Cable connector and connecting method thereof

Abstract

The invention belongs to the technical field of cable installation accessories, and particularly relates to a cable connector and a connection method thereof.The cable connector comprises two joints, a winding hoop and an early warning board, and waterproof horn covers and inner frameworks located in the waterproof horn covers are installed outside the two joints; the winding hoop is installed at an opening of the waterproof horn cover, double-pointed shuttles with radians are fixed to the two ends of the winding hoop, threading holes are formed in the two double-pointed shuttles, an annular main water-soluble thread, an inner magnet ring and an auxiliary water-soluble thread connected with the connector are arranged in the middle of the winding hoop side by side, and the edge of the main water-soluble thread protrudes and penetrates through the threading holes in a protruding mode. A clamping hook used for clamping a main water-soluble thread and a hanging ring used for clamping an auxiliary water-soluble thread are fixed to the two faces of the inner magnet ring respectively, and the early warning plate and the connector are arranged in a spaced mode. When water seepage occurs, the winding hoop rebounds through breakage of the water soluble line, the waterproof horn cover can be opened to be attached to the inner wall of the waterproof sleeve, water flow is blocked, and the early warning plate is driven to fall off for warning.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable installation fittings, and particularly relates to a cable connector and a connection method thereof. Background Art

[0002] Cable connectors can be used for signal transmission and also for cable connection in a power distribution network. Especially for some beach photovoltaic power stations, they can meet the demand for large-scale cable laying. These cables are used in large quantities, and it is difficult to ensure that a single wire runs the entire length. During wiring, reinforcement is required. It generally includes two ends that can be engaged with each other, used to insert the wire ends of two cables, and hot melt adhesive or rubber gaskets are used for waterproofing.

[0003] The cable joints in beach photovoltaic power stations have a large workload, a large number of cables are used, and the span is large. Most of the joint positions are exposed outside the photovoltaic panels. In addition, due to the daily tidal changes in the beach, water immersion occurs. Mainly, measures such as waterproof sleeves, waterproof boxes, heat shrinkable tubes, and cold shrinkable sleeves are used to protect the cables, which are fixed on brackets or the ground to isolate the cable connectors at the joint positions from external water bodies. This kind of protection measure is not absolutely safe and has the following problems: Due to the tidal changes in the beach, the waterproof sleeve is alternately soaked by seawater and exposed to sunlight, which is easy to age and rupture locally, causing water leakage and soaking the cable connector.

[0004] Secondly, after the waterproof sleeve ages locally, it is easy to rupture, and the rupture opening is relatively fine and not easy to be discovered in time, so that the cable connector may be soaked for a long time in an undetected state, causing corrosion damage. Summary of the Invention

[0005] The purpose of the present invention is to provide a cable connector and a connection method thereof, which can make the hoop rebound when water seeps through the fracture of the water-soluble line, open the waterproof horn cover to stick to the inner wall of the waterproof sleeve, block the water flow, and drive the warning plate to fall for warning.

[0006] The technical solution adopted by the present invention is specifically as follows: A cable connector, comprising: Two connectors, waterproof horn covers are installed outside both of the two connectors, and an inner skeleton is located inside the waterproof horn covers; The hoop is installed at the opening of the waterproof horn cover, and double-pointed shuttles with arcs are fixed at both ends thereof. Threading holes are provided on both of the double-pointed shuttles. In the middle of the hoop, a main water-soluble wire, an inner magnet ring and a sub-water-soluble wire connected to the joint are arranged side by side in a ring shape. The edge of the main water-soluble wire protrudes and the protrusion passes through the threading hole. Hooks for clamping the main water-soluble wire and suspension rings for clamping the sub-water-soluble wire are respectively fixed on two sides of the inner magnet ring. When encountering water, the main water-soluble wire and the sub-water-soluble wire break, so that the hoop opens the waterproof horn cover to block water flow; The warning board is arranged at an interval from the joint. Outer magnets for attracting the inner magnet ring and sealing gaskets for waterproofing are fixedly arranged at intervals on the warning board, and when the inner magnet ring drops and is separated from the outer magnet when encountering water, the warning board is driven to drop for warning.

[0007] As an alternative, the waterproof horn cover includes a flexible ring, a face mask and a rubber ring sequentially arranged outside the joint. The face mask is connected to the inner skeleton, and a stainless steel limit ring sleeving outside the hoop is fixed inside the rubber ring.

[0008] As an alternative, the inner skeleton includes spokes fixed to the inner wall of the face mask. One end of the spoke away from the face mask is hinged with a movable rib rod, and the other end of the movable rib rod away from the spoke is slidably connected to a chute, and the chute is connected to the joint.

[0009] As an alternative, a threaded section is fixed on the outside of one joint, and a threaded sleeve adapted to the threaded section is rotatably installed on the outside of the other joint. A sealing rubber ring for pressing against the end face of the threaded section is fixed on the inner wall of the threaded sleeve.

[0010] As an alternative, water-stop bushings for binding cables and hollow conductive clamping claws for binding wire heads are fixedly arranged along the axial direction inside both joints. One group of the hollow conductive clamping claws is electrically connected to a conductive plug, and the other group of the hollow conductive clamping claws is electrically connected to a conductive socket.

[0011] As an alternative, limit lugs with arcs are integrally installed at one end of each of the two joints away from each other. An outer sheath tube for binding the limit lugs is installed outside the two joints, and the outside of the outer sheath tube is fixedly connected to one side of the chute.

[0012] As an alternative, insulating bushings are installed at the openings of both of the outer sheath tubes, and both of the insulating bushings partially extend into the outer sheath tubes for pressing against the limit lugs.

[0013] As an optional solution, a frosted protrusion separated from the inner frame is embedded on the outer side of the rubber ring, and a wedge-shaped groove for sticking to the wall is opened on the frosted protrusion, so that the frosted protrusion can adsorb the tube wall through the wedge-shaped groove when the rubber ring sticks to the wall to prevent falling off.

[0014] As an optional solution, reflective strips and hanging ropes are fixed at intervals on the outside of the warning board. The reflective strips reflect light beams to attract attention. The hanging ropes are made of waterproof fiber material and are pulled when the warning board falls to prevent it from being washed away by water.

[0015] A connection method comprises the following steps: Step 1: prefabricate the waterproof speaker cover and the inner frame in the factory, glue them to the outside of the joint, and glue the outer magnet and the sealing gasket to the inner arc surface of the early warning board; Step 2: sleeve the inner magnet ring and the hoop, suspend the inner magnet ring by using the main water-soluble line and the auxiliary water-soluble line, and pull the hoop at the same time, so that the waterproof speaker cover and the inner frame are in a closed state; Step 3: The connector is sent to the construction site of the tidal flat photovoltaic power station and assembled together, and the insulation layer of the cable ends is stripped to expose the conductive wire ends and connect them to the connector; Step 4: Put the outer sheath tube with the waterproof horn cover and the inner frame onto the outside of the joint and glue them with sealing glue to ensure a secure installation; Step 5: When water seeps in, the main water-soluble line and the auxiliary water-soluble line are broken when encountering water, so that the inner magnet ring falls off to reduce the attraction to the warning board, and at the same time, the hoop is loosened, and the waterproof speaker cover and the inner frame are opened like an umbrella under the rebound effect of the hoop, and are attached to the wall in the waterproof casing to block water seepage; Step 6: When the inner magnet ring falls, the magnetic attraction is reduced, so that the warning plate falls off under its own weight, which is used to warn of water ingress.

[0016] The technical effects achieved by the present invention are: The present invention prefabricates a hoop in a factory, compresses it in a spiral shape and binds it with a water-soluble line. A main water-soluble line and an auxiliary water-soluble line are used to pull two double-pointed shuttles to compress the hoop while suspending an inner magnet ring. The inner magnet ring drives an outer magnet and an early warning board to be suspended in the air in the waterproof casing through magnetic attraction. Once water seepage occurs, the water-soluble line breaks, and the hoop rebounds to open the waterproof horn cover to stick to the inner wall of the waterproof casing, blocking the water flow and driving the early warning board to fall for warning.

[0017] In order to timely block water seepage, once the hoop rebounds, the flexible ring, the mask and the rubber ring can be opened in an umbrella shape. Moreover, through the connection between the mask and the inner skeleton, the rubber ring can be supported to closely adhere to the inner wall of the waterproof sleeve along the circular path, forming a closed layer to block water seepage. In addition, the outer side of the rubber ring is subjected to frosted treatment, and the connector is vertically supported by using the friction with the waterproof sleeve to buffer the vertical force brought by water seepage.

[0018] In order to stably open the waterproof bellows, the spokes are distributed in a circumferential array, which can circumferentially support the mask. Multiple triangular stable structures are formed by the chute, the movable rib and the spokes, and the outer sheath is adhesively bonded to one side of the chute before leaving the factory to stably support the waterproof bellows and drive the joint to be centered, preventing side leakage caused by the skew of the connector. Brief Description of the Drawings

[0019] Figure 1 is a perspective view of the cable connector placed in the waterproof sleeve in the first embodiment of the present invention; Figure 2 is a front view of the wiring state of two joints in the first embodiment of the present invention; Figure 3 is a front view of a single joint in the state of removing the waterproof bellows in the first embodiment of the present invention; Figure 4 is a front view of two joints in the state of preparing to be inserted in the first embodiment of the present invention; Figure 5 is a top view of the hoop in the first embodiment of the present invention; Figure 6 is a bottom view of the hoop in the first embodiment of the present invention; Figure 7 is a cross-sectional view of a single joint in the first embodiment of the present invention; Figure 8 is a front view of the waterproof bellows in the first embodiment of the present invention; Figure 9 is a schematic structural view of the inner skeleton in the first embodiment of the present invention; Figure 10 is a schematic structural view of the insulating bushing in the first embodiment of the present invention; Figure 11 is a front view of a single warning board in the first embodiment of the present invention; Figure 12 is a flow chart of the connection method in the second embodiment of the present invention.

[0020] In the drawings, the list of components represented by each reference numeral is as follows: 1. Connector; 2. Wrapping hoop; 201. Double-pointed shuttle; 202. Threading hole; 203. Main water-soluble thread; 204. Inner magnet ring; 205. Hook; 206. Suspension ring; 207. Sub water-soluble thread; 3. Warning plate; 301. Outer magnet; 302. Sealing gasket; 4. Flexible ring; 5. Face mask; 6. Rubber ring; 7. Stainless steel limit ring; 8. Spoke; 9. Movable rib rod; 10. Chute; 11. Threaded section; 12. Threaded sleeve; 13. Sealing rubber ring; 14. Water-stop bushing; 15. Hollow conductive jaw; 16. Conductive plug; 17. Conductive socket; 18. Limit fin; 19. Outer sheath tube; 20. Insulating bushing; 21. Frosted protrusion; 22. Wedge-shaped groove; 23. Reflective strip; 24. Suspension rope. Detailed implementation manner

[0021] In order to make the purpose and advantages of the present invention clearer and more understandable, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0022] During the construction of a beach photovoltaic power station, measures such as waterproof sleeves, waterproof boxes, heat shrinkable tubes, and cold shrinkable sleeves can be used to protect the cables, fix them on the brackets or the ground, and isolate the cable connectors at the joint positions from external water bodies. Especially at the joint of two cables, after being wrapped by the cable connector, it can be placed in the waterproof sleeve.

[0023] Embodiment 1: As Figures 1 - 11 shown, a cable connector includes two connectors 1, a wrapping hoop 2, and a warning plate 3. Waterproof horn covers are installed outside both of the two connectors 1, and inner skeletons are located inside the waterproof horn covers. It can be prefabricated in the factory. The wrapping hoop 2 is spirally compressed and bound with water-soluble threads, and is installed outside the connector 1 in a closed state in cooperation with the waterproof horn cover and the inner skeleton, and then sent to the construction site of the beach photovoltaic power station to connect the two cable ends, placed in the waterproof sleeve, and the warning plate 3 is magnetically adsorbed on the outer wall of the waterproof sleeve. Thus, when encountering water, the water-soluble thread dissolves and breaks to make the wrapping hoop 2 open the waterproof horn cover to stick to the inner wall of the waterproof sleeve, blocking the water flow and driving the warning plate 3 to fall for warning.

[0024] Refer to the attached Figure 3 , Figure 4 and Figure 7, the joint 1 is in a disassembled state when leaving the factory and is assembled together at the construction site of the beach photovoltaic power station. To achieve electrical connection, first, the insulating layers of the two cable ends need to be stripped. Inside each of the two joints 1, a water-stop bushing 14 for binding the cable is adhesively bonded along the axial direction and a hollow conductive jaw 15 for binding the wire end is welded. The conductive wire end is passed through the water-stop bushing 14 and inserted into the hollow conductive jaw 15. One set of hollow conductive jaws 15 is electrically connected to a conductive plug 16, and the other set of hollow conductive jaws 15 is electrically connected to a conductive socket 17. Subsequently, the two joints 1 are butted and the conductive plug 16 is inserted tightly into the conductive socket 17 to ensure that current can be transmitted between the two cables.

[0025] Further, each set of hollow conductive jaws 15 is set to three, surrounding a conductive wire end. In particular, the hollow conductive jaws 15 are in the shape of an elliptical ring and can deform under the action of the conductive wire end and can clamp the conductive wire end when rebounding. For the case where a cable has multiple wire ends, the number of hollow conductive jaws 15, conductive plugs 16, and conductive sockets 17 inside each joint 1 can be adaptively increased.

[0026] Refer to the appendix Figure 3 and Figure 7 , lack of cable limit will cause the wire ends to loosen. Therefore, in this embodiment, arc-shaped limiting fins 18 are integrally installed at both ends of the two joints 1 that are far away from each other. The cable is fixed by the inwardly curved ends of the limiting fins 18 clamping towards the middle. When the cable needs to be inserted, the limiting fins 18 can be pried open with a screwdriver. To fix these limiting fins 18, an outer sheath 19 for binding the limiting fins 18 is installed outside the two joints 1. The cable needs to be passed through the outer sheath 19 in advance. After the conductive wire ends are clamped, the outer sheath 19 is then sleeved outside the joint 1. It can be adhesively bonded with sealant glue or installed firmly by means of threaded installation.

[0027] Further, an annular protrusion is integrally installed inside the outer sheath 19. When the outer sheath 19 is sleeved on the joint 1, it can circumferentially squeeze the limiting fins 18 to make these limiting fins 18 close towards the middle to clamp the cable.

[0028] Refer to the appendix Figure 2 and Figure 10 , to seal the connection between the outer sheath 19 and the cable, in this embodiment, insulating bushings 20 are adhesively bonded at the openings of the two outer sheaths 19. The two insulating bushings 20 wrap the cable in a petal shape, and both insulating bushings 20 partially extend into the outer sheath 19 to abut against the limiting fins 18. After installation, it can be adhesively bonded with sealant glue or bonded with photo-curing resin.

[0029] Refer to the appendix Figure 2 and Figure 7, after the conductive wire heads are installed, in order to facilitate the quick docking of the two connectors 1, in this embodiment, a threaded section 11 is welded on the outside of one connector 1, and a threaded sleeve 12 adapted to the threaded section 11 is rotatably installed on the outside of the other connector 1. By sleeving the threaded sleeve 12 on the threaded section 11 and tightening it, while quickly aligning the two connectors 1, the two connectors 1 can also be tightened. However, the sealing performance of the thread is insufficient, and the threaded gap is closed by bonding a sealing rubber ring 13 for pressing against the end face of the threaded section 11 on the inner wall of the threaded sleeve 12, improving the waterproof performance of the connection of the connector 1.

[0030] After the cable connection is completed and inserted into the waterproof sleeve, in order to be able to insert smoothly, the connector it uses should be thinner than the waterproof sleeve. There is therefore a gap between the connector and the waterproof sleeve. Once the waterproof sleeve ages and cracks due to the two effects of seawater immersion and sunlight exposure, water will seep along the gap, soaking the cable and its connector.

[0031] Refer to the appendix Figure 3 、 Figure 5 and Figure 6 , in order to block the seeping water in time, in this embodiment, the winding hoop 2 is installed at the opening of the waterproof bell mouth, and double-pointed shuttles 201 with arcs are welded at both ends thereof. The two double-pointed shuttles 201 can be pulled to compress the winding hoop 2 before leaving the factory. Thread holes 202 for passing through the water-soluble wire are opened on both of the two double-pointed shuttles 201, and a main water-soluble wire 203, an inner magnet ring 204, and an auxiliary water-soluble wire 207 connected to the connector 1 are arranged side by side in a ring shape in the middle of the winding hoop 2. By the edge of the main water-soluble wire 203 protruding and passing through the thread hole 202, the two double-pointed shuttles 201 are tightened to restrain the winding hoop 2. Hooks 205 and suspension rings 206 are respectively adhered to both sides of the inner magnet ring 204 to respectively catch the main water-soluble wire 203 and the auxiliary water-soluble wire 207, realizing the stable suspension of the inner magnet ring 204 by the water-soluble wire. Whether water seeps from above or below the connector, the main water-soluble wire 203 and the auxiliary water-soluble wire 207 will always break when encountering water, and the inner magnet ring 204 will drop, reducing the attraction effect on the warning board 3. At the same time, the winding hoop 2 is loosened, and under the rebounding action of the winding hoop 2, the waterproof bell mouth and the inner skeleton are opened in an umbrella shape, adhering to the inner wall of the waterproof sleeve to block the seeping water, avoiding soaking the cable connection, and leaving a certain buffer time for maintenance.

[0032] If the waterproof sleeve ages and has slight cracks, water will seep. And the slightly cracked places are not easy to observe. Coupled with the fact that the connector is inside it, the immersion state cannot be directly understood. It may cause the cable connection to be soaked in water for a long time until the cable leaks or breaks before it can be discovered.

[0033] Refer to the appendix Figure 1 and Figure 11, to give an early warning of water inflow in a timely manner, in this embodiment, the warning plate 3 is arranged at an interval from the joint 1. To facilitate the warning plate 3 to be attached to the outer wall of the waterproof casing, through the action of the outer magnet 301 fixed at intervals on the warning plate 3 for attracting the inner magnet ring 204 and the sealing gasket 302 for waterproofing, it can be magnetically attached to the outer wall of the waterproof casing. The gap between the warning plate 3 and the waterproof casing is sealed with the sealing gasket 302, and the warning plate 3 is designed with an arc edge to buffer the water waves during high tide and prevent it from being washed away by the water waves. Then, when the inner magnet ring 204 drops, the magnetic attraction effect can be reduced, so that the warning plate 3 falls off under its own weight for warning of water inflow.

[0034] Among them, after one inner magnet ring 204 above the connector drops, it may be caught by the adjacent waterproof bell cover, resulting in a relatively slow separation of the inner magnet ring 204 from the outer magnet 301. However, at this time, the outer magnet 301 is hardly affected by the magnetic attraction, causing the upper end of the warning plate 3 to open relative to the part of the waterproof casing. Coupled with the seepage of water above, it indicates that the external tide has submerged the warning plate 3 at this time, causing the tide to wash away the warning plate 3 along the opened part, and the warning function can be fully realized.

[0035] Refer to the appendix Figure 2 and Figure 8 , in order to block the seepage of water in a timely manner, the waterproof bell cover includes a flexible ring 4, a face mask 5 and a rubber ring 6 that are adhesively bonded in sequence on the outside of the joint 1 in the order of increasing diameter. Once the hoop 2 rebounds, the hoop 2 is limited by a plurality of stainless steel limiting rings 7 sleeved on the outside of the hoop 2 and adhesively bonded to the inner side of the rubber ring 6. For example, four stainless steel limiting rings 7 are provided, which can limit the hoop 2 along a circular path, so that the hoop 2 can open the flexible ring 4, the face mask 5 and the rubber ring 6 in an umbrella shape. Also, through the connection between the face mask 5 and the inner skeleton, it can support the rubber ring 6 to closely adhere to the inner wall of the waterproof casing along a circular path to form a closed layer to block the seepage of water. And the outer side of the rubber ring 6 is treated with frosting, and the connector is vertically supported by using the friction with the waterproof casing to buffer the vertical force brought by the seepage of water.

[0036] Refer to the appendix Figure 3 , Figure 8 and Figure 9 , since the waterproof bell cover is relatively soft and prone to deformation and skew, in order to open it stably, the inner skeleton of this embodiment includes a plurality of spokes 8 adhesively bonded to the inner wall of the face mask 5. For example, eight spokes 8 are provided and distributed in a circumferential array, which can support the face mask 5 circumferentially. One end of the spoke 8 away from the face mask 5 is hinged with a movable rib 9. Through the sliding connection of the end of the movable rib 9 away from the spoke 8 with a chute 10, a plurality of triangular stable structures are formed by the movable rib 9 and the spoke 8. And the outer sheath 19 is adhesively bonded to one side of the chute 10 before leaving the factory, so that the chute 10 is connected to the joint 1 through the outer sheath 19, stably supporting the waterproof bell cover and driving the joint 1 to be centered to prevent side leakage caused by the skew of the connector.

[0037] Refer to the attached Figure 2 , Figure 3 and Figure 8 . To enhance the wall adhesion friction, in this embodiment, a matte protrusion 21 separated from the inner skeleton is embedded outside the rubber ring 6, driving the matte protrusion 21 to stick to the inner wall of the waterproof casing, increasing the friction between the waterproof casing and the rubber ring 6, and wedge-shaped grooves 22 for wall adhesion are provided on the matte protrusions 21, which can increase the friction area. Especially when the matte protrusion 21 deforms, the negative pressure generated by exhausting air can suck tightly against the inner wall of the waterproof casing.

[0038] Refer to the attached Figure 1 and Figure 11 . Reflective strips 23 and suspension ropes 24 are adhesively bonded at intervals on the outside of the warning board 3. The reflective strips 23 can reflect light, facilitating the inspection personnel to see. One end of the suspension rope 24 far from the warning board 3 can be adhered to the outer wall of the waterproof casing to prevent the warning board 3 from being washed away by water flow for subsequent recycling and reuse. The suspension rope 24 is made of waterproof fiber material and does not significantly increase the weight of the warning board 3.

[0039] Embodiment Two: In order to enable the staff to conveniently connect two cables and conveniently complete the cable connector given in Embodiment One, an operation method for implementing cable connection is given in Embodiment Two.

[0040] As Figures 1 - 12 shown, a connection method for a cable connector includes the following steps: Step One: Prefabricate a waterproof bell cover and an inner skeleton in the factory, bond them to the outside of the outer sheath tube 19, and bond the outer magnet 301 and the sealing gasket 302 to the inner arc surface of the warning board 3; Step Two: Sleeve the inner magnet ring 204 and the winding hoop 2, suspend the inner magnet ring 204 by using the main water-soluble wire 203 and the secondary water-soluble wire 207, and at the same time hold the winding hoop 2 to make the waterproof bell cover and the inner skeleton in a closed state; Among them, the winding hoop 2 is limited along a circular path by a plurality of stainless steel limit rings 7 to prevent it from running off track inside the waterproof bell cover; Step Three: When the joint 1 leaves the factory, it is in a disassembled state and is sent to the construction site of the tidal flat photovoltaic power station and then combined together. In order to achieve electrical connection, first, strip the insulation layers of the two cable ends, insert the conductive wire ends through the water-stop bushing 14 into the hollow conductive jaws 15, and after the two joints 1 are butted, insert the conductive plug 16 tightly into the conductive socket 17 to ensure that current can be transmitted between the two cables; Step Four: Then, put the outer sheath tube 19 carrying the waterproof bell cover and the inner skeleton over the outside of the joint 1, and it can be installed firmly by using sealant bonding or threaded installation; Step 5: Whether water seeps from above or below the connector, the main water-soluble line 203 and the auxiliary water-soluble line 207 are broken when encountering water, so that the inner magnet ring 204 falls and reduces the attraction to the warning board 3. At the same time, the hoop 2 is loosened, and the waterproof speaker cover and the inner frame are opened like an umbrella under the rebound effect of the hoop 2. The waterproof casing is attached to the wall to block water seepage and avoid soaking the cable connection, leaving a certain buffer time for maintenance; Step 6: When the inner magnet ring 204 falls, the magnetic attraction is reduced, so that the warning plate 3 falls off under its own weight, which is used to warn of water ingress.

[0041] The above is only an optional implementation of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A cable connector, characterized in that, Including: Two connectors (1), on the outside of each of the two connectors (1), a waterproof horn cover and an inner skeleton located inside the waterproof horn cover are installed; A hoop (2), the hoop (2) is installed at the opening of the waterproof horn cover, and at both ends of the hoop (2), double-pointed shuttles (201) with arcs are fixed. Threading holes (202) are provided on both of the two double-pointed shuttles (201). In the middle of the hoop (2), a main water-soluble wire (203), an inner magnet ring (204), and a secondary water-soluble wire (207) connected to the connector (1) are arranged side by side in a ring shape. The edge of the main water-soluble wire (203) protrudes and the protrusion passes through the threading hole (202). On both sides of the inner magnet ring (204), a hook (205) for clamping the main water-soluble wire (203) and a hanging ring (206) for clamping the secondary water-soluble wire (207) are respectively fixed. When encountering water, the main water-soluble wire (203) and the secondary water-soluble wire (207) break, so that the hoop (2) opens the waterproof horn cover to block the water flow; An early warning board (3), the early warning board (3) is arranged at an interval from the connector (1). On the early warning board (3), an external magnet (301) for attracting the inner magnet ring (204) and a sealing gasket (302) for waterproofing are fixed at intervals. When the inner magnet ring (204) drops and is separated from the external magnet (301) when encountering water, the early warning board (3) is driven to drop for warning.

2. The cable connector according to claim 1, characterized in that: The waterproof horn cover includes a flexible ring (4), a face mask (5), and a rubber ring (6) sequentially arranged outside the connector (1). The face mask (5) is connected to the inner skeleton, and a stainless steel limit ring (7) sleeved outside the hoop (2) is fixed inside the rubber ring (6).

3. A cable connector according to claim 2, characterized in that: The inner skeleton includes spokes (8) fixed to the inner wall of the face mask (5). One end of the spoke (8) away from the face mask (5) is hinged with a movable rib rod (9). One end of the movable rib rod (9) away from the spoke (8) is slidably connected to a chute (10), and the chute (10) is connected to the connector (1).

4. A cable connector according to claim 1, characterized in that: A threaded section (11) is fixed on the outside of one of the connectors (1), and a threaded sleeve (12) adapted to the threaded section (11) is rotatably installed on the outside of the other connector (1). A sealing rubber ring (13) for pressing against the end face of the threaded section (11) is fixed on the inner wall of the threaded sleeve (12).

5. A cable connector according to claim 1, characterized in that: Inside each of the two connectors (1), a water-stop bushing (14) for binding the cable and a hollow conductive clamping jaw (15) for binding the wire head are fixed along the axis. One group of the hollow conductive clamping jaws (15) is electrically connected to a conductive plug (16), and the other group of the hollow conductive clamping jaws (15) is electrically connected to a conductive socket (17).

6. The cable connector according to claim 3, wherein: At one end of each of the two connectors (1) away from each other, a limit flap (18) with an arc is integrally installed. An outer sheath tube (19) for binding the limit flap (18) is installed outside the two connectors (1), and the outside of the outer sheath tube (19) is fixedly connected to one side of the chute (10).

7. A cable connector according to claim 6, characterized in that: Insulating bushings (20) are installed at the openings of the two outer sheath tubes (19), and the two insulating bushings (20) partially extend into the outer sheath tubes (19) to tightly press against the limiting fins (18).

8. A cable connector according to claim 2, characterized in that: Matte protrusions (21) separated from the inner skeleton are embedded on the outer side of the rubber ring (6). Wedge-shaped grooves (22) for wall attachment are formed on the matte protrusions (21), so that when the matte protrusions (21) adhere to the wall along with the rubber ring (6), the wall is adsorbed through the wedge-shaped grooves (22) to prevent falling off.

9. A cable connector according to claim 1, wherein: Reflective strips (23) and suspension ropes (24) are fixedly arranged at intervals on the outer side of the warning board (3). The reflective strips (23) reflect light beams to attract attention. The suspension ropes (24) are made of waterproof fiber materials and are pulled when the warning board (3) falls to prevent it from being washed away by water flow.

10. A connection method, applied to the cable connector according to any one of claims 1-9, characterized in that, It includes the following steps: Step 1: Prefabricate the waterproof horn cover and the inner skeleton in the factory, stick them to the outside of the joint (1), and stick the outer magnet (301) and the sealing gasket (302) to the inner arc surface of the warning board (3); Step 2: Sleeve the inner magnet ring (204) and the hoop (2), use the main water-soluble wire (203) and the secondary water-soluble wire (207) to suspend the inner magnet ring (204), and at the same time pull the hoop (2) to make the waterproof horn cover and the inner skeleton in a closed state; Step 3: Send the joint (1) to the construction site of the tidal flat photovoltaic power station to be combined together, strip the insulating layer of the cable head, and expose the conductive wire head to connect to the joint (1); Step 4: Then put the outer sheath tube (19) with the waterproof horn cover and the inner skeleton over the outside of the joint (1) and bond it with sealing glue for firm installation; Step 5: When water seeps in, the main water-soluble wire (203) and the secondary water-soluble wire (207) break when encountering water, so that the inner magnet ring (204) drops to reduce the attraction to the warning board (3). At the same time, loosen the hoop (2), and under the rebounding action of the hoop (2), the waterproof horn cover and the inner skeleton are opened in an umbrella shape and adhere to the wall inside the waterproof sleeve to block water seepage; Step 6: When the inner magnet ring (204) drops, the magnetic attraction effect is reduced, so that the warning board (3) falls off under its own weight for warning of water ingress.

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