An underwater wet-plug connector with auxiliary structure

Abstract

The embodiment of the present application provides an underwater wet plug connector with an auxiliary structure, which relates to the technical field of underwater connectors. The underwater wet plug connector with an auxiliary structure includes: a male plug, a female plug telescopic shell assembly, an end cover shell, a first sealing baffle assembly, a second sealing baffle assembly and a rotating connection assembly. The end cover shell is sleeved on the outside of the female plug, and a first convex ring is provided at the port of the end cover shell. The second sealing baffle assembly is installed on the end cover shell to block the inner end face of the sealed end cover shell; the telescopic shell assembly includes a back plate, a corrugated shell and a limit shell, the back plate is sleeved on the outside of the male plug, and the two ends of the corrugated shell are respectively connected to the back plate and the limit shell, and the first sealing baffle assembly is installed on the limit shell to block the inner end face of the sealed limit shell. The underwater wet plug connector with an auxiliary structure can realize the smooth completion of the wet plugging of the male plug and the female plug inside the diving area, and improve the speed and efficiency of cable construction and subsequent maintenance.

Description

Technical Field

[0001] The present application relates to the technical field of underwater connectors, and in particular to an underwater wet-plug connector with an auxiliary structure. Background Art

[0002] Due to the high precision, complex structure and high cost of wet-plug connectors, they are generally used in cable laying in deep-sea areas. The detection cable lines laid in diving areas such as the sea, lakes, and rivers mostly use dry plug-in and pull-out methods. When inspecting cables in shallow water areas, the cable area needs to be moved out of the water before plugging and unplugging operations can be carried out. Due to the heavy weight of the cable, it is also very difficult to move some sections of the cable out of the water. In addition, in order to protect the female or male connector after the connector is plugged in and out, the connector needs to be waterproofed, which not only has low plug-in efficiency, but also causes the entire inspection and maintenance work to take a long time. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an underwater wet plug connector with an auxiliary structure to solve the problem that the detection cable lines set up in diving areas such as the sea, lakes, and rivers are mostly dry plug-in, and when the cables in shallow water areas are inspected, the cable area needs to be moved out of the water before the plug-in operation can be carried out.

[0004] According to an embodiment of the present application, an underwater wet-plug connector with an auxiliary structure includes: a male plug, a female plug telescopic shell assembly, an end cover shell, a first sealing barrier assembly, a second sealing barrier assembly and a rotating connection assembly.

[0005] The end cover is sleeved on the outside of the female plug, and a first convex ring is provided at the port of the end cover, and the second sealing baffle assembly is installed on the end cover to block the inner end surface of the sealing end cover;

[0006] The telescopic shell assembly includes a back plate, a corrugated shell and a limit shell, the back plate is sleeved on the outside of the male plug, and the two ends of the corrugated shell are respectively connected to the back plate and the limit shell, the first sealing baffle assembly is installed on the limit shell to dismantle the inner end surface of the sealing limit shell, and the movable end surface of the first sealing baffle assembly is provided with an air outlet pipe, and the outside of the air outlet pipe is provided with a first one-way valve;

[0007] The rotating connection assembly includes a rotating ring part and a second convex ring, the rotating ring part is rotatably connected to the limit shell and the second convex ring, the second convex ring and the rotating ring part are threadedly detachably arranged, the rotating ring part is radially provided with a drainage hole, a water outlet pipe is arranged outside the drainage hole, and a second one-way valve is arranged on the water outlet pipe, a counterweight assembly connected to the rotating ring part is arranged outside the water outlet pipe, and a slot is opened on the outside of the second convex ring.

[0008] Preferably, the first sealing baffle assembly and the second sealing baffle assembly have the same structural specifications. The first sealing baffle assembly includes a partition, a top shell and an adjusting bolt. The top shell is fixed to the top of the limiting shell. An inner cavity is provided inside the top shell. A through opening communicating with the inner cavity is provided at the top of the limiting shell. The adjusting bolt is threaded through the top wall of the top shell, and the bottom end of the adjusting bolt is rotatably connected to the partition.

[0009] Preferably, the bottom wall and both sides of the end cover shell are provided with slots matching with the partitions.

[0010] Preferably, the air outlet pipe passes through the partition in the first sealing baffle assembly.

[0011] Preferably, a sealing portion is provided between the end cover and the female plug and between the back plate and the male plug.

[0012] Preferably, the rotating ring portion includes an inner ring and side rings, the two side rings are respectively fixed on the second convex ring and the opposite end faces of the limiting shell, the inner ring is rotatably arranged between the two side rings, and the drainage hole is arranged at a radial position of the inner ring.

[0013] Preferably, both end surfaces of the inner ring are provided with rolling balls distributed in an annular array, and the side ring close to the inner ring is provided with an annular groove matching with the balls.

[0014] Preferably, the rotating connection assembly further comprises a first sealing ring, and the first sealing ring is arranged at a position where the inner ring and the side ring are in contact with each other and close to the inner wall.

[0015] Preferably, the rotating connection assembly further comprises a second sealing ring, and the second sealing ring is arranged at a position where the inner ring and the side ring are in contact with each other and close to the outer wall.

[0016] Preferably, the places where the inner ring and the side ring are in contact are respectively provided with limiting grooves of annular structures that cooperate with the first sealing ring and the second sealing ring.

[0017] Preferably, the counterweight assembly includes a shell seat, a piston, a nut and a push bolt, the shell seat is fixed to the outside of the inner ring, and the shell seat is provided with a mounting groove that matches the water outlet pipe, an oil storage chamber is provided inside the shell seat, the piston is slidably arranged at the bottom end of the oil storage chamber, the nut is fixed to the bottom of the shell seat, the push bolt is threadedly matched with the nut, and the screw rod of the push bolt movably passes through the bottom wall of the shell seat and is rotatably connected to the piston, oil outlet holes are provided on both sides of the top of the shell seat, a groove is provided on the end face of the inner ring, the ball is rollingly arranged inside the groove, and an oil filling hole connected to the groove and the oil outlet hole is provided inside the inner ring.

[0018] Preferably, the first sealing ring and the second sealing ring are respectively arranged on the inner bottom wall and the inner top wall of the groove close to the end wall.

[0019] The beneficial effects of the present application are as follows: the present application obtains an underwater wet plug connector with an auxiliary structure through the above design. When the male plug and the female plug are plugged in, the first sealing baffle assembly is in the state of the internal cavity of the sealing telescopic shell assembly, that is, the end face of the male plug is isolated from the water. The second sealing baffle assembly is in the state of the internal cavity of the sealing end cover shell, that is, the end face of the female plug is isolated from the water. The rotating ring part at one end of the male plug and the first convex ring at one end of the female plug are butt-connected and installed in a screw connection. When the male plug and the female plug are unplugged, the male plug and the female plug are unplugged in advance, and the first sealing baffle assembly and the second sealing baffle assembly are lowered to seal the limit shell and the end cover shell respectively. Finally, the second convex ring is rotated to separate from the first convex ring. The underwater wet plug connector with an auxiliary structure can realize the smooth completion of the wet plugging and unplugging of the male plug and the female plug inside the diving area, and improve the speed and efficiency of cable construction and subsequent maintenance.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a schematic structural diagram of an underwater wet-plug connector with an auxiliary structure according to an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of the internal structure of an underwater wet-plug connector with an auxiliary structure according to an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of the internal structure of a telescopic shell assembly according to an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of the internal structure of the end cover according to an embodiment of the present application;

[0026] Figure 5 is a schematic diagram of the cross-sectional structure of a first sealing baffle assembly according to an embodiment of the present application;

[0027] Figure 6is a schematic diagram of the cross-sectional structure of a counterweight assembly and a rotating connection assembly according to an embodiment of the present application;

[0028] Figure 7 is a schematic diagram of the cross-sectional structure of the water outlet pipe, the second one-way valve and the inner ring according to an embodiment of the present application;

[0029] Figure 8 is a schematic diagram of the side ring structure according to an embodiment of the present application;

[0030] Fig. 9 According to the embodiment of the present application Figure 7 A partial enlarged structural diagram of part A;

[0031] Fig.10 is a schematic diagram of a partial structure of a cross section of an oil injection hole of an inner ring according to an embodiment of the present application;

[0032] Fig.11 It is a schematic diagram of the structure of a counterweight assembly according to an embodiment of the present application.

[0033] Reference numerals:

[0034] 1. Male plug; 2. Female plug; 3. Telescopic shell assembly; 31. Back plate; 32. Corrugated shell; 33. Limit shell; 34. Slot; 35. Through hole; 36. Sealing part; 4. End cover; 41. First convex ring; 5. First sealing baffle assembly; 51. Baffle; 52. Top shell; 53. Adjusting bolt; 54. Inner cavity; 55. Exhaust pipe; 56. First one-way valve; 6. Second sealing baffle assembly; 7. Rotating connection assembly; 71. Rotating Dynamic ring part; 711, inner ring; 712, side ring; 713, groove; 714, ring groove; 715, ball; 716, oil filling hole; 717, first sealing ring; 718, second sealing ring; 72, second convex ring; 73, drain hole; 74, water outlet pipe; 75, second one-way valve; 76, slot hole; 8, counterweight assembly; 81, shell seat; 82, oil outlet hole; 83, mounting groove; 84, piston; 85, nut; 86, push bolt. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0036] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] An underwater wet-plug connector with an auxiliary structure according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0039] See also Figure 1-Figure 11 According to an embodiment of the present application, an underwater wet-plug connector with an auxiliary structure includes: a male plug 1, a female plug 2, a telescopic shell assembly 3, an end cover shell 4, a first sealing barrier assembly 5, a second sealing barrier assembly 6 and a rotating connection assembly 7.

[0040] Among them, through the cooperation of the telescopic shell assembly 3, the end cover shell 4, the first sealing baffle assembly 5, the second sealing baffle assembly 6, the rotating connection assembly 7 and the counterweight assembly 8, the wet plugging and unplugging operation between the cable male plug 1 and the female plug 2 in the diving area can be realized, which can effectively improve the efficiency of cable laying and subsequent maintenance operations in the diving area.

[0041] See also Figure 1-Figure 4 The end cover 4 is sleeved on the outside of the female plug 2, and a first convex ring 41 is provided at the port of the end cover 4. The second sealing baffle assembly 6 is installed on the end cover 4 to block the inner end surface of the sealing end cover 4. The telescopic shell assembly 3 includes a back plate 31, a corrugated shell 32 and a limit shell 33. The back plate 31 is sleeved on the outside of the male plug 1, and the two ends of the corrugated shell 32 are respectively connected to the back plate 31 and the limit shell 33. The first sealing baffle assembly 5 is installed on the limit shell 33 to block the inner end surface of the sealing limit shell 33. The movable end surface of the first sealing baffle assembly 5 is provided with an air outlet pipe 55, and a first one-way valve 56 is provided outside the air outlet pipe 55. The rotating connection assembly 7 includes a rotating ring portion 71 and a second convex ring 72. The rotating ring portion 71 is rotatably connected to the limit shell 33 and the second convex ring 72. The second convex ring 72 and the rotating ring portion 71 are threadedly disassembled and assembled. The rotating ring portion 71 is radially provided with a drainage hole 73. A water outlet pipe 74 is arranged outside the drainage hole 73, and a second one-way valve 75 is arranged on the water outlet pipe 74. A counterweight assembly 8 connected to the rotating ring portion 71 is arranged outside the water outlet pipe 74. A slot hole 76 is opened on the outside of the second convex ring 72.

[0042] In the underwater wet-plug connector with auxiliary structure, the end cover shell 4, the second sealing barrier assembly 6, the first convex ring 41 and the female plug 2 are an integral part; the telescopic shell assembly 3, the first sealing barrier assembly 5, the rotating connection assembly 7 and the male plug 1 are another integral part.

[0043] When the male plug 1 and the female plug 2 are plugged in, the first sealing baffle assembly 5 is in the state of sealing the internal cavity of the telescopic shell assembly 3, so that the end face of the male plug 1 is isolated from water. The second sealing baffle assembly 6 is in the state of sealing the internal cavity of the end cover shell 4, so that the end face of the female plug 2 is isolated from water. The rotating ring portion 71 at one end of the male plug 1 and the first convex ring 41 at one end of the female plug 2 are connected and installed by screwing. The specific operation process is to insert one end of a rod-shaped tool into the groove 76 outside the second convex ring 72, and the tool drives the second convex ring 72 to rotate. The rotating second convex ring 72 is screwed and connected with the first convex ring 41. At this time, the first sealing baffle assembly 5, the second sealing baffle assembly 6, the rotating connection assembly 7 and the first convex ring 41 form a docking cavity filled with water. When the end of the first convex ring 41 is gradually inserted into the second convex ring 72, the cavity is compressed, the water inside is pressurized, and the over-pressure water is discharged outward through the drainage hole 73 on the rotating ring part 71 through the water outlet pipe 74 and the second one-way valve 75 until the first convex ring 41 and the second convex ring 72 are screwed together. A certain distance margin is left between the end face of the male plug 1 and the first sealing barrier assembly 5, pushing the male plug 1 to move toward the first sealing barrier assembly 5, that is, the corrugated shell 32 is compressed while the male plug 1 moves, and the over-pressure air inside the corrugated shell 32 enters the cavity containing water through the air outlet pipe 55 and the first one-way valve 56. Since the rotating ring part 71 is a lubricated rotating structure, in the horizontally plugged connector, under the action of the counterweight assembly 8, the counterweight assembly 8 is always at the bottom of the rotating ring part 71, which also makes the drainage hole 73 in the rotating ring part 71 always at the bottom position. After the compressed air in the bellows casing 32 enters the cavity through the air outlet pipe 55, the air pre-occupies the upper position inside the cavity, and the water inside the cavity is discharged from the drainage hole 73 and the water outlet pipe 74 at the bottom until the bubbles are discharged from the water outlet pipe 74, and the male plug 1 and the bellows casing 32 are stopped from being pushed. At this time, the water inside the cavity has been completely discharged, and the first sealing barrier assembly 5 and the second sealing barrier assembly 6 are lifted up to open the sealing end surface of the limit shell 33 and the end cover shell 4, and the male plug 1 is continued to be pushed until it is inserted into the female plug 2 to complete the docking.

[0044] When unplugging the male plug 1 and the female plug 2, unplug the male plug 1 and the female plug 2 in advance, put down the first sealing barrier assembly 5 and the second sealing barrier assembly 6 to seal the limit housing 33 and the end cover housing 4 respectively. Finally, rotate the second convex ring 72 to separate it from the first convex ring 41. The underwater wet plug connector with auxiliary structure can smoothly complete the wet plugging of the male plug 1 and the female plug 2 in the diving area, and improve the speed and efficiency of cable construction and subsequent maintenance.

[0045] In the process of plugging and unplugging, in order to more clearly see the plugging and unplugging operations of the male plug 1 and the female plug 2, the end cover 4 is preferably made of a transparent material.

[0046] In the above specific implementation, please refer to Figure 2 and Figure 5 The first sealing baffle assembly 5 and the second sealing baffle assembly 6 have the same structural specifications. The first sealing baffle assembly 5 includes a baffle 51, a top shell 52 and an adjusting bolt 53. The top shell 52 is fixed to the top of the limiting shell 33. An inner cavity 54 is provided inside the top shell 52. A through hole 35 communicating with the inner cavity 54 is provided at the top of the limiting shell 33. The adjusting bolt 53 is threaded through the top wall of the top shell 52, and the bottom end of the adjusting bolt 53 is rotatably connected to the baffle 51. The baffle 51 can be made of a composite sheet with good hardness and sealing. The bottom wall and both sides of the end cover shell 4 are provided with slots 34 that match the baffle 51.

[0047] The lifting and unsealing of the first sealing barrier assembly 5 and the lowering and sealing of the second sealing barrier assembly 6 are based on the same principle. The adjusting bolt 53 is rotated to drive the partition 51 to move in the vertical direction. When the partition 51 moves to the inner cavity 54, the cavities of the outer shells of the male plug 1 and the female plug 2 are in a connected state. When the partition 51 moves to the inside of the slot 34, the cavities inside one side of the male plug 1 and the cavities inside one side of the female plug 2 are both in an isolated state.

[0048] Further, the air outlet pipe 55 penetrates the partition plate 51 in the first sealing baffle assembly 5. The air outlet pipe 55 is arranged near the lower position of the end surface of the partition plate 51 in the first sealing baffle assembly 5. When the partition plate 51 moves upward, the air outlet pipe 55 will never contact the inner top wall of the rotating ring portion 71 when moving upward.

[0049] Specifically, a sealing portion 36 is provided between the end cover 4 and the female plug 2 and between the back plate 31 and the male plug 1. The sealing portion 36 can adopt a sealing structure, such as a common sealing ring combined with a sealant for sealing, or a mechanical sealing structure with a better sealing effect.

[0050] For specific settings, see Figure 6-Figure 9 The rotating ring portion 71 includes an inner ring 711 and a side ring 712. The two side rings 712 are respectively fixed to the end faces of the second convex ring 72 and the limiting shell 33. The inner ring 711 is rotatably arranged between the two side rings 712, and the drainage hole 73 is arranged at a radial position of the inner ring 711. Balls 715 distributed in an annular array are rollingly arranged on both end faces of the inner ring 711, and a ring groove 714 matching the ball 715 is arranged on the side of the side ring 712 close to the inner ring 711.

[0051] The two groups of side rings 712 in the rotating ring part 71 and the second convex ring 72 and the limiting shell 33 can be respectively welded. The ball 715 cooperates with the annular groove 714 on the end surface of the side ring 712 to reduce the friction between the inner ring 711 and the side ring 712. When the horizontal position connector is plugged in, under the counterweight of the counterweight assembly 8, the drainage hole 73 on the inner ring 711 is easier to rotate and fall to the lowest position for drainage, that is, the water inside the cavity formed by the first convex ring 41, the first sealing baffle assembly 5, the second sealing baffle assembly 6 and the rotating connection assembly 7 is easier to be drained.

[0052] Furthermore, the rotating connection assembly 7 further includes a first sealing ring 717, which is arranged at the inner ring 711 and the side ring 712 in contact with each other near the inner wall. The rotating connection assembly 7 further includes a second sealing ring 718, which is arranged at the inner ring 711 and the side ring 712 in contact with each other near the outer wall. The inner ring 711 and the side ring 712 are respectively provided with limiting grooves of annular structures cooperating with the first sealing ring 717 and the second sealing ring 718.

[0053] The first sealing ring 717 and the second sealing ring 718 ensure good sealing between the inner ring 711 and the side ring 712 during the rotation, so that external water is not easy to enter the interior of the entire shell.

[0054] The ball bearing 715 in the underwater wet plug connector with auxiliary structure can be pre-lubricated with lubricating oil, and the lubricating rotation effect between the inner ring 711 and the side ring 712 will decrease in the later stage, affecting the lubricating rotation effect between the inner ring 711 and the side ring 712.

[0055] In the above specific implementation, please refer to Figure 5 , Figure 6 , Fig.10 and Fig.11 The counterweight assembly 8 includes a shell seat 81, a piston 84, a nut 85 and a push bolt 86. The shell seat 81 is fixed to the outside of the inner ring 711, and a mounting groove 83 matching the water outlet pipe 74 is provided on the shell seat 81. An oil storage chamber is provided inside the shell seat 81, and the piston 84 is slidably arranged at the bottom end of the oil storage chamber. The nut 85 is fixed to the bottom of the shell seat 81, and the nut 85 and the shell seat 81 are directly fixed by welding. The push bolt 86 is threadedly matched with the nut 85, and the screw of the push bolt 86 is movable through the bottom wall of the shell seat 81 and is rotatably connected with the piston 84. Both sides of the top of the shell seat 81 are provided with oil outlet holes 82, the end surface of the inner ring 711 is provided with a groove 713, and the ball 715 is rollingly arranged inside the groove 713. The inner ring 711 is provided with an oil filling hole 716 connected with the groove 713 and the oil outlet hole 82.

[0056] The design is that the counterweight assembly 8 is not only a counterweight block in the connector, but also can provide lubricating oil, so that the ball 715 always keeps a lubricated state. The specific operating principle is: turn the push bolt 86, and push the piston 84 to move inside the shell seat 81 under the threaded cooperation of the nut 85 to squeeze the space inside the oil storage chamber, and the lubricating oil inside the oil storage chamber is squeezed upward and discharged from the oil outlet 82. The lubricating oil discharged from the oil outlet 82 enters the groove 713 and the annular groove 714 on the end face of the inner ring 711 through the oil filling hole 716 inside the inner ring 711, that is, the space formed by the groove 713 and the annular groove 714 is filled with lubricating oil, so that the ball 715 is always immersed in the lubricating oil, and has less friction when rolling, that is, there is less friction when the inner ring 711 and the side ring 712 rotate, and it also ensures that the inner ring 711 and the side ring 712 can always rotate lubricated. When the next maintenance operation is performed, the push bolt 86 is continuously rotated to push the piston 84 , and the piston 84 can continue to push the internal lubricating oil into the groove 713 , so that the ball 715 always maintains a good lubrication effect.

[0057] The mounting groove 83 is used to mount and support the water outlet pipe 74 .

[0058] Specifically, the first sealing ring 717 and the second sealing ring 718 are respectively arranged at the inner bottom wall and the inner top wall near the end wall inside the groove 713. When the space inside the groove 713 and the side ring 712 is filled with lubricating oil, the lubricating oil inside the space of the groove 713 and the ring groove 714 is in a positive pressure state. At this time, the positive pressure oil also squeezes the first sealing ring 717 and the second sealing ring 718 that can squeeze the side, so that the gap sealed by the first sealing ring 717 and the second sealing ring 718 is further blocked, and the sealing effect of the first sealing ring 717 and the second sealing ring 718 is further improved.

[0059] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0060] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An underwater wet-plug connector with an auxiliary structure, characterized in that: include: A male plug (1), a female plug (2), a telescopic shell assembly (3), an end cover (4), a first sealing baffle assembly (5), a second sealing baffle assembly (6) and a rotating connection assembly (7), wherein the end cover (4) is sleeved on the outside of the female plug (2), and a first convex ring (41) is provided at the port of the end cover (4), and the second sealing baffle assembly (6) is mounted on the end cover (4) to block the inner end surface of the sealing end cover (4); The telescopic shell assembly (3) comprises a back plate (31), a corrugated shell (32) and a limit shell (33); the back plate (31) is sleeved on the outside of the male plug (1), and the two ends of the corrugated shell (32) are respectively connected to the back plate (31) and the limit shell (33); the first sealing baffle assembly (5) is mounted on the limit shell (33) to disassemble the inner end surface of the sealing limit shell (33); an air outlet pipe (55) is arranged on the movable end surface of the first sealing baffle assembly (5); and a first one-way valve (56) is arranged outside the air outlet pipe (55); The rotating connection assembly (7) comprises a rotating ring portion (71) and a second convex ring (72); the rotating ring portion (71) is rotatably connected to the limit housing (33) and the second convex ring (72); the second convex ring (72) and the rotating ring portion (71) are threadedly detachably arranged; a drainage hole (73) is radially arranged on the rotating ring portion (71); a water outlet pipe (74) is arranged outside the drainage hole (73); a second one-way valve (75) is arranged on the water outlet pipe (74); a counterweight assembly (8) connected to the rotating ring portion (71) is arranged outside the water outlet pipe (74); and a slot hole (76) is opened outside the second convex ring (72).

2. An underwater wet-plug connector with an auxiliary structure according to claim 1, characterized in that: The first sealing baffle assembly (5) and the second sealing baffle assembly (6) have the same structural specifications. The first sealing baffle assembly (5) comprises a baffle (51), a top shell (52) and an adjusting bolt (53). The top shell (52) is fixed to the top of the limiting shell (33). An inner cavity (54) is provided inside the top shell (52). A through hole (35) communicating with the inner cavity (54) is provided at the top of the limiting shell (33). The adjusting bolt (53) is threadedly connected to the top wall of the top shell (52), and the bottom end of the adjusting bolt (53) is rotatably connected to the baffle (51).

3. An underwater wet-plug connector with an auxiliary structure according to claim 2, characterized in that: The bottom wall and both sides of the end cover shell (4) are provided with slots (34) that match the partition plate (51).

4. The underwater wet-plug connector with auxiliary structure according to claim 3, characterized in that: The air outlet pipe (55) passes through the partition plate (51) in the first sealing baffle assembly (5).

5. The underwater wet-plug connector with auxiliary structure according to claim 1, characterized in that: A sealing portion (36) is provided between the end cover (4) and the female plug (2), and between the back plate (31) and the male plug (1).

6. The underwater wet-plug connector with auxiliary structure according to claim 1, characterized in that: The rotating ring portion (71) comprises an inner ring (711) and side rings (712), the two side rings (712) being respectively fixed to the end surfaces opposite to the second convex ring (72) and the limiting shell (33), the inner ring (711) being rotatably arranged between the two side rings (712), and the drainage hole (73) being arranged at a radial position of the inner ring (711).

7. An underwater wet-plug connector with an auxiliary structure according to claim 6, characterized in that: Both end surfaces of the inner ring (711) are provided with rolling balls (715) distributed in a ring-shaped array, and a ring groove (714) matching with the balls (715) is provided on a side of the side ring (712) close to the inner ring (711).

8. An underwater wet-plug connector with an auxiliary structure according to claim 7, characterized in that: The rotating connection assembly (7) further comprises a first sealing ring (717), wherein the first sealing ring (717) is arranged at a position where the inner ring (711) and the side ring (712) are in contact with each other and close to the inner wall.

9. An underwater wet-plug connector with an auxiliary structure according to claim 8, characterized in that: The rotating connection assembly (7) further comprises a second sealing ring (718), wherein the second sealing ring (718) is arranged at a position where the inner ring (711) and the side ring (712) are in contact with each other and close to the outer wall.

10. An underwater wet-plug connector with an auxiliary structure according to claim 9, characterized in that: The places where the inner ring (711) and the side ring (712) are in contact with each other are respectively provided with limiting grooves of annular structures matching with the first sealing ring (717) and the second sealing ring (718).

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