Marine flexible axial extruded corrosion resistant joint

Abstract

The application provides a marine flexible axial extrusion corrosion-resistant joint, and belongs to the technical field of marine joints. The marine flexible axial extrusion corrosion-resistant joint comprises assembly pieces one, a pair of rubber hoses arranged between the assembly pieces one, outer edges extending outwardly arranged on both sides of the rubber hoses, and opposite assembly pieces two arranged on one side of each of the assembly pieces one, and conveying metal pipes fixedly connected to one side of each of the opposite assembly pieces two away from the assembly pieces one. The application solves the problem that the existing marine flexible joint is mainly connected in a static state by means of the pre-tightening force of a lead screw during assembly, the leakage prevention capability is affected by assembly precision, the wear of a gasket and the like cannot be automatically compensated and made up after long-term use, and the assembly orientation of the gasket and the like must be paid attention to during arrangement to prevent deviation.

Description

Technical Field

[0001] This invention belongs to the field of marine joint technology, specifically relating to a marine flexible axial extrusion corrosion-resistant joint. Background Technology

[0002] Marine flexible corrosion-resistant joints are core components used for pipeline connection in marine piping systems. They mainly undertake the functions of media transportation and pipeline deformation compensation. They typically use a flexible rubber structure to adapt to the vibration, axial movement and sway generated by the pipeline during ship navigation. The cooperating disc and screw realize the pipeline fastening connection. They must have good corrosion resistance and sealing reliability to ensure the stable operation of the ship's media transportation system.

[0003] Existing marine flexible joints mostly rely on the preload of the screw during assembly to achieve static connection. The leak-proof capability is affected by the assembly accuracy. After long-term use, when the gaskets and other components wear out, they cannot automatically compensate for the wear. Furthermore, when installing the gaskets and other components, attention must be paid to the assembly position to prevent them from shifting, falling off, or adhering to impurities, which would affect the leak-proof effect. Therefore, a marine flexible axial extrusion corrosion-resistant joint is proposed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to prevent obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] Given the following technical problems in the existing technology: existing marine flexible joints mostly rely on the preload of the screw during assembly to achieve static connection, the anti-leakage capability is affected by the assembly accuracy, and after long-term use, the wear of washers and other components cannot be automatically compensated, and the installation of washers and other components requires attention to the assembly position to prevent misalignment.

[0006] To solve the above technical problems, the present invention provides the following technical solution: a marine flexible axial extrusion corrosion-resistant joint, comprising an assembly piece 1, a rubber hose installed between a pair of the assembly pieces, the rubber hose having outwardly extending outer edges on both sides, a mating assembly piece 2 installed on each of the opposite sides of the assembly piece 1, a conveying metal pipe fixedly connected to the side of the mating assembly piece 2 away from the assembly piece 1, and several assembly holes pre-reserved on both the mating assembly piece 2 and the assembly piece 1, a lead screw passing through the assembly holes, a twist head fixedly connected to one side of the lead screw, and a lead nut threaded to the other side of the lead screw; Two sets of top-contact anti-leakage units are reserved on one side of the docking assembly piece 2 that is close to the assembly piece 1. The top-contact anti-leakage units are used to contact the wall of the assembly piece 1 to ensure that the connection between the assembly piece 1 and the docking assembly piece 2 is tight and leak-proof. Each of the aforementioned top contact anti-leakage units is equipped with an auxiliary driven unit. The auxiliary driven unit is used to provide a continuous external force to the top contact anti-leakage unit to ensure the tightness of the top contact. Each top contact anti-leakage unit is equipped with a set of auxiliary driven units. The second docking assembly piece is equipped with several pressure-triggered units. The pressure-triggered units are connected to the top contact anti-leakage unit and will activate to run the auxiliary driven unit when the medium is introduced into the rubber hose and the conveying metal pipe.

[0007] Furthermore, an assembly groove adapted to the outer edge is reserved on the inner wall of the side opposite to the first assembly piece 2, and the outer edge will be located in the assembly groove.

[0008] Furthermore, the top contact anti-leakage unit includes a movable chamber reserved on the side of the docking assembly piece two near the assembly piece one, and an air chamber installed inside the docking assembly piece two is connected to the inner side of the movable chamber, and a circular seal is slidably connected inside the movable chamber.

[0009] Furthermore, the cross-section of the activity chamber is "T" shaped, the circular seal is adapted to the activity chamber and is also "T" shaped in cross-section, the thickness of the two extended sides of the circular seal is less than the thickness of the two extended sides of the activity chamber, and a circular groove is reserved on the inner side of the circular seal.

[0010] Furthermore, the top contact leak prevention unit is installed in two sets, and the active chamber, circular seal and air chamber in the two sets of top contact leak prevention units are all circular. The circumference of the active chamber, circular seal and air chamber on the edge is greater than that of the active chamber, circular seal and air chamber on the inner side.

[0011] Furthermore, the auxiliary driven unit includes several constraint rods, which are arranged in a circular, equally spaced pattern within the air chamber. A driven circular bar is slidably connected to one side of each constraint rod near the circular seal. A transmission circular bar is also slidably connected to each constraint rod. A baffle is installed on each constraint rod. Several springs are installed between the driven circular bar and the transmission circular bar, covering the corresponding constraint rod. Several threaded interfaces are reserved on the side of the air chamber away from the circular seal, and the orientation of the threaded interfaces is adapted to the corresponding constraint rod.

[0012] Furthermore, the threaded interface is threaded to the inner side of the constraint rod, and the constraint rod is fixedly connected to the mating assembly piece via the threaded interface. The constraint rod penetrates the driven round bar and the transmission round bar.

[0013] Furthermore, the driven circular bar is adapted to the circular groove of the circular seal, and the transmission circular bar is adapted to the size of the air chamber.

[0014] Furthermore, the pressure-triggered units are divided into two groups and installed in equal intervals. Each group of pressure-triggered units is connected to a corresponding top contact anti-leakage unit. The distance between the two sides of the pressure-triggered unit connected to the inner top contact anti-leakage unit is smaller than the distance between the two sides of the pressure-triggered unit connected to the edge top contact anti-leakage unit. The pressure-triggered unit includes an assembly cavity, which is pre-installed on the second docking assembly piece. A base platform is threaded to one side of the assembly cavity near the inner wall of the second docking assembly piece. A fixing rod is mounted on one side of the base platform, and an upper stop platform is fixed to the other side of the fixing rod. A sliding platform is slidably connected to the fixing rod, and a spring is installed between the sliding platform and the upper stop platform. Air outlets are reserved at equal intervals on the upper stop platform, and leaks are reserved at equal intervals on the base platform. Several equally spaced blocking strips are fixed to the side of the sliding platform near the base platform, and the blocking strips are adapted to the leaks.

[0015] Furthermore, the assembly cavity has pre-reserved threads at the opening of the inner wall of the mating assembly piece. The assembly cavity near the rubber hose is connected to the air chamber with a smaller circumference, while the assembly cavity away from the rubber hose is connected to the air chamber with a larger circumference.

[0016] The beneficial effects of this invention are as follows: 1. This invention features a dual-layer top-contact leak-proof unit to form redundant leak-proof protection. It relies on a self-triggered pressurization mechanism based on medium pressure to achieve compensatory sealing. The higher the medium pressure, the stronger the tightening force of the circular seal. Combined with the initial static leak-proof effect of the outer edge and the mating assembly plate's two assembly grooves, it can progressively block the medium leakage path, significantly enhancing the joint's leak-proof capability and pressure resistance, and ensuring the continuity of corrosion-resistant leak-proof performance.

[0017] 2. This invention provides flexible compensation via rubber hoses, which can adapt to pipeline vibration, movement and sway under marine working conditions. The core components are all connected by threaded joints and can be assembled separately. The constraint rod and threaded interface, the base platform and the assembly cavity can be separated, which is conducive to the inspection and replacement of parts. The stable sliding restriction structure can prevent the movement from deviating and jamming. While ensuring stable operation, it reduces maintenance costs and allows the joint to operate for a long time.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 Embodiments of the present invention Figure 1 Schematic diagram of cross-section structure; Figure 3 Embodiments of the present invention Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 Embodiments of the present invention Figure 2 Schematic diagram of the structure at point B; Figure 5 This is a schematic diagram of the structure of the removed assembly piece 1 and the external assembly piece 1 according to an embodiment of the present invention; Figure 6 Embodiments of the present invention Figure 5 Another perspective structural diagram; Figure 7 This is a schematic diagram of the sliding stage structure according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the plug structure according to an embodiment of the present invention; Reference numerals: 100, Assembly piece one; 200, Rubber hose; 201, Outer edge; 300, Butt joint assembly piece two; 301, Conveying metal pipe; 302, Twist head; 303, Threaded cap; 304, Lead screw; 401, Assembly cavity; 402, Base platform; 4021, Exit; 403, Connecting rod; 404, Sliding platform; 4041, Blocking strip; 405, Upper stop platform; 4051, Air outlet; 406, Spring one; 601, Moving chamber; 602, Circular seal; 603, Air chamber; 701, Constraint rod; 702, Baffle plate; 703, Threaded joint; 704, Transmission round bar; 705, Spring two; 706, Driven round bar. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0024] Reference Figures 1-8 This invention provides a marine flexible axial extrusion corrosion-resistant joint, including an assembly piece 100. A rubber hose 200 is installed between a pair of assembly pieces 100. The rubber hose 200 has outwardly extending outer edges 201 on both sides. A mating assembly piece 300 is installed on the opposite side of the assembly pieces 100. A conveying metal pipe 301 is fixedly connected to the side of the mating assembly piece 300 away from the assembly piece 100. Several assembly holes are reserved on both the mating assembly piece 300 and the assembly piece 100. A lead screw 304 is installed through the assembly holes. A twist head 302 is fixedly connected to one side of the lead screw 304, and a threaded nut 303 is threaded to the other side of the lead screw 304. Two sets of top-contact anti-leakage units are reserved on one side of the docking assembly piece 2 300 near the assembly piece 100. The top-contact anti-leakage units are used to make contact with the wall of the assembly piece 100 to ensure that the connection between the assembly piece 100 and the docking assembly piece 2 300 is tight and leak-proof. Each set of top contact anti-leakage units is equipped with an auxiliary driven unit. The auxiliary driven unit is used to provide a continuous external force to the top contact anti-leakage unit to ensure the tightness of the top contact. Each top contact anti-leakage unit is equipped with a set of auxiliary driven units. Several pressure-triggered units are installed on the docking assembly piece 2 300. The pressure-triggered units are connected to the top contact anti-leakage unit and will activate to run the auxiliary driven unit when the medium is introduced into the rubber hose 200 and the conveying metal pipe 301. During assembly, the rubber hose 200 is placed between a pair of assembly pieces 100, and the mating assembly piece 200 is pressed against the outer wall of the two assembly pieces 100. The screw 304 is inserted into the assembly hole of the mating assembly piece 200 and the assembly piece 100, and the screw cap 303 is tightened to achieve the clamping connection of the overall structure, completing the initial assembly of the joint. When the conveying medium is introduced into the conveying metal pipe 301 and the rubber hose 200, the pressure of the medium affects the pressure triggering unit. After the pressure triggering unit is activated, it drives the auxiliary driven unit to output a continuous pressing force, pushing the anti-leakage unit to tightly press against the wall of the assembly piece 100, enhancing the anti-leakage effect. At the same time, the rubber hose 200 can provide flexible deformation compensation to adapt to vibration, movement and sway under marine working conditions, ensuring the joint is corrosion-resistant and tightly connected.

[0025] On the inner wall of the mating assembly piece 2 300 opposite to the mating assembly piece 100, there is a reserved assembly groove that matches the outer edge 201. The outer edge 201 will be located in the assembly groove. During the assembly process, the outer edges 201 on both sides of the rubber hose 200 are embedded in the assembly groove on the inner wall of the mating assembly piece 2 300. On the one hand, this limits the rubber hose 200 and prevents it from moving or falling off during the flow of the medium. On the other hand, the interlocking structure of the outer edge 201 and the assembly groove forms the first leakage barrier, improving the initial static leakage prevention performance of the joint.

[0026] The top-contact anti-leakage unit includes a movable chamber 601 pre-installed on the side of the docking assembly piece 2 300 near the docking assembly piece 100. The inner side of the movable chamber 601 is connected to an air chamber 603 installed inside the docking assembly piece 2 300. A circular seal 602 is slidably connected in the movable chamber 601. When the medium in the air chamber 603 is compressed, the air pressure in the air chamber 603 increases, causing the circular seal 602 to slide and protrude along the movable chamber 601 toward the side of the docking assembly piece 100, so that the wall surface of the circular seal 602 is tightly pressed against the wall surface of the docking assembly piece 100, forming a dynamic anti-leakage action. The greater the air pressure, the greater the tightening force of the circular seal 602, realizing pressure self-compensation anti-leakage, effectively preventing the medium from leaking outward from the cooperation gap between the docking assembly piece 2 300 and the docking assembly piece 100.

[0027] The cross-section of the active chamber 601 is "T" shaped. The circular seal 602 is adapted to the active chamber 601 and is also "T" shaped in cross-section. The thickness of the two extended sides of the circular seal 602 is smaller than that of the two extended sides of the active chamber 601. A circular groove is reserved on the inner side of the circular seal 602. The T-shaped cross-section of the active chamber 601 and the circular seal 602 form a stepped limiting cooperation, which can limit the maximum extension of the circular seal 602 and prevent the circular seal 602 from sliding out of the active chamber 601. The smaller thickness of the two extended sides of the circular seal 602 allows for sufficient sliding space. The circular groove is used to receive the thrust component of the auxiliary driven unit, so that the thrust is evenly transmitted to the entire circular seal 602, preventing local force imbalance that could cause partial twisting or skewing.

[0028] Two sets of top-contact leak-proof units are installed, and the movable chamber 601, circular seal 602, and air chamber 603 in both sets of top-contact leak-proof units are all circular. The perimeter of the movable chamber 601, circular seal 602, and air chamber 603 on the edge is larger than that of the movable chamber 601, circular seal 602, and air chamber 603 on the inner side. The two sets of top-contact leak-proof units form a double-redundant leak-proof structure. The movable chamber 601, circular seal 602, and air chamber 603 on the edge prevent the medium from leaking outward, while the movable chamber 601, circular seal 602, and air chamber 603 on the inner side with a smaller perimeter forms a second layer of protection. The double-layer structure can reduce the risk of leakage step by step. Even if one layer wears and fails, the other layer can still maintain the leak-proof capability, increasing the pressure resistance level and long-term reliability of the joint.

[0029] The auxiliary driven unit includes several constraint rods 701, which are arranged in a circular, equally spaced pattern within the air chamber 603. A driven circular bar 706 is slidably connected to one side of each constraint rod 701 near the circular seal 602. A transmission circular bar 704 is also slidably connected to each constraint rod 701. A baffle 702 is installed on each constraint rod 701. Several springs 705, covering the corresponding constraint rod 701, are installed between the driven circular bar 706 and the transmission circular bar 704. Several threaded interfaces 703 are pre-installed on one side of the air chamber 603 away from the circular seal 602. The orientation of the rod is adapted to the corresponding constraint rod 701. The constraint rod 701 is fixed to the docking assembly piece 300 via the threaded interface 703, providing a smooth sliding restriction for the drive rod 704 and the driven rod 706, and facilitating separation. When the drive rod 704 moves under the influence of air pressure, the spring 705 will be compressed and tightened to cooperate with the driven rod 706. In this way, the drive rod 704 pulls the driven rod 706 to push the circular seal 602, providing an external force to the circular seal 602. This can compensate for the wear of the circular seal 602 after long-term use and ensure that the circular seal 602 always makes a tight contact.

[0030] The threaded interface 703 is threaded to the inner side of the constraint rod 701. The constraint rod 701 is fixed to the mating assembly piece 300 via the threaded interface 703. The constraint rod 701 penetrates the driven round bar 706 and the transmission round bar 704. The constraint rod 701 is connected to the threaded interface 703 by threading, which realizes detachable assembly and facilitates the inspection and replacement of parts. The constraint rod 701 also penetrates the driven round bar 706 and the transmission round bar 704, constraining their sliding trajectories, ensuring their smooth movement, preventing skewing and jamming, and ensuring that the top contact surface is subjected to balanced and consistent force.

[0031] The driven round bar 706 is adapted to the circular groove of the circular seal 602, and the transmission round bar 704 is adapted to the size of the air chamber 603. The driven round bar 706 is embedded in the circular groove of the circular seal 602 to form a fitting and positioning. The transmission round bar 704 is adapted to the air chamber 603, which can slide smoothly along the inner wall of the air chamber 603 and form a cooperative seal with the inner wall of the air chamber 603 to reduce the leakage of the medium in the air chamber 603, ensure the stable air pressure in the air chamber 603, and maintain the continuous output of thrust.

[0032] Several pressure-triggered units are installed in two groups, and each group of pressure-triggered units is installed at equal intervals. Each group of pressure-triggered units is connected to the corresponding top contact anti-leakage unit. The distance between the two sides of the pressure-triggered unit connected to the inner top contact anti-leakage unit is lower than the distance between the two sides of the pressure-triggered unit connected to the edge top contact anti-leakage unit. The pressure-triggered unit includes an assembly cavity 401, which is pre-installed on the mating assembly piece 300. A base platform 402 is threaded onto one side of the assembly cavity 401 near the inner wall of the mating assembly piece 300. A connecting rod 403 is mounted on one side of the base platform 402, and an upper stop platform 405 is fixed to the other side of the connecting rod 403. A sliding platform 404 is slidably connected to the connecting rod 403, and a spring 406 is installed between the sliding platform 404 and the upper stop platform 405. The upper stop platform 405 has air outlets 4051 reserved at equal intervals, and the base platform 402 has leaks 4021 reserved at equal intervals. Several equally spaced blocking strips 4041 are fixed to one side of the sliding platform 404 near the base platform 402. The blocking strips 4041 are compatible with the leaks 4021. Under normal conditions, spring 406 pushes the sliding platform 404 closer to the base platform 402, and the blocking strips 4041 embed into the leaks 4021 to block the passage. Air chamber 603... The connector is not electrically connected. When the conveying medium is introduced into the connector, the medium pressure will generate an external force on the wall of the sliding table 404, overcoming the force of the spring 406 to drive the sliding table 404 to slide towards the limiting table 405 along the connecting rod 403. The plug 4041 moves with the sliding table 404 and leaves the outlet 4021. The medium enters the assembly cavity 401 through the outlet 4021, providing the power for the movement of the sliding table 404. The sliding table 404 carries the medium in the assembly cavity 401. The air outlet 4051 of the upper stop platform 405 moves to the air chamber 603 of the corresponding top contact anti-leakage unit, realizing self-triggered pressurization under the medium. The two sets of triggering units with different distance spans are adapted to the assembly spacing of the inner and outer top contact anti-leakage units, ensuring that the double top contact anti-leakage units can trigger pressurization together. When the medium is no longer being transported, the spring 406 can assist the sliding platform 404 to return to the position of the base platform 402, so that the medium is completely drained.

[0033] The assembly cavity 401 has pre-drilled threads at the opening on the inner wall of the mating assembly piece 300. The assembly cavity 401 near the rubber hose 200 is connected to the air chamber 603 with a smaller circumference, while the assembly cavity 401 away from the rubber hose 200 is connected to the air chamber 603 with a larger circumference. The threads on the opening of the inner wall of the assembly cavity 401 are used for the threaded assembly of the base platform 402. The inner and outer assembly cavities 401 are each connected to the corresponding air chamber 603, so that both the inner and outer top contact anti-leakage units bear the pressure from the medium, realizing the synchronous pressurization action of the dual top contact anti-leakage units, and ensuring that the two circular seals 602 work together.

[0034] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development effort will be a routine task in design, manufacturing, and production without requiring extensive experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A marine flexible axial extrusion corrosion-resistant joint, comprising an assembly piece (100), characterized in that, A rubber hose (200) is installed between a pair of assembly pieces (100). The rubber hose (200) has outwardly extending outer edges (201) on both sides. A mating assembly piece (300) is installed on each of the opposite sides of the assembly pieces (100). A conveying metal pipe (301) is fixedly connected to the side of the mating assembly piece (300) away from the assembly piece (100). Several assembly holes are reserved on both the mating assembly piece (300) and the assembly piece (100). A lead screw (304) is installed through the assembly holes. A twist head (302) is fixedly connected to one side of the lead screw (304), and a threaded cap (303) is threaded to the other side of the lead screw (304). Two sets of top-contact anti-leakage units are reserved on one side of the docking assembly piece 2 (300) close to the assembly piece 1 (100). The top-contact anti-leakage units are used to make contact with the wall of the assembly piece 1 (100) to ensure that the connection between the assembly piece 1 (100) and the docking assembly piece 2 (300) is tight and leak-proof. Each of the aforementioned top contact anti-leakage units is equipped with an auxiliary driven unit. The auxiliary driven unit is used to provide a continuous external force to the top contact anti-leakage unit to ensure the tightness of the top contact. Each top contact anti-leakage unit is equipped with a set of auxiliary driven units. Several pressure-triggered units are installed on the docking assembly plate 2 (300). The pressure-triggered units are connected to the top contact anti-leakage unit and will activate to run the auxiliary driven unit when the medium is introduced into the rubber hose (200) and the conveying metal pipe (301).

2. The marine flexible axial extrusion corrosion-resistant joint according to claim 1, characterized in that: The inner wall of the second (300) docking assembly piece (100) opposite to the first (100) has a reserved assembly groove that is adapted to the outer edge (201), and the outer edge (201) will be located in the assembly groove.

3. A marine flexible axial extrusion corrosion-resistant joint according to claim 2, characterized in that: The top contact leak prevention unit includes a movable chamber (601) reserved on the side of the docking assembly piece two (300) near the assembly piece one (100). The inner side of the movable chamber (601) is connected to an air chamber (603) installed inside the docking assembly piece two (300). A circular seal (602) is slidably connected in the movable chamber (601).

4. A marine flexible axial extrusion corrosion-resistant joint according to claim 3, characterized in that: The cross-section of the activity chamber (601) is "T" shaped. The circular seal (602) is adapted to the activity chamber (601) and is also "T" shaped in cross-section. The thickness of the two extended sides of the circular seal (602) is less than that of the two extended sides of the activity chamber (601). A circular groove is reserved on the inner side of the circular seal (602).

5. A marine flexible axial extrusion corrosion-resistant joint according to claim 4, characterized in that: The top contact leak prevention unit is installed in two sets, and the active chamber (601), circular seal (602) and air chamber (603) in the two sets of top contact leak prevention units are all circular. The perimeter of the active chamber (601), circular seal (602) and air chamber (603) on the edge is greater than that of the active chamber (601), circular seal (602) and air chamber (603) on the inner side.

6. A marine flexible axial extrusion corrosion-resistant joint according to claim 5, characterized in that: The auxiliary driven unit includes several constraint rods (701), which are arranged in a circular and equally spaced manner in the air chamber (603). The same driven circular bar (706) is slidably connected to one side of the constraint rods (701) near the circular seal (602). The same transmission circular bar (704) is also slidably connected to the constraint rods (701). A baffle (702) is installed on each constraint rod (701). Several springs (705) are installed between the driven circular bar (706) and the transmission circular bar (704) and cover the corresponding constraint rod (701). Several wire interfaces (703) are reserved on one side of the air chamber (603) away from the circular seal (602). The orientation of the wire interfaces (703) is adapted to the corresponding constraint rod (701).

7. A marine flexible axial extrusion corrosion-resistant joint according to claim 6, characterized in that: The threaded interface (703) is threaded to the inner side of the constraint rod (701), and the constraint rod (701) is fixed to the docking assembly piece two (300) via the threaded interface (703). The constraint rod (701) penetrates the driven round bar (706) and the transmission round bar (704).

8. A marine flexible axial extrusion corrosion-resistant joint according to claim 7, characterized in that: The driven round bar (706) is adapted to the circular groove of the circular seal (602), and the transmission round bar (704) is adapted to the size of the air chamber (603).

9. A marine flexible axial extrusion corrosion-resistant joint according to claim 8, characterized in that: The pressure-triggered units are divided into two groups and installed in equal intervals. Each group of pressure-triggered units is connected to a corresponding top contact anti-leakage unit. The distance between the two sides of the pressure-triggered unit connected to the inner top contact anti-leakage unit is smaller than the distance between the two sides of the pressure-triggered unit connected to the edge top contact anti-leakage unit. The pressure-triggered unit includes an assembly cavity (401), which is pre-installed on the docking assembly piece two (300). A base platform (402) is threaded to one side of the assembly cavity (401) near the inner wall of the docking assembly piece two (300). A fixing rod (403) is mounted on one side of the base platform (402), and an upper stop platform (405) is fixed to the other side of the fixing rod (403). A sliding platform is slidably connected to the fixing rod (403). (404) A spring (406) is installed between the sliding platform (404) and the upper stop platform (405). An air outlet (4051) is reserved at equal intervals on the upper stop platform (405). A leak (4021) is reserved at equal intervals on the base platform (402). A number of equally spaced blocking strips (4041) are fixedly connected to one side of the sliding platform (404) near the base platform (402). The blocking strips (4041) are adapted to the leaks (4021).

10. A marine flexible axial extrusion corrosion-resistant joint according to claim 9, characterized in that: The assembly cavity (401) has pre-reserved threads at the opening of the inner wall of the mating assembly piece two (300). The assembly cavity (401) close to the rubber hose (200) is connected to the air chamber (603) with a small circumference, and the assembly cavity (401) away from the rubber hose (200) is connected to the air chamber (603) with a large circumference.

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