Electric connector and oil extraction equipment

Abstract

The embodiment of the invention relates to the technical field of electric connectors, and particularly discloses an electric connector and oil extraction equipment, the electric connector comprises a socket, a plug, a locking ring and a limiting assembly, the socket is provided with a first plugging hole and a second plugging hole which are communicated, and one end, facing the first plugging hole, of the second plugging hole is provided with a first limiting step; the plug can be plugged in the socket, the locking ring is arranged outside the plug in a surrounding mode, the locking ring can penetrate through the first plugging hole to be arranged in the second plugging hole, the axial end of the locking ring abuts against the first limiting step, the plug is sleeved with the limiting assembly, the limiting assembly is detachably connected with the plug, and the limiting assembly is arranged in the second plugging hole. The limiting assembly abuts against the other end, in the axial direction, of the locking ring. According to the electric connector, the plug and the socket are stably connected through the locking ring, and the stability and safety of electric connection of oil extraction equipment are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electrical connectors, and in particular, to an electrical connector and oil production equipment. Background Art

[0002] As a new oil extraction technology, the throwing and catching type submersible electric screw drive device uses a throwing and catching type cable device, which includes a throwing and catching cable, an upper joint and a lower joint. During the process of lowering the submersible unit, the lead-in cable of the submersible unit is connected to the lower joint of the throwing and catching type cable device, and then the oil pipe is installed. After the submersible unit and the oil pipe are all lowered into the oil well, the throwing and catching cable of the throwing and catching type cable device is connected to the upper joint and then lowered together from the oil pipe on the ground. The upper joint and the lower joint are connected underground to realize power transmission.

[0003] At present, the upper and lower joints of the cast-in-place cable device are usually plugged in and docked by directly pressing against each other. During the operation of the oil well, due to factors such as unit vibration and well fluid impact, the upper and lower joints are prone to loosening or even detachment, which is not conducive to the stability and safety of power transmission. The cables currently used are usually steel wire armored, and well fluids are easy to flow out of the cable to the wellbore and pollute the environment. Summary of the invention

[0004] In view of the above problems, the embodiments of the present application provide an electrical connector and oil production equipment, which overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide an electrical connector, including a socket, a plug, a locking ring and a limit assembly, the socket is provided with a first plug-in hole and a second plug-in hole which are connected to each other, and the second plug-in hole is provided with a first limit step at one end facing the first plug-in hole, the plug can be plugged into the socket, the locking ring is arranged outside the plug, the locking ring can pass through the first plug-in hole and then be arranged in the second plug-in hole, and one end of the locking ring along the axial direction abuts against the first limit step, the limit assembly is sleeved on the plug, the limit assembly is detachably connected to the plug, the limit assembly is arranged in the second plug-in hole, and the limit assembly abuts against the other end of the locking ring along the axial direction.

[0006] In some embodiments, the locking ring includes a ring body and a limiting protrusion, the limiting protrusion is arranged on the outer circumferential surface of the ring body, the ring body is arranged around the plug, and a gap is provided between the ring body and the plug, and one end of the limiting protrusion abuts against the first limiting step.

[0007] In some embodiments, the plug includes a connecting section and a first limiting section connected to each other, the first limiting section is provided with a second limiting step at one end facing the connecting section, the first limiting section is arranged in the first plug-in hole, the connecting section is arranged in the second plug-in hole, the ring body is arranged around the connecting section, and one end of the ring body facing away from the limiting assembly abuts against the second limiting step.

[0008] In some embodiments, the ring body is provided with an opening along the circumference of the locking ring, and when the locking ring passes through the first plug-in hole, the limiting protrusion can move along the hole wall of the first plug-in hole, and the ring body can be compressed, and / or, along the axial direction of the locking ring, one end of the limiting protrusion is provided with a first guide slope, and the first guide slope is used for guiding when the plug and the socket are plugged in, and / or, the number of the limiting protrusions is multiple, and the multiple limiting protrusions are arranged at intervals along the circumference of the ring body.

[0009] In some embodiments, the limit assembly includes a limit ring and a shear pin. The limit ring is sleeved on the plug, and the limit ring abuts against the end of the locking ring away from the first limit step. The shear pin is connected between the limit ring and the plug. When the plug is pulled out of the socket, the shear pin can be cut off to separate the limit ring from the plug.

[0010] In some embodiments, a limiting groove is provided on the outer circumferential surface of the plug, and a limiting hole is provided on the limiting ring. The limiting hole is connected to the limiting groove, and two ends of the shear nail are respectively arranged at the limiting groove and the limiting hole.

[0011] In some embodiments, the electrical connector further includes a fixing ring, which is sleeved on the plug, disposed in the first plug hole, and abuts against an end of the locking ring away from the limiting assembly.

[0012] In some embodiments, one end of the socket is provided with an end face, the first plug hole extends from the end face toward the other end of the socket, the plug includes a second limiting section, the second limiting section abuts the end face, and the end of the fixing ring facing away from the locking ring abuts the second limiting section.

[0013] In some embodiments, the plug includes a connecting wire and an outer tube, the connecting wire is arranged in the outer tube, and the locking ring and the limiting assembly are both sleeved on the outer tube.

[0014] In some embodiments, the electrical connector further includes a cable and a switching assembly, wherein the cable is connected to one end of the connecting wire facing away from the socket, the switching assembly is sleeved outside the cable, and one end of the switching assembly is connected to the outer tube.

[0015] In some embodiments, the adapter assembly includes an adapter tube, which is sleeved on the outside of the cable and one end of the adapter tube is connected to the outer tube. The adapter assembly also includes a clamping member, which is connected between the adapter tube and the cable, and / or the adapter assembly also includes a sealing member, which is arranged between the adapter tube and the cable.

[0016] In some embodiments, the cable includes an armored tube body, a power wire and a heating wire, the power wire and the heating wire are respectively arranged in the armored tube body, the adapter assembly is sleeved outside the armored tube body, and the power wire is connected to the connecting wire.

[0017] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide an oil production equipment, including an oil pipe and the above electrical connector, wherein the electrical connector is arranged in the oil pipe.

[0018] The beneficial effect of the embodiment of the present application is as follows: Different from the prior art, the embodiment of the present application provides an electrical connector and oil production equipment, the electrical connector comprising a socket, a plug, a locking ring and a limiting assembly, the socket is provided with a first plug hole and a second plug hole which are connected to each other, the aperture of the first plug hole is smaller than the aperture of the second plug hole, the second plug hole is provided with a first limiting step at one end facing the first plug hole, the plug can be plugged into the socket, the locking ring is arranged outside the plug, the locking ring can be arranged in the second plug hole after passing through the first plug hole, and one end of the locking ring along the axial direction abuts the first limiting step, the limiting assembly is sleeved on the plug, the limiting assembly is detachably connected to the plug, the limiting assembly is arranged in the second plug hole, and the limiting assembly abuts the other end of the locking ring along the axial direction. In the above manner, the electrical connector realizes a stable connection between the plug and the socket through the locking ring, and improves the stability and safety of the electrical connection of the oil production equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0020] Figure 1 is a three-dimensional diagram of an electrical connector provided in an embodiment of the present application; Figure 2 is a component exploded view of the electrical connector provided in an embodiment of the present application; Figure 3 is an enlarged cross-sectional view of a socket provided in an embodiment of the present application; Figure 4 It is a component disassembled diagram of the plug, locking ring, limit assembly, fixing ring and adapter assembly provided in the embodiment of the present application; Figure 5 is an exploded view of the plug and adapter assembly provided in the embodiment of the present application; Figure 6 is a partial cross-sectional view of the connection between the plug, the cable, and the adapter assembly provided in an embodiment of the present application; Figure 7 is an enlarged stereoscopic view of a locking ring provided in an embodiment of the present application; Figure 8 is an enlarged exploded view of the limit assembly provided in an embodiment of the present application; Fig. 9 is a partial cross-sectional view of the connection between the plug and the socket provided in an embodiment of the present application; Fig.10 yes Fig. 9 A partial enlarged view of the middle A area; Fig.11 is a schematic cross-sectional view of a cable provided in an embodiment of the present application; Fig.12 It is a partial cross-sectional view of the electrical connector and the oil pipe provided in the embodiment of the present application;. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0023] See also Figure 1 and Figure 2The electrical connector 100 includes a socket 1, a plug 2, a locking ring 3 and a limiting assembly 4. The plug 2 can be plugged into the socket 1. The locking ring 3 is arranged outside the plug 2. The limiting assembly 4 is sleeved on the plug 2. The limiting assembly 4 is detachably connected to the plug 2. When the plug 2 is plugged into the socket 1, one end of the locking ring 3 along the axial direction is abutted and fixed with the socket 1, and the limiting assembly 4 abuts against the other end of the locking ring 3 along the axial direction to lock the plug 2 into the socket 1.

[0024] See also Figure 3 In some embodiments, the socket 1 is provided with a first plug hole 11 and a second plug hole 12 that are connected to each other. The aperture of the first plug hole 11 is smaller than the aperture of the second plug hole 12. A first limiting step 13 is provided between the first plug hole 11 and the second plug hole 12. When the plug 2 is plugged into the socket 1, the locking ring 3 is arranged in the second plug hole 12 after passing through the first plug hole 11, and one end of the locking ring 3 along the axial direction abuts against the first limiting step 13. The limiting component 4 is arranged in the second plug hole 12, and the limiting component 4 abuts against the other end of the locking ring 3 along the axial direction. The first limiting step 13 and the limiting component 4 respectively limit the two ends of the locking ring 3, thereby reducing the risk of the plug 2 falling off in the socket 1 due to vibration, impact or external force.

[0025] See also Figure 7 In some embodiments, the locking ring 3 includes a ring body 31 and a limiting protrusion 32, the limiting protrusion 32 is arranged on the outer peripheral surface of the ring body 31, the ring body 31 is arranged around the plug 2, and there is a gap between the ring body 31 and the first connecting pipe.

[0026] See also Figures 7 to 10 When the plug 2 is plugged into the socket 1, the locking ring 3 is located in the second plug hole 12 after one end of the plug 2 passes through the first plug hole 11. When the locking ring 3 passes through the first plug hole 11, the limiting protrusion 32 moves along the hole wall of the first plug hole 11, and the ring body 31 is compressed and deformed, so that the locking ring 3 elastically shrinks toward the outer wall of the plug 2 to smoothly insert into the socket 1; when the plug 2 is inserted into the preset position in the socket 1, the plug 2 and the socket 1 are electrically connected, the locking ring 3 is located in the second plug hole 12, and the ring body 31 recovers its deformation under the action of its own elasticity. At this time, one end of the limiting protrusion 32 abuts against the first limiting step 13, so that the plug 2 and the socket 1 are firmly connected to realize the self-locking function of the plug 2.

[0027] In some embodiments, see Figure 7 , along the circumference of the locking ring 3, the ring body 31 is provided with an opening 311. Compared with a complete annular structure, the design of the opening 311 makes it easier for the locking ring 3 to elastically deform when subjected to external compression, so that the locking ring 3 can deform to pass through the first plug hole 11 with a relatively small aperture, and the locking ring 3 can restore its deformation after entering the second plug hole 12.

[0028] In some embodiments, along the axial direction of the locking ring 3, one end of the limiting protrusion 32 is provided with a first guiding slope 321. When the locking ring 3 is inserted into the socket 1 along with the plug 2, the first guiding slope 321 is used for guiding and helps to reduce the resistance during the plugging process.

[0029] In some embodiments, there are multiple limiting protrusions 32, and the multiple limiting protrusions 32 are arranged at intervals along the circumference of the ring body 31. Accordingly, the first limiting step 13 is set as an annular step. The multiple limiting protrusions 32 enhance the connection stability between the locking ring 3 and the socket 1, thereby enhancing the connection stability between the plug 2 and the socket 1, and the multiple limiting protrusions 32 are arranged at intervals so that the locking ring 3 can disperse the pressure more evenly when subjected to external force. In addition, the multiple limiting protrusions 32 are arranged at intervals to reduce the docking force and avoid affecting the deformation capacity of the ring body 31.

[0030] For the above limiter assembly 4, please refer to Figure 8 In some embodiments, the limiting assembly 4 includes a limiting ring 41 and a shearing nail 42. The limiting ring 41 is sleeved on the plug 2, and the limiting ring 41 abuts against an end of the locking ring 3 away from the first limiting step 13. The shearing nail 42 is connected between the limiting ring 41 and the plug 2, and is used to fix the limiting ring 41 to the plug 2.

[0031] When the plug 2 needs to be pulled out of the socket 1, an upward pulling force or pushing force is applied to the plug 2. When the pulling force or pushing force on the shearing nail 42 exceeds its shear strength, the shearing nail 42 is cut off, so that the limiting ring 41 is separated from the outer wall of the plug 2. Since the limiting protrusion 32 of the locking ring 3 abuts against the first limiting step 13 of the socket 1, and there is a gap between the locking ring 3 and the first connecting tube, when the shearing nail 42 is cut off, the upward force continues to be applied to the plug 2, the locking ring 3 and the limiting ring 41 are located in the second plug hole 12, and the plug 2 is smoothly removed from the socket 1.

[0032] In some embodiments, see 8 , along the axial direction of the locking ring 3 , the outer wall of the stop ring 41 is provided with a second guiding slope 412 . The second guiding slope 412 helps to reduce the friction and resistance between the stop ring 41 and the inner wall of the socket 1 , further improving the smoothness of the plug 2 when being inserted into the socket 1 .

[0033] In some embodiments, see Figure 5 and Figure 8 The outer circumference of the plug 2 is provided with a limiting groove 210, and the limiting ring 41 is provided with a limiting hole 411, which is connected to the limiting groove 210. The two ends of the shear nail 42 are respectively located in the limiting groove 210 and the limiting hole 411, which not only enhances the connection strength between the limiting ring 41 and the plug 2, but also reduces the risk of the two ends of the shear nail 42 falling into the socket 1 after being cut off, thereby improving the safety and convenience of operation.

[0034] In some embodiments, the limiting groove 210 is an annular groove, and the limiting groove 210 is arranged around the circumference of the plug 2 .

[0035] In some embodiments, see Figure 2 , Fig. 9 and Fig.10 The electrical connector 100 further includes a fixing ring 5, which is sleeved on the plug 2, and abuts against an end of the locking ring 3 away from the limiting assembly 4. The fixing ring 5 and the limiting assembly 4 limit and fix the locking ring 3 to the plug 2 from both ends of the locking ring 3 along the axial direction. When the plug 2 is plugged into the socket 1, the fixing ring 5 is disposed in the first plug hole 11.

[0036] In some embodiments, the fixing ring 5 is provided with an internal thread, and the outer wall of the plug 2 is provided with an external thread, and the external thread and the internal thread are connected to fix the fixing ring 5 to the plug 2.

[0037] In some embodiments, the fixing ring 5 and the limiting ring 41 respectively abut against two ends of the limiting protrusion 32 along the axial direction to further limit the locking ring 3 and reduce the risk of non-radial deformation of the locking ring 3.

[0038] In some embodiments, see Figure 5 , Fig. 9 and Fig.10 The plug 2 includes a connecting section 21 and a first limiting section 22 connected to each other. The outer diameter of the connecting section 21 is smaller than the outer diameter of the first limiting section 22. The first limiting section 22 is provided with a second limiting step 221 at one end facing the connecting section 21. The ring body 31 of the locking ring 3 is arranged around the connecting section 21, and the end of the ring body 31 facing away from the limiting assembly 4 abuts against the second limiting step 221 to limit the position from one end of the locking ring 3. When the plug 2 is plugged into the socket 1, the first limiting section 22 is located in the first plug hole 11, and the connecting section 21 is arranged in the second plug hole 12.

[0039] In some embodiments, see Figure 3 and Fig.10 , one end of the socket 1 is provided with an end surface 14, and the first plug hole 11 extends from the end surface 14 to the other end of the socket 1. The plug 2 also includes a second limiting section 23, and one end of the fixing ring 5 away from the locking ring 3 abuts against the second limiting section 23. The outer diameter of the second limiting section 23 is larger than the aperture of the first plug hole 11, and the second limiting section 23 abuts against the end surface 14 to limit the depth of further insertion of the plug 2 into the socket 1, thereby reducing the risk of excessive insertion of the plug 2 and collision or damage to the socket 1.

[0040] In some embodiments, see Figure 6 The plug 2 includes a connecting wire 24 and an outer tube 25 . The connecting wire 24 is arranged in the outer tube 25 . The locking ring 3 and the limiting assembly 4 are both sleeved on the outer tube 25 .

[0041] In some embodiments, the electrical connector 100 further includes a cable 7 and an adapter assembly 6, wherein the cable 7 is connected to the end of the connecting wire 24 away from the socket 1, the adapter assembly 6 is sleeved outside the cable 7, and one end of the adapter assembly 6 is connected to the outer tube 25. The adapter assembly 6 can achieve a smooth transition and a firm connection between the cable 7 and the outer tube 25. In some embodiments, see Figure 5 and Figure 6 The adapter assembly 6 includes an adapter tube 61 and a clamping member 62. The adapter tube 61 is sleeved outside the cable 7, and one end of the adapter tube 61 is connected to the outer tube 25. The clamping member 62 is connected between the adapter tube 61 and the cable 7. The adapter tube 61 is firmly connected to the cable 7 through the clamping member 62.

[0042] In some embodiments, the outer wall surface of the clamping member 62 is inclined along the axial direction of the locking ring 3 so that the clamping member 62 can clamp the cable 7 and also facilitates the insertion or removal of the clamping member 62 along the axial direction of the locking ring 3, thereby improving the assembly efficiency and convenience of the adapter assembly 6.

[0043] In some embodiments, the adapter assembly 6 further includes a seal 63 , which is disposed between the adapter tube 61 and the cable 7 to improve the sealing performance of the connection between the cable 7 and the adapter tube 61 .

[0044] In some embodiments, see Figure 5 and Figure 6 The sealing member 63 includes a first sealing pad 631, a first gasket 632, a second gasket 633 and a second sealing pad 634. The first sealing pad 631, the first gasket 632, the second gasket 633 and the second sealing pad 634 are used to be sequentially sleeved on the cable 7. The first sealing pad 631 abuts against the inner step of the second connecting tube, and one end of the third connecting tube abuts against the second sealing pad 634. The sealing assembly is configured as a multi-layer sealing structure, which improves the flexibility and practicality of the sealing assembly. In other embodiments, the material and quantity of the sealing pad and the gasket can be adjusted according to the specific use environment and requirements.

[0045] In some embodiments, see Fig.11 The cable 7 includes an armored tube body 71, a power conductor 73 and a heating conductor 72. The adapter assembly 6 is sleeved outside the armored tube body 71. The power conductor 73 and the heating conductor 72 are respectively arranged in the armored tube body 71. The power conductor 73 is connected to the connecting conductor 24. The power conductor 73 is used to transmit electric energy. The heating conductor 72 is short-circuited with the armored tube body 71, so that the cable 7 has a heating function, reducing the risk of oil condensation or blocking the oil pipe 8 in a low temperature environment. Among them, the armored tube body 71 is a steel tube armored tube body.

[0046] In some embodiments, the cable 7 also includes a filler 74 and an insulating layer 75. The insulating layer 75 is arranged on the inner wall of the armored tube body 71. The filler 74 is used to fill the gap between the heating wire 72 and the power wire 73, and to fill the gap between the armored tube body 71 and the heating wire 72 and the power wire 73, so as to insulate the heating wire 72 and the power wire 73.

[0047] In some embodiments, the armored tube 71 is made of high-strength, corrosion-resistant stainless steel or other alloys.

[0048] In some embodiments, the cable 7 includes a plurality of power conductors 73 , the heating conductor 72 is located at the center of the inner cavity of the armored tube body 71 , and the plurality of power conductors 73 are arranged around the heating conductor 72 at intervals.

[0049] In some embodiments, the number of the power wires 73 is three, and the three power wires 73 are arranged around the heating wire 72 at equal distances.

[0050] In the embodiment of the present application, the electrical connector 100 realizes the self-locking function of the plug 2 through the locking ring 3, thereby improving the stability of the connection between the plug 2 and the socket 1, thereby improving the stability and safety of the electrical connection through the electrical connector 100.

[0051] This application also provides an oil production equipment embodiment, please refer to Fig.12 The oil production equipment includes a power supply (not shown), a unit (not shown), an oil pipe 8 and the above-mentioned electrical connector 100. The structure and function of the electrical connector 100 can be referred to the above-mentioned embodiment, and will not be described here one by one. The power supply is set on the ground, the oil pipe 8 and the unit are set in the oil well, the cable 7, the electrical connector 100 and the socket 1 are set in the oil pipe 8, the two ends of the cable 7 are connected to the power supply and the plug 2 respectively, and the socket 1 is connected to the unit.

[0052] In the embodiment of the present application, the oil production equipment ensures the stability of the connection with the socket 1 through the self-locking function of the plug 2, enhances the stability of the electrical connection in the oil well environment, and thus improves the continuity and reliability of the oil production operation.

[0053] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present application; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. An electrical connector, characterized in that: include: A socket, provided with a first plug hole and a second plug hole connected to each other, wherein one end of the second plug hole facing the first plug hole is provided with a first limiting step; A plug, which can be plugged into the socket; A locking ring, which is arranged outside the plug, and can be arranged in the second plug hole after passing through the first plug hole, and one end of the locking ring along the axial direction abuts against the first limiting step; A limit assembly is sleeved on the plug, the limit assembly is detachably connected to the plug, the limit assembly is arranged in the second plug hole, and the limit assembly abuts against the other end of the locking ring along the axial direction.

2. The electrical connector according to claim 1, characterized in that: The locking ring comprises a ring body and a limiting protrusion, wherein the limiting protrusion is arranged on the outer peripheral surface of the ring body; The ring body is arranged around the plug, and a gap is arranged between the ring body and the plug. One end of the limiting protrusion abuts against the first limiting step.

3. The electrical connector according to claim 2, characterized in that: The plug comprises a connecting section and a first limiting section connected to each other, and a second limiting step is provided at one end of the first limiting section facing the connecting section; The first limiting section is arranged in the first plug hole, and the connecting section is arranged in the second plug hole; The ring body is disposed around the connecting section, and one end of the ring body away from the limiting assembly abuts against the second limiting step.

4. The electrical connector according to claim 2, characterized in that: The ring body is provided with an opening along the circumference of the locking ring, and when the locking ring passes through the first plug hole, the limiting protrusion can move along the hole wall of the first plug hole, and the ring body can be compressed; and / or Along the axial direction of the locking ring, one end of the limiting protrusion is provided with a first guiding inclined surface, and the first guiding inclined surface is used for guiding when the plug and the socket are plugged in; and / or There are multiple limiting protrusions, and the multiple limiting protrusions are arranged at intervals along the circumference of the ring body.

5. The electrical connector according to claim 1, characterized in that: The limiting assembly comprises a limiting ring and a shear pin, wherein the limiting ring is sleeved on the plug and abuts against an end of the locking ring away from the first limiting step, and the shear pin is connected between the limiting ring and the plug; When the plug is pulled out of the socket, the shear nails can be cut off to separate the limiting ring from the plug.

6. The electrical connector according to claim 5, characterized in that: The outer peripheral surface of the plug is provided with a limiting groove, the limiting ring is provided with a limiting hole, and the limiting hole is communicated with the limiting groove; Two ends of the shear nail are respectively arranged at the limiting groove and the limiting hole.

7. The electrical connector according to claim 1, characterized in that: The electrical connector further comprises a fixing ring, which is sleeved on the plug, disposed in the first plug hole, and abuts against an end of the locking ring away from the limiting assembly.

8. The electrical connector according to claim 7, characterized in that: One end of the socket is provided with an end surface, and the first plug hole extends from the end surface toward the other end of the socket; The plug comprises a second limiting section, the second limiting section abuts against the end surface, and one end of the fixing ring facing away from the locking ring abuts against the second limiting section.

9. The electrical connector according to any one of claims 1 to 8, characterized in that: The plug comprises a connecting wire and an outer tube, the connecting wire is arranged in the outer tube, and the locking ring and the limiting assembly are both sleeved on the outer tube.

10. The electrical connector according to claim 9, characterized in that: The electrical connector also includes a cable and a switching assembly. The cable is connected to one end of the connecting wire away from the socket. The switching assembly is sleeved outside the cable, and one end of the switching assembly is connected to the outer tube.

11. The electrical connector according to claim 10, characterized in that: The adapter assembly includes an adapter tube, which is sleeved outside the cable, and one end of the adapter tube is connected to the outer tube; The adapter assembly further includes a clamping member, wherein the clamping member is connected between the adapter tube and the cable; and / or The adapter assembly further includes a sealing member, which is disposed between the adapter tube and the cable.

12. The electrical connector according to claim 10, characterized in that: The cable comprises an armored tube body, a power conductor and a heating conductor, wherein the power conductor and the heating conductor are respectively arranged in the armored tube body; The adapter assembly is sleeved outside the armored tube, and the power conductor is connected to the connecting conductor.

13. An oil production equipment, characterized in that: include: Oil pipes; The electrical connector according to any one of claims 1 to 12, wherein the electrical connector is disposed in the oil pipe.

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