the female seat (41) as well as the connector (42) and the support member (44) are connected via the locking member.

7. The submarine cable terminal box according to claim 6, characterized in that: The support structure comprises two support members (44) spaced apart along the axial direction of the third shell (13), the support members (44) being provided with an escape hole for the female seat (41) to pass through, the female seat (41) being connected with a limiting member (45), the outer diameter of the limiting member (45) being larger than the inner diameter of the escape hole.

8. The submarine cable entry terminal box according to any one of claims 1 to 4, characterized in that: The submarine cable entry terminal box also includes: a sleeve (60), the sleeve (60) being located on a side of the third shell (13) facing away from the second shell (12) and connected to the third shell (13), the sleeve (60) being used for the power supply unit and the light unit to pass through; A flange (61) is located inside the sleeve (60) and connected to the sleeve (60).

9. The submarine cable terminal box according to any one of claims 1 to 4, characterized in that: The second sealing structure (22) is provided with a first through hole for the light unit to pass through and a second through hole for the power supply unit to pass through, and the number of the first through hole and the number of the second through hole are both greater than 3; and / or, The submarine cable entry terminal box further comprises a fixing structure (20) located inside the first shell (11), and the fixing structure (20) is configured to fix the armor layer of the submarine cable.

10. An underwater terminal device, characterized in that: The invention comprises a support seat (200), a submarine cable terminal box according to any one of claims 1 to 9 arranged on the support seat (200), and a bending limiting structure (100) connected to the submarine cable terminal box.

11. The underwater terminal device according to claim 10, characterized in that: The support base (200) comprises: seat(201); A first clamping member (202) is movably connected to the seat body (201), and the first clamping member (202) is used to clamp the submarine cable cabin terminal box; A telescopic adjustment member (203), one end of the telescopic adjustment member (203) is connected to the seat body (201), and the other end of the telescopic adjustment member (203) is connected to the submarine cable cabin terminal box, and the telescopic adjustment member (203) is constructed to be able to pull the submarine cable cabin terminal box under the action of an external force.

12. The underwater terminal device according to claim 11, characterized in that: The support seat (200) further comprises a second clamping member (204) spaced apart from the first clamping member (202), wherein the second clamping member (204) is used to clamp the submarine cable cabin terminal box; and / or, A slide groove (205) is provided on one of the seat body (201) and the first clamping member (202), and a sliding member is provided on the other of the seat body (201) and the first clamping member (202), and the sliding member is slidably matched with the slide groove (205).

13. The underwater terminal device according to claim 11, characterized in that: The support seat (200) further comprises a first leg (2011) and a second leg (2012) supported below the seat body (201) and nested with each other, wherein the first leg (2011) is slidably arranged relative to the second leg (2012), and the support seat (200) further comprises a locking member, which is used to lock the first leg (2011) in the second leg (2012).

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