Seabed-based release device based on discontinuous threads

Abstract

The seabed base release device comprises a first seabed base and a second seabed base, a partition type thread body is connected with the first seabed base, the partition type thread body comprises a body and two sets of thread fan bodies, each set of thread fan body comprises at least three fan blades, and the at least three fan blades are arranged in the circumferential direction of the body at intervals; each fan blade comprises an assembly area and a guide area which are adjacent to each other, and the guide area is contracted; the connecting cabin is fixedly connected with the second seabed base, an assembling cavity is defined in the connecting cabin, two sets of threaded grooves are formed in the inner wall of the assembling cavity, the partition type threaded body is located in the assembling cavity, the partition type threaded body is rotated by a preset angle in the second direction, and the two sets of threaded fan bodies are separated from the two sets of threaded grooves; therefore, the first seabed base and the second seabed base are separated. The seabed base releasing device can quickly, stably and reliably execute the seabed base releasing action, and through limiting cooperation of the threaded body and the connecting cabin, disturbance of complex sea conditions to a measuring instrument can be reduced.

Description

Technical Field

[0001] This invention generally relates to the field of marine observation technology, and specifically to a seabed-based release device based on intermittent threads. Background Technology

[0002] Seabed-based observation systems are monitoring systems that rely on a bottom-mounted platform deployed on the seabed. They integrate various marine environmental monitoring devices or sensors to acquire multiple types of marine environmental elements. These systems enable continuous, fixed-point monitoring of the marine environment and have gained widespread application. Related technologies typically employ a sequential connection method: seabed base - gravity block - release device / buoy. The release device connects the main cable and spare cable to bear the load, and another rope is connected to the buoy for easy recovery of the seabed base. The release device is generally an acoustic release device. During recovery, the buoy is used to pinpoint the specific location of the entire system, and the gravity block allows the cable, which serves as a buffer between the buoy and the seabed base, to sink to the bottom. Simultaneously, it isolates the force on the buoy end from that on the seabed base end, preventing wave impact from causing displacement of the seabed base. After the seabed base is launched, the deployment vessel keeps moving, which allows for the pre-deployment of cables to prevent them from tangling under the impact of underwater waves. At the same time, sufficient length of cable must be left between the gravity block and the seabed base so that the gravity block and the seabed base are spaced apart when they sink to the bottom, thereby preventing the gravity block from hitting the seabed base. When deploying the system, the system can be hoisted down until it is completely submerged in water, and then released to allow it to fall freely.

[0003] In related technologies, during the recovery of seabed foundations, the system can be equipped with two release devices: an acoustic response release system for normal recovery and a timed release system as a backup. Both can control the release mechanism. After the acoustic response release device issues a release command from the surface unit (or when the timed release device reaches its set time), the underwater unit controls the release mechanism to disengage, causing the instrument compartment to float to the surface and be recovered. However, because the acoustic release device is located several meters or tens of meters below the water surface, and the acoustic release is a flexible connection, the transmission quality and reliability of the acoustic signal may be affected by complex underwater terrain, harsh sea conditions, or submarine earthquakes, potentially leading to unreliable release and thus potentially preventing reliable recovery of the seabed foundation. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a seabed base release device based on intermittent threads. The intermittent thread body and the connecting compartment have good structural stability, reducing the impact of complex underwater conditions. By rotating the intermittent thread body in opposite directions, the separation of the first seabed base and the second seabed base can be reliably achieved. Moreover, the separation reliability is high, the operation is simple, and the safety is good.

[0005] In a first aspect, the present invention provides a seabed base release device based on intermittent threads, comprising: a first seabed base and a second seabed base, wherein the first seabed base and the second seabed base are detachably connected by a connecting component; the connecting component includes: The partitioned threaded body is rotatably connected to the first seabed base. The partitioned threaded body includes a body and two sets of threaded fan bodies formed on the body. The two sets of threaded fan bodies are spaced apart on the outer periphery of the body and are arranged opposite to each other in the radial direction of the body. Each set of threaded fan bodies includes at least three fan blades. The at least three fan blades are spaced apart along the axial direction of the body. Each fan blade includes an adjacent assembly area and a guide area. The guide area is constricted along the direction from the assembly area to the guide area. A connecting compartment is fixedly connected to a second seabed base. The connecting compartment contains an assembly cavity. Two sets of threaded grooves are provided on the inner wall of the assembly cavity, spaced apart and arranged radially opposite to each other. When the partition threaded body is located within the assembly cavity, rotating it by a predetermined angle along a first direction causes the two sets of threaded fan bodies and the two sets of threaded grooves to engage and connect the first and second seabed bases. Rotating the partition threaded body by a predetermined angle along a second direction separates the two sets of threaded fan bodies from the two sets of threaded grooves, thus separating the first and second seabed bases. The first and second directions are opposite.

[0006] As an optional solution, the connecting assembly also includes at least three elastic elements, which are evenly distributed between the first seabed base and the second seabed base, and one end of the elastic deformation direction of each elastic element is connected to the first seabed base and the other end is connected to the second seabed base.

[0007] As an optional solution, the side portion of each fan blade away from the main body is tilted towards the main body to form an inclined surface, which is configured as a guide area, and the tilt angle of the inclined surface is 60°-89°.

[0008] As an optional option, the central angle of each set of threaded sector bodies is greater than or equal to 80° and less than 90°.

[0009] As an optional solution, the area on the outer periphery of the body located between the two sets of threaded fan bodies is a smooth area, and the central angle of the smooth area is greater than or equal to 90° and less than or equal to 100°.

[0010] As an optional solution, the connecting assembly also includes a limiting baffle. The limiting baffle is disposed on the inner wall of the assembly cavity. After the partition threaded body is located in the assembly cavity and rotated by a predetermined angle along the second direction, the two sets of threaded fan bodies and the two sets of threaded grooves are separated accordingly. The limiting baffle cooperates with at least one of the threaded fan bodies to stop.

[0011] As an optional solution, the connecting component also includes a limiting protrusion and a limiting groove, one of which is disposed on the first seabed base and the other is disposed on the second seabed base, with the limiting protrusion and the limiting groove engaging in a limiting fit.

[0012] As an optional solution, the connecting compartment includes a hatch cover, and the connecting assembly also includes a seal. The seal is disposed on the hatch cover. After the partition threaded body and the threaded groove are matched and limited, the hatch cover is placed on the opening of the connecting compartment, and the seal is in tight contact with the end face of the partition threaded body.

[0013] As an optional solution, the seabed-based release device also includes a rotary hydraulic cylinder, which is driven by a partitioned threaded body to drive the partitioned threaded body to rotate.

[0014] As an optional solution, an integrated instrument cabin, positioning components, communication components, safety components, and a floating body are installed on the first seabed base, while a rope cabin, measuring equipment, an energy cabin, and a central control unit are installed on the second seabed base.

[0015] The seabed base release device based on intermittent threads of the present invention detachably connects a first seabed base and a second seabed base through a connecting assembly, which facilitates the recovery of the first seabed base. Furthermore, the connecting assembly includes an interrupted threaded body and a connecting chamber. When the interrupted threaded body is rotated in a first direction, the threaded fan-shaped parts spaced apart on the interrupted threaded body and the threaded groove on the inner wall of the assembly cavity of the connecting chamber are in a limiting fit. This fit structure has good stability and reduces the impact of complex underwater conditions. When the interrupted threaded body is rotated in the opposite direction, the threaded fan-shaped parts and the threaded groove separate, which can reliably achieve the separation of the first seabed base and the second seabed base. Moreover, the separation reliability is high, the operation is simple, and the safety is good. Attached Figure Description

[0016] Other features, objectives, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a seabed-based release device based on intermittent threads, according to an embodiment of this application. Figure 2 for Figure 1 Top view; Figure 3 This is a schematic cross-sectional view of the intermittent thread body in a seabed-based release device based on intermittent threads, according to an embodiment of this application. Figure 4 This is a cross-sectional structural diagram of a connecting compartment in a seabed-based release device based on intermittent threads, according to an embodiment of this application. Figure 5This is a schematic diagram of the limiting boss of the first seabed base in a seabed base release device based on intermittent threads, according to an embodiment of this application. Figure 6 This is a schematic diagram of the limiting groove of the first seabed base in a seabed base release device based on intermittent threads, according to an embodiment of this application. In the picture, 1. First seabed base; 2. Second seabed base; 10. Partitioned threaded body; 11. Threaded fan body; 12. Fan blade; 121. Assembly area; 122. Guide area; 20. Connecting compartment; 21. Assembly cavity; 22. Threaded groove; 23. Limiting baffle; 24. Hatch cover; 30. Elastic element; 40. Limiting protrusion; 50. Limiting groove; 60. Rotary hydraulic cylinder. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] In related technologies, the release action is typically performed using a buoy-acoustic release device-seabed base. The acoustic release device is located several meters or tens of meters below the water surface. Because acoustic release is a flexible connection, complex underwater topography, harsh sea conditions, and submarine earthquakes can affect the transmission quality and reliability of the acoustic signal, causing significant attenuation of the sound waves and leading to false releases or command failures. Another approach involves placing the acoustic release device inside the seabed base. Depending on the size of the seabed base, the size of the buoy will increase accordingly. In this case, the buoy is more susceptible to damage from typhoons and collisions with passing vessels. Excessive buoy buoy buoy buoy buoy buoy buoyancy may also cause the rope to be unable to withstand the tension at both ends. Depending on the environment of the test area, the rope may be several kilometers long, introducing significant uncertainties.

[0020] To address the aforementioned problems, embodiments of this application provide a seabed-based release device based on intermittent threads, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes: a first seabed base 1 and a second seabed base 2, which are detachably connected by a connecting component; the connecting component includes: The partitioned threaded body 10 is rotatably connected to the first seabed base 1. The partitioned threaded body 10 includes a body and two sets of threaded fan bodies 11 formed on the body. The two sets of threaded fan bodies 11 are spaced apart on the outer periphery of the body and are arranged opposite to each other in the radial direction of the body. Each set of threaded fan bodies 11 includes at least three fan blades 12. The at least three fan blades 12 are spaced apart along the axial direction of the body. Each fan blade 12 includes an adjacent assembly area 121 and a guide area 122. Along the direction from the assembly area 121 to the guide area 122, the guide area 122 is constricted. A connecting compartment 20 is fixedly connected to the second seabed base 2. The connecting compartment 20 defines an assembly cavity 21. The inner wall of the assembly cavity 21 is provided with two sets of threaded grooves 22. The two sets of threaded grooves 22 are spaced apart on the inner wall of the assembly cavity 21 and are arranged opposite to each other in the radial direction of the assembly cavity 21. When the partition threaded body 10 is located in the assembly cavity 21, the partition threaded body 10 is rotated by a predetermined angle along the first direction, and the two sets of threaded fan bodies 11 and the two sets of threaded grooves 22 are correspondingly limited and engaged to connect the first seabed base 1 and the second seabed base 2. When the partition threaded body 10 is rotated by a predetermined angle along the second direction, the two sets of threaded fan bodies 11 and the two sets of threaded grooves 22 are separated to separate the first seabed base 1 and the second seabed base 2. The first direction and the second direction are opposite.

[0021] It should be noted that the first seabed base 1 and the second seabed base 2 are detachably connected, allowing for reliable separation of the two bases during the release process. The first seabed base 1 rises for recovery, while the second seabed base 2 sinks. The first and second seabed bases, serving as the core observation platform of the entire ocean observation system, are typically pressure-resistant sealed chambers. Each base houses various scientific instruments (such as hydrophones, CTD (Conductivity, Temperature, Depth) meters, ADCP (Advanced Dip-Cryopreservation) current meters, seismometers, water quality sensors, as well as power batteries and data acquisition controllers. The first and second seabed bases remain submerged on the seabed for continuous data collection and recording for months or even a year. The data is stored on a hard drive inside the second seabed base 2, facilitating recovery after separation and re-surfacing to obtain the collected oceanographic data.

[0022] The first seabed base 1 serves as the command center and life support system for the entire marine observation system, responsible for data monitoring, positioning and communication, safety assurance, and buoyancy support. The first seabed base 1 houses an integrated instrument compartment, positioning system, communication system, safety system, and floating structures. The integrated instrument compartment, acting as the central control room and assembly area of ​​the first seabed base 1, integrates previously dispersed key electronic equipment such as communication and positioning systems into one or more pressure-resistant sealed compartments, providing physical protection, pressure isolation, and structural support. The positioning system can be a typical acoustic release device / positioning beacon, used to receive instructions from the ship and establish relative positioning with the mother ship via acoustic signals before surfacing; alternatively, it can be a GPS / BeiDou antenna, operating after surfacing to immediately obtain its precise latitude and longitude coordinates; or it can be an Argos / Iridium satellite beacon, transmitting GPS coordinates to a remote control center via satellite link. The communication system is responsible for communication between the entire marine monitoring system and the outside world. For example, underwater acoustic communication is used during the underwater phase to send low-speed commands (such as preparing to release) and status data to the research vessel; during the surface phase, it switches to radio / satellite communication for high-speed transmission of critical data and positioning information; the safety system ensures the survival and recovery of equipment and data in extreme situations; for example, the emergency release device automatically triggers the abandonment of the weight and buoyancy when the main release device fails, based on preset conditions (such as reaching a predetermined time, power running out, or abnormal tilting detected); the float provides net positive buoyancy during the recovery phase, is made of high-strength lightweight materials (such as glass microsphere composite materials), can be filled with foam, and is painted in a conspicuous color (international orange) and equipped with anti-collision strips to ensure stability during the surfacing process and easy detection on the sea surface.

[0023] The second seabed base 2 is maintained underwater for extended periods, responsible for environmental sensing, mission execution, and internal operations. The rope compartment stores and systematically releases connecting cables. One end of the cable is fixed to the instrument compartment, and the other end connects to a release device and a gravity block. When the release device unlocks, the buoy rises, and the cable is pulled out of the compartment in an orderly manner, avoiding tangling, buffering the initial impact of ascent, and protecting the instrument compartment. Various measuring equipment includes, but is not limited to, CTD (Conductivity, Temperature, Depth), ADCP (Acoustic Doppler Current Profiler), turbidity meter, wave meter, broadband seafloor seismograph (OBS), seafloor boundary layer measuring instrument, nutrient analyzer, dissolved oxygen sensor, methane sensor, and underwater camera system. Typically, some of these sensors are directly integrated into the frame of the second seabed base 2. On the frame, some extend from the second seabed base 2 via short cables to avoid interference with the measurement. The energy compartment provides long-term, stable, and reliable power to all electronic devices and sensors, such as high-capacity lithium battery packs (e.g., lithium thionyl chloride batteries), which have high energy density and extremely low self-discharge rate, making them suitable for long-term operation. The central control unit (data acquisition and control system) is the local brain and dispatch center of the entire seabed base. It starts / stops each sensor according to a preset program and controls the sampling frequency. It collects the raw data from all sensors, performs format conversion, preliminary verification, and quality control, and efficiently stores the processed data in shockproof and pressure-resistant solid-state drives.

[0024] During actual deployment, the first seabed base 1 and the second seabed base 2 sink to the seabed as a single unit. During monitoring, the central control unit of the second seabed base 2 directs the measurement equipment to collect data, the energy compartment provides power, and all data is stored in the lower section. The communication system of the first seabed base 1 is in a dormant listening state, and the safety system silently monitors the time and system status. During recovery, the mother ship sends a "release" command through the acoustic communication system of the first seabed base 1. The command is transmitted to the release mechanism in the lower section (in conjunction with the rope chute), unlocking and jettisoning the gravity block. The float of the first seabed base 1 provides the main buoyancy, towing the lower main body connected by cables to the surface. After surfacing, the upper GPS and satellite communication systems immediately activate, reporting the location and completing the final recovery.

[0025] It is understandable that the intermittent threaded body 10 refers to a threaded body where the threads are not continuous but spaced out (i.e., some areas have threads while others do not). Using the intermittent threaded body 10 significantly simplifies the opening and closing action of the threaded body and improves operational convenience. The intermittent threaded body 10 includes a main body and threaded fan-shaped sections 11 formed on the outer periphery of the main body. The main body, as the core structure of the entire intermittent threaded body 10, is primarily used to form the threaded fan-shaped sections 11, which cooperate with the connecting compartment 20 to achieve a separable or detachable connection between the first seabed base 1 and the second seabed base 2. The two sets of threaded fan-shaped sections 11 are spaced apart on the outer periphery of the main body and are arranged radially opposite each other. This facilitates the limiting fit between the intermittent threaded body 10 and the connecting compartment 20, and also facilitates separation, reducing separation resistance. Each set of threaded fan body 11 may include three or more fan blades 12, which are spaced apart in the axial direction of the body. By setting multiple fan blades 12, it is beneficial to enhance the overall bearing capacity of the partitioned threaded body 10, ensuring that it can stably bear the weight of the seabed base while also ensuring a stable connection with the connecting compartment 20, thereby improving the connection stability of the first seabed base 1 and the second seabed base 2.

[0026] The first seabed base 1 and the partition threaded body 10 are rotatably connected, mainly for the partition threaded body 10 to rotate and connect to the compartment 20 for disengagement. The first seabed base 1 and the partition threaded body 10 can be connected by any rotatable connection method. For example, the first seabed base 1 is provided with a bearing seat, and a rolling bearing is installed inside the bearing seat. One end of the partition threaded body 10 is machined into a stepped shaft and inserted into the bearing's inner hole. A shoulder is designed on the shaft for axial positioning. The other end of the shaft is machined with an annular groove and a flexible retaining ring is installed. An end cap can be added to the end of the bearing seat to further restrict axial movement. Another example is that the first seabed base 1 and the partition threaded body 10 each have flanges and are connected by an annular raceway. Balls or rollers are arranged in the raceway. The flanges are sealed with a sealing end cap, and the axial clearance is controlled by bolt pre-tightening to ensure smooth rotation and prevent separation.

[0027] Each fan blade 12 includes an assembly area 121 and a guide area 122. The assembly area 121 is mainly used to cooperate with the connecting compartment 20 to fix and separate the partition threaded body 10 and the connecting compartment 20. The guide area 122 is constricted, so that each fan blade 12 has a structure that is narrower at one end and wider at the other end, which can provide guidance for the assembly and separation of the partition threaded body 10 and reduce separation resistance.

[0028] It is also understandable that the connecting chamber 20 is fixedly connected to the second seabed base 2, and the first seabed base 1 and the second seabed base 2 are detachably connected through the cooperation of the connecting chamber 20 and the partition threaded body 10. The assembly cavity 21 of the connecting chamber 20 is used to connect with the partition threaded body 10. The assembly cavity 21 has two sets of threaded grooves 22 corresponding to the two sets of threaded fan bodies 11. The inner wall of the assembly cavity 21, except for the threaded grooves 22, is left blank, which facilitates the assembly and disassembly of the threaded fan bodies 11 and the threaded grooves 22. Specifically, in actual use, rotating the partition threaded body 10 by a predetermined angle along the first direction causes the two sets of threaded fan bodies 11 to be correspondingly and limitedly engaged with the two sets of threaded grooves 22, thereby connecting the first seabed base 1 and the second seabed base 2; rotating the partition threaded body 10 by a predetermined angle along the second direction causes the two sets of threaded fan bodies 11 to separate from the two sets of threaded grooves 22, thereby separating the first seabed base 1 and the second seabed base 2. The predetermined angle can be determined based on the distance between the two threaded fan bodies 11, for example, but not limited to, 90°.

[0029] In summary, the seabed base release device based on intermittent threads in the embodiments of this application solves the problem in related technologies where acoustic release is a soft connection, which is easily affected by the underwater terrain and thus cannot reliably release the seabed base for recovery. In the embodiments of this application, the first seabed base 1 and the second seabed base 2 are detachably connected by a connecting component, which facilitates the recovery of the first seabed base 1. Furthermore, the connecting component includes a partitioned threaded body 10 and a connecting chamber 20. When the partitioned threaded body 10 is rotated in the first direction, the threaded fan bodies 11 spaced apart on the partitioned threaded body 10 and the threaded grooves 22 on the inner wall of the assembly cavity 21 of the connecting chamber 20 are in a limiting fit. This fit structure has good stability and reduces the influence of complex underwater terrain. When the partitioned threaded body 10 is rotated in the opposite direction, the threaded fan bodies 11 and the threaded grooves 22 separate, which can reliably separate the first seabed base 1 and the second seabed base 2. The separation reliability is high, the operation is simple, and the safety is good.

[0030] In some embodiments, the connecting assembly further includes at least three elastic elements 30, which are evenly distributed between the first seabed base 1 and the second seabed base 2, and one end of the elastic deformation direction of each elastic element 30 is connected to the first seabed base 1 and the other end is connected to the second seabed base 2.

[0031] The elastic element 30 may be, but is not limited to, a rigid spring. There may be three or more elastic elements 30.

[0032] In this embodiment, at least three elastic elements 30 are evenly spaced between the first seabed base 1 and the second seabed base 2. This helps to provide uniform buffering force at the moment of separation and release of the partition threaded body 10 and the connecting compartment 20, ensuring that the partition threaded body 10 and the connecting compartment 20 can be neatly and smoothly separated, avoiding structural jamming or damage.

[0033] In a preferred embodiment, four springs are arranged at equal intervals along the circular cross-section of the first seabed base 1 and the second seabed base 2.

[0034] In some embodiments, the side portion of each fan blade 12 away from the body is tilted toward the body to form an inclined surface, the inclined surface is configured as a guide area 122, and the tilt angle of the inclined surface is 60°-89°.

[0035] The inclination angle of the inclined surface can be, but is not limited to, 60°, 65°, 70°, 75°, 80° or 89°.

[0036] In this embodiment, the inclined surface on the fan blade 12 is configured as a guide area 122, which has a simple structure, is easy to process, and the range of the inclined angle of the inclined surface can provide guidance for the threaded body to come out and separate, reducing the separation resistance.

[0037] In some embodiments, the central angle of each set of threaded sector 11 is greater than or equal to 80° and less than 90°.

[0038] The central angle of the threaded fan body 11 in this embodiment helps to ensure reliable assembly of the threaded fan body 11 and the connecting compartment 20, and also facilitates reliable separation.

[0039] In some embodiments, the area on the outer periphery of the body located between the two sets of threaded fan bodies 11 is a smooth area, and the central angle of the smooth area is greater than or equal to 90° and less than or equal to 100°.

[0040] It is understandable that the smooth area is the area on the body where no threaded sector 11 is provided, and the threaded sector 11 and the smooth area together occupy the entire outer peripheral wall of the body.

[0041] In this embodiment, the central angle range of the smooth surface area is advantageous because when separating the partition threaded body 10, only about 90° rotation is needed to separate the partition threaded body 10 and the connecting compartment 20.

[0042] As an implementation method, the connecting assembly also includes a limiting baffle 23, which is disposed on the inner wall of the assembly cavity 21. When the partition threaded body 10 is located in the assembly cavity 21, after the partition threaded body 10 is rotated by a predetermined angle along the second direction, the two sets of threaded fan bodies 11 and the two sets of threaded grooves 22 are separated accordingly, and the limiting baffle 23 stops and cooperates with at least one of the threaded fan bodies 11.

[0043] Understandably, the limiting baffle 23 is located in the smooth area of ​​the assembly cavity 21. While ensuring the rotation of the partition threaded body 10 is not affected, it also ensures that after the partition threaded body 10 rotates a predetermined angle along the second direction, excessive rotation will prevent the partition threaded body 10 from reliably disengaging from the connecting compartment 20. After the partition threaded body 10 rotates a predetermined angle along the second direction, the limiting baffle 23 engages with one of the threaded fan bodies 11.

[0044] In this embodiment, the limiting baffle 23 helps to limit the rotation angle of the partition threaded body 10, preventing the partition threaded body 10 from being re-threaded due to excessive rotation, thus preventing it from disengaging normally and ensuring the reliability of the separation process.

[0045] As a feasible approach, such as Figure 5 and Figure 6 As shown, the connecting assembly also includes a limiting protrusion 40 and a limiting groove 50. One of the limiting protrusion 40 and the limiting groove 50 is disposed on the first seabed base 1, and the other is disposed on the second seabed base 2. The limiting protrusion 40 and the limiting groove 50 are engaged in a limiting fit.

[0046] It is understandable that the limiting protrusion 40 and the limiting groove 50 are respectively set on the opposite surfaces of the first seabed base 1 and the second seabed base 2. Through the limiting cooperation of the limiting protrusion 40 and the limiting groove 50, the first seabed base 1 and the second seabed base 2 are mutually limited. This is beneficial to fixing the position of the first seabed base 1 relative to the second seabed base 2, ensuring that the partition threaded body 10 can rotate stably, and avoiding the failure of the partition threaded body 10 and the connecting compartment 20 to separate due to the free rotation of the first seabed base 1.

[0047] Among them, there can be at least two limiting protrusions 40 and limiting grooves 50, which helps to ensure the stable positioning of the first seabed base 1 and the second seabed base 2, and avoids the shaking between the first seabed base 1 and the second seabed base 2 caused by underwater environmental disturbances, which would prevent the partition threaded body 10 and the connecting compartment 20 from being reliably separated.

[0048] The limiting protrusion 40 and limiting groove 50 in this embodiment are conducive to the stable fixation of the first seabed base 1 relative to the second seabed base 2, so that the partition threaded body 10 can rotate stably, avoiding the partition threaded body 10 and the first seabed base 1 from spinning freely as a whole, thereby ensuring that the partition threaded body 10 and the connecting compartment 20 can be reliably separated.

[0049] As an implementation method, the connecting compartment 20 includes a cover 24, and the connecting assembly also includes a seal. The seal is disposed on the cover 24. After the partition threaded body 10 is engaged with the threaded groove 22, the cover 24 covers the opening of the connecting compartment 20, and the seal is in tight contact with the end face of the partition threaded body 10.

[0050] In this embodiment, the sealing element can be, but is not limited to, various sealing rings. The sealing element is mainly used to seal the gap between the partition threaded body 10 and the connecting chamber 20. When the threaded groove 22 in the assembly cavity 21 of the partition threaded body 10 and the connecting chamber 20 are engaged, the sealing gasket on the hatch cover 24 will automatically fill the gap between the partition threaded body 10 and the end of the connecting chamber 20, so that the entire connecting chamber 20 forms a completely sealed environment that isolates seawater, preventing seawater from seeping in and damaging the internal components. It is suitable for operation in complex underwater environments.

[0051] As an alternative, the seabed-based release device also includes a rotary hydraulic cylinder 60, which is drivenly connected to the partitioned threaded body 10 and is used to drive the partitioned threaded body 10 to rotate.

[0052] Among them, the rotary hydraulic cylinder 60 is a hydraulic actuator that efficiently converts hydraulic energy into rotational mechanical energy. Its core function is to output controllable torque and fixed-angle / continuous rotational motion. It has significant advantages such as high torque density, fast response speed, and strong anti-pollution capability. The working principle of the rotary hydraulic cylinder 60 is Pascal's law (in a closed fluid, a pressure change can be transmitted equally to all points). It drives the internal moving parts to rotate through the pressure difference of hydraulic oil. The specific process can be divided into three steps: "power input - motion conversion - torque output". (1) Power input: High-pressure oil in the hydraulic system enters a specific chamber of the cylinder through the oil inlet, and low-pressure oil is discharged from the oil return port, forming a pressure difference between the chambers; (2) Motion conversion: The pressure difference acts on the internal "rotor-stator (sealed cover 24)" structure, driving the rotor to rotate around the central axis; (3) Torque output: The rotor is rigidly connected to the output shaft. The rotational motion and torque are transmitted to the load through the output shaft to realize the fixed angle rotation or continuous rotation of the load (thread body).

[0053] In this embodiment, a rotary hydraulic cylinder 60 is used to perform the release action, which efficiently converts hydraulic energy into rotational mechanical energy. High-pressure oil enters a specific chamber of the cylinder through the oil inlet, and low-pressure oil is discharged from the oil return port, forming a pressure difference between the chambers, thereby realizing the predetermined angle rotation of the isolated threaded body 10.

[0054] In summary, the seabed-based release device based on intermittent threads in this application has a multi-layered, wide threaded fan body 11 with a contact surface suitable for load-bearing. Rotating a specific angle allows the intermittent threaded body 10 and the connecting chamber 20 to completely separate. The connecting chamber 20 is sealed and protected. After the seal on the hatch cover 24 is locked in the threaded groove 22 in the assembly cavity 21, the seal can automatically fill the gap between the intermittent threaded body 10 and the connecting chamber 20, forming a completely sealed environment that isolates seawater from the entire connecting chamber 20, preventing seawater from seeping in and damaging internal components. This device is suitable for operation in complex underwater environments. The elastic element 30, the limiting baffle 23, the limiting protrusion 40, and the limiting groove 50 ensure accurate execution of the release action, allowing the intermittent threaded body 10 and the connecting chamber 20 to separate neatly and smoothly, avoiding structural jamming or damage.

[0055] The seabed-based release device based on intermittent threads of the present invention will be described below with a specific embodiment.

[0056] like Figure 1-6 As shown, the seabed base release device based on intermittent threads includes a first seabed base 1 and a second seabed base 2, which are detachably connected by a connecting component. The connecting assembly includes a partitioned threaded body 10, a bearing seat is provided on the first seabed base 1, a rolling bearing is installed inside the bearing seat, one end of the partitioned threaded body 10 is machined into a stepped shaft and inserted into the inner hole of the rolling bearing, and a shoulder is designed on the shaft for axial positioning; the other end of the shaft is machined into an annular groove and an elastic retaining ring is installed, and an end cap is added to the end of the bearing seat to further restrict axial movement, thereby realizing a rotatable connection between the first seabed base 1 and the partitioned threaded body 10; The partitioned threaded body 10 includes a body and two sets of threaded fan bodies 11 formed on the body. The two sets of threaded fan bodies 11 are spaced apart on the outer periphery of the body and are arranged opposite each other in the radial direction of the body. Each set of threaded fan bodies 11 includes at least three fan blades 12, which are spaced apart along the axial direction of the body. Each fan blade 12 includes an adjacent assembly area 121 and a guide area 122. The side portion of each fan blade 12 away from the body is inclined towards the body to form an inclined surface. The surface is configured as a guide area 122, the inclination angle of the inclined surface is slightly less than 90°, the central angle of each set of threaded fan bodies 11 is slightly less than 90°, the area on the outer periphery of the body between the two sets of threaded fan bodies 11 is a smooth area, the central angle of the smooth area is equal to 90°, ensuring that the partition threaded body 10 only needs to rotate 90° to separate the partition threaded body 10 from the connecting compartment 20; the partition threaded body 10 is provided with a rotary hydraulic cylinder 60, which is used to drive the partition threaded body 10 to rotate; A connecting compartment 20 is fixedly connected to the second seabed base 2. The connecting compartment 20 internally defines an assembly cavity 21. Two sets of threaded grooves 22 are provided on the inner wall of the assembly cavity 21, spaced apart and arranged radially opposite to each other. When the partition threaded body 10 is located within the assembly cavity 21, rotating the partition threaded body 1090° along a first direction causes the two sets of threaded fan bodies 11 to correspondingly engage with the two sets of threaded grooves 22, thereby connecting the first seabed base 1 and the second seabed base 2. Rotating the partition threaded body 1090° along a second direction causes the two sets of threaded fan bodies 11 to separate from the two sets of threaded grooves 22, thus separating the first seabed base 1 and the second seabed base 2. The first and second directions are opposite. Four springs are evenly distributed between the first seabed base 1 and the second seabed base 2. One end of the spring is connected to the first seabed base 1 in the direction of elastic deformation, and the other end is connected to the second seabed base 2. Four limiting bosses are provided on the surface of the first seabed base 1 facing the second seabed base 2, and four limiting grooves 50 are provided on the surface of the second seabed base 2 facing the first seabed base 1. The limiting bosses and limiting grooves 50 limit each other to ensure a stable connection between the first seabed base 1 and the second seabed base 2 and prevent the partitioned threaded body 10 from spinning freely.

[0057] In actual operation, when the deployment operation progresses to the "release trigger" phase, the overall process is as follows: (1) Signal triggering: The surface control terminal sends a release signal to the underwater rotary hydraulic cylinder 60 switch, and the rotary hydraulic cylinder 60 switch starts to operate after receiving the signal; (2) Precise rotation: The rotating hydraulic cylinder 60 drives the threaded body to rotate 90 degrees. During this process, the limiting baffle 23 in the connecting compartment 20 will limit the rotation angle of the threaded body to prevent the threaded body from rotating more than 90 degrees and relocking. At the same time, the limiting protrusion 40 and the limiting groove 50 will limit the rotation trajectory of the hatch cover 24 and the first seabed base 1 connected to it, ensuring that the threaded body itself rotates stably, rather than the first seabed base 1 spinning freely, thus avoiding unlocking failure due to spinning freely. (3) Structural separation: After the partition threaded body 10 rotates 90 degrees, it completely disengages from the threaded groove 22 of the connecting compartment 20; since the bottom of the connecting compartment 20 is fixedly connected to the second seabed base 2 and the partition threaded body 10 is fixedly connected to the second seabed base 2, after separation, the connecting compartment 20 will sink along with the second seabed base 2, while the partition threaded body 10 will float up with the first seabed base 1 under the action of buoyancy, thus achieving precise separation between the first seabed base 1 and the second seabed base 2; (4) In this embodiment, the unlocking and separation and locking actions rotate in opposite directions. By using clear reverse rotation logic, confusion of direction during operation is avoided and the accuracy of operation is improved.

[0058] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the panel or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0059] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A seabed-based release device based on intermittent threads, characterized in that, include: A first seabed base and a second seabed base, wherein the first seabed base and the second seabed base are detachably connected by a connecting component; the connecting component includes: A partitioned threaded body is rotatably connected to the first seabed base. The partitioned threaded body includes a body and two sets of threaded fan bodies formed on the body. The two sets of threaded fan bodies are spaced apart on the outer periphery of the body and are arranged opposite to each other in the radial direction of the body. Each set of threaded fan bodies includes at least three fan blades. The at least three fan blades are spaced apart along the axial direction of the body. Each fan blade includes an adjacent assembly area and a guide area. The guide area is constricted along the direction from the assembly area to the guide area. A connecting compartment is fixedly connected to the second seabed base. The connecting compartment includes an assembly cavity. Two sets of threaded grooves are provided on the inner wall of the assembly cavity, spaced apart and radially opposite to each other. When the partition threaded body is located within the assembly cavity, rotating it by a predetermined angle along a first direction causes the two sets of threaded fan bodies to correspondingly engage with the two sets of threaded grooves, thereby connecting the first and second seabed bases. Rotating the partition threaded body by a predetermined angle along a second direction causes the two sets of threaded fan bodies to separate from the two sets of threaded grooves, thus separating the first and second seabed bases. The first and second directions are opposite.

2. The seabed-based release device based on intermittent threads according to claim 1, characterized in that, The connecting assembly further includes at least three elastic elements, which are evenly distributed between the first seabed base and the second seabed base. Each elastic element has one end connected to the first seabed base and the other end connected to the second seabed base in the direction of elastic deformation.

3. The seabed-based release device based on intermittent threads according to claim 1, characterized in that, Each fan blade has a side portion away from the main body that is tilted towards the main body to form an inclined surface, which is configured as the guide area, and the tilt angle of the inclined surface is 60°-89°.

4. The seabed-based release device based on intermittent threads according to claim 1, characterized in that, The central angle of each set of threaded sector bodies is greater than or equal to 80° and less than 90°.

5. The seabed-based release device based on intermittent threads according to claim 1, characterized in that, The area on the outer periphery of the main body located between the two sets of threaded fan bodies is a smooth area, and the central angle of the smooth area is greater than or equal to 90° and less than or equal to 100°.

6. The seabed-based release device based on intermittent threads according to any one of claims 1-5, characterized in that, The connecting assembly further includes a limiting baffle, which is disposed on the inner wall of the assembly cavity. When the partition threaded body is located in the assembly cavity and rotates the partition threaded body by a predetermined angle along the second direction, the two sets of threaded fan bodies and the two sets of threaded grooves are separated accordingly. The limiting baffle cooperates with at least one of the threaded fan bodies to stop.

7. The seabed-based release device based on intermittent threads according to any one of claims 1-5, characterized in that, The connecting component further includes a limiting protrusion and a limiting groove, one of which is disposed on the first seabed base and the other is disposed on the second seabed base, and the limiting protrusion and the limiting groove are engaged in a limiting fit.

8. The seabed-based release device based on intermittent threads according to any one of claims 1-5, characterized in that, The connecting compartment includes a cover, and the connecting assembly also includes a seal. The seal is disposed on the cover. After the partition threaded body is engaged with the threaded groove, the cover covers the opening of the connecting compartment, and the seal is in tight contact with the end face of the partition threaded body.

9. The seabed-based release device based on intermittent threads according to any one of claims 1-5, characterized in that, The seabed-based release device also includes a rotary hydraulic cylinder, which is drivenly connected to the partitioned threaded body and is used to drive the partitioned threaded body to rotate.

10. The seabed-based release device based on intermittent threads according to any one of claims 1-5, characterized in that, The first seabed base is equipped with an integrated instrument cabin, positioning components, communication components, safety components and a floating body, while the second seabed base is equipped with a rope cabin, measuring equipment, an energy cabin and a central control unit.

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