Double-layer oil bag type wet plugging connector

Abstract

The invention provides a double-layer oil bag type wet plugging connector, and belongs to the technical field of connectors, the wet plugging connector comprises a jack contact assembly, the jack contact assembly comprises an inner oil bag sealing structure and a jack contact piece, the inner oil bag sealing structure extends forwards into an insulator from the rear end of an outer oil bag, and the jack contact piece is connected with the inner oil bag sealing structure. The inner oil bag sealing structure is matched with the first insulating plate in an axial stopping mode through a limiting face so as to limit the inner oil bag sealing structure to move forwards, and the inner oil bag sealing structure comprises an insulating sealing component and an inner oil bag connected with the middle-rear section of the insulating sealing component in a sealed mode. And a radial through hole communicated with the internal space of the jack contact piece or the sealing cavity is formed in the outer wall of the section, overlapped with the inner oil bag, in the insulating sealing component. The insulating sealing component can protect or support the inner oil bag, and meanwhile, when the jack contact assembly is installed, the inner oil bag sealing structure and the jack contact piece can be installed in a split manner, so that the installation difficulty is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, and in particular to a double-layer oil-bag type wet plug connector. Background Art

[0002] In order to further explore and develop marine resources, it is necessary to vigorously develop underwater systems that can detect or operate underwater. As an important component of underwater systems, electrical connectors are increasingly being used in order to adapt to underwater operations and plugging and unplugging. Underwater wet-plug electrical connectors can be plugged and unplugged directly in deep-sea environments to achieve the connection or conduction of electrical energy or electrical signals. On the one hand, it can greatly reduce the maintenance cost of underwater systems and facilitate the repair, maintenance and replacement of some underwater systems; on the other hand, it is convenient for the expansion and re-networking of various underwater systems. Therefore, underwater wet-plug electrical connectors are widely used in the field of marine engineering.

[0003] The underwater environment requires the connector to resist both the pressure from water and the corrosion and damage from salt water, microorganisms, silt, marine organisms, etc. This requires the connector to have not only a pressure balance structure to resist the pressure of water, but also a dynamic seal to resist the harsh underwater environment. Based on this, a double-layer oil bladder type wet-plug connector with inner and outer layers of oil bladders came into being.

[0004] However, the existing double-layer oil capsule wet plug connector has the following disadvantages: (1) The existing connector includes an outer oil bag and an inner oil bag, wherein at least one end of the outer oil bag is overlapped on the insulator adjacent to it, which results in a low structural strength of the connector. When encountering severe vibration, the outer oil bag is easily displaced, thereby causing leakage of the pressure balance fluid.

[0005] (2) Existing connectors generally place the inner oil capsule directly on the outside of the socket contact. The size of the inner oil capsule must be very large to completely wrap the socket contact. On the one hand, the installation of the inner oil capsule is difficult and the installation efficiency is low; on the other hand, the inner oil capsule cannot be protected or supported, which is not conducive to the stable fixation of the inner oil capsule. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a double-layer oil bag type wet plug connector, the wet plug connector includes a jack contact assembly, the jack contact assembly includes an inner oil bag sealing structure and a jack contact piece, the inner oil bag sealing structure includes an inner oil bag and an insulating sealing component, and the insulating sealing component can protect or support the inner oil bag. At the same time, when installing the jack contact assembly, the inner oil bag sealing structure and the jack contact piece can be installed separately, which reduces the difficulty of installation and improves the installation efficiency.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: A double-layer oil-bag type wet plug connector, comprising: A shell, wherein a front section of the shell is provided with a cavity; An insulator is disposed in the cavity of the shell and fixedly connected to the shell; An outer oil bag is arranged in the cavity of the shell, a first insulating plate and a second insulating plate are arranged in the outer oil bag from front to back, the first insulating plate, the outer oil bag and the insulator are fixedly connected, a support spring is arranged between the first insulating plate and the second insulating plate, the support spring is used to press the second insulating plate backward against the bottom wall of the cavity of the shell, the front end of the outer oil bag is sealed with the insulator through the first insulating plate, and the rear end is sealed with the shell through the second insulating plate, thereby enclosing a sealed cavity filled with a pressure balancing liquid; At least one socket contact assembly is axially inserted into the shell and the insulator, the socket contact assembly includes an inner oil bag sealing structure and a socket contact piece axially inserted into the inner oil bag sealing structure, the inner oil bag sealing structure extends forward from the rear end of the outer oil bag into the insulator, the inner oil bag sealing structure cooperates with the axial stop of the first insulating plate through a limiting surface to limit the forward movement of the inner oil bag sealing structure, the inner oil bag sealing structure includes an insulating sealing component and an inner oil bag sealedly connected to the middle and rear section of the insulating sealing component, the inner oil bag is in a sealing cavity, and a radial through hole connected to the inner space of the socket contact piece or the sealing cavity is provided on the outer wall of the insulating sealing component in the overlapping section with the inner oil bag.

[0008] Furthermore, the jack contact piece includes a jack adapter column, a jack sleeve, a compression spring, a movable push rod and a conductive ring, the jack adapter column is arranged at the tail of the jack sleeve and extends backward to the outside of the shell, the conductive ring is arranged at the front end of the jack sleeve, an axial through hole is axially arranged in the jack sleeve, the compression spring is arranged in the axial through hole, an oil hole connected to the axial through hole is opened on the outer wall of the jack sleeve, the movable push rod is arranged at the front end of the compression spring, the front end of the movable push rod passes through the conductive ring and extends into the insulator, the inner oil bag sealing structure is sleeved on the outside of the jack sleeve, one end of the inner oil bag sealing structure extends to the rear of the jack sleeve and is tightly connected to the jack adapter column, and the other end extends to the front section of the movable push rod and is sealed and connected to the movable push rod.

[0009] Furthermore, the insulating sealing component includes an insulating sleeve and a sealing block connected to the front end of the insulating sleeve, a radial through hole is provided on the outer wall of the insulating sleeve, and the sealing block is sleeved on the front section of the movable push rod.

[0010] Furthermore, the sealing block is integrally formed with the insulating sleeve by clamping, bonding or vulcanization.

[0011] Furthermore, the sealing block and the movable ejector rod are sealed by direct close contact or an O-ring.

[0012] Furthermore, the insulating sleeve is arranged closely against the outer wall of the jack sleeve, the inner oil bag is sleeved on the outside of the insulating sleeve, one end of the inner oil bag extends to the rear of the jack sleeve and is tightly connected to the jack adapter column, and the other end is sealed and connected to the middle of the outer wall of the insulating sleeve.

[0013] Furthermore, a convex ring is provided on the insulating sleeve in front of the inner oil bag, and the front end surface of the convex ring is a limiting surface, which cooperates with the rear end surface of the first insulating plate to axially stop and limit the forward movement of the inner oil bag sealing structure.

[0014] Furthermore, the inner oil bag is arranged closely against the outer wall of the jack sleeve, the insulating sleeve comprises a small outer diameter section arranged at the front section and a large outer diameter section arranged at the rear section, and the large outer diameter section is arranged outside the inner oil bag to protect the inner oil bag.

[0015] Furthermore, the rear end of the inner oil bag has an outwardly turned flange, and the flange abuts against the rear end surface of the insulating sleeve.

[0016] Furthermore, the connection surface between the large outer diameter section and the small outer diameter section is a limiting surface, and the limiting surface cooperates with the rear end surface of the first insulating plate to axially stop and limit the forward movement of the inner oil bag sealing structure.

[0017] Furthermore, the inner oil bag and the insulating sleeve are interference fit or bonded.

[0018] Furthermore, support rods are provided on opposite sides of the first insulating plate and the second insulating plate, and both ends of the support spring are passed through the support rods.

[0019] Furthermore, a sealing roller is installed on the insulator at a position close to the front end surface corresponding to the socket contact assembly, and the sealing roller is arranged perpendicular to the socket contact assembly.

[0020] Furthermore, the sealing roller comprises a core shaft and a sealing material arranged on the circumferential surface of the core shaft, the sealing material and the insulator are interference fit, and the core shaft and the sealing material are sealed and connected.

[0021] Beneficial effects: As described above, the double-layer oil-bag wet-plug connector of the present invention has the following beneficial effects: (1) The wet plug connector includes a jack contact assembly, which includes an inner oil bag sealing structure and a jack contact. When installing the connector, the outer oil bag, the first insulating plate, the support spring, the second insulating plate and the insulator can be first assembled into an insulating body component, and then the inner oil bag sealing structure can be installed into the insulating body component to form an intermediate body. After that, the intermediate body is installed as a whole into the housing and fixed, and then the jack contact is installed from the jack mounting hole at the rear of the housing to achieve sealing cooperation with the inner oil bag sealing structure. That is, the present invention can install the inner oil bag sealing structure and the jack contact separately, which reduces the difficulty of installation and improves the installation efficiency.

[0022] (2) The present invention arranges the first insulating plate and the second insulating plate inside the outer oil bag, which can not only press the ends of the outer oil bag against the insulator and the shell respectively to achieve a sealed connection between the outer oil bag, the insulator and the shell, but also radially support the outer oil bag to maintain the structural strength of the two ends of the outer oil bag.

[0023] (3) The inner oil bag sealing structure of the present invention includes an inner oil bag and an insulating sealing component. When the inner oil bag is arranged outside the insulating sealing component, on the one hand, the insulating sealing component can support the inner oil bag, and the overall structural strength of the socket contact assembly is higher; on the other hand, with the support of the insulating sealing component, the installation of the socket contact is more convenient. When most of the structure of the inner oil bag (except the flange) is installed in the insulating sealing component, it can not only prevent the inner oil bag from being scratched by foreign objects, but also the inner oil bag is wrapped in the insulating sealing component, so that the outer strength of the inner oil bag sealing structure is higher, which is convenient for the installation and fixation of the inner oil bag sealing structure with the insulator, the first insulating plate, and the second insulating plate.

[0024] (4) The front end of the inner oil bag sealing structure of the present invention is sealed with the movable ejector rod, and the rear end is sealed with the socket adapter column. That is, the inner oil bag sealing structure can be directly sealed with the socket contact piece without the need for other components, thus simplifying the sealing structure of the connector.

[0025] (5) The inner oil bag sealing structure in the present invention cooperates with the first insulating plate through a limiting surface to limit the forward movement of the inner oil bag sealing structure. This design has the following advantages: on the one hand, when installing the socket contact, the movement of the inner oil bag sealing structure can be avoided, which can improve the installation efficiency; on the other hand, it is convenient for the installer to confirm whether the inner oil bag sealing structure is installed in place in the insulator.

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of the wet plug connector in the present invention.

[0029] Figure 2 One of the schematic diagrams of the jack contact assembly.

[0030] Figure 3 for Figure 2 Cross-sectional view at point B.

[0031] Figure 4 This is the second schematic diagram of the jack contact component.

[0032] Figure 5 for Figure 4 Cross-sectional view at point C in the middle.

[0033] Figure 6 This is the third schematic diagram of the jack contact assembly.

[0034] Figure 7 for Figure 6 Cross-sectional view at point D in the middle.

[0035] Figure 8 This is the fourth schematic diagram of the jack contact assembly.

[0036] Fig. 9 for Figure 8 Cross-sectional view at point E in the middle.

[0037] Markings in the diagram: 1. shell; 101. cavity; 2. insulator; 3. first insulating plate; 4. outer oil bag; 5. second insulating plate; 6. sealing roller; 7. jack contact assembly; 71. jack contact piece; 711. jack adapter column; 712. jack sleeve; 7121. axial through hole; 7122. oil hole; 713. compression spring; 714. movable push rod; 715. conductive ring; 72. inner oil bag sealing structure; 72-1. limiting surface; 721. inner oil bag; 7211. flange; 722. insulating sleeve; 7221. radial through hole; 7222. convex ring; 723. sealing block; 724. O-ring; 8. support spring; 9. support rod. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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 creative work are within the scope of protection of the present invention.

[0039] Please refer to Figure 1 The present invention provides a double-layer oil bag type wet plug connector, which includes a housing 1, an insulator 2, an outer oil bag 4, and at least one socket contact component 7 axially inserted into the housing 1 and the insulator 2. The front end of the wet plug connector is the end that docks with the adapter connector. The specific structure is described in detail below.

[0040] The housing 1 is the main load-bearing structure of the connector and provides a sealed space. The front section of the housing 1 has a cavity 101. The cavity 101 is provided with an insulator 2 and an outer oil bag 4 from front to back. The insulator 2 is fixedly connected to the housing 1 (by screws or support columns or other structural forms). The outer oil bag 4 is a hollow structure with an opening. The outer oil bag 4 is provided with a first insulating plate 3 and a second insulating plate 5 from front to back. The first insulating plate 3 and the second insulating plate 5 inserted into the outer oil bag 4 from the opening divide the outer oil bag 4 into a front section from front to back. , middle section and rear section, the first insulating plate 3, the front section of the outer oil bag 4 and the insulator 2 are fixedly connected, a support spring 8 is provided between the first insulating plate 3 and the second insulating plate 5, and the support spring 8 is used to press the second insulating plate 5 backward against the bottom wall of the cavity 101 of the shell 1. One end of the outer oil bag 4 is sealedly connected to the rear end face of the insulator 2 through the first insulating plate 3, and the other end is sealedly connected to the bottom wall of the cavity 101 of the shell 1 through the second insulating plate 5, so that the outer oil bag 4, the insulator 2 and the shell 1 form a sealed cavity filled with pressure balancing liquid. There is a deformation space between the outer oil bag 4 and the inner wall of the shell 1. The outer oil bag 4 is made of elastic material, and can maintain the dynamic balance of the pressure inside and outside the connector when it is deformed during the plugging and unplugging of the connector.

[0041] In the present invention, the first insulating plate 3 and the second insulating plate 5 are both arranged inside the outer oil bag 4, which can not only press the front section and the rear section of the outer oil bag 4 against the insulator 2 and the shell 1 respectively to achieve the sealed connection between the outer oil bag 4, the insulator 2 and the shell 1, but also radially support the outer oil bag 4 to maintain the structural strength of the two ends of the outer oil bag 4. Among them, the first insulating plate 3, the outer oil bag 4 and the insulator 2 can be fixedly connected by screws, and the first insulating plate 3 and the front section of the outer oil bag 4 are both provided with through holes (not shown in the figure) for the screws to pass through. One end of the screw inserted into the outer oil bag 4 from the opening passes through the first insulating plate 3 and the front section of the outer oil bag 4 in turn and is connected to the insulator 2, that is, the fixed connection between the first insulating plate 3, the outer oil bag 4 and the insulator 2 is achieved. Specifically, the opening is provided on the rear section of the outer oil bag 4 and is located in the middle of the positive projection of the second insulating plate 5 to avoid affecting the sealing effect of the connector.

[0042] Preferably, in the present invention, support rods 9 are provided on opposite sides of the first insulating plate 3 and the second insulating plate 5 , and both ends of the support spring 8 are passed through the support rods 9 to prevent the support spring 8 from radially deviating.

[0043] A sealing roller 6 is installed on the insulator 2 at a position close to the front end surface corresponding to the socket contact assembly 7, and the sealing roller 6 is arranged perpendicular to the socket contact assembly 7. Specifically, the sealing roller 6 includes a core shaft and a sealing material arranged on the circumferential surface of the core shaft, and the core shaft and the sealing material are sealed by bonding, vulcanization, etc., and the sealing material and the insulator 2 are interference fit.

[0044] The wet plug connector of the present invention is designed with a double-layer oil bag to achieve pressure balance and dynamic sealing. The outer oil bag 4 achieves the first layer of pressure balance sealing by extruding and sealing with the insulator 2 and the housing 1 and cooperating with the sealing roller 6 at the front end. The socket contact assembly 7 itself can achieve the second layer of pressure balance sealing, so that the connector as a whole can achieve a double layer of pressure balance sealing. During the plugging and unplugging process of the connector, the outer oil bag 4 and the socket contact assembly 7 are deformed so that the pressure inside and outside the connector is in a dynamic balance process, ensuring that the connector can be plugged and unplugged smoothly in an underwater pressure environment. The specific structure of the socket contact assembly 7 is described in detail below.

[0045] The jack contact assembly 7 includes a jack contact piece 71 and an inner oil bag sealing structure 72. The jack contact piece 71 includes a jack adapter column 711, a jack sleeve 712, a compression spring 713, a movable push rod 714 and a conductive ring 715. The jack adapter column 711 is arranged at the tail of the jack sleeve 712. The rear end of the jack adapter column 711 has a terminal that passes through the housing 1 backward. The conductive ring 715 is arranged at the front end of the jack sleeve 712. The conductive ring 715 is used to elastically contact and conduct with the pin of the adapter connector. The conductive ring 715 can be a wire spring, a crown spring, etc. to improve the contact stability between the pin and the jack contact piece 71. The jack sleeve 712 is provided with a conductive terminal. An axial through hole 7121 is axially arranged, the compression spring 713 is arranged in the axial through hole 7121, an oil hole 7122 connected with the axial through hole 7121 is opened on the outer wall of the jack sleeve 712, the movable push rod 714 is arranged at the front end of the compression spring 713, the front end of the movable push rod 714 passes through the conductive ring 715 and extends into the insulator 2, the inner oil bag sealing structure 72 is sleeved on the outside of the jack sleeve 712, one end of the inner oil bag sealing structure 72 extends to the rear of the jack sleeve 712 and is sealed and connected to the jack adapter column 711, and the other end extends to the front section of the movable push rod 714 and is sealed and connected to the movable push rod 714.

[0046] When assembling the connector, the outer oil bag 4, the first insulating plate 3, the supporting spring 8, the second insulating plate 5 and the insulator 2 can be assembled into an insulator component first, and then the inner oil bag sealing structure 72 can be installed into the insulator component, and the front end of the inner oil bag sealing structure 72 can be inserted into the insulator 2 to form an intermediate body. After that, the intermediate body is installed into the shell 1, and the insulator 2 and the shell 1 are fixed, and then the socket contact piece 71 is installed from the socket mounting hole at the rear of the shell 1 to achieve sealing cooperation with the inner oil bag sealing structure 72. The present invention adopts the idea of ​​"component" split plug-in installation, which reduces the difficulty of installation and improves the installation efficiency.

[0047] The inner oil bag sealing structure 72 includes an inner oil bag 721 and an insulating sealing component which are sealed and connected. The inner oil bag 721 is made of elastic material and is located in a sealed cavity. When the connector is plugged into the adapter connector, the plug pin of the adapter connector pushes the movable push rod 714, the movable push rod 714 retreats, the compression spring 713 is compressed, the plug pin enters the jack of the jack contact 71 and conducts with the conductive ring 715, and the contact and conduction of the plug-in double-end connector is realized. At this time, the internal space of the inner oil bag 721 changes, the inner oil bag 721 expands, and the pressure is transmitted to the sealed cavity through the volume change of the inner oil bag 721, and then the pressure balance is achieved through the deformation of the outer oil bag 4, so as to facilitate the smooth plug-in and unplug process of the connector underwater.

[0048] When the inner oil bag 721 is connected to the insulating sealing component, sealing can be achieved through interference fit between the inner oil bag 721 and the insulating sealing component, or sealing and fixing between the two can be achieved by vulcanization bonding, gluing, etc.

[0049] The insulating sealing component includes an insulating sleeve 722 and a sealing block 723 arranged at the front end of the insulating sleeve 722. The outer wall of the insulating sleeve 722 in the overlapping section with the inner oil bag 721 is provided with a radial through hole 7221 connected to the internal space or sealing cavity of the jack contact 71, and the sealing block 723 is sleeved on the front section of the movable top rod 714. It should be noted that the present invention does not limit the connection form between the insulating sleeve 722 and the sealing block 723, as long as a sealed connection can be achieved. For example, the front end of the insulating sleeve 722 and the sealing block 723 can be sealed and connected by snapping or bonding; or, the insulating sleeve 722 can also be integrally formed with the sealing block 723 by vulcanization. The sealing block 723 is made of rubber material, and the insulating sealing component can achieve a sealed connection between the insulating sealing component and the movable top rod 714 through the close contact between the sealing block 723 and the movable top rod 714 (please refer to Figure 3 and Figure 5 ), the insulating sealing component and the movable ejector rod 714 can also be sealed by providing an O-ring 724 at the front end of the insulating sealing component (please refer to Figure 7 and Fig. 9 ).

[0050] As one of the solutions of the present invention, please refer to Figure 3 and Fig. 9 The insulating sleeve 722 is arranged close to the outer wall of the jack sleeve 712, and the inner oil bag 721 is sleeved on the outside of the insulating sleeve 722. One end of the inner oil bag 721 extends to the rear of the jack sleeve 712 and is sealed with the jack adapter column 711 to ensure the sealing effect of the jack contact 71, and the other end is in close contact with the middle of the outer wall of the insulating sleeve 722. The insulating sleeve 722 is provided with a radial through hole 7221 connected to the inner space of the jack contact 71. When the wet plug connector and the adapter connector are plugged in, they will expand and deform, and the pressure balance fluid passes through the jack contact 71 and the radial through hole 7221 to deform the inner oil bag 721. In this solution, the inner oil bag 721 is installed on the outside of the insulating sleeve 722. The insulating sleeve 722 can support the inner oil bag 721. The overall structural strength of the jack contact assembly 7 is higher. The inner hole side wall strength of the inner oil bag sealing structure 72 used to install the jack contact 71 is also higher, which facilitates the installation of the jack contact 71.

[0051] Specifically, when the inner oil bag 721 is installed on the outside of the insulating sleeve 722, a circle of convex ring 7222 is provided on the insulating sleeve 722 in front of the inner oil bag 721, and the front end face of the convex ring 7222 is a limiting surface 72-1, and the limiting surface 72-1 cooperates with the rear end face of the first insulating plate 3 to axially stop and limit the forward movement of the inner oil bag sealing structure 72.

[0052] As another solution of the present invention, please refer to Figure 5 and Figure 7 The inner oil bag 721 is arranged close to the outer wall of the jack sleeve 712, and the insulating sleeve 722 includes a small outer diameter section arranged at the front section and a large outer diameter section arranged at the rear section. The large outer diameter section is arranged outside the inner oil bag 721 to protect the inner oil bag 721. This solution installs most of the structure of the inner oil bag 721 into the insulating sleeve 722, which has the following advantages: (1) The size of the inner oil bag 721 can be designed to be small, which is convenient for installation; (2) The insulating sleeve 722 can protect the inner oil bag 721 and prevent scratches from foreign objects; (3) The inner oil bag 721 is wrapped in the insulating sleeve 722, so that the overall strength of the outer part of the inner oil bag sealing structure 72 is relatively high, which is convenient for the installation and fixation of the inner oil bag sealing structure 72 with the insulator 2, the first insulating plate 3, and the second insulating plate 5. At this time, the insulating sleeve 722 is provided with a relatively large radial through hole 7221 to prevent the expansion and deformation of the portion of the inner oil bag 721 corresponding to the radial through hole 7221 when the connector is plugged into the adapter connector.

[0053] It should be noted that the present invention provides a flange 7211 at the rear end of the inner oil bag 721. When the socket contact 71 is inserted from the tail to the front, the flange 7211 prevents the inner oil bag 721 from being easily rolled into the insulating sleeve 722, making it easier to install the socket contact 71 in place.

[0054] Specifically, when most of the structure of the inner oil bag 721 (except the flange 7211) is installed in the insulating sleeve 722, the connecting surface between the large outer diameter section and the small outer diameter section is the limiting surface 72-1, and the limiting surface 72-1 cooperates with the rear end surface of the first insulating plate 3 to axially stop and limit the forward movement of the inner oil bag sealing structure 72.

[0055] Anything not described in the present invention belongs to the prior art.

[0056] The above is a detailed introduction to a double-layer oil-bag wet-plug connector provided by the present invention. This article uses specific examples to illustrate the principles and specific implementation methods of the present invention. The above embodiments are only used to help understand the methods and core ideas of the present invention. It should be pointed out that for ordinary technicians in this field, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A double-layer oil-bag wet-plug connector, characterized in that: include: A housing (1), wherein a front section of the housing (1) is provided with a cavity (101); An insulator (2) is disposed in the cavity (101) of the housing (1) and is fixedly connected to the housing (1); An outer oil bag (4) is arranged in the cavity (101) of the shell (1), wherein a first insulating plate (3) and a second insulating plate (5) are arranged in intervals from front to back inside the outer oil bag (4), wherein the first insulating plate (3), the outer oil bag (4) and the insulator (2) are fixedly connected, and a support spring (8) is arranged between the first insulating plate (3) and the second insulating plate (5), wherein the support spring (8) is used to press the second insulating plate (5) backward against the bottom wall of the cavity (101) of the shell (1), wherein the front end of the outer oil bag (4) is sealedly connected to the insulator (2) through the first insulating plate (3), and the rear end is sealedly connected to the shell (1) through the second insulating plate (5), thereby enclosing a sealed cavity filled with a pressure balancing liquid; At least one socket contact assembly (7) is axially inserted into the housing (1) and the insulator (2). The socket contact assembly (7) comprises an inner oil bag sealing structure (72) and a socket contact piece (71) axially inserted into the inner oil bag sealing structure (72). The inner oil bag sealing structure (72) extends forward from the rear end of the outer oil bag (4) into the insulator (2). The inner oil bag sealing structure (72) cooperates with the first insulating plate (3) in axial blocking via a limiting surface (72-1) to limit the forward movement of the inner oil bag sealing structure (72). The inner oil bag sealing structure (72) comprises an insulating sealing component and an inner oil bag (721) sealedly connected to the middle and rear section of the insulating sealing component. The inner oil bag (721) is located in a sealing cavity. A radial through hole (7221) communicating with the inner space of the socket contact piece (71) or the sealing cavity is provided on the outer wall of the insulating sealing component at a section overlapping with the inner oil bag (721).

2. A double-layer oil-bag wet-plug connector according to claim 1, characterized in that: The jack contact piece (71) comprises a jack adapter column (711), a jack sleeve (712), a compression spring (713), a movable push rod (714) and a conductive ring (715); the jack adapter column (711) is arranged at the rear of the jack sleeve (712) and extends backward to the outside of the housing (1); the conductive ring (715) is arranged at the front end of the jack sleeve (712); an axial through hole (7121) is axially arranged in the jack sleeve (712); the compression spring (713) is arranged in the axial through hole (7121); and the outer wall of the jack sleeve (712) is provided with a conductive ring (715). An oil hole (7122) communicating with the axial through hole (7121) is provided, the movable push rod (714) is arranged at the front end of the compression spring (713), the front end of the movable push rod (714) penetrates the conductive ring (715) and extends into the insulator (2), the inner oil bag sealing structure (72) is sleeved on the outside of the jack sleeve (712), one end of the inner oil bag sealing structure (72) extends to the rear of the jack sleeve (712) and is tightly connected to the jack adapter column (711), and the other end extends to the front section of the movable push rod (714) and is sealed to the movable push rod (714).

3. A double-layer oil-bag wet-plug connector according to claim 2, characterized in that: The insulating sealing component comprises an insulating sleeve (722) and a sealing block (723) connected to the front end of the insulating sleeve (722); a radial through hole (7221) is provided on the outer wall of the insulating sleeve (722); and the sealing block (723) is sleeved on the front section of the movable top rod (714).

4. A double-layer oil-bag wet-plug connector according to claim 3, characterized in that: The sealing block (723) and the insulating sleeve (722) are clamped, bonded, or integrally formed by vulcanization.

5. The double-layer oil-bag wet-plug connector according to claim 3, characterized in that: The sealing block (723) and the movable ejector rod (714) are sealed by direct close contact or an O-ring (724).

6. A double-layer oil-bag wet-plug connector according to claim 3, characterized in that: The insulating sleeve (722) is arranged closely against the outer wall of the jack sleeve (712); the inner oil bag (721) is sleeved on the outside of the insulating sleeve (722); one end of the inner oil bag (721) extends to the rear of the jack sleeve (712) and is tightly connected to the jack adapter column (711); and the other end is sealedly connected to the middle of the outer wall of the insulating sleeve (722).

7. A double-layer oil-bag wet-plug connector according to claim 6, characterized in that: A convex ring (7222) is provided on the insulating sleeve (722) in front of the inner oil bag (721); the front end surface of the convex ring (7222) is a limiting surface (72-1); the limiting surface (72-1) cooperates with the rear end surface of the first insulating plate (3) to axially stop and limit the inner oil bag sealing structure (72) from moving forward.

8. The double-layer oil-bag wet-plug connector according to claim 3, characterized in that: The inner oil bag (721) is arranged closely against the outer wall of the jack sleeve (712); the insulating sleeve (722) comprises a small outer diameter section arranged at the front section and a large outer diameter section arranged at the rear section; the large outer diameter section is arranged outside the inner oil bag (721) to protect the inner oil bag (721).

9. A double-layer oil-bag wet-plug connector according to claim 8, characterized in that: The rear end of the inner oil bag (721) has an outwardly turned flange (7211), and the flange (7211) abuts against the rear end surface of the insulating sleeve (722).

10. The double-layer oil-bag wet-plug connector according to claim 8, characterized in that: The connecting surface between the large outer diameter section and the small outer diameter section is a limiting surface (72-1), and the limiting surface (72-1) cooperates with the rear end surface of the first insulating plate (3) in an axial stop manner to limit the forward movement of the inner oil bag sealing structure (72).

11. A double-layer oil-bag wet-plug connector according to claim 6 or 8, characterized in that: The inner oil bag (721) and the insulating sleeve (722) are interference fit or bonded.

12. The double-layer oil-bag wet-plug connector according to claim 1, characterized in that: Support rods (9) are provided on opposite sides of the first insulating plate (3) and the second insulating plate (5), and both ends of the support spring (8) are passed through the support rods (9).

13. The double-layer oil-bag wet-plug connector according to claim 1, characterized in that: A sealing roller (6) is installed on the insulator (2) at a position close to the front end surface corresponding to the socket contact assembly (7), and the sealing roller (6) is arranged perpendicular to the socket contact assembly (7).

14. A double-layer oil-bag wet-plug connector according to claim 13, characterized in that: The sealing roller (6) comprises a core shaft and a sealing material arranged on the circumferential surface of the core shaft, the sealing material and the insulator (2) are interference fit, and the core shaft and the sealing material are sealed and connected.

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