Watertight plug, watertight socket and watertight connector assembly

Abstract

The utility model provides a watertight plug, a watertight socket and a watertight connector assembly, and relates to the technical field of connectors, the watertight connector assembly comprises a watertight plug and a watertight socket, the watertight plug comprises a plug housing, a plug pressing plate, a plug insulator and a plug contact, the plug contact comprises a jack part, a pressure spring, a wire spring, an insulating rod, a first radial seal and a first oil bag, the front end of the wire spring is provided with a conductive high-temperature-resistant anti-ablation front sleeve which is installed in the insertion cavity and can be in contact with the adaptive pin, and the conductive high-temperature-resistant anti-ablation front sleeve is electrically connected with the jack part. The watertight socket comprises a socket shell, a socket insulator and a contact pin, the socket insulator is fixed in the socket shell in a sealed mode, the contact pin is fixed in the socket insulator in a sealed mode, the contact pin is provided with a contact pin body formed by a conductive material, and a conductive high-temperature-resistant ablation-resistant contact head is installed at the front end of the contact pin body. The two ends of the oil bag are sealed and fixedly connected, and the structure is high in stability and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically to a watertight plug, a watertight socket, and a watertight connector assembly. Background Technology

[0002] Existing underwater pressurized plug-in and socket structures do not support live plugging and unplugging, which is prone to ablation. Existing live plugging and unplugging structures either only support live plugging and unplugging in air or cannot meet the requirements for stable live plugging and unplugging underwater. Patent application number 202211248544.0 discloses "An Underwater Plug-in Electrical Connector with a Dual Redundant Sealing Structure." The disclosed pins generate an electric arc under the influence of an electric field when plugged into a live connector. This arc easily ablates the pins and the live connector, leading to welding and damage to the connector. Furthermore, the disclosed first oil bladder seal is mounted on an insulating support and its tail end. The surface of the first oil bladder seal mounting position forms a seal with other contacting surfaces through circumferential compression. There are no other structures between them, resulting in a small sealing contact area and low sealing reliability. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a watertight plug, a watertight socket, and a watertight connector assembly, which can realize underwater live plugging and unplugging, and the oil bladder end sealing and fixed connection structure has strong stability and long service life.

[0004] To achieve the above technical objectives, the adopted technical solution is as follows: a watertight plug, comprising a plug housing, a plug pressure plate, a plug insulator, and at least one plug contact. The plug pressure plate and plug insulator are respectively sealed and fixed inside both ends of the plug housing. The two ends of the plug contact are respectively axially inserted into the plug pressure plate and plug insulator. The plug contact includes a socket component with a cavity, a compression spring, a wire spring, an insulating rod, a first radial seal, and a first oil bladder. The compression spring and wire spring are axially installed in the socket. The wire spring is located at the front end of the compression spring and electrically connected to the socket component. The front end of the insulating rod is dynamically sealed to the plug insulator via the first radial seal. In the insulator, the rear end of the insulating rod passes through the wire spring and contacts the compression spring. When the insulating rod is pushed, it can slide axially in the cavity in conjunction with the compression spring. The front end of the first oil bladder is squeezed and sealed between the front end of the plug insulator and the front end of the socket component. The rear end of the first oil bladder is squeezed and sealed between the rear end of the plug pressure plate and the rear end of the socket component. The socket component is provided with an opening for connecting the first oil bladder and the cavity. The first oil bladder, the socket component and the insulating rod form a first oil-filled cavity. The front end of the wire spring is provided with a conductive, high-temperature resistant and ablation-resistant front sleeve installed in the cavity and able to contact the adapter pin in the plug contact. The conductive, high-temperature resistant and ablation-resistant front sleeve is electrically connected to the socket component.

[0005] Beneficial effects: By adding a conductive, high-temperature resistant, and ablation-resistant front sleeve, which has the functions of high temperature resistance and arc erosion resistance, other components inside the plug contact can be protected from arc erosion when it is plugged into a watertight socket. Furthermore, the conductive, high-temperature resistant, and ablation-resistant front sleeve is located in insulating oil, which also has a certain arc-extinguishing effect, effectively reducing the occurrence of arcs.

[0006] Furthermore, the inner wall and / or outer wall of the first oil bladder located at the compression sealing position are provided with hook-and-loop protrusions and grooves on the contact surface to form a wave-shaped contact sealing surface.

[0007] Beneficial effects: The oil bladder structure resists external water pressure, allowing the inner cavity of the first oil bladder to connect with the inner cavity of the insertion component, thus immersing all components in silicone oil and reducing the effect of electric arc. The insulating rod installed at the front end achieves dynamic sealing through the first radial seal, ensuring that there is no oil leakage in the first oil-filled cavity. At the same time, the size of the sealing contact area between the first oil bladder compression sealing position and the contact surface is increased, improving the sealing reliability. Furthermore, the wavy contact surface increases friction and prevents the oil bladder from falling off.

[0008] Furthermore, the conductive, high-temperature resistant, and ablation-resistant front sleeve is a spring claw structure capable of elastically opening. The spring claw structure consists of a ring-shaped main body and elastic teeth arranged circumferentially around the ring-shaped main body. The elastic teeth can be inserted by a pin to expand and achieve elastic deformation.

[0009] Beneficial effects: The spring claw structure ensures the elastic installation of the conductive, high-temperature resistant, and ablation-resistant front sleeve. This allows the pin to slightly push open the sleeve during insertion, ensuring tight contact. When the pin is withdrawn, it springs back, preventing wear and tear on the non-deformable sleeve after repeated insertions and removals, which could lead to a loss of contact with the pin. The spring claw structure can also be fitted over the outer edge of the wire spring, minimizing the length of the plug contacts.

[0010] Furthermore, the outer surface of the annular body is provided with external threads for connection with the insertion hole component.

[0011] Beneficial effects: The use of external threads to install the conductive, high-temperature resistant, and ablation-resistant front sleeve is convenient and allows for quick and full contact with the socket components to achieve electrical connection, preventing the conductive, high-temperature resistant, and ablation-resistant front sleeve from shaking.

[0012] Furthermore, the front end of the insulating rod is provided with a keyway structure that mates with the front end of the adapter pin.

[0013] Beneficial effects: No human eye observation is required, making it easy to align the fitting pins and insulating rods and preventing them from shifting, thus facilitating the alignment and insertion between watertight plugs and watertight sockets.

[0014] Furthermore, the front end face of the insulating rod is not lower than the front end face of the plug insulator.

[0015] Beneficial effects: This structure prevents water from entering the space between the insulating rod and the pin during use, ensuring a sealing effect during underwater insertion and removal.

[0016] A watertight plug further includes a second oil bladder sleeved on the outside of all plug contacts, the front end of the second oil bladder being squeezed and sealed between the front end of the plug insulator and the front end of the plug housing, and the rear end of the second oil bladder being squeezed and sealed between the rear end of the plug pressure plate and the rear end of the plug housing.

[0017] Beneficial effects: By adding a second oil bladder, which serves as an external protection for the plug contacts, the sealing performance of the watertight plug can be further improved. Combined with the initial protection of the plug shell, it provides a double protection effect.

[0018] Furthermore, the inner wall and / or outer wall of the second oil bladder located at the compression sealing position are provided with hook-and-loop protrusions and grooves on the contact surface to form a wave-shaped contact sealing surface.

[0019] Beneficial effects: The sealing position of the second oil bladder improves the sealing stability through the matching protrusions and grooves, further enhancing the sealing performance of the entire water seal plug and making it less likely for the second oil bladder to slip during assembly.

[0020] A watertight socket, which mates with a watertight plug, includes a socket housing, a socket insulator, and a pin. The socket insulator is sealed and fixed inside the socket housing, and the pin is sealed and fixed in the socket insulator along the axial direction. The pin has a pin body formed of conductive material, and a conductive, high-temperature resistant, and ablation-resistant contact head is installed at the front end of the pin body. An insulating layer is covered in the middle of the pin body, and the surface of the pin body between the insulating layer and the conductive, high-temperature resistant, and ablation-resistant contact head is the contact surface.

[0021] Beneficial effects: The watertight socket features a sealed socket insulator and socket housing, ensuring that the seal at the rear end of the insulator does not come into contact with water. A conductive, high-temperature resistant, and ablation-resistant contact head is located at the front end of the pin body. This contact head engages with the conductive, high-temperature resistant, and ablation-resistant front sleeve of the watertight plug end during insertion, achieving high-temperature resistance and arc resistance, and preventing wire spring ablation caused by electric arcs.

[0022] Furthermore, the conductive, high-temperature resistant, and ablation-resistant contact head is installed at the front end of the pin body via friction welding or threaded connection.

[0023] Beneficial effects: Friction welding connects the conductive, high-temperature resistant, and ablation-resistant contact head to the pin body, which can improve the bonding force. Threaded connection connects the conductive, high-temperature resistant, and ablation-resistant contact head to the pin body, allowing for replacement when the contact head is damaged.

[0024] Furthermore, the front end of the conductive, high-temperature resistant, and ablation-resistant contact head is provided with a keyway structure that matches the front end of the adaptable insulating rod.

[0025] Beneficial effects: The matching keyway structure helps the pins and plug contacts align quickly.

[0026] Furthermore, the contact surface is coated with a wear-resistant layer.

[0027] Beneficial effects: The contact surface is coated with a conductive wear-resistant layer, which does not affect the conductive contact between the contact surface and the coil spring and the conductive, high-temperature resistant and ablation-resistant front sleeve, and can also improve the wear resistance and oxidation resistance of the contact surface.

[0028] Furthermore, the front end face of the insulation layer is not lower than the front end face of the socket insulator.

[0029] Beneficial effects: By setting an insulating layer on the surface of the socket insulator that is no lower than the front end face of the socket insulator, water is prevented from entering the socket from between the pins and the socket insulator, and the contact surface is reduced, thus reducing contact with water.

[0030] A watertight connector assembly includes a watertight plug and a watertight socket, wherein when the watertight plug and the watertight socket are engaged, the front end face of the plug insulator and the front end face of the socket insulator are fully engaged.

[0031] Beneficial effects: The combination of a highly sealed, rationally designed watertight plug and watertight socket enables live plugging and unplugging under high pressure in deep water conditions. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the plug and socket of this utility model in the plug-in state;

[0033] Figure 2 This is a schematic diagram of the plug contact and the pin of this utility model being inserted.

[0034] Figure 3 This is a schematic diagram of the pin insertion process of this utility model;

[0035] Figure 4 This is a schematic diagram of the plug contact component of the present invention, which features a conductive, high-temperature resistant, and ablation-resistant front sleeve.

[0036] Figure 5 This is a schematic diagram of the conductive, high-temperature resistant, and ablation-resistant front sleeve of this utility model;

[0037] Figure 6 This is a schematic diagram of the pin with conductive, high-temperature resistant, and ablation-resistant contact head of this utility model;

[0038] In the diagram: 1. Watertight plug, 102. Plug pressure plate, 103. Plug insulator, 104. Plug contact, 105. Second oil bladder, 106. Second oil filling chamber;

[0039] 1041, Insertion hole component; 1041-1, Insertion cavity; 1042, Compression spring; 1043, Wire spring; 1044, Insulating rod; 1045, First radial seal; 1046, First oil bladder; 1047, First oil-filled cavity; 1048, Wavy contact sealing surface; 1049, Conductive, high-temperature resistant, and ablation-resistant front sleeve; 10491, Annular body; 10492, Elastic teeth;

[0040] 2. Watertight socket, 201. Socket housing, 202. Socket insulator, 203. Pin;

[0041] 2031, Pin body; 2031-1, Contact surface; 2032, Conductive, high-temperature resistant, and ablation-resistant contact head; 2032-1, Keyway structure; 2033, Insulation layer. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0043] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0044] The structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0045] The terms "upper," "lower," "left," "right," "middle," "longitudinal," "lateral," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first" and "second" are used only to distinguish similar objects and should not be construed as indicating a specific order or sequence. It should be understood that such use can be interchanged where appropriate.

[0046] like Figure 1 As shown, a watertight plug includes a plug housing 101, a plug pressure plate 102, a plug insulator 103, and at least one plug contact 104. The plug housing 101 has the plug pressure plate 102 and the plug insulator 103 sealed and fixed inside its two ends, respectively. The two ends of the plug contact 104 are respectively inserted through the plug pressure plate 102 and the plug insulator 103 along the axial direction. The front end of the watertight plug 1 refers to the plug-in end that is inserted into the watertight socket 2.

[0047] like Figure 4 As shown, the plug contact 104 includes a socket component 1041 with a cavity 1041-1, a compression spring 1042, a wire spring 1043, an insulating rod 1044, a first radial seal 1045, and a first oil bladder 1046. The compression spring 1042 and the wire spring 1043 are axially mounted in the cavity 1041-1. The wire spring 1043 is disposed at the front end of the compression spring 1042 and is electrically connected to the socket component 1041. The middle part of the wire spring 1043 has a central hole for the insulating rod 1044 to pass through. The shape of the wire spring is not limited and is intended to contact the inserted pin 203. The front end of the insulating rod 1044 is dynamically sealed in the plug insulator 103 through the first radial seal 1045. The rear end of the insulating rod 1044 passes through the wire spring 1043 and contacts the compression spring 1042. When the insulating rod 1044 is pushed, it can slide axially in the insertion cavity 1041-1 in conjunction with the compression spring 1042. That is, when the pin 203 pushes the insulating rod 1044 backward, the compression spring 1042 is compressed. When the pin 203 is pulled out, the compression spring 1042 is released and pushes the insulating rod 1044 back into place. The front end of the first oil bladder 1046 is squeezed and sealed between the front end of the plug insulator 103 and the front end of the socket component 1041, and the rear end of the first oil bladder 1046 is squeezed and sealed between the plug pressure plate 102 and the rear end of the socket component 1041. The socket component 1041 is provided with an opening 1041-2 for connecting the first oil bladder 1046 and the socket cavity 1041-1. The first oil bladder 1046, the socket component 1041 and the insulating rod 1044 form a first oil filling cavity 1047.

[0048] like Figure 4As shown, the front end of the wire spring 1043 is provided with a conductive, high-temperature resistant, and ablation-resistant front sleeve 1049, which is installed in the insertion cavity 1041-1 and can contact the adapter pin 203 in the insertion plug contact 104. The conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 is electrically connected to the insertion hole component 1041, achieving the effects of high temperature resistance, arc resistance, and weld resistance. The conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 is integrally formed from a conductive, high-temperature resistant, and ablation-resistant material, or the conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 is formed by plating a conductive, high-temperature resistant, and ablation-resistant layer onto a metal body. The conductive, high-temperature resistant, and ablation-resistant material is a nickel-tungsten alloy or a copper-tungsten alloy. The conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 is annular in shape, and its inner wall is in insertion contact with the pin 203.

[0049] The inner and / or outer wall surfaces of the first oil bladder 1046 located at the compression sealing position are provided with hook-and-loop protrusions and grooves on the contact surfaces, forming a wavy contact sealing surface 1048. The wavy contact sealing surface 1048 is not limited to a V-shaped surface, S-shaped surface, VS mating surface, etc., such as... Figure 2 The wave-shaped contact sealing surface 1048 shown indicates that the inner wall of the first oil bladder 1046, located at the compression sealing position, has protrusions and grooves that hook and engage with the socket component 1041. The wave-shaped contact sealing surfaces 1048 at other positions are designed with reference to this structure. The wire spring 1043 and the conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 are encased in the first oil bladder 1046 and completely immersed in the insulating oil inside the first oil bladder 1046, providing a certain arc-extinguishing effect. The end of the first oil bladder 1046 is compressed and sealed by the plug pressure plate 102, the plug insulator 103, and the socket component 1041. Its inner wall surface is designed with grooves and protrusions, which hook with the protrusions and grooves on the outer wall surface of the socket to form a "wave-shaped" contact surface, greatly enhancing the sealing performance. This ensures that the internal oil does not leak out and that external seawater does not enter, while also avoiding the risk of the inner oil bladder slipping out during assembly.

[0050] like Figure 5 As shown, to enable the conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 to achieve elastic deformation and contact with the pin 203, the conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 is a spring claw structure that can elastically open. The spring claw structure consists of an annular body 10491 and elastic teeth 10492 arranged circumferentially around the annular body 10491. The elastic teeth 10492 can be inserted and opened by the pin 203 to achieve elastic deformation. The annular body 10491 can be fitted onto the outside of the coil spring 1043. Figure 5 The elastic tooth 10492 is L-shaped, but its specific structure is not limited to L-shape; it only needs to ensure that it can expand and deform. The outer circumferential surface of the annular body 10491 is provided with external threads for connection with the insertion hole component 1041, such as... Figure 2As shown in the enlarged view, the annular body 10491 is installed using external threads. During installation, to ensure the deformation of the L-shaped claw 10492, the annular body 10491 is fixed inside the insertion hole component 1041 via external threads. There is still a certain deformation space between the L-shaped claw 10492 and the insertion cavity wall. This threaded fixing method prevents the conductive high-temperature resistant and ablation-resistant front sleeve 1049 from shaking and also achieves sufficient contact with the insertion hole component for electrical connection. The inner diameter of this high-temperature resistant and ablation-resistant front sleeve 1049 is slightly smaller than the diameter of the pin 203. When the pin 203 is inserted, the conductive high-temperature resistant and ablation-resistant front sleeve 1049 is stretched open, achieving tight contact with the pin 203. To achieve deformation, the conductive high-temperature resistant and ablation-resistant front sleeve 1049 is formed from a conductive high-temperature resistant and ablation-resistant material with good elasticity, or from a metal material with good elasticity plated with a conductive high-temperature resistant and ablation-resistant material.

[0051] like Figure 4 As shown, the front end of the insulating rod 1044 is provided with a keyway structure 2032-1 that mates with the front end of the adapter pin 203, for the alignment and insertion of the insulating rod 1044 and the pin 203.

[0052] like Figure 1 As shown, the front end face of the insulating rod 1044 is not lower than the front end face of the plug insulator 103 to prevent water from entering the plug insulator 103 at the front end of the insulating rod 1044 when the pin is not inserted.

[0053] like Figure 1 As shown, a watertight plug further includes a second oil bladder 105 sleeved on the outside of all plug contacts 104. The front end of the second oil bladder 105 is squeezed and sealed between the front end of the plug insulator 103 and the front end of the plug housing 101, and the rear end of the second oil bladder 105 is squeezed and sealed between the rear end of the plug pressure plate 1202 and the rear end of the plug housing 101. The second oil bladder 105, the first oil bladder 1046, the plug pressure plate 102, and the plug insulator 103 form a second oil-filled cavity 106. The second oil-filled cavity 106 is filled with insulating oil, serving as an additional layer of protection for the outside of the plug contacts 104, further improving the sealing performance.

[0054] The inner and / or outer wall surfaces of the second oil bladder 105 located at the compression sealing position are provided with hook-and-loop protrusions and grooves on the contact surfaces, forming a wavy contact sealing surface 1048. The wavy contact sealing surface 1048 at this position is referenced to... Figure 4 The shape and structure within.

[0055] The watertight plug 1 is designed with inner and outer double-layer balanced oil bladders (first oil bladder 1046 and second oil bladder 105), which are made of rubber material and are filled with insulating oil (considered incompressible) to resist external seawater pressure and improve the insulation performance of the watertight plug.

[0056] like Figure 1 , Figure 2 As shown, a watertight socket 2, which mates with the watertight plug 1, includes a socket housing 201, a socket insulator 202, and pins 203. The front end of the watertight socket 2 is the insertion end for the watertight plug 1, and the other end of the watertight socket 2 is installed on the device in a sealed state. That is, both ends of the watertight socket 2 are waterproof and can be inserted and removed underwater. The socket housing 201 contains a sealed socket insulator 202, which can be installed via a second radial seal 204. At least one pin 203, arranged axially, is sealed within the socket insulator 202. The pin 203 is installed within the socket insulator 202 via a third radial seal 205. The pin 203 has a pin body 2031 formed of conductive material, such as copper or copper alloy. The front end of the pin body 2031 is equipped with a conductive, high-temperature resistant, and ablation-resistant contact head 2032. The conductive, high-temperature resistant, and ablation-resistant contact head 2032 can be made of copper-tungsten alloy or nickel-tungsten alloy, effectively resisting ablation caused by electric arc. It can exist alone or be used in conjunction with the conductive, high-temperature resistant, and ablation-resistant front sleeve 1049. The middle of the pin body 2031 is covered with an insulating layer 2033. The insulating layer is made of PEEK granules, etc., through injection molding, and further precision-machined to meet dimensional requirements. The front end face of the insulating layer 2033 is not lower than the front end face of the socket insulator 202 to prevent water from entering the socket insulator 201. The surface of the pin body 2031 between the insulating layer 2033 and the conductive, high-temperature resistant, and ablation-resistant contact head 2032 is the contact surface 2031-1, which is used to contact the wire spring 1043 and / or the conductive, high-temperature resistant, and ablation-resistant front sleeve 1049.

[0057] like Figure 6 As shown, the conductive, high-temperature resistant, and ablation-resistant contact head 2032 is installed at the front end of the pin body 2031 by friction welding or threaded connection. Friction welding results in high weld strength, fewer defects, stable quality, and high bonding force. Threaded connection allows for the replacement of the conductive, high-temperature resistant, and ablation-resistant contact head 2032.

[0058] The front end of the conductive, high-temperature resistant, and ablation-resistant contact head 2032 is provided with a keyway structure 2032-1 that mates with the front end of the adaptable insulating rod 1044. If the front end of the insulating rod 1044 is a groove structure, then the front end of the conductive, high-temperature resistant, and ablation-resistant contact head 2032 is provided with a matching convex key structure, such as... Figure 4 , Figure 6As shown, or if the front end of the insulating rod 1044 is a convex key structure, then the front end of the conductive, high-temperature resistant, and ablation-resistant contact head 2032 is provided with a matching concave key structure, as shown in the specific structural diagram. Figure 4 , Figure 6 .

[0059] The contact surface 2031-1 is coated with a wear-resistant layer, which has the function of wear resistance and oxidation resistance. The wear-resistant layer can be gold plated.

[0060] like Figure 1 As shown, a watertight connector assembly includes a watertight plug 1 and a watertight socket 2. When the watertight plug 1 and the watertight socket 2 are inserted into place, the front end face of the plug insulator 103 and the front end face of the socket insulator 202 are completely in contact, preventing water from entering between the two end faces.

[0061] like Figure 1 , Figure 2 , Figure 3 As shown, when the watertight connector assembly is electrically engaged under high water pressure: (1) Before engagement ( Figure 3 (1) The conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 is sealed in insulating oil. Seawater is isolated by three O-rings (first radial seal 1045) and insulating rod 1044, so that the pin 203 is insulated from the conductive, high-temperature resistant, and ablation-resistant front sleeve 1049, and no electric arc will occur between them; (2) As the pin 203 is inserted ( Figure 3 (2) The conductive high-temperature resistant and ablation-resistant contact head 2032 at the front end of the pin 203 first contacts the end face of the insulating rod 1044 and pushes the insulating rod 1044 backward. The conductive high-temperature resistant and ablation-resistant contact head 2032 gradually enters the insulating oil and approaches the conductive high-temperature resistant and ablation-resistant front sleeve 1049. At this time, the insulating layer 2033 on the pin 203 forms a seal with the first radial seal 1045, preventing external seawater from entering the interior and ensuring the internal insulation seal. An electric arc is generated between the conductive high-temperature resistant and ablation-resistant contact head 2032 and the conductive high-temperature resistant and ablation-resistant front sleeve 1049 under the action of the electric field. If only one side exists, an electric arc is generated with the contacting component, protecting only one side. On the one hand, the conductive high-temperature resistant and ablation-resistant contact head 2032 and the conductive high-temperature resistant and ablation-resistant front sleeve 1049 are made of materials that are resistant to high temperatures, arc erosion and welding, and can effectively resist the ablation caused by the arc; on the other hand, the insulating oil has a certain arc-extinguishing effect and can effectively reduce the occurrence of the arc. Under the dual action, the erosion damage of the arc is effectively avoided; (3) As the pin 203 continues to be inserted, the conductive high-temperature resistant and ablation-resistant contact head 2032 and the conductive high-temperature resistant and ablation-resistant front sleeve 1049 ( Figure 2 When the potentials of the two are equal, the electric arc disappears immediately; (4) when the insert pin is further inserted, the two ends are fully inserted into place. Figure 3(3) At this time, the contact surface 2031-1 of the pin 203 contacts the spring 1043, and the connector starts to flow.

[0062] The above-mentioned underwater live plugging and unplugging process, while preventing seawater from entering the interior, protects the contact surface and spring from arc damage by using conductive, high-temperature resistant, and ablation-resistant contact head 2032 and / or conductive, high-temperature resistant, and ablation-resistant front sleeve 1049 to resist electric arc, thereby realizing the deep-water live plugging and unplugging function.

[0063] The above are merely preferred embodiments of this utility model and are not intended to limit or restrict this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection declared by this utility model.

Claims

1. A watertight plug, comprising a plug housing (101), a plug pressing plate (102), a plug insulator (103) and at least one plug contact (104), the plug pressing plate (102) and the plug insulator (103) are respectively fixedly sealed in both ends of the plug housing (101), the both ends of the plug contact (104) are respectively arranged in the plug pressing plate (102) and the plug insulator (103) in the axial direction, the plug contact (104) comprises a plug hole component (1041) with a plug cavity (1041-1), a compression spring (1042), a wire spring (1043), an insulating rod (1044), a first radial seal (1045) and a first oil bag (1046), the compression spring (1042) and the wire spring (1043) are installed in the plug cavity (1041-1) in the axial direction, the wire spring (1043) is arranged at the front end of the compression spring (1042) and is electrically connected with the plug hole component (1041), the front end of the insulating rod (1044) is dynamically sealedly installed in the plug insulator (103) through the first radial seal (1045), the rear end of the insulating rod (1044) passes through the wire spring (1043) and contacts with the compression spring (1042), the insulating rod (1044) can drive the compression spring (1042) to slide in the plug cavity (1041-1) in the axial direction when the insulating rod (1044) is subjected to a thrust, the front end of the first oil bag (1046) is extrusion sealed between the plug insulator (103) and the front end of the plug hole component (1041), the rear end of the first oil bag (1046) is extrusion sealed between the plug pressing plate (102) and the rear end of the plug hole component (1041), the plug hole component (1041) is provided with an opening (1041-2) for communicating the first oil bag (1046) and the plug cavity (1041-1), the first oil bag (1046), the plug hole component (1041) and the insulating rod (1044) surround a first oil-filled cavity (1047), characterized in that: The front end of the wire spring (1043) is provided with a conductive high-temperature-resistant anti-ablation front sleeve (1049) installed in the insertion cavity (1041-1) and capable of contacting the matching plug pin (203) in the plug contact (104), and the conductive high-temperature-resistant anti-ablation front sleeve (1049) is electrically connected with the jack component (1041).

2. A watertight plug as claimed in claim 1, characterized in that: The inner wall surface and / or the outer wall surface of the first oil bag (1046) located at the extrusion sealing position are provided with hooking and matching protrusions and grooves on the contact surface in contact, forming a wave-shaped contact sealing surface (1048).

3. A watertight plug as claimed in claim 2, characterized in that: The conductive high-temperature-resistant anti-ablation front sleeve (1049) is a spring claw structure capable of being elastically opened, and the spring claw structure is composed of an annular body (10491) and elastic teeth (10492) arranged in the circumferential direction of the annular body (10491), and the elastic teeth (10492) can be inserted and opened by the plug pin (203) to realize elastic deformation.

4. A watertight plug as claimed in claim 3, characterized in that: An outer thread is arranged on the outer surface of the annular body (10491) for connecting with the jack component (1041).

5. A watertight plug as claimed in claim 1, characterized in that: The front end of the insulating rod (1044) is provided with a key groove structure (2032-1) matched with the front end of the matching plug pin (203).

6. A watertight plug as claimed in claim 1, characterized in that: The front end surface of the insulating rod (1044) is not lower than the front end surface of the plug insulator (103).

7. A watertight plug as claimed in claim 1, characterized in that: A second oil bag (105) is further provided, which is sleeved outside all the plug contacts (104), the front end of the second oil bag (105) is extrusion sealed between the front end of the plug insulator (103) and the plug housing (101), the rear end of the second oil bag (105) is extrusion sealed between the plug pressing plate (102) and the rear end of the plug housing (101), and the second oil bag (105), the first oil bag (1046), the plug pressing plate (102) and the plug insulator (103) surround a second oil-filled cavity (106).

8. A watertight plug as claimed in claim 1, characterized in that: The inner wall surface and / or the outer wall surface of the second oil bag (105) located at the extrusion sealing position are provided with hooking and matching protrusions and grooves on the contact surface in contact, forming a wave-shaped contact sealing surface (1048).

9. A watertight socket, which is inserted and matched with the watertight plug (1) as claimed in any one of claims 1-8, comprising a socket shell (201), a socket insulator (202) and a pin (203), the socket insulator (202) is sealingly fixed in the socket shell (201), and the pin (203) is sealingly fixed in the socket insulator (202) and arranged in the axial direction, characterized in that: The plug pin (203) is provided with a plug pin body (2031) made of conductive material, a conductive high-temperature-resistant anti-ablation contact head (2032) is installed at the front end of the plug pin body (2031), an insulating layer (2033) is wrapped around the middle part of the plug pin body (2031), and the surface of the plug pin body (2031) between the conductive high-temperature-resistant anti-ablation contact head (2032) and the insulating layer (2033) is a contact surface (2031-1).

10. A watertight socket as claimed in claim 9, characterized in that: The conductive high-temperature-resistant anti-ablation contact head (2032) is installed at the front end of the plug pin body (2031) through friction welding or threaded connection.

11. A watertight socket as claimed in claim 9, characterized in that: The front end of the conductive high-temperature-resistant anti-ablation contact head (2032) is provided with a key groove structure (2032-1) matched with the front end of the matching insulating rod (1044).

12. A watertight socket as claimed in claim 9, characterized in that: The contact surface (2031-1) is plated with a wear-resistant layer.

13. A watertight socket as claimed in claim 9, characterized in that: The front end surface of the insulating layer (2033) is not lower than the front end surface of the socket insulator (202).

14. A watertight connector assembly characterized by: The watertight plug (1) and the watertight socket (2) as claimed in any one of claims 1-8 and 9-13 are combined, and the front end surface of the plug insulator (103) and the front end surface of the socket insulator (202) are completely attached when the plug (1) and the socket (2) are combined in place.

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