An overhead conductor fastening device and method of use thereof

Abstract

The application discloses an overhead conductor quick connecting device and a use method thereof, and belongs to the power distribution network repair tool. The connecting device comprises an insulating cylinder, a driving mechanism and two conductive wedge tightening assemblies. The insulating cylinder has a mounting cavity and two conical cavities. The two conductive wedge tightening assemblies are symmetrically arranged in the two conical cavities. Each conductive wedge tightening assembly comprises an elastic member and at least three wedge-shaped clamping pieces with piercing teeth. The wedge-shaped clamping pieces surround to form a conical body with a conical insertion hole, and the narrow end of the conical body faces the narrow end of the conical cavity. One end of the elastic member is embedded in the annular groove formed at the wide end of the wedge-shaped clamping piece. Two overhead conductors can be inserted into the corresponding conical insertion hole from the narrow end of the corresponding conical cavity. The driving mechanism can drive the two elastic members to move away from each other, drive the wedge-shaped clamping pieces to move axially along the conical cavity to clamp the overhead conductor, and at the same time, the piercing teeth are pierced into the conductor to complete the electrical contact. The application can realize the skin-free, active clamping and quick operation of the conductor connection.

Description

Technical Field

[0001] This invention relates to the field of power distribution network emergency repair tools, and in particular to a rapid connection device for overhead conductors and its usage method. Background Technology

[0002] During the long-term operation of power distribution networks, overhead conductors are highly susceptible to wire breakage due to natural environmental factors and external human influences. Lightning strikes and external damage are the main causes of conductor breakage accidents. These breakages not only disrupt regional power supply, affecting residents' lives and businesses' electricity consumption, but also reduce the stability and reliability of the power distribution network. To quickly restore power and minimize outage losses, rapid repair work after a wire breakage is a crucial aspect of power distribution network operation and maintenance. Conductor splicing devices are an indispensable core tool in these repair operations, and their ease of use and connection stability directly determine repair efficiency and the subsequent operational safety of the line. Currently, conventional splicing structures mostly employ passive clamping and fixing methods, making it difficult to achieve active opening and closing control of the clamping components. The assembly process heavily relies on manual alignment and fixing, resulting in a low degree of automation.

[0003] To address the aforementioned issues, existing technology CN206237117U discloses a steel-cored aluminum stranded wire connector for ultra-high voltage transmission lines. This connector primarily employs a conical self-locking structure with a tapered sleeve and wedge block, supplemented by a spring to provide clamping force, thereby achieving conductor clamping. Before assembly, the conductor requires pretreatment, including stripping the insulation layer and machining the steel core clamp. Overall assembly relies on manual alignment and assembly, supplemented by pins for limiting and fixing. However, this connector cannot directly complete the splicing of insulated wires without damaging the original insulation layer of the wires. Before construction, workers still need to perform tedious pre-treatment operations such as stripping the insulation of the wires and processing the end clips. The construction process is complicated and the workload is large. At the same time, the connector only relies on the conical structure and spring for passive clamping and does not have the ability to actively open and close the wedge. The clamping force and opening and closing stroke cannot be actively adjusted. The entire clamping and assembly process can only rely on manual alignment and assembly to complete the positioning and fixation. It is highly dependent on human intervention and has poor structural controllability.

[0004] Therefore, there is an urgent need to propose a rapid splicing device for overhead conductors with an insulation piercing structure and its usage method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid overhead conductor splicing device and its usage method, so as to achieve conductor splicing without stripping, active clamping and rapid operation, thereby improving the efficiency and splicing quality of power distribution network outage repair.

[0006] Based on the above concept, the technical solution adopted by this invention is as follows: A quick-connection device for overhead conductors includes: An insulating cylinder has an internal mounting cavity and a conical cavity connected to both ends of the mounting cavity. The inner diameter of each conical cavity gradually decreases in the direction away from the mounting cavity. Two conductive wedge clamping assemblies are symmetrically arranged in the two conical cavities. Each conductive wedge clamping assembly includes an elastic element and at least three wedge-shaped clips. The wedge-shaped clips are circumferentially enclosed to form a conical body with a conical insertion hole. The conical body tapers towards the narrow end of the conical cavity. An arc-shaped groove is formed on the inner wall of the end of each wedge clip away from the narrow end. All the arc-shaped grooves are joined together to form an annular groove. One end of the elastic element is embedded in the annular groove. Several piercing teeth are provided on the inner side of each wedge clip. Two overhead wires can be inserted into the corresponding conical sockets from the narrow ends of the two conical cavities, one to one; A driving mechanism, disposed within the mounting cavity, is capable of driving the two elastic elements to move closer or further apart, thereby causing the two sets of wedge-shaped clips to move axially within the corresponding conical cavities, thereby radially loosening or clamping the corresponding overhead conductors, and causing the piercing teeth to penetrate the corresponding overhead conductors for electrical contact.

[0007] Furthermore, the mounting cavity is a square cavity, and each conductive wedge assembly further includes a sliding plate. The sliding plate is slidably disposed in the mounting cavity along a first direction and connected to the corresponding elastic element. The driving mechanism includes a transmission shaft and two transmission components. Each transmission component includes a gear and two racks. One end of the transmission shaft is rotatably connected to the insulating cylinder, and the other end passes through the mounting cavity and out of the outer wall of the insulating cylinder along a second direction. The two transmission components are spaced apart along the second direction. The gear is fixedly sleeved on the transmission shaft. The two racks mesh with the opposite sides of the gear along a third direction and are correspondingly slidably connected to the opposite sides of the mounting cavity along the third direction. The two racks are correspondingly connected to the two sliding plates. The first direction, the second direction, and the third direction are perpendicular to each other.

[0008] Furthermore, the outer wall of the insulating cylinder is provided with a fitting groove, and the protruding end of the drive shaft has a non-circular cross-section connecting part. The connecting part is located in the fitting groove. The fitting groove is used to install a locking limit member. The locking limit member is provided with a sleeve hole that matches the connecting part, and the outer edge of the locking limit member forms a circumferential limiting fit with the inner wall of the fitting groove.

[0009] Furthermore, the mounting cavity is provided with sliding grooves extending along the first direction on both sides opposite to each other along the second direction, and each sliding plate is provided with a sliding part on both sides opposite to each other along the second direction, with the two sliding parts corresponding to each other and slidingly disposed in the two sliding grooves.

[0010] Furthermore, the insulating cylinder includes a main cylinder, a first cylinder, and two second cylinders. The main cylinder has an axially penetrating inner cavity. The first cylinder is installed in the inner cavity. The mounting cavity is opened in the first cylinder. The two second cylinders are respectively disposed at both ends of the first cylinder and are both installed in the inner cavity. The conical cavity is opened in the corresponding second cylinder.

[0011] Furthermore, the overhead conductor quick splicing device also includes two sealing covers, which are detachably connected to both ends of the main cylinder. Each sealing cover includes an inner cover plate and a sealing ring. The second cylinder has an annular fitting groove at one end away from the first cylinder. The inner cover plate has a wire hole for the overhead conductor to pass through, and the wire hole is pre-filled with anti-arc insulating silicone grease. The inner cover plate has a groove on one side facing the second cylinder, and the sealing ring is located at the bottom of the groove. The inner cover plate is screwed to the inner wall of the corresponding end of the main cylinder and inserted into the annular fitting groove on the corresponding side, while the second cylinder is inserted into the groove and abuts against the sealing ring.

[0012] Furthermore, each inner cover plate is fixedly fitted with an outer cover plate on its outer wall, and an annular groove is opened on one side facing the main cylinder. When the inner cover plate is screwed to the inner wall of the main cylinder, the end of the main cylinder is inserted into the annular groove.

[0013] Furthermore, the inner cover plate has an extension protruding at one end away from the main cylinder, and the wire hole passes through the extension.

[0014] Furthermore, the outer wall of the insulating cylinder is provided with an observation window that connects to the mounting cavity.

[0015] The method of using the overhead conductor quick splicing device, applicable to the above-mentioned overhead conductor quick splicing device, includes: S1. Use a cutting tool to trim the ends of the two overhead wires flat and wipe the dirt off the surface of the wire ends; S2. Operate the drive mechanism to bring the two elastic elements closer together, causing the two sets of wedge-shaped clips to move along the conical cavity away from the narrow end, thus opening the conical insertion hole. S3. Insert the two overhead wires into the corresponding conical sockets from the narrow ends of the two conical cavities respectively; S4. Operate the drive mechanism to move the two elastic elements away from each other, causing the two sets of wedge-shaped clips to move along the conical cavity toward the narrow end. The wedge-shaped clips contract radially under the pressure of the inner wall of the conical cavity, causing the piercing teeth to penetrate the corresponding overhead conductors to form electrical contact.

[0016] The beneficial effects of this invention are: The overhead conductor quick splicing device proposed in this invention uses a symmetrically arranged conical cavity inside an insulating cylinder in conjunction with a conductive wedge clamping assembly. A driving mechanism is introduced to actively control the elastic element to drive the wedge clamping piece to move axially. When the wedge clamping piece moves towards the narrow end of the conical cavity under the action of the driving mechanism, it is radially squeezed by the inner wall of the conical cavity, and the wedge clamping piece contracts radially inward, thereby achieving active radial clamping of the overhead conductor. Conversely, when the wedge clamping piece moves towards the wide end, the radial constraint of the inner wall of the conical cavity on the wedge clamping piece is gradually released, and the wedge clamping piece opens radially with the assistance of the elastic element, thereby releasing the overhead conductor. The conical surface fit and active drive mechanism enable controllable adjustment of clamping force and opening / closing stroke, solving the problems of passive clamping structures in existing technologies, such as the inability to actively control opening and closing, the inability to adjust clamping force and stroke, and the high dependence on manual alignment during assembly. Simultaneously, each wedge-shaped clamp has piercing teeth on its inner side, allowing it to directly penetrate the overhead conductor during clamping to complete electrical contact, eliminating the need for pre-treatment operations such as stripping the conductor's insulation or processing end clips. This simplifies the construction process, reduces workload, and enables rapid splicing without damaging the conductor's original insulation, further enhancing the device's automation and structural controllability. Furthermore, when the line is under tension, the pull-back force of the overhead conductor drives the wedge-shaped clamp to slide deeper into the conical cavity, generating a greater radial clamping force. This means that the greater the tension in the overhead conductor, the greater the contact pressure between the piercing teeth and the core wire, the lower the contact resistance, and the more stable the electrical performance.

[0017] The method of using the overhead conductor quick splicing device proposed in this invention is simple and intuitive, with low skill requirements for operators. Actual operation verification shows that the splicing time can be shortened to less than 5 minutes, improving the efficiency and splicing quality of power distribution network line breakage repair. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overhead conductor quick splicing device provided in an embodiment of the present invention; Figure 2 This is a top view of the overhead conductor quick splicing device provided in an embodiment of the present invention; Figure 3 yes Figure 1 Enlarged view of point A in the middle; Figure 4 This is a side view of the drive mechanism provided in an embodiment of the present invention; Figure 5This is a top view of the transmission assembly provided in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the wedge clip assembly provided in the embodiment of the present invention.

[0019] In the picture: 1. Insulating cylinder; 101. Mounting cavity; 1011. Slide groove; 1012. Slide track; 102. Conical cavity; 103. Observation window; 104. Fitting slot; 11. Main cylinder; 12. First cylinder; 13. Second cylinder; 130. Annular fitting groove; 2. Conductive wedge clamping assembly; 21. Elastic element; 22. Wedge-shaped clamp; 2201. Conical insertion hole; 2202. Annular groove; 221. Piercing tooth; 23. Slide plate; 3. Drive mechanism; 31. Drive shaft; 32. Transmission assembly; 321. Gear; 322. Rack; 4. Sealing cover; 41. Inner cover plate; 411. Extension; 410. Wire hole; 42. Sealing ring; 43. Outer cover plate; 100. Overhead conductors. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] See Figures 1 to 6 This invention proposes a rapid splicing device for overhead conductors, comprising an insulating cylinder 1, two conductive wedge clamping assemblies 2, and a driving mechanism 3. The insulating cylinder 1 has an installation cavity 101 and conical cavities 102 connecting its two ends. The inner diameter of each conical cavity 102 gradually decreases in the direction away from the installation cavity 101. The two conductive wedge clamping assemblies 2 are symmetrically arranged within the two conical cavities 102. Each conductive wedge clamping assembly 2 includes an elastic element 21 and at least three wedge-shaped clamps 22. The wedge-shaped clamps 22 circumferentially enclose a conical body with a conical insertion hole 2201. The conical body narrows towards the narrow end of the conical cavity 102. Each wedge clamp 22... An arc-shaped groove is provided on the inner wall of one end, and all the arc-shaped grooves are joined together to form an annular groove 2202. One end of the elastic element 21 is embedded in the annular groove 2202. Several piercing teeth 221 are provided on the inner side of each wedge-shaped clamp 22. The two overhead wires 100 can be inserted into the corresponding conical insertion holes 2201 from the narrow ends of the two conical cavities 102 in a one-to-one correspondence. The driving mechanism 3 is provided in the mounting cavity 101 and can drive the two elastic elements 21 to move closer or further away from each other, so as to drive the two sets of wedge-shaped clamps 22 to move axially in the corresponding conical cavities 102, so as to radially loosen or clamp the corresponding overhead wires 100, and make the piercing teeth 221 pierce into the corresponding overhead wires 100 for electrical contact.

[0026] By employing a symmetrically arranged conical cavity 102 inside the insulating cylinder 1 in conjunction with the conductive wedge clamping assembly 2, and introducing a driving mechanism 3 to actively control the elastic element 21 to drive the wedge clamp 22 to move axially, when the wedge clamp 22 moves towards the narrow end of the conical cavity 102 under the action of the driving mechanism 3, it is radially squeezed by the inner wall of the conical cavity 102, and the wedge clamp 22 contracts radially inward, thereby achieving active radial clamping of the overhead conductor 100; conversely, when the wedge clamp 22 moves towards the wide end, the radial constraint of the inner wall of the conical cavity 102 on the wedge clamp 22 is gradually released, and the wedge clamp 22 opens radially with the assistance of the elastic element 21, thereby loosening the overhead conductor 100. The conical surface fit and active drive mechanism enable controllable adjustment of clamping force and opening / closing stroke, solving the problems of passive clamping structures in existing technologies, such as the inability to actively control opening and closing, the inability to adjust clamping force and stroke, and the high dependence on manual alignment during assembly. Simultaneously, each wedge-shaped clamp 22 has piercing teeth 221 on its inner side, which can directly pierce the overhead conductor 100 during clamping to complete electrical contact, eliminating the need for pre-treatment operations such as stripping the insulation layer of the conductor or processing end clips. This simplifies the construction process, reduces workload, and enables rapid splicing without damaging the original insulation layer of the conductor, further improving the automation level and structural controllability of the device. Furthermore, when the line is under tension, the pull-back force of the overhead conductor 100 drives the wedge-shaped clamp 22 to slide deeper into the conical cavity, generating a greater radial clamping force. This means that the greater the tension on the overhead conductor 100, the greater the contact pressure between the piercing teeth 221 and the core wire, the lower the contact resistance, and the more stable the electrical performance.

[0027] In this embodiment, see Figure 6 Each conductive wedge clamping assembly 2 includes three wedge-shaped clips 22, which are uniformly arranged circumferentially to form a cone with a conical insertion hole 2201. Each wedge-shaped clip 22 has an arc-shaped groove on its inner wall at the end furthest from the narrow opening of the conical cavity 102. When the three wedge-shaped clips 22 are joined circumferentially, the arc-shaped grooves align to form a complete annular groove 2202. One end of the elastic element 21 is embedded in this annular groove 2202. Because the groove is a closed annular structure, it effectively restricts the radial movement of the elastic element 21, ensuring that the elastic element 21 will not come out of the gap between the three wedge-shaped clips 22, thus improving the operational reliability of the assembly. When the overhead conductor 100 is dynamically inserted, the end of the conductor pushes open the wedge-shaped clamp 22. Each wedge-shaped clamp 22 overcomes the elastic force of the elastic element 21 and moves radially outward and opens. At this time, the wedge-shaped clamp 22 is in a "floating" state and can automatically adjust the center according to the actual position of the conductor, thereby adapting to the slight bending deformation or diameter manufacturing deviation of the conductor, realizing floating compensation, and ensuring uniform clamping and reliable contact.

[0028] In this embodiment, conductive grease is applied between the outer circumferential surface of the wedge-shaped clamp 22 and the inner wall of the conical cavity 102. On the one hand, the lubricating effect of the grease reduces the frictional resistance of the wedge-shaped clamp 22 during axial movement, making the control of the clamping force by the drive mechanism 3 more sensitive and smooth, while reducing wear on the contact surface and extending the service life of the device. On the other hand, the conductive particles in the conductive grease can establish a stable electrical path between the wedge-shaped clamp 22 and the inner wall of the conical cavity 102, forming a complete current transmission channel with the aluminum alloy conductive liner, thereby improving the conductivity reliability and contact stability of the device.

[0029] In this embodiment, the inner wall of the wedge-shaped clip 22 is provided with several rows of staggered piercing teeth 221; the height of the piercing teeth 221 is greater than the insulation layer thickness of the 10kV overhead conductor 100, and the hardness of its material is greater than the hardness of the aluminum core of the conductor; the design height and hardness of the piercing teeth 221 enable them to reliably penetrate the 10kV insulation layer and directly contact the aluminum core, avoiding the on-site stripping process, protecting the core wire from damage and oxidation, and eliminating the problem of insulation restoration, thereby greatly improving the efficiency and convenience of on-site splicing operations while ensuring the reliability of electrical contact.

[0030] In this embodiment, the elastic element 21 is preferably a helical compression spring, and the annular groove 2202 is a trapezoidal groove. The trapezoidal groove has the characteristics of a narrow opening and a wide bottom, which can form an inverted snap-fit ​​with the end of the elastic element 21, effectively preventing the elastic element 21 from coming out of the gap of the wedge-shaped clamp 22 during movement, while providing a stable axial support surface for the elastic element 21, ensuring the uniformity and reliability of the elastic force transmission. In addition, the specific parameters of the elastic element 21, such as the elastic coefficient, free length, compression stroke, etc., can be selected as needed according to the wire diameter of the overhead conductor 100, the required clamping force, and the output characteristics of the drive mechanism 3. The above parameter selection is a conventional technical means in the art and will not be elaborated here.

[0031] Specifically, such as Figure 1 As shown, the insulating cylinder 1 includes a main cylinder 11, a first cylinder 12, and two second cylinders 13. The main cylinder 11 has an axially extending inner cavity. The first cylinder 12 is installed in the inner cavity, and an installation cavity 101 is formed in the first cylinder 12. The two second cylinders 13 are respectively located at both ends of the first cylinder 12 and are both installed in the inner cavity. A conical cavity 102 is formed in the corresponding second cylinder 13. By setting the insulating cylinder 1 as a split structure, it is beneficial to independently process and assemble each functional cavity, reducing manufacturing difficulty.

[0032] In this embodiment, the first cylinder 12 is located at the center of the main cylinder 11 along the axial direction.

[0033] In this embodiment, the main cylinder 11 is formed using a double-sided injection molding process. Its outer layer is made of high-strength, UV-resistant, and aging-resistant modified polycarbonate or reinforced nylon material, capable of withstanding a 10kV phase voltage. This ensures that no discharge or electric shock accidents will occur when maintenance personnel or external objects such as birds or branches accidentally come into contact with the outer shell. The inner layer of the main cylinder 11 is embedded with an aluminum alloy conductive liner for reliable current conduction. After installation, the current flows only between the internal wedge-shaped clips 22 and the aluminum alloy conductive liner. The external insulating shell provides complete safety protection, thereby ensuring the long-term safety and reliability of the overhead conductor quick-connection device in complex outdoor environments while achieving the electrical connection function.

[0034] In this embodiment, the main cylinder 11 is a cylindrical cylinder, the first cylinder 12 is a square cylinder, and the second cylinder 13 is a cylindrical cylinder. The three can be assembled and fixed by mature mechanical connection methods such as threaded connection, snap-fit ​​connection, keyway fit or interference fit. The specific structure will not be described in detail here.

[0035] Specifically, such as Figure 1 and Figure 2 As shown, an observation window 103 communicating with the installation cavity 101 is provided on the outer wall of the insulating cylinder 1. By providing an observation window 103 communicating with the installation cavity 101 on the outer wall of the insulating cylinder 1, the operator can directly observe the position of the internal drive mechanism 3, the clamping degree of the wedge-shaped clamp 22, and the compression of the elastic element 21 without disassembling the device. This facilitates on-site installation, debugging, and subsequent inspection and maintenance, and improves the convenience and safety of the operation.

[0036] Specifically, such as Figure 1 , Figure 3 and Figure 4As shown, the mounting cavity 101 is a square cavity. Each conductive wedge assembly 2 also includes a sliding plate 23. The sliding plate 23 is slidably disposed within the mounting cavity 101 along a first direction and connected to a corresponding elastic element 21. The drive mechanism 3 includes a transmission shaft 31 and two transmission assemblies 32. Each transmission assembly 32 includes a gear 321 and two racks 322. One end of the transmission shaft 31 is rotatably connected to the insulating cylinder 1, and the other end passes through the mounting cavity 101 along a second direction and extends out of the outer wall of the insulating cylinder 1. The two transmission assemblies 32 are spaced apart along the second direction. The gear 321 is fixedly sleeved on the transmission shaft 31. The two racks 322 mesh with the opposite sides of the gear 321 along a third direction and are correspondingly slidably connected to the opposite sides of the mounting cavity 101 along the third direction. The two racks 322 are correspondingly connected to the two sliding plates 23. The first direction, the second direction, and the third direction are perpendicular to each other. By setting the mounting cavity 101 as a square cavity, a stable guide plane is provided for the moving parts such as the sliding plates 23 and the racks 322. The drive mechanism 3 uses a transmission shaft 31 to drive the gear 321 to rotate, which in turn drives the racks 322 on both sides to move synchronously in opposite directions along the first direction. The linear motion is then transmitted to the wedge-shaped clamps 22 of the two sets of conductive wedge clamping components 2 through the slide plate 23 and the elastic element 21, realizing synchronous and symmetrical clamping or loosening control of the overhead wires 100 at both ends. This transmission structure is compact and has high power transmission efficiency. Moreover, the gear and rack meshing has a certain self-locking characteristic, which can maintain the current position after the drive mechanism 3 stops moving, avoiding accidental loosening of the wedge-shaped clamps 22 due to vibration or external force, further improving the stability of the clamping state and the overall reliability of the device.

[0037] In this embodiment, both gear 321 and rack 322 are made of stainless steel or high-hardness ceramic materials to ensure that no hysteresis loss is generated in a 10kV environment and that the mechanical strength is sufficient.

[0038] In this embodiment, the drive mechanism 3 is disposed within the mounting cavity 101 inside the insulating cylinder 1, and the mounting cavity 101 is pre-filled with long-lasting grease. The grease can continuously lubricate moving parts such as the drive shaft 31, gear 321, rack 322, and slide plate 23, reducing friction loss and wear, lowering the risk of mechanism jamming, and also playing a role in rust prevention and dust prevention, thereby extending the service life of the device and reducing the frequency of daily maintenance.

[0039] More specifically, such as Figure 1 and Figure 2As shown, the outer wall of the insulating cylinder 1 has a fitting groove 104, and the protruding end of the drive shaft 31 has a non-circular cross-section connecting part, which is located inside the fitting groove 104. The fitting groove 104 is used to install a locking limit member. The locking limit member has a sleeve hole that matches the connecting part, and the outer edge of the locking limit member forms a circumferential limiting fit with the inner wall of the fitting groove 104. This structure not only prevents the drive shaft 31 from rotating accidentally due to vibration or external force, but also ensures the long-term stability of the clamped state. At the same time, the detachable design of the locking limit member facilitates on-site operation and subsequent maintenance.

[0040] More specifically, such as Figure 1 and Figure 4 As shown, the mounting cavity 101 has grooves 1011 extending in the first direction on both sides opposite to each other along the second direction. Each slide plate 23 has a sliding part on both sides opposite to each other along the second direction, and the two sliding parts are slidably disposed in the two grooves 1011. By setting grooves 1011 extending in the first direction on both sides of the mounting cavity 101 and setting matching sliding parts on both sides of the slide plate 23, the precise guidance and smooth sliding of the slide plate 23 along the first direction are achieved, effectively limiting the swaying and jamming of the slide plate 23 during the movement, ensuring that the force transmitted by the drive mechanism 3 to the elastic element 21 and the wedge clamp 22 is accurate, thereby improving the reliability and consistency of the clamping and releasing actions.

[0041] More specifically, the mounting cavity 101 has two slide rails 1012 spaced apart along a second direction on both opposite sides along a third direction, and each slide rail 1012 extends along a first direction. Each rack 322 is slidably disposed within its corresponding slide rail 1012. By creating two slide rails 1012 spaced apart along a second direction on both sides of the mounting cavity 101 along a third direction, and allowing each rack 322 to slide independently within its corresponding slide rail 1012, it is effectively ensured that the multiple racks 322 do not interfere with each other during movement and all move precisely along the first direction. This avoids collisions or misalignments between the racks 322, thereby improving the meshing stability and transmission accuracy of the gear 321 and rack 322, and ensuring the synchronous and symmetrical drive of the two sets of conductive wedge clamping components 2.

[0042] In this embodiment, both the chute 1011 and the slide 1012 are formed on the inner wall of the first cylinder 12.

[0043] Specifically, such as Figure 1As shown, the overhead conductor quick splicing device also includes two sealing covers 4, which are detachably connected to the two ends of the main cylinder 11. Each sealing cover 4 includes an inner cover plate 41 and a sealing ring 42. The second cylinder 13 has an annular fitting groove 130 at the end opposite to the first cylinder 12. The inner cover plate 41 has a wire hole 410 for the overhead conductor 100 to pass through. The wire hole 410 is pre-filled with anti-arc insulating silicone grease. The inner cover plate 41 has a groove on the side facing the second cylinder 13. The sealing ring 42 is located at the bottom of the groove. The inner cover plate 41 is screwed to the inner wall of the corresponding end of the main cylinder 11 and inserted into the annular fitting groove 130 on the corresponding side. At the same time, the second cylinder 13 is inserted into the groove and abuts against the sealing ring 42. By setting detachable sealing covers 4 at both ends of the device, pre-filling the wire hole 410 with anti-arc insulating silicone grease, and setting a sealing ring 42 between the inner cover plate 41 and the second cylinder 13, effective sealing of the overhead wire 100 entry point and isolation of the internal cavity of the device from the external environment are achieved, thereby preventing moisture, dust and dirt from entering, while suppressing internal lubricant leakage and corona discharge, improving the device's moisture-proof, dust-proof and anti-arc performance, ensuring the safety and reliability of long-term outdoor operation, and the detachable design of the sealing cover 4 facilitates on-site installation and subsequent maintenance.

[0044] More specifically, each inner cover plate 41 has an outer cover plate 43 fixedly fitted on its outer wall, and an annular groove is formed on the side facing the main cylinder 11. When the inner cover plate 41 is screwed onto the inner wall of the main cylinder 11, the end of the main cylinder 11 is inserted into the annular groove. By fixing the outer cover plate 43 on the outer wall of the inner cover plate 41 and forming an annular groove for the end of the main cylinder 11 to be inserted, a double sealing and mechanical protection structure is formed. This not only further prevents external moisture and dust from entering the device along the axial direction, but also enhances the mechanical strength of the end connection, preventing the sealing cover 4 from loosening or being damaged due to vibration or wire swing.

[0045] More specifically, the inner cover plate 41 has an extension 411 protruding from the end away from the main cylinder 11, and the wire hole 410 passes through the extension 411. This extension 411 increases the surface creepage distance between the exposed conductive part of the overhead wire 100 and the internal metal components of the device, and at the same time extends the moisture intrusion path, thereby improving the device's anti-flashover and anti-arc capabilities in humid environments such as rain, fog, and condensation, and ensuring the safe and stable operation of the line under adverse weather conditions.

[0046] In this embodiment, the extension 411 gradually contracts in a direction away from the main cylinder 11.

[0047] The present invention also provides a method of using an overhead conductor quick splicing device, applicable to the above-mentioned overhead conductor quick splicing device, comprising: S1. Use a cutting tool to trim the ends of the two sections of overhead conductor 100 flat and wipe the dirt off the surface of the conductor ends; S2. Operate the drive mechanism 3 to bring the two elastic elements 21 closer to each other, and drive the two sets of wedge-shaped clips 22 to move along the conical cavity 102 away from the narrow end; S3. Insert the two sections of overhead wire 100 into the corresponding conical sockets 2201 from the narrow ends of the two conical cavities 102 respectively; S4. Operate the drive mechanism 3 to move the two elastic elements 21 away from each other, and drive the two sets of wedge-shaped clips 22 to move along the conical cavity 102 toward the narrow end. The wedge-shaped clips 22 contract radially under the pressure of the inner wall of the conical cavity 102, so that the piercing teeth 221 pierce into the corresponding overhead wires 100 to form electrical contact.

[0048] The method of use provided by this invention is compatible with the above-mentioned overhead conductor quick splicing device. The operation steps are simple and intuitive, and the skill requirements for operators are low. Actual operation verification shows that the single splicing time can be shortened to less than 5 minutes, which improves the efficiency and splicing quality of power distribution network line breakage repair.

[0049] Specifically, in step S2, the transmission shaft 31 is rotated by an external tool, and the drive gear 321 drives the racks 322 on both sides and the corresponding slide plates 23 to move synchronously towards the middle of the mounting cavity 101 in the first direction, so that the two elastic elements 21 move closer to each other, and drive the two sets of wedge-shaped clips 22 to move away from the narrow end along the conical cavity 102, so that the conical insertion hole 2201 is in a normal state.

[0050] Specifically, in step S3, two neatly trimmed overhead conductors 100 are inserted through the conductor holes 410 of the two sealing covers 4, and then inserted into the corresponding conical insertion holes 2201 through the narrow end of the conical cavity 102; the insertion is stopped when the ends of the overhead conductors 100 on both sides appear in the observation window 103 and are aligned at the midpoint.

[0051] Specifically, in step S4, the transmission shaft 31 is rotated in the reverse direction, and the drive gear 321 drives the racks 322 on both sides and the corresponding sliding plates 23 to move synchronously towards both ends of the mounting cavity 101 in the first direction, so that the two elastic elements 21 move away from each other, and drive the two sets of wedge-shaped clips 22 to move towards the narrow end along the conical cavity 102; the wedge-shaped clips 22 gradually shrink under the radial compression of the inner wall of the conical cavity 102, so that the piercing teeth 221 forcefully penetrate the insulation layer of the overhead conductor 100 and deeply embed into the aluminum core, forming an electrical contact; when a significant operating resistance is felt and the transmission shaft 31 cannot be rotated further, it indicates that the initial electrical connection has been established; then, a locking limiter is installed on the fitting slot 104 to fix the position of the transmission shaft 31; when the line regains tension, the wedge-shaped clips 22 slide further towards the narrow end under the action of the self-locking principle, generating a secondary tightening force, realizing "the more you pull, the tighter it gets".

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A quick splicing device for overhead conductors, characterized in that, include: An insulating cylinder (1) has an internal mounting cavity (101) and a conical cavity (102) connected to both ends of the mounting cavity (101). The inner diameter of each conical cavity (102) gradually decreases in the direction away from the mounting cavity (101). Two conductive wedge clamping components (2) are symmetrically arranged in the two conical cavities (102). Each conductive wedge clamping component (2) includes an elastic element (21) and at least three wedge-shaped clips (22). The wedge-shaped clips (22) are circumferentially enclosed to form a conical body with a conical insertion hole (2201). The conical body narrows towards the narrow end of the conical cavity (102). Each wedge-shaped clip (22) has an arc-shaped groove on the inner wall of the end away from the narrow end. All the arc-shaped grooves are joined together to form an annular groove (2202). One end of the elastic element (21) is embedded in the annular groove (2202). Each wedge-shaped clip (22) has a number of piercing teeth (221) on its inner side. Two overhead wires (100) can be inserted into the corresponding conical sockets (2201) from the narrow ends of the two conical cavities (102) in a one-to-one correspondence; The driving mechanism (3) is located in the mounting cavity (101) and can drive the two elastic elements (21) to move closer or further apart, so as to drive the two sets of wedge-shaped clips (22) to move axially in the corresponding conical cavity (102) to radially loosen or clamp the corresponding overhead wire (100) and make the piercing teeth (221) pierce the corresponding overhead wire (100) for electrical contact.

2. The overhead conductor quick splicing device according to claim 1, characterized in that, The mounting cavity (101) is a square cavity. Each conductive wedge assembly (2) also includes a sliding plate (23). The sliding plate (23) is slidably disposed in the mounting cavity (101) along a first direction and connected to the corresponding elastic element (21). The driving mechanism (3) includes a transmission shaft (31) and two transmission components (32). Each transmission component (32) includes a gear (321) and two racks (322). One end of the transmission shaft (31) is rotatably connected to the insulating cylinder (1), and the other end passes through the insulating cylinder (1) along a second direction. The mounting cavity (101) extends through the outer wall of the insulating cylinder (1). The two transmission components (32) are spaced apart along the second direction. The gear (321) is fixedly sleeved on the transmission shaft (31). The two racks (322) mesh with the opposite sides of the gear (321) along the third direction and are correspondingly slidably connected to the opposite sides of the mounting cavity (101) along the third direction. The two racks (322) are correspondingly connected to the two slide plates (23). The first direction, the second direction and the third direction are perpendicular to each other.

3. The overhead conductor quick splicing device according to claim 2, characterized in that, The outer wall of the insulating cylinder (1) is provided with a fitting groove (104). The end of the transmission shaft (31) has a non-circular cross-section connecting part. The connecting part is located in the fitting groove (104). The fitting groove (104) is used to install a locking limit member. The locking limit member is provided with a sleeve hole that matches the connecting part. The outer edge of the locking limit member forms a circumferential limiting fit with the inner wall of the fitting groove (104).

4. The overhead conductor quick splicing device according to claim 2, characterized in that, The mounting cavity (101) is provided with sliding grooves (1011) extending along the first direction on both sides opposite to each other along the second direction. Each sliding plate (23) is provided with a sliding part on both sides opposite to each other along the second direction. The two sliding parts are slidably disposed in the two sliding grooves (1011) in a one-to-one correspondence.

5. The overhead conductor quick splicing device according to claim 1, characterized in that, The insulating cylinder (1) includes a main cylinder (11), a first cylinder (12) and two second cylinders (13). The main cylinder (11) has an axially penetrating inner cavity. The first cylinder (12) is installed in the inner cavity. The mounting cavity (101) is opened in the first cylinder (12). The two second cylinders (13) are respectively located at both ends of the first cylinder (12) and are both installed in the inner cavity. The conical cavity (102) is opened in the corresponding second cylinder (13).

6. The overhead conductor quick splicing device according to claim 5, characterized in that, The overhead conductor quick splicing device also includes two sealing covers (4), which are detachably connected to the two ends of the main cylinder (11). Each sealing cover (4) includes an inner cover plate (41) and a sealing ring (42). The second cylinder (13) has an annular fitting groove (130) at one end away from the first cylinder (12). The inner cover plate (41) has a wire hole (410) for the overhead conductor (100) to pass through. The wire hole (410) is pre-filled with anti-arc insulating silicone grease. The inner cover plate (41) has a groove on one side facing the second cylinder (13). The sealing ring (42) is located at the bottom of the groove. The inner cover plate (41) is screwed to the inner wall of the corresponding end of the main cylinder (11) and inserted into the annular fitting groove (130) on the corresponding side. At the same time, the second cylinder (13) is inserted into the groove and abuts against the sealing ring (42).

7. The overhead conductor quick splicing device according to claim 6, characterized in that, Each inner cover plate (41) is fixedly fitted with an outer cover plate (43) on its outer wall, and an annular groove is provided on the side facing the main cylinder (11). When the inner cover plate (41) is screwed to the inner wall of the main cylinder (11), the end of the main cylinder (11) is inserted into the annular groove.

8. The overhead conductor quick splicing device according to claim 6, characterized in that, The inner cover plate (41) has an extension (411) protruding from one end away from the main cylinder (11), and the wire hole (410) passes through the extension (411).

9. The overhead conductor quick splicing device according to claim 1, characterized in that, The outer wall of the insulating cylinder (1) is provided with an observation window (103) that connects to the mounting cavity (101).

10. A method for using a quick-connection device for overhead conductors, characterized in that, The overhead conductor quick splicing device applicable to any one of claims 1-9 comprises: S1. Use a cutting tool to trim the ends of the two overhead conductors (100) flat and wipe the dirt off the surface of the conductor ends; S2. Operate the drive mechanism (3) to bring the two elastic elements (21) closer to each other, and drive the two sets of wedge-shaped clips (22) to move away from the narrow end along the conical cavity (102), so that the conical insertion hole (2201) opens. S3. Insert the two overhead conductors (100) into the corresponding conical sockets (2201) from the narrow ends of the two conical cavities (102); S4. Operate the drive mechanism (3) to move the two elastic elements (21) away from each other, and drive the two sets of wedge-shaped clips (22) to move along the conical cavity (102) toward the narrow end. The wedge-shaped clips (22) are squeezed radially by the inner wall of the conical cavity (102), so that the piercing teeth (221) pierce into the corresponding overhead wire (100) to form an electrical contact.

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