An electromagnetic shielding liquid sealed electrical connector

Abstract

The present invention discloses an electromagnetic shielding liquid-tight electrical connector, which comprises a coaxially arranged tubular metal shell, a pin assembly, a jack assembly and an elastic sheath; the pin assembly is fixed in the central hole of the tubular metal shell, and the two ends of the pin extend outside the tubular metal shell respectively, one end of which is a plug-in connection end, and the other end is electrically connected to the jack assembly through an elastic connector; the elastic sheath is sleeved on the outer periphery of the pin assembly, the elastic connector and the jack assembly, and one end of the elastic sheath is fixedly connected to the outer periphery of the tubular metal shell, and the other end is provided with a docking channel, and the jack insertion port of the jack assembly is connected to the docking channel; a metal shielding net is embedded in the inner circumference of the elastic sheath, one end of the metal shielding net is fixedly electrically connected to the outer periphery of the end of the tubular metal shell, and the other end is fixed to the side wall of the peripheral part of the insertion port of the docking channel. The present invention can meet the application of transmission and conversion of electrical signals in oil wells, overcome the problem of poor insulation between the shell and the pin, and can achieve sealing and shielding of external interference signals at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of electric connectors for converting and transmitting electric signals, in particular to electromagnetic shielding liquid-sealed electric connectors. Background Art

[0002] At present, due to the limitation of oil well size, oil equipment adopts columnar structure design to maximize the use of narrow space. Circular connectors can not only make reasonable use of space, but also achieve sealing between connectors and oil equipment. Circular electrical connectors are mainly in two forms: injection molding and sintering molding. Injection molded connectors have poor air tightness and are prone to leakage when working in high-pressure oil wells, resulting in poor insulation and inability to transmit electrical signals. Sintered connectors generally adopt a method of sintering ceramic bases, glass and ceramic bases together. However, due to certain restrictions in the sintering process, glass is prone to generate bubbles when connecting two ceramic bases. In a high-pressure environment, the bubbles have burst and poor insulation will also occur.

[0003] At the same time, since the electrical connector works in the oil well, it is accompanied by power cables and various signal lines. Its working environment is inevitably accompanied by strong electromagnetic interference and signal crosstalk. In order to solve this problem, a shielded wire interface or a shielded tube interface is generally designed on the connector. However, since the electrical connector works underground, it is still difficult to accurately dock without damaging the connector. Summary of the invention

[0004] The purpose of the present invention is to provide an electromagnetic shielding liquid-sealed electrical connector that can be directly plugged in and out, which can meet the transmission and conversion applications of electrical signals in oil wells, overcome the problem of poor insulation between the shell and the pins, and at the same time achieve sealing and shielding of external interference signals.

[0005] The technical solution adopted by the present invention is specifically: an electromagnetic shielding liquid-sealed electrical connector, comprising a coaxially arranged tubular metal shell, a pin assembly, a jack assembly and an elastic sheath;

[0006] The pin assembly includes a pin and a ceramic base, the pin passes through the ceramic base and is fixedly connected to the ceramic base; the pin assembly is fixed in the central hole of the tubular metal shell, and both ends of the pin extend outside the metal shell respectively, one end of which is a plug-in connection end, and the other end is electrically connected to the jack assembly through an elastic connector;

[0007] The jack assembly includes a jack, and an insertion port is arranged on the opposite end of one end of the jack assembly electrically connected to the pin;

[0008] The elastic sheath is sleeved on the outer periphery of the pin assembly, the elastic connector and the jack assembly, and one end of the elastic sheath is fixedly connected to the outer periphery of the tubular metal shell, and the other end is provided with a docking channel coaxially arranged with the jack assembly, and the insertion port of the jack assembly is connected to the docking channel;

[0009] A metal shielding net is embedded in the inner circumference of the elastic sheath. One end of the metal shielding net is fixedly electrically connected to the outer circumference of the tubular metal shell facing one end of the jack assembly, and the other end passes through the inner wall of the elastic sheath and is fixed on the inner wall of the elastic sheath around the insertion port of the docking channel.

[0010] The elastic sheath in the electrical connector of the present invention can be made of rubber material. When used, the metal shielding mesh in the elastic sheath can ensure the insulation between the housing and the pin, and can be electrically connected to the shielding layer of the external docking device to achieve interference shielding after docking. The external docking device can be inserted into the jack of the jack assembly through the docking channel. Due to the setting of the elastic sheath and the elastic connector, the electrical connector itself has a certain elasticity. Therefore, even if the insertion direction or insertion force is difficult to grasp, the external docking device can still be easily inserted. At the same time, the electrical connector itself will not be damaged due to micro-deformations such as stretching and compression caused by inaccurate insertion direction or force during the insertion process.

[0011] Preferably, in the pin assembly, the inner periphery of the middle portion of the ceramic base is fixedly connected to the periphery of the pin by molten glass, and the outer periphery is fixedly connected to the tubular metal shell by molten glass; at one end of the pin assembly facing the socket assembly, colloid is also injected between the ceramic base and the tubular metal shell, and between the ceramic base and the pin.

[0012] Preferably, the diameter of the lower end of the pin is larger than the diameter of the upper end of the pin, and the portion where the pin is fixedly connected to the ceramic base through molten glass is located at the end with the smaller diameter.

[0013] Preferably, the elastic connector is a vertically symmetrical corrugated spring piece. The vertically symmetrical corrugated spring piece can withstand external forces in the vertical or horizontal directions, thereby ensuring reliable electrical connection performance of the electrical connector.

[0014] Preferably, welding rings are provided at both ends of the elastic connector, and a welding column is provided at the lower end of the socket assembly. The welding rings at both ends of the elastic connector are respectively sleeved and welded to the welding column and the periphery of the upper end of the pin. Preferably, the top of the lower end of the pin is hemispherical, and the top of the upper end is flat, which can facilitate the connection of the welding ring.

[0015] Preferably, a metal shielding mesh fixing groove is provided at the periphery of one end of the tubular metal shell facing the jack assembly, and the lower end of the metal shielding mesh is inwardly contracted and welded and fixed in the metal shielding mesh fixing groove. Preferably, the inner angle of the groove bottom of the metal shielding mesh fixing groove facing the jack assembly side is an obtuse angle. That is, the groove wall of the metal shielding mesh fixing groove is inclined, and the inclination angle can be adapted to the angle formed by the closing of the metal shielding mesh, thereby reducing the shear stress damage to the metal shielding mesh caused by long-term use.

[0016] Preferably, a sealing ring or a sealing ring groove is provided in the inner circumference of the docking channel. The sealing ring or the sealing ring groove is used for external sealing after the electrical connector is docked with the external docking device to prevent liquid from entering the electrical connector from the docking channel. The setting of the sealing ring or the sealing ring groove can be selected according to the shape of the outer shell of the external docking device to achieve the purpose of sealing. The sealing ring can be an annular protrusion protruding from the inner wall surface of the docking channel, and the sealing ring groove is an annular depression.

[0017] Preferably, a plurality of fixing ring grooves are provided at the periphery of one end of the tubular metal shell fixedly connected to the elastic sheath, and the inner periphery of the end of the elastic sheath is clamped in the fixing ring grooves.

[0018] Preferably, the lower end circumference of the tubular metal shell is provided with external threads and a plurality of sealing rings from bottom to top. The external threads are used for fixing the electrical connector to other external devices, and the sealing rings are used for fixing and sealing at the same time.

[0019] Preferably, the metal shielding mesh is a bottle-shaped woven mesh structure woven from silver-plated copper wire, and the mesh density is 50-100 meshes.

[0020] Beneficial Effects

[0021] Compared with the prior art, the present invention has the following advantages and progress:

[0022] 1) The structural design of the pin assembly reduces the sintering process requirements, ensuring that the sintered assembly will not have poor insulation under high temperature and high pressure environments, allowing it to be used in more severe environmental conditions;

[0023] 2) The elastic connector is electrically connected to the pin sintering assembly and the socket assembly by welding, which can ensure the electrical connection between the electrical connector and the docking device;

[0024] 3) The coordinated use of the elastic sheath and the metal shielding net effectively shields the interference of the external electromagnetic field on the inside of the electrical connector. The setting of the elastic sheath and multiple sealing rings can prevent external liquid from entering the interior of the electrical connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of a sintered assembly of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of a tubular metal shell of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0028] Figure 4 It is a schematic diagram of the pin structure of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0029] Figure 5 It is a schematic diagram of the socket structure of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0030] Figure 6 It is a schematic diagram of the protective tube structure of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0031] Figure 7 It is a schematic structural diagram of a jack assembly of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of a ceramic base of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of a metal shielding net of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0034] Fig.10 It is a schematic diagram of the spring structure of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0035] Fig.11 It is a structural schematic diagram of a glass blank a of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0036] Fig.12 It is a structural schematic diagram of a glass blank b of an electromagnetic shielding liquid-sealed electric connector of the present invention;

[0037] Fig.13 It is a partial schematic diagram of the tail structure of an electromagnetic shielding liquid-sealed electrical connector of the present invention;

[0038] In the figure: 1-sintered assembly (sintered assembly of pin assembly and metal shell), 2-spring, 3-jack assembly, 4-metal shielding mesh, 5-elastic sheath, 101-pin, 102-tubular metal shell, 103-ceramic base, 104-glass blank b, 105-glass blank a, 106-colloid, 1021-sealing groove, 1022-slope groove, 1023-fixing groove, 1024-thread, 301-jack, 302-protective tube, 501-rubber sealing groove, 502-docking channel. DETAILED DESCRIPTION

[0039] The invention is further described below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] refer to Figure 1 As shown, the electromagnetic shielding liquid-sealed electrical connector comprises a coaxially arranged tubular metal housing 102, a pin assembly 1, a jack assembly 3 and an elastic sheath 5;

[0042] The pin assembly 1 includes a pin 101 and a ceramic base 103, wherein the pin passes through the ceramic base and is fixedly connected to the ceramic base; the pin assembly 1 is fixed in the central hole of the tubular metal shell 102, and both ends of the pin 101 extend outside the tubular metal shell 102, one end of which is a plug-in connection end, and the other end is electrically connected to the jack assembly 3 through an elastic connector 2;

[0043] The jack assembly 3 includes a jack 302, and an insertion port is provided on the opposite end of the jack assembly 3 that is electrically connected to one end of the pin 101;

[0044] The elastic sheath 5 is sleeved on the outer periphery of the pin assembly 1, the elastic connector 2 and the jack assembly 3, and one end of the elastic sheath 5 is fixedly connected to the outer periphery of the tubular metal shell 102, and the other end is provided with a docking channel 502 coaxially arranged with the jack assembly 3, and the insertion port of the jack assembly 3 is connected to the docking channel 502;

[0045] A metal shielding mesh 4 is embedded in the inner circumference of the elastic sheath 5. One end of the metal shielding mesh 4 is fixedly electrically connected to the outer circumference of the tubular metal shell 102 facing one end of the jack assembly 3, and the other end passes through the inner wall of the elastic sheath 5 and is fixed on the inner wall of the elastic sheath 5 around the insertion opening of the docking channel 502.

[0046] The elastic sheath in the electrical connector of the present invention can be made of rubber material. When used, the metal shielding mesh in the elastic sheath can ensure the insulation between the housing and the pin, and can be electrically connected to the shielding layer of the external docking device to achieve interference shielding after docking. The external docking device can be inserted into the jack of the jack assembly through the docking channel. Due to the setting of the elastic sheath and the elastic connector, the electrical connector itself has a certain elasticity. Therefore, even if the insertion direction or insertion force is difficult to grasp, the external docking device can still be easily inserted. At the same time, the electrical connector itself will not be damaged due to micro-deformations such as stretching and compression caused by inaccurate insertion direction or force during the insertion process.

[0047] Combination Figure 1 and Figure 2In the pin assembly, the inner periphery of the middle part of the ceramic base is fixedly connected to the periphery of the pin by molten glass, and the outer periphery is fixedly connected to the tubular metal shell by molten glass; at one end of the pin assembly facing the socket assembly, colloid is also poured between the ceramic base and the tubular metal shell, and between the ceramic base and the pin.

[0048] The pin assembly and the tubular metal shell are sintered components, which are composed of a pin 101, a ceramic base 103, a glass blank a105, and a glass blank b104 installed in a metal shell 102, and then injected with a colloid 106 after sintering. The pin serves as an inner conductor, the ceramic base serves as an insulator between the pin and the tubular metal shell, the glass blank a serves as an adhesive and sealant to seal the ceramic base and the pin after melting, and the glass blank b serves as an adhesive and sealant to seal the ceramic base and the metal shell after melting. The sintered components are injected with glue, and the colloid plays a role in filling the gaps and protecting the glass in the sintered components.

[0049] The diameter of the lower end of the pin is greater than the diameter of the upper end of the pin, and the portion where the pin is fixedly connected to the ceramic base through molten glass is located at the end with the smaller diameter.

[0050] The jack assembly is formed by press-fitting the jack 301 and the protective tube 302 by using interference fit.

[0051] The elastic connecting member 2 is a corrugated spring piece which is symmetrical up and down.

[0052] The two ends of the elastic connector are respectively provided with welding rings, and the lower end of the socket assembly is provided with welding columns. The welding rings at both ends of the elastic connector are respectively sleeved and welded to the welding columns and the periphery of the upper end of the pin. The top of the lower end of the pin is hemispherical, and the top of the upper end is flat, which can facilitate the connection of the welding ring.

[0053] The elastic sheath is made of vulcanized rubber, wherein the elastic sheath wraps the tail end (upper end) of the welded pin sintered assembly, the metal shielding net, the spring sheet and the jack assembly. The tail end of the shielding net is not wrapped by rubber, and the tail end of the shielding net overlaps with the inner wall surface of the tail end of the elastic sheath.

[0054] A sealing ring or sealing ring groove 501 is provided in the inner circumference of the docking channel of the elastic sheath. The sealing ring or sealing ring groove is used for external sealing after the electrical connector is docked with the external docking device to prevent liquid from entering the electrical connector from the docking channel. The setting of the sealing ring or sealing ring groove can be selected according to the shape of the outer shell of the external docking device to achieve the purpose of sealing. The sealing ring can be an annular protrusion protruding from the inner wall surface of the docking channel, and the sealing ring groove is an annular depression.

[0055] A metal shielding net fixing groove 1022 is provided at the periphery of one end of the tubular metal shell facing the jack assembly, and the lower end of the metal shielding net is inwardly contracted and welded and fixed in the metal shielding net fixing groove. The inner angle of the groove bottom of the metal shielding net fixing groove facing the jack assembly is an obtuse angle. That is, the groove wall of the metal shielding net fixing groove is inclined, and the inclination angle can be adapted to the angle formed by the closing of the metal shielding net, thereby reducing the shear stress damage to the metal shielding net caused by long-term use.

[0056] A plurality of fixing ring grooves are arranged around one end of the tubular metal shell fixedly connected to the elastic sheath, and the inner circumference of the end of the elastic sheath is clamped in the fixing ring grooves. Figure 1 The elastic sheath is fixed by the fixing groove 1023 at the tail end of the metal shell to achieve a sealed connection between the elastic sheath and the sintered component.

[0057] The lower end of the tubular metal shell is provided with external threads and multiple sealing rings from bottom to top. The external threads are used to fix the electrical connector to other external devices, and the sealing rings are used to seal the fixed parts. The top of the metal shell adopts a thread plus sealing groove design, so that when the top of the metal shell is connected to the external device, it is sealed through the threads and the sealing groove; the step surface behind the sealing groove is the pressure-bearing surface.

[0058] The metal shielding mesh is a bottle-shaped woven mesh structure woven with silver-plated copper wire, with a mesh density of 50~100 meshes.

[0059] Example 2

[0060] See also Figure 1 In this embodiment, the electromagnetic shielding liquid-sealed electrical connector is mainly composed of a sintered assembly (pin assembly and tubular metal shell) 1, a spring 2, a jack assembly 3, a metal shielding net 4, and an elastic sheath 5;

[0061] The sintered assembly 1 is formed by inserting a pin 101, a ceramic base 103, a glass blank b104, and a glass blank a105 into a metal shell 102 and then filling the metal shell 102 with glue after sintering; wherein the pin 101 is used as an inner conductor, the ceramic base 103 is used as an insulator between the pin 101 and the metal shell 102, the glass blank a105 is used as an adhesive and sealant to seal the ceramic base 103 and the pin 101 after melting, and the glass blank b104 is used as an adhesive and sealant to seal the ceramic base 103 and the metal shell 102 after melting, and the sintered components are filled with glue, and the colloid 106 plays the role of filling the gap and protecting the glass in the sintered assembly;

[0062] The jack assembly 3 is formed by press-fitting the jack 301 and the protective tube 302 by using interference fit;

[0063] The two ends of the spring piece 2 are respectively welded to the tail end of the pin 101 of the sintered combination 1 and the top end of the socket 301 of the socket assembly 3, so as to realize the electrical connection between the socket assembly and the sintered combination;

[0064] The top of the metal shielding mesh 4 is shrunken, and the top of the metal shielding mesh 4 is welded around the sloped groove 1022 at the rear end of the metal shell 102 of the sintered assembly 1 to achieve electrical connection between the metal shielding mesh 4 and the metal shell 102;

[0065] The flexible elastic sheath 5 is made of vulcanized rubber, wherein the elastic sheath 5 wraps the tail end of the welded sintered component 1, the metal shielding net 4, the spring piece 2 and the jack assembly 3. The tail end of the elastic sheath 5 is provided with a rubber sealing groove 501 and a docking channel 502. The tail end of the metal shielding net 4 overlaps with the tail end of the elastic sheath 5, and the tail end of the metal shielding net 4 is not wrapped by rubber. The top end of the elastic sheath 5 is in close contact with the metal shell 102, and the elastic sheath 5 is fixed by the fixing groove 1023 at the tail end of the metal shell 102, so as to realize the sealed connection between the elastic sheath 5 and the sintered component 1.

[0066] See also Figure 2 A sintered assembly 1 of an electromagnetic shielding liquid-sealed electrical connector of the present invention is formed by inserting a pin 101, a ceramic base 103, a glass blank a105, and a glass blank b104 into a metal shell 102 and then pouring glue after sintering; wherein the pin 101 serves as an inner conductor, the ceramic base 103 serves as an insulator between the pin 101 and the metal shell 102, the glass blank a105 serves as an adhesive and sealant to seal the ceramic base 103 and the pin 101 after melting, and the glass blank b104 serves as an adhesive and sealant to seal the ceramic base 103 and the metal shell 102 after melting, and the sintered components are poured with glue, and the colloid 106 plays a role in filling the gap and protecting the glass in the sintered assembly.

[0067] See also Figure 3 The top of the metal shell 102 of an electromagnetic shielding liquid-sealed electrical connector of the present invention adopts a design of a thread 1024 plus a sealing groove 1021, so that when the top of the metal shell 102 is connected to an external device, it is sealed through the thread 1024 and the sealing groove 1021; the step end face behind the sealing groove 1021 is a pressure-bearing surface; the tail end of the metal shell 102 adopts a design of opening three grooves, among which the slope groove 1022 is a welded metal shielding mesh 4, and the fixing groove 1023 and the slope groove 1022 also have the function of fixing the elastic sheath 5, and realize the sealing between the sintered joint 1 and the elastic sheath 5.

[0068] See also Figure 4 The pin 101 of the electromagnetic shielding liquid-sealed electrical connector of the present invention is asymmetrically designed, with different diameters at both ends, a ball head design at the top and an end face design at the tail, and the diameter of the tail is smaller than the diameter of the ball head.

[0069] See also Figure 5 The top of the socket 301 of the electromagnetic shielding liquid-tight electrical connector of the present invention is provided with a welding column for welding the welding ring of the spring piece 2, and the diameter of the welding column is equal to the diameter of the tail end of the pin; and is equal to the inner diameter of the welding ring of the spring piece 2; two grooves are symmetrically opened at the tail end of the socket 301 for shrinking, so as to realize the interference fit between the butt end of the socket 301 and the protective tube 302.

[0070] See also Figure 6 The protective tube 302 of an electromagnetic shielding liquid-sealed electrical connector of the present invention is of tubular design, with different diameters at both ends inside. One end is a docking end that is press-fitted with the socket 301 by interference, and the other end is a plug-in end that is docked with an external docking device, wherein the diameter of the plug-in end that is docked with the external docking device is larger than the diameter of the docking end that is press-fitted with the socket 301 by interference.

[0071] See also Figure 7 The present invention discloses a socket assembly 3 of an electromagnetic shielding liquid-sealed electrical connector, which is formed by interference fit between a socket 301 and a protective tube 302.

[0072] See also Figure 8 The ceramic base 103 of the electromagnetic shielding liquid-sealed electrical connector of the present invention is in a tubular structure, the inner diameter of the front end of the ceramic base 103 is equal to the diameter of the ball head of the pin 101, and the inner diameter of the rear end is equal to the outer diameter of the glass blank a105; a chamfer is designed in the middle of the ceramic base 103 for embedding the ceramic base 103 and the metal shell 102, so that the ceramic base 103 can be positioned without fixing the ceramic base 103 during sintering.

[0073] See also Fig. 9 The metal shielding net 4 of the electromagnetic shielding liquid-sealed electrical connector of the present invention is woven from non-magnetic, wear-resistant silver-plated copper wire, with a mesh density of 50-100 meshes and a bottle-shaped woven net structure.

[0074] See also Fig.10 The spring piece 2 of the electromagnetic shielding liquid-sealed electrical connector of the present invention is symmetrically designed, with welding rings at both ends and an elastic piece in the middle.

[0075] See also Fig.11 The glass blank a105 of the electromagnetic shielding liquid-sealed electrical connector of the present invention is in a tubular structure, and its inner diameter is equal to the diameter of the tail end of the pin 101.

[0076] See also Fig.12 The glass blank b104 of the electromagnetic shielding liquid-sealed electrical connector of the present invention is in a tubular structure, and its inner diameter is equal to the outer diameter of the rear end of the ceramic base (103).

[0077] See also Fig.13From the partial schematic diagram of the tail of the elastic sheath 4 of the electromagnetic shielding liquid-sealed electrical connector of the present invention, it can be seen that the inner surface of the tail end of the metal shielding net 4 and the inner surface of the tail end of the elastic sheath 5 are in the same plane, and the elastic sheath 4 does not wrap the metal shielding net 4, so that when the docking end of the external docking device is inserted into the docking channel 502 of the elastic sheath 5 and docked with the jack assembly 3, the metal layer of the docking end of the external docking device can be in close contact with the metal shielding net 4.

[0078] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electromagnetic shielding liquid-sealed electrical connector, characterized in that: It includes a coaxially arranged tubular metal shell, a pin assembly, a jack assembly and an elastic sheath; The pin assembly includes a pin and a ceramic base, the pin passes through the ceramic base and is fixedly connected to the ceramic base; the pin assembly is fixed in the central hole of the tubular metal shell, and both ends of the pin extend outside the metal shell respectively, one end of which is a plug-in connection end, and the other end is electrically connected to the jack assembly through an elastic connector; The jack assembly includes a jack, and an insertion port is arranged on the opposite end of one end of the jack assembly electrically connected to the pin; The elastic sheath is sleeved on the outer periphery of the pin assembly, the elastic connector and the jack assembly, and one end of the elastic sheath is fixedly connected to the outer periphery of the metal shell, and the other end is provided with a docking channel coaxially arranged with the jack assembly, and the insertion port of the jack assembly is connected to the docking channel; A metal shielding net is embedded in the inner circumference of the elastic sheath. One end of the metal shielding net is fixedly electrically connected to the outer circumference of the metal shell facing one end of the jack assembly, and the other end passes through the inner wall of the elastic sheath and is fixed on the inner wall of the elastic sheath around the insertion port of the docking channel.

2. The electromagnetic shielding liquid-tight electrical connector according to claim 1, characterized in that: In the pin assembly, the inner periphery of the middle part of the ceramic base is fixedly connected to the periphery of the pin by molten glass, and the outer periphery is fixedly connected to the metal shell by molten glass; at one end of the pin assembly facing the socket assembly, colloid is also poured between the ceramic base and the metal shell, and between the ceramic base and the pin.

3. The electromagnetic shielding liquid-tight electrical connector according to claim 2, characterized in that: The diameter of the lower end of the pin is greater than the diameter of the upper end of the pin, and the portion where the pin is fixedly connected to the ceramic base through molten glass is located at the end with the smaller diameter.

4. The electromagnetic shielding liquid-tight electrical connector according to claim 1, characterized in that: The elastic connecting piece is a corrugated spring piece which is symmetrical up and down.

5. The electromagnetic shielding liquid-tight electrical connector according to claim 1, characterized in that: The two ends of the elastic connector are respectively provided with welding rings, the lower end of the socket assembly is provided with a welding column, and the welding rings at the two ends of the elastic connector are respectively sleeved and welded to the welding column and the periphery of the upper end of the pin.

6. The electromagnetic shielding liquid-tight electrical connector according to claim 1, characterized in that: A metal shielding net fixing groove is arranged on the periphery of one end of the tubular metal shell facing the jack assembly, and the lower end of the metal shielding net is inwardly contracted and welded and fixed in the metal shielding net fixing groove.

7. The electromagnetic shielding liquid-tight electrical connector according to claim 6, characterized in that: The inner angle of the bottom of the metal shielding net fixing groove on the side facing the jack assembly is an obtuse angle.

8. The electromagnetic shielding liquid-tight electrical connector according to claim 1, characterized in that: A sealing ring or a sealing ring groove is provided in the circumferential direction of the docking channel.

9. The electromagnetic shielding liquid-tight electrical connector according to claim 1, characterized in that: A plurality of fixing ring grooves are arranged at the periphery of one end of the tubular metal shell fixedly connected to the elastic sheath, and the inner periphery of the end of the elastic sheath is clamped in the fixing ring grooves.

10. The electromagnetic shielding liquid-tight electrical connector according to claim 1, characterized in that: The circumference of the lower end of the tubular metal shell is sequentially provided with external threads and a plurality of sealing rings from bottom to top.

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