Watertight large-current connector with coaxial structure

Abstract

The invention belongs to the technical field of connectors, and provides a watertight large-current connector of a coaxial structure, which comprises a plug and a socket in plugging fit with the plug, and is characterized in that the plug comprises a plug shell and a plug electrode pin fixed in the plug shell through a plug inner core; the plug electrode pin comprises a plug outer conductor and a plug inner conductor which are coaxially arranged and insulated from each other. The plug outer conductor and the plug inner conductor which are coaxially arranged and mutually insulated serve as the positive electrode and the negative electrode respectively for large-current transmission, temperature rise caused by heat generated by an induced electric field can be effectively avoided, and then the phenomenon that a shell is seriously heated due to the fact that the connector transmits large direct current for a long time is improved.

Description

Technical Field

[0001] This invention belongs to the field of connector technology, and particularly relates to a watertight high-current connector with a coaxial structure. Background Technology

[0002] When watertight electrical connectors are used to transmit high current, they are generally equipped with positive and negative poles. The most widely used structure, as disclosed in patent number CN119340718A, has independent positive and negative poles located inside the housing. However, when transmitting high current DC power for a long time, the connector housing will overheat. Summary of the Invention

[0003] To address the shortcomings of existing watertight electrical connectors that use independent positive and negative poles to transmit high-current DC power for extended periods, which leads to severe overheating of the housing, this application proposes a coaxial watertight high-current connector. By using coaxially arranged and mutually insulated outer and inner conductors of the plug as the positive and negative poles respectively, high-current transmission is achieved. This effectively avoids heat generation from the induced electric field, thus mitigating the problem of severe housing overheating caused by prolonged transmission of high-current DC power. This design allows for the transmission of 200A current at depths of 500–1000 meters underwater.

[0004] The specific technical solution is as follows: A coaxial watertight high-current connector includes a plug and a socket for plug-in mating. The plug includes a plug housing and plug electrode pins fixed in the plug housing by a plug inner core. The plug electrode pins include a plug outer conductor and a plug inner conductor that are coaxially arranged and insulated from each other.

[0005] According to the present invention, a watertight high-current connector with a coaxial structure is provided, wherein the inner conductor of the plug is fixed inside the outer conductor of the plug by a plug insulator.

[0006] According to the present invention, a coaxial watertight high-current connector further includes a plug cable, wherein the cable comprises, from the inside out, an inner cable conductor, an inner insulation layer, an outer cable conductor, and an outer insulation layer, wherein the end of the inner cable conductor protrudes beyond the outer cable conductor, and the end of the outer cable conductor protrudes beyond the outer insulation layer.

[0007] According to the present invention, a watertight high-current connector with a coaxial structure has a potting hole on the side wall of the outer conductor of the plug, which extends into the interior. The potting hole corresponds to the terminal of the inner conductor of the plug. Sealant is injected through the potting hole to fix the outer conductor and the inner conductor of the plug.

[0008] According to the present invention, a watertight high-current connector with a coaxial structure is provided, wherein a notch is provided on the inner conductor of the plug. When the inner cable conductor is inserted into the terminal of the inner conductor of the plug, part of the inner cable conductor is exposed through the notch, so that the sealant can penetrate into the inner conductor of the plug and simultaneously fix the inner conductor of the plug and the inner cable conductor.

[0009] According to the present invention, a watertight high-current connector with a coaxial structure has a through-hole on the side wall of the outer conductor of the plug. When the inner cable conductor is inserted into the terminal of the inner conductor of the plug, the outer cable conductor is aligned with the through-hole, and the outer cable conductor and the outer conductor of the plug are fixed by welding through the through-hole.

[0010] According to the coaxial structure of the watertight high-current connector provided by the present invention, a spacer is further provided inside the outer conductor of the plug. The spacer is located between the solder hole and the potting hole, dividing the internal space of the outer conductor of the plug into a potting cavity and a soldering cavity.

[0011] According to the present invention, a watertight high-current connector with a coaxial structure is provided, wherein the spacer is annular, the spacer is sleeved on the inner insulating layer, and abuts against the outer cable conductor.

[0012] According to the present invention, a coaxial structure watertight high-current connector is provided, wherein the plug electrode pins are fixed in the plug core by abutting surfaces and limiters arranged in an axial direction, and the plug core is also fixed in the plug housing by abutting surfaces and limiters arranged in an axial direction.

[0013] The beneficial effects of this invention are as follows: The connector of the present invention uses the coaxially arranged and mutually insulated outer and inner conductors of the plug as positive and negative electrodes, respectively, to transmit large currents. This effectively avoids the heat generated by the induced electric field, thus improving the phenomenon that the shell will overheat when the connector transmits large current DC power for a long time. Attached Figure Description

[0014] Figure 1 The diagram shown is a structural schematic of the watertight high-current connector with a coaxial structure according to the present invention. Figure 2 The diagram shown is a structural schematic of the plug of the present invention; Figure 3 The figure shown is a three-dimensional structural diagram of the plug core of the present invention; Figure 4 The diagram shown is a cross-sectional view of the inner core of the plug of the present invention. Figure 5 The image shown is one of the structural schematic diagrams of the plug electrode pins of the present invention; Figure 6 The diagram shown is a second schematic diagram of the structure of the plug electrode pins of the present invention; Figure 7 The diagram shown is a structural schematic of the cable used in this invention; Figure 8 The diagram shown illustrates the connection state between the cable and the plug electrode pins in this invention. Figure 9 The diagram shown is a structural schematic of the socket of the present invention; Figure 10 The image shown is one of the structural schematic diagrams of the socket electrode pins of the present invention; Figure 11 The second schematic diagram shows the structure of the socket electrode pin of the present invention.

[0015] Figure label: 1-Plug; 2-Socket; 11-Plug electrode pin; 12-Plug inner core; 13-Plug housing; 111-Plug outer conductor; 112-Plug inner conductor; 113-Plug insulator; 14-Snap ring one; 15-Snap ring two; 16-Nut; 114-Spacer; 121-Step surface one; 122-Keyway; 123-Protrusion; 124-Ring groove one; 111a-Step surface two; 111b-Step surface three; 111c-Pouring hole; 111d-Welding hole; 112a-Notch; 21-Socket electrode pin; 22-Socket inner core; 23-Socket housing; 211-Socket outer conductor; 212-Socket inner conductor; 213-Socket insulator; 23a-Threaded opening; 31-Inner cable conductor; 32-Inner insulation layer; 33-Outer cable conductor; 34-Outer insulation layer. Detailed Implementation

[0016] In the following description, certain specific details are set forth in order to provide a thorough understanding of various embodiments. However, those skilled in the art will understand that the invention can be practiced without these details. In other instances, well-known structures have not been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments. Unless the context otherwise requires, throughout the specification and appended claims, the word "comprising" should be interpreted in an open-ended, inclusive sense, i.e., as "including but not limited to".

[0017] Figure 1 This diagram shows a structural schematic of the watertight high-current connector with a coaxial structure according to the present invention. Figure 1 The coaxial watertight high-current connector of this invention includes: The plug 1 and the socket 2 are pluggably connected to each other. The plug 1 has a plug electrode pin 11 fixedly installed inside it. The plug electrode pin 11 includes a positive pole and a negative pole that are coaxially arranged and insulated from each other. The positive pole and the negative pole are used to transmit positive current and negative current, respectively. Correspondingly, the socket 2 also has an electrode socket that mates with the plug electrode pin 11.

[0018] By setting the positive and negative terminals used for transmitting large currents in the connector to a coaxial structure, the heat generated by the induced electric field can be effectively avoided, thus preventing temperature rise.

[0019] Figure 2 This diagram shows the structure of the plug 1 of the present invention. Figure 2 In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, the plug 1 further includes a plug inner core 12 and a plug housing 13. The plug housing 13 is a cylindrical rotating body with an internal cavity to accommodate the plug inner core 12. The plug inner core 12 is an insulating component and is disposed between the plug housing 13 and the plug electrode pin 11 to achieve mutual insulation and fixation between the two.

[0020] Figure 3 and Figure 4 This diagram shows the structure of the plug core 12 of the present invention, wherein... Figure 3 It is a 3D image. Figure 4 As shown in the cross-sectional view, the outer surface of the plug inner core 12 forms a stepped surface 121 through protrusions. This stepped surface 121 is used to mate with the stepped surface on the inner wall of the plug housing 13. After the plug inner core 12 is assembled into the plug housing 13, they abut against each other to limit the plug inner core 12 and prevent the plug inner core 12 from moving axially.

[0021] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, the outer surface of the plug core 12 is also provided with a keyway 122. The keyway 122 is located on the protrusion forming the stepped surface 121. Correspondingly, a positioning key that cooperates with the keyway 122 is provided on the inner wall of the plug housing 13. After the plug core 12 is assembled into the plug housing 13, the positioning key is engaged in the keyway 122, which plays the role of preventing the plug core 12 from rotating.

[0022] Figure 5 This diagram shows the structure of the plug electrode pin 11 of the present invention, in conjunction with... Figure 5 The plug electrode pin 11 includes an outer plug conductor 111 and an inner plug conductor 112 that are insulated from each other. The outer plug conductor 111 and the inner plug conductor 112 are coaxial rotating bodies and are used to transmit positive and negative currents respectively.

[0023] Furthermore, a stepped surface 111a is provided on the outer wall of the plug outer conductor 111, and correspondingly, a radial protrusion 123 is provided on the inner surface of the plug inner core 12. After the plug electrode pin 11 is assembled into the plug inner core 12, the stepped surface 111a abuts against the protrusion 123, thereby preventing the plug electrode pin 11 from moving axially.

[0024] An annular groove 124 is provided on the inner surface of the plug core 12. A stepped surface 111b is provided on the outer wall of the plug outer conductor 111. The stepped surface 111a is opposite in direction to the stepped surface 111b. By embedding a retaining ring 14 in the annular groove 124, the elastic sheet on the retaining ring 14 abuts against the stepped surface 111b, thereby keeping the stepped surface 111a abutting against the protrusion 123, so that the plug core 12 and the plug electrode pin 11 are stably connected.

[0025] A second annular groove is provided on the inner wall of the plug housing 13, and a second retaining spring 15 is provided in the second annular groove. After the second retaining spring 15 is embedded in the second annular groove, it abuts against the end face of the plug inner core 12, thereby cooperating with the stepped surface on the inner wall of the plug housing 13 to fix the plug inner core 12 in the plug housing 13.

[0026] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, a rotatable nut 16 is also provided on the outside of the plug housing 13. The nut 16 is screwed into the socket 2 to realize the fixed connection between the plug 1 and the socket 2.

[0027] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, a plug insulator 113 is provided between the plug outer conductor 111 and the plug inner conductor 112. The plug inner conductor 112, plug insulator 113 and plug outer conductor 111 are arranged sequentially from the inside to the outside. After the plug inner conductor 112 is inserted into the plug insulator 113 from the wire end, it is further restricted by the step surface. Similarly, after the plug insulator 113 is inserted into the plug outer conductor 111 from the wire end, it is further restricted by the step surface. In this way, the plug outer conductor 111 and plug inner conductor 112 are isolated from each other and coaxially fixed by the plug insulator 113.

[0028] Figure 6 This is a second schematic diagram of the structure of the plug electrode pin 11 of the present invention, combined with... Figure 5 and Figure 6 The plug outer conductor 111 is provided with a potting hole 111c and a soldering hole 111d. The potting hole 111c is located between the soldering hole 111d and the stepped surface 111b. The potting hole 111c is used to inject sealant into the plug electrode pin 11 to fix the cable and the plug electrode pin 11 as a whole. The soldering hole 111d is used to solder the plug outer conductor 111 to the corresponding cable conductor to achieve electrical conduction.

[0029] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, combined with Figure 5 The inner conductor 112 of the plug has a notch 112a for fitting and fixing the cable.

[0030] Figure 7This invention provides a schematic diagram of the cable structure used in this invention. Figure 7 The cable consists of an inner conductor 31, an inner insulation layer 32, an outer conductor 33, and an outer insulation layer 34, arranged from the inside out. The end of the inner conductor 31 protrudes beyond the outer conductor 33, and the end of the outer conductor 33 protrudes beyond the outer insulation layer 34, thus exposing both the inner conductor 31 and the outer conductor 33.

[0031] Figure 8 This diagram illustrates the connection state between the cable and the plug electrode pin 11 in this invention. Figure 8 After inserting the inner cable conductor 31 into the socket of the inner conductor 112 of the plug, the outer cable conductor 33 is aligned with the solder hole 111d and the notch 112a is aligned with the potting hole 111c. Sealant is injected into the outer conductor 111 of the plug through the potting hole 111c. After the sealant cures, it fills the internal gap of the outer conductor 111 of the plug and fixes the inner conductor 112 and the plug insulator 113. Since the inner conductor 112 of the plug has a notch 112a, the inner cable conductor 31 is partially exposed through the notch 112a, so that the sealant can enter the inner conductor 112 of the plug. After curing, the inner cable conductor 31 and the inner conductor 112 of the plug are fixed at the same time.

[0032] Next, the plug outer conductor 111 is welded and fixed to the outer cable conductor 33 through the solder hole 111d.

[0033] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, a partition 114 is also provided inside the outer conductor 111 of the plug. The partition 114 is located between the potting hole 111c and the solder hole 111d, dividing the space inside the outer conductor 111 of the plug into two parts, thereby separating the potting compound from the solder.

[0034] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, the spacer 114 is annular and is directly fitted onto the inner insulation layer 32 of the cable and abuts against the outer cable conductor 33, so as to keep the position of the spacer 114 during installation and insertion.

[0035] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, a coating layer is formed at the connection between the cable and the plug 1 by a vulcanization process to seal the outlet of the plug 1 and to achieve final fixation.

[0036] Figure 9 This diagram shows the structure of the socket 2 of the present invention. Figure 9In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, the socket 2 further includes a socket inner core 22 and a socket housing 23. The socket housing 23 is a cylindrical rotating body with an internal cavity to accommodate the socket inner core 22. The socket inner core 22 is an insulating component and is disposed between the socket housing 23 and the socket electrode pin 21 to achieve mutual insulation and fixation between the two.

[0037] In this application, the socket inner core 22 and the socket housing 23 are fixed in the same way as the plug 1. Both adopt the method of step surface and retaining ring to fix the socket inner core 22 between the step surface and the retaining ring. The plug 1 can be referred to, so it will not be described again.

[0038] Figure 10 One of the structural schematic diagrams of the socket electrode pin 21 of the present invention is shown. Figure 11 The second schematic diagram of the structure of the socket electrode pin 21 of the present invention is shown. The socket electrode pin 21 includes a socket outer conductor 211 and a socket inner conductor 212 that are insulated from each other. The socket outer conductor 211 and the socket inner conductor 212 are coaxial rotating bodies. The socket outer conductor 211 and the socket inner conductor 212 are used to transmit positive and negative current respectively. After the plug 1 and the socket 2 are inserted, the socket outer conductor 211 contacts the plug outer conductor 111 and conducts electricity, and the socket inner conductor 212 contacts the plug inner conductor 112 and conducts electricity.

[0039] In this application, the socket electrode pin 21 and the socket inner core 22 are fixed in the same way as the plug 1. The inner core 22 of the socket is fixed between the stepped surface and the snap ring by means of the step surface and snap ring. The plug 1 can be referred to, so it will not be described again.

[0040] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, the outer side of the socket housing 23 is also provided with a threaded opening 23a that mates with the nut 16.

[0041] In another embodiment of the coaxial structure watertight high-current connector provided by the present invention, a socket insulator 213 is provided between the socket outer conductor 211 and the socket inner conductor 212. The socket inner conductor 212, socket insulator 213 and socket outer conductor 211 are arranged sequentially from the inside to the outside. After the socket inner conductor 212 is inserted into the socket insulator 213 from the wire end, it is further restricted by the step surface. Similarly, after the socket insulator 213 is inserted into the socket outer conductor 211 from the wire end, it is further restricted by the step surface. In this way, the socket outer conductor 211 and socket inner conductor 212 are isolated from each other and coaxially fixed by the socket insulator 213.

[0042] In this application, the socket inner conductor 212, socket insulator 213 and socket outer conductor 211 of the socket electrode pin 21 are fixed in the same way as the plug electrode pin 11. They are fixed by step surface contact and sealing glue is poured into the potting hole and cured. The plug 1 can be referred to, so it will not be described again.

[0043] As a coaxial structure watertight high-current connector provided by the present invention, a sealing ring is also provided between the contact surfaces of adjacent components to achieve interface sealing according to sealing requirements, thereby achieving a waterproof effect.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A coaxial watertight high-current connector, comprising a plug and a socket for plug-in mating, characterized in that, The plug includes a plug housing and plug electrode pins fixed in the plug housing by a plug core. The plug electrode pins include an outer plug conductor and an inner plug conductor that are coaxially arranged and insulated from each other.

2. The coaxial structure watertight high-current connector according to claim 1, characterized in that, The inner conductor of the plug is fixed inside the outer conductor of the plug by a plug insulator.

3. The coaxial structure watertight high-current connector according to claim 1, characterized in that, It also includes a plug cable, wherein the cable consists of an inner cable conductor, an inner insulation layer, an outer cable conductor, and an outer insulation layer from the inside out. The end of the inner cable conductor protrudes beyond the outer cable conductor, and the end of the outer cable conductor protrudes beyond the outer insulation layer.

4. A watertight high-current connector with a coaxial structure according to claim 3, characterized in that, The outer conductor of the plug has a potting hole that extends into the interior. The potting hole corresponds to the terminal of the inner conductor of the plug. Sealant is poured into the potting hole to fix the outer conductor and the inner conductor of the plug.

5. A watertight high-current connector with a coaxial structure according to claim 4, characterized in that, The plug inner conductor has a notch. When the inner cable conductor is inserted into the terminal of the plug inner conductor, part of the inner cable conductor is exposed through the notch, allowing the sealant to penetrate into the plug inner conductor and simultaneously fix the plug inner conductor and the inner cable conductor.

6. A watertight high-current connector with a coaxial structure according to claim 4, characterized in that, The outer conductor of the plug has a through-hole on its side wall. When the inner cable conductor is inserted into the terminal of the inner conductor of the plug, the outer cable conductor is aligned with the through-hole, and the outer cable conductor and the outer conductor of the plug are fixed by welding through the through-hole.

7. A watertight high-current connector with a coaxial structure according to claim 6, characterized in that, The plug's outer conductor also has a partition inside, which is located between the solder hole and the glue-filling hole, dividing the internal space of the plug's outer conductor into a glue-filling cavity and a soldering cavity.

8. A watertight high-current connector with a coaxial structure according to claim 7, characterized in that, The spacer is ring-shaped, and it is fitted onto the inner insulation layer and abuts against the outer cable conductor.

9. A watertight high-current connector with a coaxial structure according to claim 1, characterized in that, The plug electrode pins are fixed in the plug core by a contact surface and a limiter that are offset along the axial direction, and the plug core is also fixed in the plug housing by a contact surface and a limiter that are offset along the axial direction.

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