Underwater wet plugging connector convenient for oil injection

Abstract

The utility model provides an underwater wet plugging connector convenient for oil injection, which comprises a plug assembly and a socket assembly which can be plugged with each other, the socket assembly comprises a cylindrical socket shell and a second insulating base arranged in the socket shell, the second insulating base is internally provided with a second oil cavity, and the second oil cavity is internally provided with a second oil outlet. A screw mounting hole is formed in the rear end face of the second insulating base in the axial direction, a guide screw is mounted in the screw mounting hole, the screw mounting hole is communicated with the interior of the second oil cavity, and the guide screw and the screw mounting hole are sealed through a sealing gasket. The installation hole of the guide screw is used as the oil injection hole, multiplexing of structural functions is achieved, on the premise that the oil injection hole is not additionally formed, the requirements for guiding, rotation prevention and the like are met, the problem of an oil injection channel is solved, the structure of the connector is more concise and efficient, and the design and manufacturing cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of connectors, and in particular to an underwater wet-plug connector that is convenient for oil injection. Background Art

[0002] The description in this section merely provides background information related to the present disclosure and may not constitute prior art.

[0003] As the link connecting underwater equipment, underwater connectors have become irreplaceable core components in large-scale marine engineering applications such as seabed observation networks, marine resource development, national defense and military, salvage and rescue, and deep-sea scientific research platforms. Due to the harsh deep-sea environment and the complex nature of underwater facilities, repairs after damage are difficult, with long repair cycles and high losses. Given the unique characteristics of the deep-sea working environment, underwater connectors must provide reliable sealing, corrosion resistance, and dynamic pressure compensation—all key challenges that existing technologies need to address.

[0004] It should be noted that the above technical background is merely provided to provide a clear and complete description of the technical solutions of the present invention and to facilitate understanding by those skilled in the art. Simply because these solutions are described in the technical background section of the present invention, it should not be assumed that the above technical solutions are well known to those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an underwater wet-plug connector which is convenient for oil filling.

[0006] In order to solve the above technical problems, the present application provides an underwater connector that is convenient for oil filling, including a plug assembly and a socket assembly that can be plugged into each other, the plug assembly including a cylindrical plug shell, a first insulating base arranged in the plug shell), the front end face of the first insulating base (12) having at least one first mounting groove, the socket assembly including a cylindrical socket shell, a second insulating base arranged in the socket shell, the second insulating base being able to move forward along the socket shell under the action of an external force, the rear end face of the second insulating base having at least one second mounting groove, the first mounting groove and the second mounting groove both being installed with cylindrical roller seals, the first mounting groove The roller seal in the groove is arranged corresponding to the roller seal in the second mounting groove. The rear end face of the second insulating base is provided with a screw mounting hole in the axial direction, and a guide screw is installed in the screw mounting hole. The first insulating base is provided with a screw limiting groove that matches the guide screw. When the plug assembly and the socket assembly are docked, the roller seal in the first mounting groove and the roller seal in the corresponding second mounting groove are squeezed against each other to form a sealing surface. The guide screw is inserted into the screw limiting groove. The second insulating base has a second oil chamber, and the screw mounting hole is connected to the inside of the second oil chamber. The guide screw and the screw mounting hole are sealed by a sealing gasket.

[0007] Preferably, the second insulating base is further provided with an oil filling hole along the axial direction, and the screw mounting hole is connected to the second oil chamber through the oil filling hole.

[0008] Preferably, the inner diameter of the screw mounting hole is larger than the inner diameter of the oil filling hole, and a step surface capable of supporting the guide screw is formed at the bottom of the screw mounting hole.

[0009] Preferably, the second insulating base includes a base block and a cylindrical base wall located on the front side of the base block. A sealing plate is installed at the front end of the base wall, and the sealing plate seals the front end of the base wall to form the second oil chamber in the space defined by the base wall and the sealing plate. The screw mounting hole is opened on the base block.

[0010] Preferably, the socket shell has a second end wall, the second insulating base is located on the rear side of the second end wall, and a socket cavity is formed between the second insulating base and the second end wall. The socket shell is provided with at least one second drainage hole at the position of the socket cavity, and the socket cavity is connected with the external environment through the second drainage hole. A compression spring is provided on the outer wall of the base, and the rear end of the compression spring acts on the front end surface of the base block, and the front end of the compression spring acts on the second end wall. The second insulating base can overcome the elastic force of the compression spring and move forward along the socket shell under the action of external force. At least one second pressure compensation bag is provided at the rear end of the sealing plate, and the outer wall of the second pressure compensation bag is located in the second oil cavity. A bag cavity is formed in the second pressure compensation bag, and the bag cavity is connected with the socket cavity through the channel on the sealing plate. The second pressure compensation bag is used to balance the pressure inside and outside the second oil cavity when the pressure in the second oil cavity changes.

[0011] Preferably, when the guide screw is inserted to the bottom of the screw limiting groove, the maximum compression amount is reached between the roller seals of the plug assembly and the socket assembly.

[0012] Preferably, a plurality of first optical fiber assemblies are provided in the plug housing, a plurality of second mounting holes are opened in the axial direction of the first insulating base, the first optical fiber assembly can pass through the second mounting holes, the front end of the second mounting hole is located in the first mounting groove, a plurality of second optical fiber assemblies are provided in the socket housing, a plurality of fourth mounting holes are opened in the axial direction of the second insulating base, the second optical fiber assembly can pass through the fourth mounting hole, the rear end of the fourth mounting hole is located in the second mounting groove, the roller seal includes a roller and a sealing sleeve wrapped around the roller, the direction of the roller is perpendicular to the axial direction of the connector, the roller seal has at least one through hole opened in its own radial direction, the roller seal installed in the first mounting groove has a sealing position and an open position, when the roller seal is in the sealing position, the surface of the sealing sleeve seals the front end of the second mounting hole, when the roller seal is rotated to the open position, the through hole of the roller seal is parallel to the axial direction of the plug assembly, and the roller seal The through hole of the seal is connected and aligned one by one with the second mounting hole; the roller seal installed in the second mounting groove also has a sealing position and an open position. When the roller seal is in the sealing position, the surface of the sealing sleeve seals the rear end of the fourth mounting hole. When the roller seal is rotated to the open position, the through hole of the roller seal is parallel to the axial direction of the socket assembly, and the through hole of the roller seal is connected and aligned one by one with the fourth mounting hole. When the plug assembly and the socket assembly are not docked, the roller seals installed in the first mounting groove and the second mounting groove are both in the sealing position. After the plug assembly and the socket assembly are docked, the roller seals installed in the first mounting groove and the second mounting groove are both in the open position. The roller seal in the first mounting groove is connected and aligned one by one with the through hole of the roller seal in the corresponding second mounting groove. The corresponding second mounting holes, the through holes of the roller seal and the fourth mounting hole are aligned with each other and connected to each other to form an optical fiber docking channel extending along the axial direction. The end of the second optical fiber assembly passes through the optical fiber docking channel and docks with the first optical fiber assembly.

[0013] Preferably, the roller is equipped with a torsion spring and a protrusion, and the torsion spring is used to apply a restoring force to the roller seal so that the roller seal can return to the sealing position when the roller seal is subjected to external force and leaves the sealing position, and the protrusion is used to drive the roller seal to rotate along the roller when it is pushed by external force, and the first insulating base and the second insulating base are axially provided with relatively aligned channels, and the protrusion of the roller seal extends into the channel, and the socket assembly also includes a push rod assembly, the push rod assembly includes at least one push rod, the tail of the push rod is fixed on the second end wall, the push rod assembly also includes a mounting positioning plate, the side wall of the push rod is fixed on the mounting positioning plate, and the end of the push rod passes through the channel of the second insulating base. When the plug assembly and the socket assembly are docked, the second insulating base moves forward under the pressure of the first insulating base, and the end of the push rod extends into the channel of the first insulating base. During the movement of the push rod in the channel, the protrusion can be pushed to cause the roller seal to rotate.

[0014] Preferably, two roller seals are installed on the first insulating base, namely the first roller seal and the second roller seal. The first roller seal is provided with a plurality of first through holes parallel to each other along its own radial direction, and the second roller seal is provided with a plurality of second through holes parallel to each other along its own radial direction. Two roller seals are also installed on the second insulating base, namely the third roller seal and the fourth roller seal. The third roller seal is provided with a plurality of third through holes parallel to each other along its own radial direction, and the fourth roller seal is provided with a plurality of fourth through holes parallel to each other along its own radial direction. The first roller seal and the fourth roller seal are provided correspondingly, and the second roller seal and the third roller seal are provided correspondingly. When the plug assembly and the socket assembly are docked, The roller seals are all in the open position, the multiple first through holes of the first roller seal are respectively aligned one by one with the multiple fourth through holes of the fourth roller seal, the multiple second through holes of the second roller seal are respectively aligned one by one with the multiple third through holes of the third roller seal, the first insulating base is further provided with a first channel, a second channel and a third channel along the axial direction, the protrusions of the first roller seal and the second roller seal extend into the first channel, the second insulating base is further provided with a fourth channel, a fifth channel and a sixth channel along the axial direction, the protrusion of the third roller seal extends into the fifth channel, and the protrusion of the fourth roller seal extends into the sixth channel. When the plug assembly and the socket assembly are docked, the first channel is axially aligned with the fourth channel, the second channel is axially aligned with the fourth channel, and the The channel is axially aligned with the fifth channel, the third channel is axially aligned with the sixth channel, the push rod assembly includes three push rods, namely a first push rod, a second push rod and a third push rod arranged along the axial direction, the head of the first push rod passes through the fourth channel, the head of the second push rod passes through the fifth channel, and the head of the third push rod passes through the sixth channel. When the plug assembly and the socket assembly are docked, the first push rod extends from the fourth channel and enters the first channel, the second push rod extends from the fifth channel and enters the second channel, the third push rod extends from the sixth channel and enters the third channel, the first push rod is provided with a first notch and a second notch, the second push rod is provided with a third notch, and the head of the third push rod is provided with a fourth notch. During the process of plugging into the socket assembly, the first recess and the second recess are respectively used to move the protruding pieces of the first roller seal and the second roller seal, so that the first roller seal and the second roller seal are rotated from the sealing position to the open position; the third recess is used to move the protruding piece of the third roller seal, so that the third roller seal is rotated from the sealing position to the open position; the fourth recess is used to move the protruding piece of the fourth roller seal, so that the fourth roller seal is rotated from the sealing position to the open position; during the process of pulling the plug assembly out of the socket assembly, the first recess and the second recess are respectively used to move the protruding pieces of the first roller seal and the second roller seal, so that the first roller seal and the second roller seal are rotated from the open position to the sealing position;The third notch is used to move the protruding piece of the third roller seal to rotate the third roller seal from the open position to the sealed position; the fourth notch is used to move the protruding piece of the fourth roller seal to rotate the fourth roller seal from the open position to the sealed position.

[0015] Preferably, the plug housing includes a first end wall, a plug cavity is formed between the first insulating base and the first end wall, at least one first drainage hole is opened in the position of the plug cavity of the plug housing, the plug cavity is connected to the external environment through the first drainage hole, a first support plate and a second support plate are provided in the plug cavity, a first spring is installed between the first support plate and the second support plate, a first pressure compensation bag is further provided in the plug cavity, the first pressure compensation bag is arranged around the plug cavity, the two ends of the first spring respectively squeeze the first support plate and the second support plate, the first support plate and the second support plate respectively press the first pressure compensation bag against the front and rear end surfaces of the plug cavity, a closed first oil chamber is formed inside the first pressure compensation bag, the first end wall is axially opened with a plurality of first mounting holes, the plurality of second mounting holes correspond to the plurality of first mounting holes one by one and are aligned in the axial direction, the first optical fiber assembly passes through the first mounting hole and the first oil chamber in sequence from back to front, the front end of the first optical fiber assembly is located in the second mounting hole, the first optical fiber assembly includes a first optical fiber, a first optical fiber tube coated on the outer wall of the first optical fiber, and a first optical fiber tube coated on the first optical fiber. The first optical fiber sheath at the tail of the fiber tube and the first ceramic ferrule connected to the first optical fiber head, the tail end of the first ceramic ferrule is covered in the first optical fiber tube, the front outer wall of the first ceramic ferrule is covered with a ceramic sleeve, the side wall of the first optical fiber tube and the inner wall of the first mounting hole are sealed by a first optical fiber sealing ring, the rear side of the first end wall is also installed with a first back plate, the first optical fiber sheath is located on the rear side of the first back plate, the tail of the first optical fiber tube passes through the first back plate, and the first optical fiber tube is also sleeved with a reset spring, which is located at the first mounting hole. The first optical fiber tube is provided with a first end portion and a second end portion thereof is provided with a second end portion thereof. The first optical fiber tube is provided with a first end portion thereof and a second end portion thereof is provided with a second end portion thereof. The first optical fiber tube is provided with a first end portion thereof and a second end portion thereof is provided with a second end portion thereof. The first optical fiber tube is provided with a first end portion thereof and a second end portion thereof is provided with a second end portion thereof.

[0016] The second optical fiber assembly includes a second optical fiber, a second optical fiber tube covered on the outer wall of the second optical fiber, a second optical fiber sheath covered on the tail of the second optical fiber tube, and a second ceramic ferrule connected to the docking end of the second optical fiber. The outer wall of the second optical fiber tube and the wall of the third mounting hole are sealed by a second optical fiber sealing ring. When the plug assembly and the socket assembly are docked, the second ceramic ferrule of the second optical fiber assembly is inserted into the ceramic sleeve and docked with the first ceramic ferrule of the first optical fiber assembly.

[0017] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0018] The present invention provides an underwater wet-plug connector that facilitates oil filling. A guide screw is provided. The guide screw is used to cooperate with the screw limit slot of the plug assembly, playing a guiding role while also preventing the plug assembly and the socket assembly from rotating relative to each other. Furthermore, it can prevent the roller seal from being over-compressed due to excessive insertion force. The present application utilizes the mounting hole of the guide screw as an oil filling hole, achieving structural function reuse. Without adding additional oil filling holes, it not only meets the requirements of guidance and anti-rotation, but also solves the problem of the oil filling channel, making the connector structure more concise and efficient, and reducing design and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional structural diagram of the plug assembly of the present application.

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the connector of the present application when not plugged in.

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the connector of the present application when fully plugged in.

[0022] Figure 4 It is a structural diagram of the plug assembly of the present application.

[0023] Figure 5 It is a structural diagram of the socket assembly of this application.

[0024] Figure 6 yes Figure 2 A partial enlarged view of part A.

[0025] Figure 7 yes Figure 3 A partial enlarged view of part B.

[0026] Figure 8 yes Figure 3 A partial enlarged view of part C.

[0027] Figure 9 It is a schematic cross-sectional view of the socket housing and push rod assembly of the present application after installation.

[0028] Figure 10 It is a structural schematic diagram of the push rod assembly of the present application.

[0029] Figure 11 It is a structural diagram of the installation positioning plate of this application.

[0030] Figure 12 Schematic diagram of the push rod driven roller seal of the present application.

[0031] Figure 13 Schematic diagram of the push rod driven roller seal of the present application.

[0032] Figure 14 It is a partial cross-sectional structural diagram of the socket assembly of the present application.

[0033] Figure 15 yes Figure 14 A partial enlarged view of part D.

[0034] Wherein: 1. Plug housing; 11. First end wall; 12. First insulating base; 13. Plug cavity; 14. First drain hole; 15. First pressure compensation bladder; 16. First oil chamber; 17. First spring; 18. First mounting hole; 19. First back plate; 110. Slot; 111. First support plate; 112. Second support plate; 121. Screw retaining slot; 122. First channel; 123. Second channel; 124. Third channel; 125. Second mounting hole.

[0035] 21. First optical fiber sheath; 22. First optical fiber tube; 23. First optical fiber channel; 24. Return spring; 25. First optical fiber sealing ring; 26. Ceramic sleeve; 27. First ceramic ferrule;

[0036] 31. First roller seal; 311. First through hole; 32. Second roller seal; 321. Second through hole;

[0037] 41. Third roller seal; 411. Third through hole; 42. Fourth roller seal; 421. Fourth through hole;

[0038] 5. Socket housing; 51. Second end wall; 52. Second drainage hole; 53. Recess; 54. Socket cavity; 55. Second back plate; 511. Third mounting hole; 56. Groove;

[0039] 6. Second insulating base; 61. Guide screw; 62. Fourth mounting hole; 63. Base wall; 64. Second pressure compensation capsule; 65. Capsule cavity; 66. Second oil cavity; 67. Sealing plate; 68. Limit screw; 69. Elastic snap ring; 611. Oil filling hole; 612. Sealing gasket;

[0040] 7. Compression spring;

[0041] 81. Second optical fiber sheath; 82. Second optical fiber tube; 83. Second optical fiber channel; 84. Second optical fiber sealing ring; 85. Second ceramic ferrule;

[0042] 91. First push rod; 92. Second push rod; 93. Third push rod; 94. Mounting plate; 911. First screw; 912. Fourth screw; 913. First rod portion; 9131. First notch; 914. Second rod portion;

[0043] 921, second screw; 923, third notch; 931, third screw; 932, sixth screw; 933, fourth notch;

[0044] 941, first screw hole; 942, second screw hole. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] It should be noted that, in the description of the present invention, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0047] The connector of the present application includes a plug assembly and a socket assembly that can be plugged into each other. The front mentioned in the present application refers to the direction in which the plug assembly moves relative to the socket assembly during plugging, and the reverse is the rear. Figure 2 and 3 As shown, the receptacle assembly is located in front of the plug assembly.

[0048] like Figure 1 As shown, the plug assembly of the present application includes a plug housing 1, which is a cylindrical structure. The plug housing 1 includes a first end wall 11. A first insulating base 12 is installed in the plug housing 1. The first insulating base 12 is located on the front side of the first end wall 11, and the second insulating base 6 closes the front end opening of the plug housing 1.

[0049] A plug cavity 13 is formed between the first insulating base 12 and the first end wall 11 . The plug housing 1 is provided with at least one first drainage hole 14 at a position located in the plug cavity 13 . The plug cavity 13 is connected to the external environment through the first drainage hole 14 .

[0050] The plug cavity 13 is provided with a first support plate 111 and a second support plate 112. A first spring 17 is mounted between the first and second support plates 111, 112. A first pressure compensation sac 15 is also located within the plug cavity 13 and surrounds the plug cavity 13. The two ends of the first spring 17 respectively press against the first and second support plates 111, 112, pressing the first pressure compensation sac 15 against the front and rear end surfaces of the plug cavity 13. A sealed first oil chamber 16 is formed within the first pressure compensation sac 15.

[0051] The first end wall 11 is provided with a plurality of first mounting holes 18 along the axial direction, and the first insulating base 12 is provided with a plurality of second mounting holes 125 along the axial direction. The plurality of second mounting holes 125 correspond to the plurality of first mounting holes 18 one by one and are aligned in the axial direction.

[0052] The plug assembly further includes a plurality of first optical fiber assemblies, which pass through the first mounting hole 18 and the first oil cavity 16 in sequence from back to front, and the front end of the first optical fiber assembly is located in the second mounting hole 125.

[0053] The first optical fiber assembly includes a first optical fiber (not shown), a first optical fiber tube 22 covering the outer wall of the first optical fiber, a first optical fiber sheath 21 covering the rear end of the first optical fiber tube 22, and a first ceramic ferrule 27 connected to the head of the first optical fiber. The rear end of the first ceramic ferrule 27 is enclosed within the first optical fiber tube 22, and the front outer wall of the first ceramic ferrule 27 is covered with a ceramic sleeve 26. The side wall of the first optical fiber tube 22 is sealed to the inner wall of the first mounting hole 18 by a first optical fiber sealing ring 25.

[0054] A first back plate 19 is also installed on the rear side of the first end wall 11, the first optical fiber sheath 21 is located on the rear side of the first back plate 19, the tail of the first optical fiber tube 22 passes through the first back plate 19, and a return spring 24 is also sleeved on the first optical fiber tube 22. The return spring 24 is located in the first mounting hole 18, the front end of the return spring 24 acts on the raised portion of the outer wall of the first optical fiber tube 22, and the rear end acts on the first back plate 19. When the first optical fiber assembly is subjected to a backward force, it has a certain retreat space, and the return spring 24 can provide a rebound force to the first optical fiber tube 22 after being compressed.

[0055] The front end surface of the first insulating base 12 has at least one first mounting groove 56 , in which a cylindrical roller seal is installed. The front end portion of the second mounting hole 125 is located in the first mounting groove 56 .

[0056] The roller seal comprises a roller and a sealing sleeve covering the roller. The sealing sleeve may be made of rubber. The roller is oriented perpendicular to the axial direction of the plug assembly. The roller seal has multiple through-holes extending radially and arranged parallel to each other. A torsion spring is mounted on the roller. A protruding piece is also mounted on the roller.

[0057] The roller seal mounted in the first mounting groove 56 has a sealing position and an open position.

[0058] When the roller seal is in the sealing position, the surface of the sealing sleeve seals the front end of the second mounting hole 125. When the roller seal is rotated at an angle, it is in the open position. At this time, the through hole and the axial direction of the plug assembly are parallel to each other, and the through hole is aligned and connected to the second mounting hole 125.

[0059] In a preferred embodiment, when the roller seal is in the sealing position, the through hole and the axial direction of the plug assembly are perpendicular to each other. When the roller seal is rotated 90 degrees along its own axial direction, the roller seal is in the open position, at which point the through hole and the axial direction of the plug assembly are parallel to each other.

[0060] The torsion spring is used to apply a restoring force to the roller seal so as to enable the roller seal to return to the sealing position when the roller seal is subjected to an external force and leaves the sealing position.

[0061] like Figure 2 The figure shows a schematic diagram of the structure when the plug assembly and the socket assembly are not fully docked.

[0062] The socket assembly includes a socket housing 5, which is a cylindrical structure having a second end wall 51. A second insulating base 6 is mounted within the socket housing 5 and located behind the second end wall 51. A socket cavity 54 is formed between the second insulating base 6 and the second end wall 51. At least one second drainage hole 52 is defined in the socket housing 5 at a position within the socket cavity 54. The socket cavity 54 communicates with the external environment through the second drainage hole 52.

[0063] The second insulating base 6 includes a base block and a cylindrical base wall 63 located on the front side of the base block. The base wall 63 is covered with a compression spring 7. The rear end of the compression spring 7 acts on the front end surface of the base block, and the front end of the compression spring 7 acts on the second end wall 51.

[0064] The second insulating base 6 can overcome the elastic force of the compression spring 7 and move forward in the socket housing 5 under the action of external force.

[0065] A sealing plate 67 is installed at the front end of the base wall 63 . The sealing plate 67 seals the front end of the base wall 63 , forming a second oil chamber 66 in the space defined by the base wall 63 and the sealing plate 67 .

[0066] At least one second pressure-compensating bladder 64 is disposed at the rear end of the sealing plate 67. The outer wall of the second pressure-compensating bladder 64 is located within the second oil chamber 66. A bladder cavity 65 is formed within the second pressure-compensating bladder 64, which communicates with the socket cavity 54 through a hole in the sealing plate 67. When the pressure in the second oil chamber 66 changes, the second pressure-compensating bladder 64 balances the pressure inside and outside the second oil chamber 66.

[0067] The second end wall 51 is provided with a plurality of third mounting holes 511 along the axial direction, and the second insulating base 6 is provided with a plurality of fourth mounting holes 62 along the axial direction. The plurality of third mounting holes 511 correspond to the plurality of fourth mounting holes 62 one by one and are aligned in the axial direction.

[0068] The socket assembly also includes multiple second optical fiber assemblies, which pass through the third mounting hole 511 and the second oil chamber 66 from front to back in sequence, and the head of the second optical fiber assembly is located in the second oil chamber 66. In another embodiment, the head of the second optical fiber assembly can also be located in the fourth mounting hole 62.

[0069] The second optical fiber assembly includes a second optical fiber (not shown), a second optical fiber tube 82 covering the outer wall of the second optical fiber, a second optical fiber jacket 81 covering the end of the second optical fiber tube 82, and a second ceramic ferrule 85 connected to the mating end of the second optical fiber. A second optical fiber sealing ring 84 seals the outer wall of the second optical fiber tube 82 against the wall of the third mounting hole 511.

[0070] The rear end surface of the second insulating base 6 has at least one second mounting groove 56 , in which a cylindrical roller seal is installed. The rear end portion of the fourth mounting hole 62 is located in the second mounting groove 56 .

[0071] The roller seal mounted within the second mounting groove 56 also has a sealed position and an open position. When the roller seal is in the sealed position, the surface of the sealing sleeve seals the rear end of the fourth mounting hole 62. When the roller seal is rotated through an angle, it enters the open position. At this point, the through hole and the axial direction of the socket assembly are parallel to each other, and the through hole is aligned and connected to the fourth mounting hole 62.

[0072] In a preferred embodiment, when the roller seal is in the sealing position, the through hole and the axial direction of the socket assembly are perpendicular to each other. When the roller seal is rotated 90 degrees along its own axial direction, the roller seal is in the open position, at which point the through hole and the axial direction of the socket assembly are parallel to each other.

[0073] like Figure 1-2 As shown in FIG4 , two roller seals are installed on the first insulating base 12 , namely a first roller seal 31 and a second roller seal 32 .

[0074] The first insulating base 12 is further provided with a first channel 122 , a second channel 123 and a third channel 124 along the axial direction. The protrusions of the first roller seal 31 and the second roller seal 32 extend into the first channel 122 .

[0075] like Figure 2 As shown in FIG5 , two roller seals are also installed on the second insulating base 6 , namely a third roller seal 41 and a fourth roller seal 42 .

[0076] When the plug assembly and the socket assembly are docked, the first roller seal 31 docks with the fourth roller seal 42 , and the second roller seal 32 docks with the third roller seal 41 .

[0077] When the four roller seals are in the open position, the first through holes 311 of the first roller seal 31 are axially aligned with the fourth through holes 421 of the fourth roller seal 42. The second through holes 321 of the second roller seal 32 are axially aligned with the third through holes 411 of the third roller seal 41.

[0078] The second insulating base 6 further defines a fourth channel, a fifth channel, and a sixth channel along the axial direction. The tab of the third roller seal 41 extends into the fifth channel, and the tab of the fourth roller seal 42 extends into the sixth channel. When the plug assembly and the receptacle assembly are mated, the first channel 122 is axially aligned with the fourth channel, the second channel 123 is axially aligned with the fifth channel, and the third channel 124 is axially aligned with the sixth channel.

[0079] like Figure 9 and 10As shown, the socket assembly further includes a push rod assembly, which includes a first push rod 91, a second push rod 92, and a third push rod 93 arranged along the axial direction. The head of the first push rod 91 passes through the fourth channel, the head of the second push rod 92 passes through the fifth channel, and the head of the third push rod 93 passes through the sixth channel.

[0080] The tails of the first push rod 91 , the second push rod 92 and the third push rod 93 are fixed to the second end wall 51 by a first screw 911 , a second screw 921 and a third screw 931 , respectively.

[0081] The push rod assembly also includes an installation positioning plate 94, and the side walls of the tails of the first push rod 91, the second push rod 92 and the third push rod 93 are fixedly connected to the side of the installation positioning plate 94 by a fourth screw 912, a fifth screw (not shown in the figure) and a sixth screw 932 respectively.

[0082] Specifically, if Figure 10 and 11 As shown, the first push rod 91, the second push rod 92 and the third push rod 93 are arranged in a T-shape, and the mounting positioning plate 94 is T-shaped, having a transverse rod portion and a longitudinal rod portion perpendicular to the transverse rod portion, and the left and right side edges of the transverse rod portion are fixedly connected to the tail side walls of the second push rod 92 and the third push rod 93 respectively, and the end side edges of the longitudinal rod portion are fixedly connected to the tail side wall of the first push rod 91.

[0083] When the first push rod 91 , the second push rod 92 and the third push rod 93 are installed on the second end wall 51 , the installation positioning plate 94 is in contact with the second end wall 51 .

[0084] Assuming the push rod is fixed to the second end wall 51 only by screws, the push rod has only one fixing point. In this case, if the screw becomes loose, the push rod will easily rotate about its own axis, which will cause the push rod to malfunction. However, by adding a positioning plate 94 and fixing the side wall of the push rod to it, a lateral constraint is added to the push rod, preventing it from rotating about its own axis. This also reduces the shaking of the push rod and makes the push rod structure more stable.

[0085] In addition, the three push rods are arranged in a herringbone shape, and combined with the T-shaped mounting positioning plate 94, the three push rods can be more reasonably arranged in a relatively small range, effectively reducing the size of the entire connector and making the connector more compact.

[0086] like Figure 4 and 5As shown, the front end of the first insulating base 12 is provided with two screw retaining slots 121, and the rear end of the second insulating base 6 is provided with two guide screws 61 that mate with the screw retaining slots 121. When the plug assembly and the receptacle assembly are mated, the guide screws 61 are inserted into the corresponding screw retaining slots 121, providing guidance while also preventing the plug and receptacle assemblies from rotating relative to each other.

[0087] When the guide screw 61 is inserted to the bottom of the screw stop slot 121, the roller seals of the plug and receptacle assemblies reach maximum compression. By pre-designing the depth of the screw stop slot 121 and the length of the guide screw 61, the roller seal compression is controlled within an appropriate range during the actual insertion operation, preventing excessive compression of the roller seal due to excessive insertion force. If the roller seal is over-compressed, the material will deform excessively and lose its elasticity, which will affect the sealing effect and cause leakage. The guide screw 61's control of compression effectively prevents this situation.

[0088] like Figure 14 and 15 As shown, the rear end surface of the second insulating base 6 is provided with a screw mounting hole for mounting a guide screw 61, and the screw mounting hole is communicated with the interior of the second oil chamber 66. The guide screw 61 and the screw mounting hole are sealed by a sealing gasket 612.

[0089] The medium oil can be injected into the second oil chamber 66 through the screw installation hole. After the oil injection is completed, the guide screw 61 is installed into the screw installation hole, and the screw installation hole is sealed by the sealing gasket 612.

[0090] In a preferred embodiment, the second insulating base 3 is further provided with an oil filling hole 611 along the axial direction, and the screw mounting hole is communicated with the second oil chamber 66 through the oil filling hole 611 .

[0091] The inner diameter of the screw mounting hole is larger than the inner diameter of the oil filling hole 611 , and a step surface capable of supporting the guide screw 61 is formed at the bottom of the screw mounting hole.

[0092] The second insulating base 6 is also mounted with a resilient snap ring 69. The base of the resilient snap ring 69 is fixed to the outer wall of the second insulating base 6, and the free end of the resilient snap ring 69 extends toward the plug assembly. The outer wall of the front end of the plug housing 1 is circumferentially provided with a retaining groove 110. When the plug assembly and the receptacle assembly are mated, the plug housing 1 is inserted into the resilient snap ring 69, which then engages the retaining groove 110.

[0093] like Figure 2 and 3 As shown, the inner wall of the socket housing 5 is provided with a circle of grooves 56 along the circumference. When the socket assembly is in a non-plugged state, the groove 56 is located at a position corresponding to the free end of the elastic snap ring 69. When the plug housing 1 is inserted into the elastic snap ring 69, the groove 56 provides a space for the elastic snap ring 69 to spring outward, allowing the plug housing 1 to be smoothly inserted into the elastic snap ring 69. When the second insulating base 6 moves forward until the elastic snap ring 69 leaves the position where the groove 56 is located, the elastic snap ring 69 is held tightly by the inner wall of the socket housing and cannot spring outward. The free end of the elastic snap ring 69 cannot escape from the slot 110, and thus the plug housing 1 cannot escape from the elastic snap ring 69. At the same time, the relative positions of the plug assembly and the socket assembly in the axial direction are restricted, which determines the minimum compression between the roller seals and ensures the sealing effect between the roller seals.

[0094] A retaining screw 68 is mounted on the sidewall of the second insulating base 6. Accordingly, a clearance space 53 is provided on the socket housing 5. This clearance space 53 can be a strip-shaped slot in the socket housing 5, through which the retaining screw 68 passes. When the socket assembly is unmated, the retaining screw 68 is retained at the rearmost end of the slot, preventing the second insulating base 6 from moving further rearward and disengaging from the socket housing 5. During the connector mating process, the second insulating base 6 moves forward, and the strip-shaped slot provides a clearance space 53 for the retaining screw 68.

[0095] The working process of the connector of this application is as follows:

[0096] When the plug assembly and the socket assembly are plugged into each other,

[0097] The front end of the plug housing 1 is inserted into the elastic snap ring 69, and the elastic snap ring 69 is snapped open and then snapped into the slot 110 of the plug housing 1. During this process, the groove 56 on the inner wall of the socket housing 5 provides space for the free end of the elastic snap ring 69 to snap open outward.

[0098] As the plug assembly moves toward the receptacle assembly, the roller seals of the plug assembly and the receptacle assembly press against each other. Specifically, the first roller seal 31 of the plug assembly and the fourth roller seal 42 of the receptacle assembly are positioned opposite and press against each other; the second roller seal 32 of the plug assembly and the third roller seal 41 of the receptacle assembly are positioned opposite and press against each other. Simultaneously, the guide screw 61 is inserted into the bottom of the screw retaining slot 121. Under the pressure of the plug assembly, the second insulating base 6 moves forward, overcoming the elastic force of the compression spring 7.

[0099] During the forward movement of the second insulating base 6, the first push rod 91 extends from the fourth channel and enters the first channel 122. The second push rod 92 extends from the fifth channel and enters the second channel 123. The third push rod 93 extends from the sixth channel and enters the third channel 124.

[0100] The head of the first push rod 91 is provided with a first recess 9131 and a second recess (not shown in the figure). When the first push rod 91 moves in the first channel 122, the protrusions of the first roller seal 31 and the second roller seal 32 are respectively stuck in the first recess 9131 and the second recess. When the first push rod 91 further extends into the first channel 122, the protrusions of the first roller seal 31 and the second roller seal 32 are respectively moved by the first recess 9131 and the second recess. At this time, the first roller seal 31 and the second roller seal 32 rotate from the original sealing position to the open position.

[0101] A third recess 923 is provided at the head of the second push rod 92. When the second push rod 92 moves in the fifth channel, the protrusion of the third roller seal 41 is inserted into the third recess 923. When the second push rod 92 moves further, the protrusion of the third roller seal 41 is moved by the third recess 923. At this time, the third roller seal 41 rotates from the original sealing position to the open position.

[0102] A fourth recess 933 is provided at the head of the third push rod 93. When the third push rod 93 moves in the sixth channel, the protrusion of the fourth roller seal 42 is inserted into the fourth recess 933. When the third push rod 93 moves further, the protrusion of the fourth roller seal 42 is moved by the fourth recess 933. At this time, the fourth roller seal 42 rotates from the original sealing position to the open position.

[0103] like Figure 3 As shown, the first roller seal 31 and the fourth roller seal 42 are both in the open position. The first through hole 311 of the first roller seal 31, the fourth through hole 421 of the fourth roller seal 42, the second mounting hole 125 corresponding to the first through hole 311, and the fourth mounting hole 62 corresponding to the fourth through hole 421 are aligned and interconnected, forming an axially extending fiber mating channel. The second roller seal 32 and the third roller seal 41 are also in the open position. The second channel 123 of the second roller seal 32, the third through hole 411 of the third roller seal 41, the second mounting hole 125 corresponding to the second through hole 321, and the fourth mounting hole 62 corresponding to the third through hole 411 are aligned and interconnected, forming an axially extending fiber mating channel.

[0104] The end of the second optical fiber assembly passes through the fourth mounting hole 62 and the through hole of the roller seal in sequence, extends into the second mounting hole 125, and docks with the first optical fiber assembly located in the second mounting hole 125.

[0105] like Figure 8 As described above, the second ceramic ferrule 85 of the second optical fiber assembly is inserted into the ceramic sleeve 26 and docked with the first ceramic ferrule 27 of the first optical fiber assembly.

[0106] When the plug assembly and the socket assembly are separated, the plug assembly is pulled out of the socket housing 5 , and the second insulating base 6 moves backward under the drive of the plug assembly and the elastic force of the compression spring 7 .

[0107] As the second insulating base 6 moves backward, the second optical fiber assembly disengages from the through hole of the roller seal and retracts into the second oil chamber 66. The first push rod 91, the second push rod 92, and the third push rod 93 disengage from the first channel 122, the second channel 123, and the third channel 124, respectively, and retract into the fourth channel, the fifth channel, and the sixth channel.

[0108] During the process of the first push rod 91 withdrawing from the first channel 122, the protrusions of the first roller seal 31 and the second roller seal 32 are respectively stuck in the first recess 9131 and the second recess. As the first insulating base 12 retreats further, the first recess 9131 and the second recess respectively move the protrusions of the first roller seal 31 and the second roller seal 32, causing the first roller seal 31 and the second roller seal 32 to rotate from the open position to the sealed position, and re-seal the end of the second mounting hole 125.

[0109] When the second push rod 92 moves in the fifth channel, the protrusion of the third roller seal 41 is again stuck in the third recess 923. As the second push rod 92 moves further, the protrusion of the third roller seal 41 is pushed by the third recess 923. At this time, the third roller seal 41 rotates from the open position to the sealed position, and re-seals the end of the corresponding fourth mounting hole 62.

[0110] When the third push rod 93 moves in the sixth channel, the protrusion of the fourth roller seal 42 is again stuck in the fourth recess 933. As the third push rod 93 moves further, the protrusion of the fourth roller seal 42 is pushed by the fourth recess 933. At this time, the fourth roller seal 42 rotates from the open position to the sealed position, and re-seals the end of the corresponding fourth mounting hole 62.

[0111] When the second insulating base 6 returns to its original position, the free end of the elastic snap ring 69 is located at the position of the groove 56. When the plug assembly is pulled out, the elastic snap ring 69 pops outward and disengages from the slot 110 of the plug housing 1, thereby separating the plug assembly from the socket assembly.

[0112] The above embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. An underwater wet-plug connector that is convenient for oil filling, characterized in that: include, Plug assembly and socket assembly that can be plugged into each other, The plug assembly comprises a cylindrical plug housing (1), a first insulating base (12) arranged in the plug housing (1), and a front end surface of the first insulating base (12) having at least one first mounting groove. The socket assembly comprises a cylindrical socket housing (5) and a second insulating base (6) arranged in the socket housing (5). The second insulating base (6) can move forward along the socket housing (5) under the action of an external force. The rear end surface of the second insulating base (6) has at least one second mounting groove. The first installation groove and the second installation groove are both installed with cylindrical roller seals, and the roller seal in the first installation groove is arranged corresponding to the roller seal in the second installation groove. The rear end surface of the second insulating base is provided with a screw mounting hole along the axial direction, a guide screw is installed in the screw mounting hole, and the first insulating base (12) is provided with a screw limiting groove (121) that matches the guide screw (61). When the plug assembly and the socket assembly are docked, the roller seal in the first mounting groove and the roller seal in the corresponding second mounting groove are squeezed against each other to form a sealing surface, and the guide screw (61) is inserted into the screw limiting groove (121). The second insulating base (6) has a second oil chamber, the screw mounting hole is connected to the interior of the second oil chamber (66), and the guide screw (61) and the screw mounting hole are sealed by a sealing gasket (612).

2. The connector according to claim 1, wherein: The second insulating base (6) is further provided with an oil filling hole (611) along the axial direction, and the screw mounting hole is communicated with the second oil chamber (66) through the oil filling hole (611).

3. The connector according to claim 2, wherein: The inner diameter of the screw mounting hole is larger than the inner diameter of the oil filling hole (611), and a step surface capable of supporting the guide screw (61) is formed at the bottom of the screw mounting hole.

4. The connector according to claim 3, wherein: The second insulating base (6) includes a base block and a cylindrical base wall (63) located on the front side of the base block. A sealing plate (67) is installed at the front end of the base wall (63). The sealing plate (67) seals the front end of the base wall (63) to form the second oil chamber (66) in the space defined by the base wall (63) and the sealing plate (67). The screw mounting hole is opened on the base block.

5. The connector according to claim 4, wherein: The socket housing (5) has a second end wall (51), a second insulating base (6) is located on the rear side of the second end wall (51), and a socket cavity (54) is formed between the second insulating base (6) and the second end wall (51). The socket housing (5) is provided with at least one second drainage hole (52) at a position located in the socket cavity (54), and the socket cavity (54) is communicated with the external environment through the second drainage hole (52). The base wall (63) is provided with a compression spring (7) on its outer sleeve, the rear end of the compression spring (7) acts on the front end surface of the base block, and the front end of the compression spring (7) acts on the second end wall (51). Under the action of an external force, the second insulating base (6) can overcome the elastic force of the compression spring (7) and move forward along the socket housing (5). At least one second pressure compensation sac (64) is provided at the rear end of the sealing plate (67). The outer wall of the second pressure compensation sac (64) is located in the second oil chamber (66). A sac cavity (65) is formed in the second pressure compensation sac (64). The sac cavity (65) is connected to the socket cavity (54) through a hole on the sealing plate (67). The second pressure compensation sac (64) is used to balance the pressure inside and outside the second oil chamber (66) when the pressure in the second oil chamber (66) changes.

6. The connector according to claim 5, wherein: When the guide screw (61) is inserted to the bottom of the screw limiting groove (121), the maximum compression amount is achieved between the roller seals of the plug assembly and the socket assembly.

7. The connector according to claim 6, wherein: The plug housing (1) is provided with a plurality of first optical fiber assemblies, the first insulating base (12) is provided with a plurality of second mounting holes (125) along the axial direction, the first optical fiber assemblies can pass through the second mounting holes (125), and the front ends of the second mounting holes (125) are located in the first mounting groove. The socket housing (5) is provided with a plurality of second optical fiber assemblies, the second insulating base (6) is provided with a plurality of fourth mounting holes (62) along the axial direction, the second optical fiber assemblies can pass through the fourth mounting holes (62), and the rear end of the fourth mounting hole (62) is located in the second mounting groove. The roller seal comprises a roller and a sealing sleeve wrapped around the roller. The direction of the roller is perpendicular to the axial direction of the connector. The roller seal has at least one through hole opened along its radial direction. The roller seal installed in the first mounting groove has a sealing position and an open position. When the roller seal is in the sealing position, the surface of the sealing sleeve seals the front end of the second mounting hole (125). When the roller seal is rotated to the open position, the through hole of the roller seal and the axial direction of the plug assembly are parallel to each other, and the through hole of the roller seal is connected and aligned with the second mounting hole (125) one by one. The roller seal installed in the second mounting groove also has a sealing position and an open position. When the roller seal is in the sealing position, the surface of the sealing sleeve seals the rear end of the fourth mounting hole (62). When the roller seal is rotated to the open position, the through hole of the roller seal and the axial direction of the socket assembly are parallel to each other, and the through hole of the roller seal is connected and aligned with the fourth mounting hole (62). When the plug assembly and the socket assembly are not docked, the roller seals installed in the first mounting groove and the second mounting groove are both in the sealing position. When the plug assembly and the socket assembly are docked, the roller seals installed in the first mounting groove and the second mounting groove are both in the open position, the roller seal in the first mounting groove is connected and aligned with the through holes of the roller seal in the corresponding second mounting groove, the corresponding second mounting holes (125), the through holes of the roller seals and the fourth mounting hole (62) are aligned with each other and connected to each other to form an optical fiber docking channel extending in the axial direction, and the end of the second optical fiber assembly passes through the optical fiber docking channel and docks with the first optical fiber assembly.

8. The connector according to claim 7, wherein: The roller is equipped with a torsion spring and a convex piece. The torsion spring is used to apply a restoring force to the roller seal to enable the roller seal to return to the sealing position when the roller seal is subjected to an external force and leaves the sealing position. The convex piece is used to drive the roller seal to rotate along the roller when it is moved by an external force. The first insulating base (12) and the second insulating base (6) are provided with aligned channels along the axial direction, and the protruding piece of the roller seal extends into the channels. The socket assembly further comprises a push rod assembly, wherein the push rod assembly comprises at least one push rod. The tail of the push rod is fixed on the second end wall (51), and the push rod assembly further includes a mounting positioning plate (94). The side wall of the push rod is fixed on the mounting positioning plate (94), and the end of the push rod passes through the channel of the second insulating base (6). When the plug assembly and the socket assembly are docked, the second insulating base (6) moves forward under the pressure of the first insulating base (12), and the end of the push rod extends into the channel of the first insulating base (12). During the movement of the push rod in the channel, the protrusion can be moved to cause the roller seal to rotate.

9. The connector according to claim 8, wherein: Two roller seals are mounted on the first insulating base (12), namely a first roller seal (31) and a second roller seal (32). The first roller seal (31) is provided with a plurality of mutually parallel first through holes (311) along its radial direction. The second roller seal (32) is provided with a plurality of second through holes (321) parallel to each other along its radial direction. Two roller seals are also installed on the second insulating base (6), namely the third roller seal (41) and the fourth roller seal (42). The third roller seal (41) is provided with a plurality of third through holes (411) parallel to each other along its radial direction. The fourth roller seal (42) is provided with a plurality of mutually parallel fourth through holes (421) along its radial direction. The first roller seal (31) is arranged correspondingly to the fourth roller seal (42), and the second roller seal (32) is arranged correspondingly to the third roller seal (41). When the plug assembly and the socket assembly are docked, the roller seals are in the open position, the multiple first through holes (311) of the first roller seal (31) are aligned one by one with the multiple fourth through holes (421) of the fourth roller seal (42), and the multiple second through holes (321) of the second roller seal (32) are aligned one by one with the multiple third through holes (411) of the third roller seal (41). The first insulating base (12) is further provided with a first channel (122), a second channel (123) and a third channel (124) along the axial direction, and the protruding pieces of the first roller seal (31) and the second roller seal (32) extend into the first channel (122). The second insulating base (6) is further provided with a fourth channel, a fifth channel and a sixth channel along the axial direction, the protruding piece of the third roller seal (41) extends into the fifth channel, and the protruding piece of the fourth roller seal (42) extends into the sixth channel. When the plug assembly and the socket assembly are docked, the first channel (122) is axially aligned with the fourth channel, the second channel (123) is axially aligned with the fifth channel, and the third channel (124) is axially aligned with the sixth channel. The push rod assembly includes three push rods, namely a first push rod (91), a second push rod (92) and a third push rod (93) arranged along the axial direction. The head of the first push rod (91) passes through the fourth channel, the head of the second push rod (92) passes through the fifth channel, and the head of the third push rod (93) passes through the sixth channel. When the plug assembly and the socket assembly are docked, the first push rod (91) extends from the fourth channel and enters the first channel (122), the second push rod (92) extends from the fifth channel and enters the second channel (123), and the third push rod (93) extends from the sixth channel and enters the third channel (124). The first push rod (91) is provided with a first notch (9131) and a second notch, the second push rod (92) is provided with a third notch (923), and the head of the third push rod (93) is provided with a fourth notch (933). During the process of plugging the plug assembly into the socket assembly, the first recess (9131) and the second recess are used to respectively move the protruding pieces of the first roller seal (31) and the second roller seal (32), so that the first roller seal (31) and the second roller seal (32) are rotated from the sealing position to the open position; the third recess (923) is used to move the protruding piece of the third roller seal (41), so that the third roller seal (41) is rotated from the sealing position to the open position; the fourth recess (933) is used to move the protruding piece of the fourth roller seal (42), so that the fourth roller seal (42) is rotated from the sealing position to the open position; During the process of pulling the plug assembly out of the socket assembly, the first recess (9131) and the second recess are respectively used to move the protrusions of the first roller seal (31) and the second roller seal (32), so that the first roller seal (31) and the second roller seal (32) are rotated from the open position to the sealed position; the third recess (923) is used to move the protrusion of the third roller seal (41), so that the third roller seal (41) is rotated from the open position to the sealed position; the fourth recess (933) is used to move the protrusion of the fourth roller seal (42), so that the fourth roller seal (42) is rotated from the open position to the sealed position.

10. The connector according to claim 9, wherein: The plug housing (1) comprises a first end wall (11), a plug cavity (13) is formed between a first insulating base (12) and the first end wall (11), and at least one first drainage hole (14) is provided in the plug housing (1) at a position located in the plug cavity (13), and the plug cavity (13) is communicated with the external environment through the first drainage hole (14). A first support plate (111) and a second support plate (112) are provided in the plug cavity (13), a first spring (17) is installed between the first support plate (111) and the second support plate (112), a first pressure compensation bag (15) is also provided in the plug cavity (13), the first pressure compensation bag (15) is arranged around the plug cavity (13), the two ends of the first spring (17) respectively squeeze the first support plate (111) and the second support plate (112), the first support plate (111) and the second support plate (112) respectively press the first pressure compensation bag (15) against the front and rear end surfaces of the plug cavity (13), and a closed first oil chamber (16) is formed inside the first pressure compensation bag (15). The first end wall (11) is provided with a plurality of first mounting holes (18) along the axial direction, the plurality of second mounting holes (125) correspond to the plurality of first mounting holes (18) one by one and are aligned in the axial direction, the first optical fiber assembly passes through the first mounting holes (18) and the first oil chamber (16) in sequence from back to front, and the front end of the first optical fiber assembly is located in the second mounting hole (125). The first optical fiber assembly comprises a first optical fiber, a first optical fiber tube (22) coated on the outer wall of the first optical fiber, a first optical fiber sheath (21) coated on the tail of the first optical fiber tube (22), and a first ceramic ferrule (27) connected to the head of the first optical fiber, the tail end of the first ceramic ferrule (27) is coated in the first optical fiber tube (22), the front outer wall of the first ceramic ferrule (27) is coated with a ceramic sleeve (26), and the side wall of the first optical fiber tube (22) and the inner wall of the first mounting hole (18) are sealed by a first optical fiber sealing ring (25). A first back plate (19) is also installed on the rear side of the first end wall (11), the first optical fiber sheath (21) is located on the rear side of the first back plate (19), the tail of the first optical fiber tube (22) passes through the first back plate (19), and a return spring (24) is also sleeved on the first optical fiber tube (22). The return spring (24) is located in the first mounting hole (18), the front end of the return spring (24) acts on the raised portion of the outer wall of the first optical fiber tube (22), and the rear end acts on the first back plate (19). When the first optical fiber assembly is moved backward by an external force, the return spring (24) can provide a rebound force to the first optical fiber tube (22). The second end wall (51) is provided with a plurality of third mounting holes (511) along the axial direction, and the second insulating base (6) is provided with a plurality of fourth mounting holes (62) along the axial direction. The plurality of third mounting holes (511) correspond to the plurality of fourth mounting holes (62) one by one and are aligned in the axial direction. The second optical fiber assembly passes through the third mounting hole (511) and the second oil cavity (66) in sequence from front to back, and the head of the second optical fiber assembly is located in the second oil cavity (66). The second optical fiber assembly includes a second optical fiber, a second optical fiber tube (82) coated on the outer wall of the second optical fiber, a second optical fiber sheath (81) coated on the tail of the second optical fiber tube (82), and a second ceramic ferrule (85) connected to the second optical fiber butt joint end. The outer wall of the second optical fiber tube (82) and the hole wall of the third mounting hole (511) are sealed by a second optical fiber sealing ring (84). When the plug assembly and the socket assembly are docked, the second ceramic ferrule (85) of the second optical fiber assembly is inserted into the ceramic sleeve (26) and docked with the first ceramic ferrule (27) of the first optical fiber assembly.

Images