Modular docking device for an observatory network and method thereof

Abstract

The present application relates to underwater connection device technical field, specifically, relate to a kind of modular connection equipment for subsea observation network and method thereof, including connection box, the outside of several interfaces of connection box is equipped with wiring device, wiring device includes wiring pipe, mobile pipe and a pair of limit telescopic rod arranged in it.The modular connection equipment for subsea observation network and method thereof, adopt the sliding fit of cam groove and protruding block, linear motion is converted into the rotary motion of inner insertion tube, and through the arc slot of rotating cover drive outer protruding rod, make T-shaped block contract along radial direction, trigger clamping portion to automatically lock cable, eliminate the millimeter level fine alignment demand of traditional underwater unmanned aerial vehicle, cable insertion is automatically triggered clamping mechanism, without the investment of additional driving equipment, and positioning time of connection operation is greatly shortened.

Description

Technical Field

[0001] This invention relates to the field of underwater docking device technology, and more specifically, to a modular docking device and method for seabed observation networks. Background Technology

[0002] Subsea connection equipment is a core component of deep-sea engineering, used for connecting underwater pipelines, cables, observation equipment, and transmitting energy signals. Its core technologies include high-pressure sealing, corrosion-resistant materials, and intelligent monitoring modules. It can operate stably under water pressure at a depth of 6,000 meters. The equipment is widely used in oil and gas extraction, such as the Liwan Gas Field, subsea data centers, wind power construction, and scientific research and observation networks.

[0003] Patent application number CN201710643658.8 discloses a connection system and data extraction method based on a combined seabed seismic acquisition node. The connection system enables simultaneous GPS clock synchronization, charging, firmware upgrade, status query, and data communication of the combined seabed seismic acquisition node. The host computer program uses ICMP and FTP protocols to realize an automatic and simultaneous data extraction method for the connected device. After data extraction, the acquired data is resampled and clock error corrected to obtain high-precision clock-synchronized acquisition data.

[0004] However, existing seabed observation network connection equipment relies on millimeter-level manual precision positioning by underwater drones, which takes a long time to operate and is affected by ocean current disturbances. Traditional connection mechanisms lack mechanical locking functions, resulting in weak impact resistance. Cables may accidentally come off in ocean currents greater than 1.5 knots. In addition, the additionally designed auxiliary wiring devices usually require the use of motor or hydraulic drive systems, which have a high failure rate in unstable seabed environments.

[0005] In view of this, we propose a modular connection device and method for seabed observation networks. Summary of the Invention

[0006] The purpose of this invention is to provide a modular connection device and method for seabed observation networks, which converts the linear motion of cable insertion into the rotational motion of the inner tube, and drives the outer protruding rod through the arc groove of the rotating cover to trigger the clamping part to automatically lock the cable, thereby eliminating the millimeter-level precision alignment requirements of traditional underwater drones and solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A modular connection device for a seabed observation network includes a connection box. Several interfaces of the connection box are provided with wiring devices on their outer sides. The wiring devices include wiring pipes, movable pipes disposed inside them, and a pair of limiting telescopic rods.

[0009] The conduit includes an outer tube and an inner tube fitted inside it. The inner wall of the inner tube has several sliding grooves at the front end, and the upper and lower sides of the inner wall of the inner tube are provided with cam grooves near the middle.

[0010] The moving tube includes a circular tube, a funnel cover disposed inside it, a pair of protrusions disposed on the outer wall of the circular tube, a number of clamping parts distributed at the front end of the circular tube, a rotating cover sleeved on the outside of the number of clamping parts, and a number of sliders disposed on the outer wall of the rotating cover and sliding in the groove.

[0011] After the cable is fed into the circular tube by the underwater drone, the locking ring at the end of the cable comes into contact with the funnel cover and squeezes the limiting telescopic rod, causing the circular tube to move backward. The protrusion moves along the cam groove and drives the inner insertion tube to rotate. The slider is moved by the slide groove, which drives the rotating cover to rotate. Several clamping parts retract inward to clamp and fix the cable. The continuously moving circular tube drives the inner insertion tube to insert the cable end into the interface of the connector box.

[0012] In the technical solution of the present invention, the outer sleeve is snapped and fixed to the outer wall of the internal functional box of the connector box, and an annular groove is provided on the inner wall of the outer sleeve near the front end. Several regularly distributed slots connected to the annular groove are provided on the inner wall of the outer sleeve.

[0013] In the technical solution of the present invention, the inner tube is slidably connected to the inside of the outer tube, and the outer wall of the inner tube is integrally formed with a plurality of external protruding rings. The external protruding rings are rotatably connected to the ring groove, and after the inner tube is rotated, the external protruding rings slide into the inside of the slot.

[0014] The above setup uses a rotatable inner tube in conjunction with a movable tube to achieve the process of clamping and connecting the cable.

[0015] In the technical solution of the present invention, a number of regularly distributed limiting grooves with a cross-section of T are provided on the outer wall of the front end of the circular tube. The funnel cover is welded and fixed to the inner wall of the circular tube, and the protrusion is welded and fixed to the outer wall of the circular tube and slidably connected to the inside of the cam groove.

[0016] In the technical solution of the present invention, the clamping part includes a T-shaped block slidably connected inside the limiting groove, an arc-shaped plate welded and fixed to the bottom end of the T-shaped block, and an outwardly protruding rod welded and fixed to the outer wall of the T-shaped block.

[0017] In the technical solution of the present invention, the rotating cover is rotatably connected to the front end of the circular tube, and a number of regularly distributed arc-shaped grooves are provided on the outer wall of the front end of the rotating cover to provide a sliding range for the protruding rod. The slider is welded and fixed to the outer wall of the rotating cover.

[0018] When technicians perform wiring operations, they do not need to frequently adjust the position of the underwater drone. By moving the funnel cover in the tube and the clamping part that automatically clamps the cable when it is inserted, the difficulty of wiring operations is reduced without the need for external drive equipment.

[0019] In the technical solution of the present invention, the limiting telescopic rod includes a fixed tube, a sliding tube sleeved on the outside of the fixed tube, a first spring disposed inside the fixed tube and the sliding tube, a fixed rod snapped and fixed at the center of the rear end wall of the fixed tube, a limiting block welded to the front end of the fixed rod, and a sliding block sliding on the outside of the fixed rod.

[0020] In the technical solution of the present invention, the fixed tube is snapped and fixed to the outer wall of the internal functional box of the connector box, the sliding tube is slidably connected to the outside of the fixed tube, the front and rear ends of the first spring are respectively welded and fixed to the inner tube walls of the sliding tube and the fixed tube, and the transverse cross sections of the limiting block and the sliding block are isosceles trapezoids and symmetrically distributed.

[0021] In the technical solution of the present invention, the limiting telescopic rod further includes an inner protrusion and a second spring disposed in the circular hole at the front end of the sliding tube. The transverse cross section of the inner protrusion is a right trapezoid and is slidably connected to the groove in the circular hole at the front end of the sliding tube. The two ends of the second spring are welded to the outer wall of the inner protrusion and the groove wall of the circular hole of the sliding tube. The elastic force provided by the second spring pushes the inner protrusion to move outward.

[0022] The above-mentioned design, through the inner protrusion, the upper limit block of the fixed rod, and the sliding block, ensures the stability of the cable connection and prevents the cable from falling off due to unexpected circumstances.

[0023] On the other hand, the present invention also provides a modular connection method for a seabed observation network, which uses the above-mentioned modular connection equipment for a seabed observation network and includes the following steps:

[0024] S1. First, the technicians operate the underwater drone, using its robotic arm to grip the cable and move it towards the underwater junction box, and then insert the end of the cable into the round tube of the moving tube.

[0025] S2. Next, the locking ring at the end of the cable comes into contact with the funnel cover and squeezes the limiting telescopic rod, causing the round tube to move backward. The protrusion moves along the cam groove and drives the inner tube to rotate. The slider is moved through the slide groove, driving the rotating cover to rotate.

[0026] S3. Subsequently, the position of the arc groove in the rotating cover and the contact with the protruding rod changes continuously, while the driving T-block moves downward along the limiting groove, thereby clamping and fixing the cable through the arc plate, thus ensuring that the cable end is located at the axis of the connector box interface.

[0027] S4. At this time, several protruding rings on the outer wall of the rotating inner tube move to the slide groove, and as the underwater drone continues to send the cable in, the protruding rings are inserted into the slide groove, thus restricting the rotation of the inner tube.

[0028] S5. After that, the end of the cable is inserted into the interface and the cable is connected. During this process, the sliding tube in the limiting telescopic rod squeezes the first spring and retracts. The limiting block goes deep into the round hole of the sliding tube. The inner protrusion is squeezed by it and retracts into the groove. Then it is reset under the elastic force of the second spring.

[0029] S6. After the underwater drone is removed, when the elastic force of the first spring pushes the sliding tube to reset, the inner protrusion abuts against the limiting block, restricting the fixed position of the sliding tube, thus completing the cable connection operation.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. The modular splicing equipment and method for the seabed observation network adopts the sliding cooperation of cam groove and protrusion to convert the linear motion of cable insertion into the rotational motion of the inner tube. The outer protruding rod is driven by the arc groove of the rotating cover, causing the T-shaped block to retract radially and triggering the clamping part to automatically lock the cable. This eliminates the millimeter-level precision alignment requirements of traditional underwater drones. The clamping mechanism is automatically triggered when the cable is inserted, which not only eliminates the need for additional drive equipment but also significantly shortens the positioning time of the splicing operation.

[0032] 2. The modular connection device and method for the seabed observation network integrates a trapezoidal cross-section limit block and a sliding block into a limit telescopic rod, which, together with a right-angled trapezoidal inner protrusion, forms a stepped locking mechanism. This improves the resistance of the cable connection to the impact of ocean currents, ensures that the connection does not fall off accidentally, and triggers the inner protrusion to disengage from the limit block when the cable is pulled out with a slight depth. The first spring reduces the resistance when unlocking, improving the ease of operation of the underwater drone. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0035] Figure 3 This is a sectional side view of the overall structure of the present invention;

[0036] Figure 4 This is a cross-sectional schematic diagram of the wiring device in this invention;

[0037] Figure 5 This is a cross-sectional view of the wiring conduit in this invention;

[0038] Figure 6This is a cross-sectional schematic diagram of the moving tube structure in this invention;

[0039] Figure 7 This is a cross-sectional schematic diagram of a portion of the structure of the moving tube in this invention;

[0040] Figure 8 This is a schematic diagram of the clamping part in the present invention;

[0041] Figure 9 This is a cross-sectional schematic diagram of the limiting telescopic rod in this invention;

[0042] Figure 10 This is a top-section sectional view of the limiting telescopic rod in this invention;

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Connector box;

[0045] 200. Wiring device; 210. Wiring tube; 211. Outer tube; 2110. Ring groove; 2111. Slot; 212. Inner tube; 2120. Slide groove; 2121. Cam groove; 213. Outer protruding ring; 220. Moving tube; 221. Round tube; 2210. Limiting groove; 222. Funnel cover; 223. Protrusion; 224. Clamping part; 2240. T-block; 2241. Arc plate; 2242. Outer protruding rod; 225. Rotating cover; 2250. Arc groove; 226. Slider; 230. Limiting telescopic rod; 231. Fixed tube; 232. Sliding tube; 233. First spring; 234. Fixed rod; 235. Limiting block; 236. Sliding block; 237. Inner protrusion; 238. Second spring. Detailed Implementation

[0046] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0047] Please see Figures 1-5 As shown, this embodiment provides a technical solution:

[0048] A modular connection device for a seabed observation network includes a connection box 100. Several interfaces of the connection box 100 are provided with wiring devices 200 on their outer sides. The wiring devices 200 include a wiring pipe 210, a movable pipe 220 disposed therein, and a pair of limiting telescopic rods 230.

[0049] Specifically, the wiring conduit 210 includes an outer tube 211 and an inner tube 212 fitted inside it. The inner wall of the inner tube 212 has several sliding grooves 2120 at the front end, and the upper and lower sides of the inner wall of the inner tube 212 are provided with cam grooves 2121 near the middle.

[0050] Furthermore, the outer sleeve 211 is snapped and fixed to the outer wall of the internal functional box of the connector box 100. An annular groove 2110 is provided on the inner wall of the outer sleeve 211 near the front end. Several regularly distributed slots 2111 connected to the annular groove 2110 are provided on the inner wall of the outer sleeve 211.

[0051] Furthermore, the inner tube 212 is slidably connected to the inside of the outer tube 211. The outer wall of the inner tube 212 is integrally formed with several protruding rings 213. The protruding rings 213 are rotatably connected to the ring groove 2110. After the inner tube 212 is rotated, the protruding rings 213 slide into the inside of the slot 2111.

[0052] Furthermore, the outer sleeve 211 is used to ensure the strength of the connector 210, and the center of the outer sleeve 211 is on the same axis as the interface of the internal functional box of the connector box 100. The inner tube 212 can rotate inside the outer sleeve 211 through the outer protruding ring 213. When the outer protruding ring 213 rotates to the slot 2111, the inner tube 212 can slide and connect inside the outer sleeve 211. This setting, through the rotatable inner tube 212, in conjunction with the moving tube 220, realizes the process of clamping and connecting the cable.

[0053] Please see Figures 4-8 As shown, in this embodiment, the moving tube 220 includes a circular tube 221, a funnel cover 222 disposed inside it, a pair of protrusions 223 disposed on the outer wall of the circular tube 221, a plurality of clamping portions 224 distributed at the front end of the circular tube 221, a rotating cover 225 sleeved on the outside of the plurality of clamping portions 224, and a plurality of sliders 226 disposed on the outer wall of the rotating cover 225 and sliding in the slide groove 2120.

[0054] Specifically, the outer wall of the front end of the circular tube 221 is provided with several regularly distributed limiting grooves 2210 with a cross-section in the shape of a T. The funnel cover 222 is welded and fixed to the inner wall of the circular tube 221, and the protrusion 223 is welded and fixed to the outer wall of the circular tube 221 and slidably connected to the inside of the cam groove 2121.

[0055] Furthermore, the clamping part 224 includes a T-shaped block 2240 slidably connected inside the limiting groove 2210, an arc-shaped plate 2241 welded and fixed to the bottom end of the T-shaped block 2240, and an outwardly protruding rod 2242 welded and fixed to the outer wall of the T-shaped block 2240.

[0056] Furthermore, the rotating cover 225 is rotatably connected to the front end of the circular tube 221. Several regularly distributed arc-shaped grooves 2250 are provided on the outer wall of the front end of the rotating cover 225 to provide a sliding range for the protruding rod 2242. The slider 226 is welded and fixed to the outer wall of the rotating cover 225.

[0057] Furthermore, after the cable is fed into the circular tube 221 by the underwater drone, the locking ring at the end of the cable abuts against the funnel cover 222 and presses against the limiting telescopic rod 230, causing the circular tube 221 to move backward. The protrusion 223 moves along the cam groove 2121 and drives the inner insertion tube 212 to rotate. The slider 226 is moved by the sliding groove 2120, driving the rotating cover 225 to rotate. Subsequently, the position of the arc groove 2250 in the rotating cover 225 and the outer protrusion 2242 in contact changes continuously, driving the T-shaped block 2240 to move downward along the limiting groove 2210, and then clamping and fixing the cable through the arc plate 2241. This ensures that the cable end is located on the axis of the interface of the connector box 100. The continuously moving round tube 221 drives the inner insertion tube 212 to insert the cable end into the interface of the connector box 100. In addition, after the cable end is inserted into the interface and energized, the length of its internal pins allows it to continue moving into the interface. This feature eliminates the need for technicians to frequently adjust the position of the underwater drone when performing wiring operations. The funnel cover 222 in the moving tube 220 and the clamping part 224 that automatically clamps the cable when it is inserted reduce the difficulty of wiring operations without the need for external drive equipment.

[0058] Please see Figures 4-10 As shown, in this embodiment, the limiting telescopic rod 230 includes a fixed tube 231, a sliding tube 232 sleeved on the outside of the fixed tube 231, a first spring 233 disposed inside the fixed tube 231 and the sliding tube 232, a fixed rod 234 snapped and fixed at the center of the rear end wall of the fixed tube 231, a limiting block 235 welded to the front end of the fixed rod 234, and a sliding block 236 sliding on the outside of the fixed rod 234.

[0059] Specifically, the fixed tube 231 is snapped and fixed to the outer wall of the internal functional box of the connector box 100, the sliding tube 232 is slidably connected to the outside of the fixed tube 231, the front and rear ends of the first spring 233 are respectively welded and fixed to the inner tube walls of the sliding tube 232 and the fixed tube 231, and the transverse cross sections of the limiting block 235 and the sliding block 236 are isosceles trapezoids and symmetrically distributed.

[0060] Furthermore, the limiting telescopic rod 230 also includes an inner protrusion 237 and a second spring 238 disposed in the round hole at the front end of the sliding tube 232. The transverse cross section of the inner protrusion 237 is a right trapezoid and is slidably connected to the groove in the round hole at the front end of the sliding tube 232. The two ends of the second spring 238 are welded to the outer wall of the inner protrusion 237 and the groove wall of the round hole of the sliding tube 232. The elastic force provided by the second spring 238 pushes the inner protrusion 237 to move outward.

[0061] Furthermore, the size of the sliding block 236 is larger than that of the limiting block 235, and the sliding range of the sliding block 236 is limited by the slightly thicker rod at the rear end of the fixing rod 234. The end of the cable is inserted into the interface, ensuring the cable connection. During this process, the sliding tube 232 in the limiting telescopic rod 230 compresses the first spring 233 and retracts. The limiting block 235 penetrates into the circular hole of the sliding tube 232, and the inner protrusion 237 is compressed and retracts into the groove. Then, it returns to its original position under the elastic force of the second spring 238. After the underwater drone is removed, when the elastic force of the first spring 233 pushes the sliding tube 232 to return to its original position, the inner protrusion 237 and the limiting block 235 retract into the groove. The five-phase contact restricts the fixed position of the sliding tube 232, thus completing the cable connection operation. When the cable needs to be removed, the cable is manipulated to go a short distance, causing the inner protrusion 237 to move to the rear of the sliding block 236. When the cable is subsequently removed, the inner protrusion 237 first drives the sliding block 236 to contact the limiting block 235, and then retracts into the groove, disengaging from the limiting block 235, thereby completing the cable removal operation. This setting, through the design of the inner protrusion 237, the upper limit block 235 of the fixing rod 234, and the sliding block 236, ensures the stability of the cable connection and prevents the cable from falling off due to accidental situations.

[0062] This invention also provides a modular connection method for a seabed observation network, using the aforementioned modular connection equipment for a seabed observation network, comprising the following steps:

[0063] S1. First, the technicians operate the underwater drone, using its robotic arm to hold the cable and move it closer to the underwater junction box 100, and then send the end of the cable into the round tube 221 of the moving tube 220.

[0064] S2. Next, the locking ring at the end of the cable comes into contact with the funnel cover 222 and presses the limiting telescopic rod 230, which drives the round tube 221 to move backward. The protrusion 223 moves along the cam groove 2121 and drives the inner tube 212 to rotate. The slider 226 is moved through the slide groove 2120, which drives the rotating cover 225 to rotate.

[0065] S3. Subsequently, the position of the arc groove 2250 in the rotating cover 225 in contact with the protruding rod 2242 changes continuously, while the driving T-block 2240 moves downward along the limiting groove 2210, thereby clamping and fixing the cable through the arc plate 2241, thus ensuring that the cable end is located at the axis of the interface of the connector box 100.

[0066] S4. At this time, several protruding rings 213 on the outer wall of the rotating inner tube 212 move to the slide groove 2120. As the underwater drone continues to send the cable in, the protruding rings 213 are inserted into the slide groove 2120, thus restricting the rotation of the inner tube 212.

[0067] S5. Insert the end of the cable into the interface and ensure that the cable is connected. During this process, the sliding tube 232 in the limiting telescopic rod 230 squeezes the first spring 233 and retracts. The limiting block 235 penetrates into the round hole of the sliding tube 232. The inner protrusion 237 is squeezed by it and retracts into the groove. Then it is reset under the elastic force of the second spring 238.

[0068] S6. After the underwater drone is removed, when the elastic force of the first spring 233 pushes the sliding tube 232 to reset, the inner protrusion 237 abuts against the limiting block 235, restricting the fixed position of the sliding tube 232, thus completing the cable connection operation.

[0069] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A modular connection device for a seabed observation network, comprising a connection box, characterized in that: The connector box has wiring devices on the outside of several interfaces. The wiring devices include a wiring tube, a movable tube disposed inside it, and a pair of limiting telescopic rods. The conduit includes an outer tube and an inner tube fitted inside it. The inner wall of the inner tube has several sliding grooves at the front end, and the upper and lower sides of the inner wall of the inner tube are provided with cam grooves near the middle. The moving tube includes a circular tube, a funnel-shaped cover disposed inside it, a pair of protrusions disposed on the outer wall of the circular tube, several clamping parts distributed at the front end of the circular tube, a rotating cover sleeved on the outside of the clamping parts, and several sliders disposed on the outer wall of the rotating cover and sliding in the groove. After the cable is sent into the circular tube by the underwater drone, the locking ring at the end of the cable abuts against the funnel-shaped cover and squeezes the limiting telescopic rod, causing the circular tube to move backward. After the protrusions move along the cam groove, they drive the inner insertion tube to rotate. The sliders are moved by the groove, which drive the rotating cover to rotate. After the clamping parts retract inward to clamp and fix the cable, the continuously moving circular tube drives the inner insertion tube to insert the cable end into the interface of the connector box. The limiting telescopic rod includes a fixed tube, a sliding tube sleeved on the outside of the fixed tube, a first spring disposed inside the fixed tube and the sliding tube, a fixed rod snapped and fixed at the center of the rear end wall of the fixed tube, a limiting block welded to the front end of the fixed rod, and a sliding block sliding on the outside of the fixed rod. The limiting telescopic rod also includes an inner protrusion and a second spring disposed in the circular hole at the front end of the sliding tube. The transverse cross section of the inner protrusion is a right trapezoid and is slidably connected to the groove in the circular hole at the front end of the sliding tube. The two ends of the second spring are welded to the outer wall of the inner protrusion and the groove wall of the circular hole of the sliding tube. The elastic force provided by the second spring pushes the inner protrusion to move outward.

2. The modular connection device for a seabed observation network according to claim 1, characterized in that: The outer sleeve is snapped and fixed to the outer wall of the internal functional box of the connector box. An annular groove is provided on the inner wall of the outer sleeve near the front end. Several regularly distributed slots connected to the annular groove are provided on the inner wall of the outer sleeve.

3. The modular connection device for a seabed observation network according to claim 2, characterized in that: The inner tube is slidably connected to the inside of the outer tube. The outer wall of the inner tube is integrally formed with several protruding rings. The protruding rings are rotatably connected to the ring groove. After the inner tube rotates, the protruding rings slide into the inside of the slot.

4. The modular connection device for a seabed observation network according to claim 3, characterized in that: The outer wall of the front end of the circular tube has several regularly distributed limiting grooves with a T-shaped cross-section. The funnel cover is welded and fixed to the inner wall of the circular tube, and the protrusion is welded and fixed to the outer wall of the circular tube and slidably connected to the inside of the cam groove.

5. The modular connection device for a seabed observation network according to claim 4, characterized in that: The clamping part includes a T-shaped block slidably connected inside the limiting groove, an arc-shaped plate welded and fixed to the bottom end of the T-shaped block, and an outwardly protruding rod welded and fixed to the outer wall of the T-shaped block.

6. The modular connection device for a seabed observation network according to claim 5, characterized in that: The rotating cover is rotatably connected to the front end of the circular tube. Several regularly distributed arc-shaped grooves are provided on the outer wall of the front end of the rotating cover to provide a sliding range for the protruding rod. The slider is welded and fixed to the outer wall of the rotating cover.

7. The modular connection device for a seabed observation network according to claim 6, characterized in that: The fixed tube is snapped and fixed to the outer wall of the internal functional box of the connector box. The sliding tube is slidably connected to the outside of the fixed tube. The front and rear ends of the first spring are respectively welded and fixed to the inner tube walls of the sliding tube and the fixed tube. The transverse cross-sections of the limiting block and the sliding block are isosceles trapezoids and symmetrically distributed.

8. A modular connection method for a seabed observation network, using the modular connection device for a seabed observation network as described in claim 7, characterized in that, Includes the following steps: S1. First, the technicians operate the underwater drone, using its robotic arm to grip the cable and move it towards the underwater junction box, and then insert the end of the cable into the round tube of the moving tube. S2. Next, the locking ring at the end of the cable comes into contact with the funnel cover and squeezes the limiting telescopic rod, causing the round tube to move backward. The protrusion moves along the cam groove and drives the inner tube to rotate. The slider is moved through the slide groove, driving the rotating cover to rotate. S3. Subsequently, the position of the arc groove in the rotating cover and the contact with the protruding rod changes continuously, while the driving T-block moves downward along the limiting groove, thereby clamping and fixing the cable through the arc plate, thus ensuring that the cable end is located at the axis of the connector box interface. S4. At this time, several protruding rings on the outer wall of the rotating inner tube move to the slide groove, and as the underwater drone continues to send the cable in, the protruding rings are inserted into the slide groove, thus restricting the rotation of the inner tube. S5. After that, the end of the cable is inserted into the interface and the cable is connected. During this process, the sliding tube in the limiting telescopic rod squeezes the first spring and retracts. The limiting block goes deep into the round hole of the sliding tube. The inner protrusion is squeezed by it and retracts into the groove. Then it is reset under the elastic force of the second spring. S6. After the underwater drone is removed, when the elastic force of the first spring pushes the sliding tube to reset, the inner protrusion abuts against the limiting block, restricting the fixed position of the sliding tube, thus completing the cable connection operation.

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