Cable connection device

Abstract

This invention provides a cable connection device, including a connector body, a conductive connecting tube, and an inner conical pluggable terminal for connecting to a cable. The inner conical pluggable terminal includes a connector and a pin. The connector includes a support cylinder and several conductive plates, each conductive plate being disposed on the surface of the support cylinder, and the conductive plates covering the support cylinder to form the connector. One end of the pin is connected to the cable, and the other end is pluggably connected to the connector and electrically connected to the conductive plates. The conductive connecting tube is disposed inside the connector body, and its two ends are respectively connected to two connectors, realizing the electrical connection of the two ends of the cable through the pin and the connector. This cable connection device is highly practical and structurally reasonable. It not only enables a safe and reliable connection between the two ends of the cable but also facilitates the plugging, unplugging, installation, and disassembly of the cable at both ends, thereby improving the convenience of cable line fault diagnosis, cable installation, and cable maintenance.

Description

Technical Field

[0001] This invention relates to power cable accessories, and more specifically, to a cable connection device. Background Technology

[0002] In power cable engineering, the intermediate joint connection of the power system serves as a connecting device to connect the two ends of the cable into one unit. The cable connection device has an extremely wide range of applications and is a key product to ensure the correctness and reliability of electrical signal transmission.

[0003] Most existing cable connection devices use one-time fixed structures, which cannot be disassembled, making fault diagnosis of cable lines inconvenient. Troubleshooting cable lines using fixed connection devices requires a thorough inspection of the entire line, which is not only time-consuming but also significantly impacts users. Furthermore, the quality of cable conductor connections directly affects the safety and reliability of the cable system.

[0004] Therefore, at this stage, it is necessary to develop a convenient, pluggable, safe and reliable cable connection device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a cable connection device. This cable connection device is highly practical and has a reasonable structure. It can not only realize the safe and reliable connection of cables at both ends, but also facilitate the plugging and unplugging of cables at both ends, thereby improving the convenience of cable line fault diagnosis, cable installation, cable maintenance and other uses.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cable connection device, characterized in that it includes a connector body, a conductive connecting tube, and an inner conical pluggable terminal for connecting to a cable; the inner conical pluggable terminal includes a connector and a pin; the connector includes a support cylinder and several conductive plates, each conductive plate being disposed on the surface of the support cylinder, and the several conductive plates covering the support cylinder to form a connector; one end of the pin is connected to the cable, and the other end is pluggably connected to the connector and electrically connected to the conductive plate; the conductive connecting tube is disposed inside the connector body, and both ends are respectively connected to two connectors, thereby realizing the electrical connection of the two ends of the cable connected to the connectors via the pin.

[0007] In the above solution, the cables at both ends can achieve a safe and reliable electrical connection through the pins, connectors, and conductive connecting tubes of this invention. Furthermore, the pluggable connection between the cables at both ends and the connectors allows for a detachable connection, facilitating installation and disassembly. This greatly simplifies the replacement of the cables at both ends and the segmented identification of fault points, improving the convenience of cable line fault diagnosis, cable installation, and cable maintenance. In addition, this cable connection device is highly versatile and suitable for connecting cables of different voltage levels and cross-sections, thereby improving the stability, reliability, and safety of the cable connection operation.

[0008] The support cylinder is a cylindrical body, and several sets of positioning holes are evenly arranged on the surface of the support cylinder.

[0009] Each conductive sheet is provided with a positioning protrusion, and each conductive sheet is fixed to the surface of the support cylinder by engaging with the positioning hole through the positioning protrusion. The conductive sheet of the present invention can be stably connected to the support cylinder by engaging with the positioning hole through the positioning protrusion.

[0010] A boss is provided at one end of the support cylinder where it connects to the conductive connecting pipe; each conductive sheet is also provided with a positioning groove that engages with the boss. The design of the positioning groove can further improve the stability of the connection between the conductive sheet and the support cylinder.

[0011] Several conductive plates are provided on the surface of the support cylinder and protrude from both ends of the support cylinder. The protruding parts serve as electrical connection part one, which is electrically connected to the pin, and electrical connection part two, which is electrically connected to the conductive connecting tube.

[0012] Both electrical connection part one and electrical connection part two are mounting holes with arc-shaped hole walls. This design improves the effectiveness of electrical connections between the connector and the pins and conductive connecting tubes.

[0013] Each conductive sheet in the electrical connection part 1 is provided with a groove; after several conductive sheets cover the support cylinder, each groove closes together to form a slot located in the electrical connection part 1.

[0014] The pin consists of a connector and a cylindrical body. The cylindrical body has an inner hole for inserting a cable conductor. The connector has a barb structure, and the pin is inserted into the support cylinder and positioned by engaging with a slot through the barb structure. This method not only improves the stable positioning of the pin inside the support cylinder but also enhances the stability of the electrical connection between the pin and the conductive sheet, and facilitates the insertion and removal of the pin.

[0015] The cable conductor is inserted into the inner hole of the pin, and the cable conductor and the pin are integrated into a single structure through compression. The inner diameter of the inner hole can be adjusted according to the outer diameter of the cable, meaning that cables with different cross-sections can be connected by adjusting the inner hole. This invention can adapt to cables with different cross-sections by changing the size of the inner hole of the pin; that is, the cross-sections of the cables at both ends can be different, and even the voltage levels can be different.

[0016] The invention also includes a retaining ring for preventing the conductive sheet from spreading out; the retaining ring is sleeved on the outside of the conductive sheet. Specifically, the retaining ring is sleeved on the outside of electrical connection part one and electrical connection part two.

[0017] The present invention also includes an inner conical terminal rubber component and a tail tube sleeved on the cable; the inner conical terminal rubber component is inserted into the end of the connector body; the tail tube is connected to the end of the connector body and fixed by screws, and an O-ring for waterproof sealing is provided between the tail tube and the connector body.

[0018] The present invention also includes a waterproof sealing structure; the waterproof sealing structure includes a sealing sleeve, a clamping cone, and a clamping nut; the sealing sleeve covers the cable, the clamping nut is connected to the internal thread of the tail tube and clamps one end of the clamping cone, and the other end of the clamping cone abuts against the sealing sleeve, thereby achieving a tight gripping effect of the sealing sleeve on the cable. The sealing sleeve is an elastic rubber component, and the end of the clamping cone that abuts against the sealing sleeve is a flared end. This design increases the contact area between the clamping cone and the sealing sleeve, resulting in a better clamping effect.

[0019] The connector body contains an insulator and a high-voltage shielding tube arranged sequentially inside; the insulator covers the high-voltage shielding tube; the high-voltage shielding tube covers the inner conical plug-in terminal and the conductive connecting tube.

[0020] The connector body consists of a shell and a base connected together, with an O-ring for waterproof sealing provided between the shell and the base. The high-voltage shielding tube of this invention is used to uniformly distribute the complex electric field at the cut point of the cable insulation shielding layer. The insulator is an elastic rubber component with vibration damping properties.

[0021] The cable connection device of the present invention is assembled with the cable in the following manner:

[0022] (1) Place the conductive connecting tube into mold I and inject semi-conductive rubber (i.e., outer high-voltage shielding tube); after completion, place it into mold II and inject insulating rubber (i.e., outer insulating component); after completion, place it into the housing; cover it with the base; connect the housing and the base together with bolts to form a joint body. An O-ring is set at the interface between the housing and the base for waterproof sealing.

[0023] (2) After stripping the cables at both ends, put the clamping nut, clamping cone, sealing sleeve, tail tube and inner cone end rubber parts into the cables at both ends in sequence.

[0024] (3) The cables at both ends are inserted into the inner hole of the pin and pressed into a whole. The plug part of the pin is inserted into the connector (the hook structure makes it easy to enter but difficult to exit). The two connectors are respectively fitted into the protruding part inside the conductive connecting tube. Through this structure, the cables at both ends are connected to the conductive connecting tube, realizing the electrical connection of the two cables connected by the pin and the connector.

[0025] (4) Insert the inner conical end rubber part into the connector body, and fix the tail tube to the connector body with screws. Set an O-ring seal at the interface between the tail tube and the connector body for waterproof sealing.

[0026] (5) Insert the sealing sleeve and the clamping cone into the inner hole of the tail tube in sequence. Connect the clamping nut to the inner thread of the tail tube. Tighten the clamping nut to force the clamping cone to press against the sealing sleeve, so that the sealing sleeve deforms and hugs the outer sheath of the cable, thereby achieving waterproof sealing.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects: The cable connection device of the present invention is highly practical and has a reasonable structure. It can not only realize the safe and reliable connection of cables at both ends, but also facilitate the plugging and unplugging of cables at both ends, thereby improving the convenience of cable line fault diagnosis, cable installation, cable maintenance and other uses. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the cable connection device of the present invention;

[0029] Figure 2 This is a schematic diagram of the connector of the present invention connected to a cable and a conductive connecting tube;

[0030] Figure 3 This is a schematic diagram of the internal structure of the connector in the cable connection device of the present invention;

[0031] Figure 4 This is a top view of the connector in the cable connection device of the present invention;

[0032] Figure 5 This is a side view of the conductive sheet of the connector in the cable connection device of the present invention;

[0033] Figure 6 This is a front view of the conductive sheet of the connector in the cable connection device of the present invention;

[0034] Figure 7 This is a schematic diagram of the connector support cylinder in the cable connection device of the present invention;

[0035] Figure 8 This is a schematic diagram of the pin in the cable connection device of the present invention;

[0036] Among them, 1 is the connector body, 1.1 is the shell, 1.2 is the base, 2 is the conductive connecting pipe, 3 is the cable, 4 is the connector, 5 is the support cylinder, 5.1 is the positioning hole, 5.2 is the boss, 6 is the conductive sheet, 6.1 is the positioning protrusion, 6.2 is the positioning slot, 6.3 is the groove, 7 is the pin, 7.1 is the insertion part, 7.1.1 is the first conical part, 7.1.2 is the first cylindrical part, 7.1.3 is the second conical part, 7.1.4 is the second cylindrical part, 7.2 is the cylinder, 7.3 is the inner hole, 8 is the snap ring, 9 is the inner conical end rubber part, 10 is the tail tube, 11 is the sealing sleeve, 12 is the clamping cone, 13 is the clamping nut, 14 is the insulator, 15 is the high-voltage shielding tube, and 16 is the hole wall. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] Example

[0039] like Figures 1 to 8 As shown, the cable connection device of the present invention includes a connector body 1, a conductive connecting tube 2, and an inner conical pluggable terminal for connecting to a cable 3. The inner conical pluggable terminal includes a connector 4 and a pin 7. The connector 4 has a symmetrical structure and includes a support cylinder 5 and eight conductive plates 6. Each conductive plate 6 is disposed on the surface of the support cylinder 5, and the eight conductive plates 6 cover the support cylinder 5 to form the connector 4. One end of the pin 7 is connected to the cable 3, and the other end is pluggably connected to the connector 4 and electrically connected to the conductive plate 6. The conductive connecting tube 2 of the present invention is disposed inside the connector body 1, and its two ends are respectively connected to two connectors 4, realizing the electrical connection of the two ends of the cable 3 connected to the connectors 4 via the pin 7.

[0040] The support cylinder 5 of this invention is a cylindrical body. A plurality of positioning holes 5.1 are evenly distributed on the surface of the support cylinder 5. Each conductive sheet 6 is provided with a positioning protrusion 6.1. Each conductive sheet 6 is positioned on the surface of the support cylinder 5 by engaging the positioning protrusion 6.1 with the positioning hole 5.1. Furthermore, a boss 5.2 is provided at the end of the support cylinder 5 connected to the conductive connecting pipe 2. Each conductive sheet 6 is also provided with a positioning groove 6.2 that engages with the boss 5.2. This positioning groove 6.2 design further improves the stability of the connection between the conductive sheet 6 and the support cylinder 5.

[0041] The present invention provides eight conductive plates 6 on the surface of the support cylinder 5 that protrude from both ends of the support cylinder 5. The protruding portions serve as an electrical connection part one that is electrically connected to the pin 7 and an electrical connection part two that is electrically connected to the conductive connecting tube 2. This design can improve the effectiveness of the electrical connection between the connector 4 and the pin 7 and the conductive connecting tube 2.

[0042] In the electrical connection section one, each conductive sheet 6 is provided with a groove 6.3. After the eight conductive sheets 6 cover the support cylinder 5, each groove 6.3 closes together to form a slot in the electrical connection section one. The pin 7 is composed of a plug-in part 7.1 and a cylinder 7.2 connected together. The cylinder 7.2 is provided with an inner hole 7.3 for inserting the cable 3. The plug-in part 7.1 is composed of a first conical part 7.1.1, a first cylindrical part 7.1.2, a second conical part 7.1.3, and a second cylindrical part 7.1.4 connected together. The second cylindrical part 7.1.4 is connected to the cylinder 7.2. The maximum outer diameter of the second conical part 7.1.3 is larger than the outer diameter of the second cylindrical part 7.1.4, that is, the second conical part 7.1.3 forms a barb structure. The pin 7 is inserted into the support cylinder 5 and is positioned by engaging with the slot through the barb structure. This method not only improves the stable positioning of the pin 7 inside the support cylinder 5, but also improves the stability of the electrical connection between the pin 7 and the conductive sheet 6, and facilitates the insertion and removal of the pin 7.

[0043] During cable 3 installation, the diameter of cable 3 is slightly smaller than the inner diameter of the inner hole 7.3 of the plug 7. Cable 3 is inserted into the inner hole 7.3 of the plug 7, and the cable 3 and the plug 7 are integrated through compression, thus transforming cable 3 into a conductor with a tapered end. The inner diameter of the inner hole 7.3 of this invention can be adjusted according to the outer diameter of cable 3, meaning that cables 3 with different cross-sections can be connected by adjusting the inner hole 7.3. This invention can adapt to cables 3 with different cross-sections by changing the size of the inner hole 7.3 of the plug 7; that is, the cross-sections of the cables 3 at both ends can be different, and even the voltage levels can be different.

[0044] The present invention also includes a retaining ring 8 for preventing the conductive sheet 6 from spreading out. The retaining ring 8 is sleeved on the outside of the connector 4. Specifically, the retaining ring 8 is sleeved on the outside of the electrical connection part one and the electrical connection part two of the conductive sheet 6. Both the electrical connection part one and the electrical connection part two are mounting holes, and the hole wall 16 of the mounting hole is an arc-shaped hole wall. In the present invention, the hole wall 16 of the mounting hole is an arc-shaped hole wall, so the inner hole profile of the mounting hole is not a straight line. When a straight mounting hole is connected to the outer cylinder of the pin 7 or the conductive connecting tube 2, a clearance fit (no contact) or an interference fit (difficult assembly) will occur. However, since the inner hole profile of the mounting hole of the present invention is an arc, when the mounting hole with the arc-shaped hole wall 16 is connected to the outer cylinder of the pin 7 or the conductive connecting tube 2, there will definitely be a partial interference fit to ensure contact. However, since the length of the interference fit is not long, the assembly difficulty is reduced. This design can improve the effectiveness of the electrical connection between the connector 4 and the pin 7 and the conductive connecting tube 2.

[0045] The present invention also includes an inner conical terminal rubber component 9 and a tail tube 10 sleeved on the cable 3, wherein the inner conical terminal rubber component 9 is inserted into the end of the connector body 1, the tail tube 10 is connected to the end of the connector body 1 and fixed by screws, and an O-ring for waterproof sealing is provided between the tail tube 10 and the connector body 1.

[0046] The present invention also includes a waterproof sealing structure, which comprises a sealing sleeve 11, a clamping cone 12, and a clamping nut 13. The sealing sleeve 11 covers the cable 3. The clamping nut 13 is threadedly connected to the tail tube 10 and clamps one end of the clamping cone 12. The other end of the clamping cone 12 abuts against the sealing sleeve 11, thus securing the cable 3 tightly. The sealing sleeve 11 is an elastic rubber component, and the end of the clamping cone 12 that abuts against the sealing sleeve 11 has a flared end. This design increases the contact area between the clamping cone 12 and the sealing sleeve 11, resulting in a better clamping effect.

[0047] The connector body 1 of this invention contains an insulator 14 and a high-voltage shielding tube 15 arranged sequentially inside. The insulator 14 covers the high-voltage shielding tube 15, and the high-voltage shielding tube 15 covers the inner conical plug-in terminal and the conductive connecting tube 2. The connector body 1 is composed of a shell 1.1 and a base 1.2 connected together, with an O-ring for waterproof sealing provided between the shell 1.1 and the base 1.2. The high-voltage shielding tube 15 of this invention is used to uniformly distribute the complex electric field at the cut point of the cable 3 insulation shielding layer. The insulator 14 is an elastic rubber component with vibration damping function.

[0048] The cable connection device of the present invention is assembled with the cable 3 as follows:

[0049] (1) Place the conductive connecting tube 2 into mold I and inject semi-conductive rubber (i.e., outer high-voltage shielding tube 15); after completion, place it into mold II and inject insulating rubber (i.e., outer insulating component 14); after completion, place the housing 1.1 in; cover with the base 1.2; connect the housing 1.1 and the base 1.2 together with bolts to form a joint body 1. An O-ring is provided at the interface between the housing 1.1 and the base 1.2 for waterproof sealing.

[0050] (2) After stripping the cables 3 at both ends, insert the inner cone terminal rubber part 9, tail tube 10, sealing sleeve 11, clamping cone 12 and clamping nut 13 into the cables 3 at both ends in sequence.

[0051] (3) The cables 3 at both ends are inserted into the inner hole 7.3 of the pin 7 and are pressed into a whole. The insertion part 7.1 of the pin 7 is inserted into the connector 4 (the barb structure makes it easy to enter but difficult to exit). The two connectors 4 are respectively fitted into the protruding part inside the conductive connecting tube 2. Through this structure, the cables 3 at both ends are connected to the conductive connecting tube 2, realizing the electrical connection of the two cables 3 connected to the connector 4 through the pin 7.

[0052] (4) Insert the inner cone end rubber part 9 into the connector body 1. The tail tube 10 is fixed to the connector body 1 by screws. An O-ring is set at the interface between the tail tube 10 and the connector body 1 for waterproof sealing.

[0053] (5) Insert the sealing sleeve 11 and the clamping cone 12 into the inner hole of the tail tube 10 in sequence. Connect the clamping nut 13 to the inner thread of the tail tube 10. Tighten the clamping nut 13 to force the clamping cone 12 to press against the sealing sleeve 11, so that the sealing sleeve 11 deforms and hugs the outer sheath of the cable 3, thereby achieving waterproof sealing.

[0054] The two cables 3 at both ends can achieve a safe and reliable electrical connection through the pins 7, connectors 4, and conductive connecting tubes 2 of this invention. Furthermore, the plug-and-play connection between the two cables 3 and the connectors 4 via the pins 7 creates a detachable connection, facilitating installation and disassembly. This greatly simplifies the replacement of the two cables 3 and the segmented identification of fault points, improving the convenience of cable line fault diagnosis, cable installation, and cable maintenance. In addition, this cable connection device is highly versatile, suitable for connecting cables 3 of different voltage levels and cross-sections, thereby improving the stability, reliability, and safety of the cable 3 connection operation.

[0055] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A cable connection device, characterized in that: The device includes a connector body, a conductive connecting tube, and an inner conical pluggable terminal for connecting to a cable. The inner conical pluggable terminal includes a connector and a pin. The connector includes a support cylinder and several conductive plates, each conductive plate being disposed on the surface of the support cylinder, and the conductive plates covering the support cylinder to form a connector. One end of the pin is connected to the cable, and the other end is pluggably connected to the connector and electrically connected to the conductive plates. The conductive connecting tube is disposed inside the connector body, and its two ends are respectively connected to two connectors, realizing the electrical connection of the two ends of the cable connected to the connectors via the pin. The pin is composed of a plug-in part and a cylindrical body; the cylindrical body is provided with an inner hole for inserting a cable conductor; the plug-in part is provided with a barb structure, and the pin is inserted into the support cylinder and positioned by engaging with the slot through the barb structure; The support cylinder is a cylindrical body, and several sets of positioning holes are evenly arranged on the surface of the support cylinder; each conductive sheet is provided with a positioning protrusion, and each conductive sheet is set on the surface of the support cylinder by the positioning protrusion and the positioning hole. Several conductive plates are provided on the surface of the support cylinder and protrude from both ends of the support cylinder. The protruding parts serve as electrical connection part one, which is electrically connected to the pin, and electrical connection part two, which is electrically connected to the conductive connecting tube. Both the electrical connection part one and the electrical connection part two are mounting holes, and the hole walls of the mounting holes are arc-shaped. Each conductive sheet in the electrical connection part 1 is provided with a groove; after several conductive sheets cover the support cylinder, each groove closes together to form a slot located in the electrical connection part 1. The cable conductor is inserted into the inner hole of the pin, and the cable conductor and the pin are integrated into a single structure by means of compression. It also includes a retaining ring for preventing the conductive sheet from spreading out; the retaining ring is sleeved on the outside of the conductive sheet.

2. The cable connection device according to claim 1, characterized in that: The support cylinder is provided with a boss at one end where it is connected to the conductive connecting pipe; each conductive sheet is also provided with a positioning slot that is engaged with the boss.

3. The cable connection device according to claim 1, characterized in that: It also includes an inner conical terminal rubber component and a tail tube sleeved on the cable; the inner conical terminal rubber component is inserted into the end of the connector body; the tail tube is connected to the end of the connector body and fixed by screws, and an O-ring seal for waterproof sealing is provided between the tail tube and the connector body.

4. The cable connection device according to claim 1, characterized in that: It also includes a waterproof sealing structure; the waterproof sealing structure includes a sealing sleeve, a clamping cone, and a clamping nut; the sealing sleeve covers the cable, the clamping nut is connected to the internal thread of the tail tube and clamps one end of the clamping cone, and the other end of the clamping cone abuts against the sealing sleeve, so that the sealing sleeve tightly holds the cable.

5. The cable connection device according to claim 1, characterized in that: The connector body contains an insulator and a high-voltage shielding tube arranged sequentially inside; the insulator covers the high-voltage shielding tube; the high-voltage shielding tube covers the inner conical plug-in terminal and the conductive connecting tube. The connector body is composed of a shell and a base connected together, and an O-ring is provided between the shell and the base for waterproof sealing.

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