Overhead line T contact wedge-shaped wire clamp, dismounting tool and mounting and dismounting method

Abstract

The invention relates to the technical field of overhead lines, in particular to an overhead line T-contact wedge-shaped wire clamp, a dismounting tool and a mounting and dismounting method.The overhead line T-contact wedge-shaped wire clamp is provided with an outer sheath, an inner wedge block and a draw-in bolt, the outer sheath is an isosceles trapezoid plate, the two waist sides of the isosceles trapezoid plate are bent towards the inner side, and a positioning protrusion is arranged in the middle of the inner side of the outer sheath; the device is characterized in that the inner wedge block is an A-shaped block matched with the outer sheath, the opening end of the A-shaped block is connected through a sealing plate, the middle of the side face of the sealing plate is integrally connected with a locking protrusion, a through hole is formed in the positioning protrusion, a threaded hole is formed in the locking protrusion, and a draw-in bolt penetrates through the through hole and then is connected with the threaded hole in the locking protrusion. A soft copper plate is arranged outside the A-shaped block, the soft copper plate wraps the outer side of the inner wedge block, the two sides of the soft copper plate extend into the outer sheath to wrap and be clamped on the cable of the inner wedge block and the outer sheath, and the cable has the advantages of being simple in structure, convenient to assemble and disassemble, high in connection strength, capable of being disassembled in an electrified mode, free of potential safety hazards, attractive and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of overhead lines, and specifically to a wedge-shaped wire clamp for an overhead line T-joint, a disassembly tool, and an installation and disassembly method, which are simple in structure, convenient for installation and disassembly, high in connection strength, capable of being disassembled while energized, free of safety hazards, and beautiful in appearance. Background Art

[0002] As is well known, a wedge-shaped wire clamp for an overhead line T-joint generally includes an outer sheath, an inner wedge block, and a tensioning bolt. The outer sheath is an isosceles trapezoidal plate, and the two waist sides of the isosceles trapezoidal plate are bent inward. The inner wedge block is placed inside the outer sheath. A positioning protrusion is provided in the middle of the inner side of the outer sheath, a locking protrusion is provided above the inner wedge block, a through hole is provided on the positioning protrusion, a threaded hole is provided on the locking protrusion, and the tensioning bolt passes through the through hole and is connected to the threaded hole on the locking protrusion. By rotating the tensioning bolt, the inner wedge block is pulled towards the short bottom direction of the outer sheath, thereby locking the two cables. The existing outer sheath and inner wedge block are made of cast aluminum. When replacing, it is found that due to oxidation, the wire clamp and the wire are often stuck together and cannot be opened, and a new wedge-shaped wire clamp can only be reconnected on the other side. However, since the original wedge-shaped wire clamp is still in the air, there are safety hazards and it is not beautiful. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned existing technologies, and to provide a wedge-shaped wire clamp for an overhead line T-joint, a disassembly tool, and an installation and disassembly method, which are simple in structure, convenient for installation and disassembly, high in connection strength, capable of being disassembled while energized, free of safety hazards, and beautiful in appearance.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A wedge-shaped wire clamp for an overhead line T-joint is provided with an outer sheath, an inner wedge block, and a tensioning bolt. The outer sheath is an isosceles trapezoidal plate, and the two waist sides of the isosceles trapezoidal plate are bent inward. A positioning protrusion is provided in the middle of the inner side of the outer sheath. It is characterized in that the inner wedge block is set as an A-shaped block that fits the outer sheath. The open ends of the A-shaped block are connected by a sealing plate. A locking protrusion is integrally connected to the middle of the side surface of the sealing plate. A through hole is provided on the positioning protrusion, a threaded hole is provided on the locking protrusion, and the tensioning bolt passes through the through hole and is connected to the threaded hole on the locking protrusion. A soft copper plate is provided outside the A-shaped block, and the soft copper plate wraps around the outside of the inner wedge block, and both sides of the soft copper plate extend into the outer sheath and wrap around and clamp the cables between the inner wedge block and the outer sheath.

[0005] The through hole of the present invention is set as a long strip shape, which is convenient for adjusting the width of the cable between the outer sheath and the inner wedge block to adapt to cables of different diameters.

[0006] Slots are respectively provided on the end faces of the two side walls at the open ends of the A-shaped block of the present invention, which is convenient for later disassembly.

[0007] An overhead line T-joint wedge clamp disassembly tool, characterized in that the disassembly tool is set as a gun-shaped body. Inside the barrel of the gun-shaped body, there is a rack sliding groove. A rack is installed in the rack sliding groove. Inside the handle of the gun-shaped body, a motor, a gear and a battery are installed. The gear meshes with the rack and is fixedly connected to the output shaft of the motor. The front end of the rack extends out of the front end of the barrel and is connected to an L-shaped plate. The horizontal part of the L-shaped plate is fixedly connected to the rack. The vertical part of the L-shaped plate faces upward of the gun-shaped body. The rear end of the rack extends out of a perforation provided at the rear side of the barrel. At the upper end of the vertical part of the L-shaped plate, there is a first plug with a triangular cross-section. At the outer end of the barrel, there is a second plug corresponding to the position of the first plug. The first plug and the second plug are respectively inserted into the slots of an A-shaped block. Inside the vertical part of the L-shaped plate, there is a connected extrusion plug with a triangular cross-section. The middle horizontal connecting part and the sealing plate of the A-shaped block are extruded and broken by the extrusion plug.

[0008] On the handle of the gun-shaped body of the present invention, there is a push switch, which is divided into a forward rotation switch and a reverse rotation switch. The forward rotation switch and the reverse rotation switch are respectively connected to the battery and the motor.

[0009] An installation and disassembly method for an overhead line T-joint wedge clamp, characterized in that the steps of the installation and disassembly method are as follows: (1) Installation method: First, remove the outer insulating layer of the overhead line, wrap one side of the soft copper plate around the overhead cable, then put one side of the outer sheath on the overhead line. At the same time, wind the cable to be connected around the other side of the soft copper plate, and then insert the cable to be connected and the soft copper plate together into the other side of the outer sleeve. The soft copper plate and the outer sheath form a ring. Then insert the inner wedge block between the two cables inside the outer sheath and the soft copper plate. The connecting bolt passes through the through hole on the positioning protrusion and is connected to the threaded hole on the locking protrusion. By rotating the connecting bolt, the inner wedge block is pulled towards the short bottom direction of the outer sheath until it is locked between the inner wedge block and the outer sheath. (2) Disassembly method: First, place the disassembly tool on the installed wedge clamp. The vertical part of the L-shaped plate of the disassembly tool is set on the inner wedge block, and the extrusion plug on the vertical plate is placed above the soft copper plate of the A-shaped block. The barrel of the gun-shaped body is located outside the outer sheath. Then the disassembly tool is clamped between the inner wedge block and the outer sheath. At this time, turn on the forward rotation switch, the motor rotates, driving the vertical plate of the L-shaped plate to squeeze towards the soft copper plate of the A-shaped block, thereby squeezing and breaking the copper plate on the A-shaped plate. Then place the extrusion plug on the vertical plate above the sealing plate of the A-shaped block. The barrel of the gun-shaped body is located outside the outer sheath. Then the disassembly tool is clamped between the inner wedge block and the outer sheath. At this time, turn on the forward rotation switch, the motor rotates, driving the vertical plate of the L-shaped plate to squeeze towards the sealing plate of the A-shaped block, thereby squeezing and breaking the sealing plate on the A-shaped plate, and at the same time squeezing and breaking the locking protrusion. Then, place the extrusion plug on the vertical plate above the middle horizontal connecting part of the A-shaped block. The barrel of the gun-shaped body is located outside the outer sheath. Then, clamp the disassembly tool between the inner wedge block and the outer sheath. At this time, turn on the forward rotation switch, and the motor rotates, driving the vertical plate of the L-shaped plate to extrude towards the middle horizontal connecting part of the A-shaped block, thereby crushing the middle horizontal connecting part on the A-shaped plate. Finally, drive the position of the L-shaped plate through the motor, insert the second plug on the barrel of the gun-shaped body and the first plug on the vertical plate into the slots of the A-shaped plate respectively. Then, rotate the motor forward to retract and pull the opening position of the A-shaped plate, thereby retracting and breaking the two side walls of the A-shaped plate. At this time, the inner wedge block is crushed and disassembled, and the cables on both sides of the inner wedge block are exposed and loosened. At the same time, the soft copper plate is removed, and finally the outer sheath is removed.

[0010] Due to the adoption of the above structure, the present invention has the advantages of simple structure, convenient installation and disassembly, high connection strength, live disassembly, no safety hazards, and beauty. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the wedge-shaped wire clamp of the present invention.

[0012] Figure 2 is Figure 1 a top view without a soft copper plate in

[0013] Figure 3 is a schematic structural diagram of the disassembly tool in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be further described below with reference to the accompanying drawings: As shown in the accompanying drawings, an overhead line T-joint wedge-shaped wire clamp is provided with an outer sheath 1, an inner wedge block 2, and a tensioning bolt 3. The outer sheath 1 is an isosceles trapezoidal plate, and the two waist sides of the isosceles trapezoidal plate are bent towards the inside. A positioning protrusion 4 is provided in the middle of the inner side of the outer sheath 1. It is characterized in that the inner wedge block 2 is set as an A-shaped block matching the outer sheath 1. The open end of the A-shaped block is connected through a sealing plate 5. A locking protrusion 6 is integrally connected to the middle of the side surface of the sealing plate 5. A through hole 7 is provided on the positioning protrusion 4, and a threaded hole is provided on the locking protrusion 6. The tensioning bolt 3 passes through the through hole 7 and is connected to the threaded hole on the locking protrusion 6. A soft copper plate 8 is provided outside the A-shaped block, and the soft copper plate 8 is wrapped outside the inner wedge block 2. The two sides of the soft copper plate 8 extend into the outer sheath 1 and are wrapped and clamped on the cables between the inner wedge block 2 and the outer sheath 1.

[0015] Furthermore, the through hole 7 is set as a long strip shape, which is convenient for adjusting the width of the cable between the outer sheath 1 and the inner wedge block 2 to adapt to cables of different diameters.

[0016] Further, slots 9 are respectively provided on the two side wall end faces of the open end of the A-shaped block, which is convenient for later disassembly.

[0017] A disassembly tool for a wedge-shaped wire clamp at the T-joint of an overhead line, characterized in that the disassembly tool is provided as a gun-shaped body. A rack sliding groove 11 is arranged inside the barrel 10 of the gun-shaped body. A rack 12 is installed in the rack sliding groove 11. A motor 13, a gear 14 and a battery 23 are installed inside the handle 18 of the gun-shaped body. The gear 14 meshes with the rack 12, and the gear 14 is fixedly connected to the output shaft of the motor 13. The front end of the rack 12 extends out of the front end of the barrel 10 and is connected to an L-shaped plate 15. The horizontal part of the L-shaped plate 15 is fixedly connected to the rack 12. The vertical part of the L-shaped plate 15 faces upward of the gun-shaped body. The rear end of the rack 12 extends out of a through hole 16 provided at the rear side of the barrel 10. The upper end of the vertical part of the L-shaped plate 15 is provided with a first plug 17 with a triangular cross-section. A second plug 19 corresponding to the position of the first plug 17 is provided at the outer end of the barrel 10. The first plug 17 and the second plug 19 are respectively inserted into the slot 9 of the A-shaped block. The inner side of the vertical part of the L-shaped plate 15 is connected to a squeezing plug 20 with a triangular cross-section. The middle horizontal connecting part and the sealing plate 5 of the A-shaped block are squeezed and broken by the squeezing plug 20.

[0018] Further, a push switch is provided on the handle 18 of the gun-shaped body. The push switch is divided into a forward rotation switch 21 and a reverse rotation switch 22. The forward rotation switch 21 and the reverse rotation switch 22 are respectively connected to the battery and the motor 13.

[0019] An installation and disassembly method for a wedge-shaped wire clamp at the T-joint of an overhead line, characterized in that the steps of the installation and disassembly method are as follows: (1) Installation method: First, remove the external insulation layer of the overhead line, wrap one side of the soft copper plate 8 around the overhead cable, then put one side of the outer sheath 1 on the overhead line. At the same time, wind the other side of the soft copper plate 8 with the line to be connected. Then insert the line to be connected and the soft copper plate 8 together into the other side of the outer sleeve. The soft copper plate 8 and the outer sheath 1 form a ring. Then insert the inner wedge block 2 between the two lines inside the outer sheath 1 and the soft copper plate 8. The connecting bolt passes through the through hole 7 on the positioning protrusion 4 and is connected to the threaded hole on the locking protrusion 6. By rotating the connecting bolt, the inner wedge block 2 is pulled towards the short bottom direction of the outer sheath 1 until the inner wedge block 2 is locked with the outer sheath 1. (2) Dismantling method: First, place the dismantling tool on the installed wedge-shaped wire clamp. The vertical part of the L-shaped plate 15 of the dismantling tool is set on the inner wedge block 2, and the extrusion plug 20 on the vertical plate is placed above the soft copper plate 8 of the A-shaped block. The barrel 10 of the gun-shaped body is located outside the outer sheath 1. Then, the dismantling tool is clamped between the inner wedge block 2 and the outer sheath 1. At this time, turn on the forward rotation switch 21, and the motor 13 rotates, driving the vertical plate of the L-shaped plate 15 to extrude towards the soft copper plate 8 of the A-shaped block, thereby crushing the copper plate on the A-shaped plate. After the extrusion is completed, turn on the reverse rotation switch. Then, place the extrusion plug 20 on the vertical plate above the sealing plate 5 of the A-shaped block. The barrel 10 of the gun-shaped body is located outside the outer sheath 1. Then, the dismantling tool is clamped between the inner wedge block 2 and the outer sheath 1. At this time, turn on the forward rotation switch 21, and the motor 13 rotates, driving the vertical plate of the L-shaped plate 15 to extrude towards the sealing plate 5 of the A-shaped block, thereby crushing the sealing plate 5 on the A-shaped plate and simultaneously crushing the locking protrusion 6. After the extrusion is completed, turn on the reverse rotation switch. Then, place the extrusion plug 20 on the vertical plate above the middle horizontal connecting part of the A-shaped block. The barrel 10 of the gun-shaped body is located outside the outer sheath 1. Then, the dismantling tool is clamped between the inner wedge block 2 and the outer sheath 1. At this time, turn on the forward rotation switch 21, and the motor 13 rotates, driving the vertical plate of the L-shaped plate 15 to extrude towards the middle horizontal connecting part of the A-shaped block, thereby crushing the middle horizontal connecting part on the A-shaped plate. After the extrusion is completed, turn on the reverse rotation switch. Finally, drive the position of the L-shaped plate 15 through the motor 13, insert the second plug 19 on the barrel 10 of the gun-shaped body and the first plug 17 on the vertical plate into the slot 9 of the A-shaped plate respectively. Then, rotate the motor 13 forward to retract and pull the opening position of the A-shaped plate, thereby retracting and breaking the two side walls of the A-shaped plate. After the extrusion is completed, turn on the reverse rotation switch. At this time, the inner wedge block 2 is broken and disassembled, thereby exposing the cables on both sides of the inner wedge block 2 and loosening them. At the same time, the soft copper plate 8 is removed, and finally the outer sheath 1 is removed.

[0020] Since the inner wedge block 2 adopts an A-shaped structure as described above, its disassembly extrusion strength can be reduced. It only needs to extrude and crush the sealing plate 5 and the middle transverse connecting part of the A-shaped plate, and then perform inward contraction extrusion on the open ends of the two side plates of the A-shaped plate, so as to integrally crush the A-shaped inner wedge block 2. Moreover, because it is set as an A-shaped plate, the locking bolt can be seen through the opening position, and the locking bolt can also be extruded and crushed, which further ensures the extrusion and crushing effect of the inner wedge block 2. At the same time, since the outer side of the inner wedge block 2 is sleeved with a soft copper plate 8, the soft copper plate 8 can conduct electricity while also wrapping the cable. The soft copper plate 8 can protect the cable and avoid the situation where the cable corrodes and adheres to the inner wedge block 2 and the outer sheath 1 and cannot be disassembled. In addition, a special disassembly tool is designed, which can perform live disassembly at high altitude. It only needs to extrude the inner wedge block 2. At the same time, since a perforation 16 is provided at the rear end of the gun barrel 10 of the gun-type body, the moving displacement of the L-shaped plate 15 can be increased. At the same time, when the plug on the L-shaped plate 15 is damaged, the L-shaped plate 15 and the rack 12 can be replaced together. The L-shaped plate 15 and the rack 12 are integrally connected, which ensures the extrusion strength and also avoids the problem of fracture between the L-shaped plate 15 and the rack 12, and can also ensure the extrusion and crushing effect. Because the present invention adopts the above structure, it has the advantages of simple structure, convenient installation and disassembly, high connection strength, live disassembly, no safety hazards, and beauty.

Claims

1. An overhead line T-joint wedge clamp is provided with an outer sheath, an inner wedge block, and a tension bolt. The outer sheath is an isosceles trapezoidal plate, and the two waist sides of the isosceles trapezoidal plate are bent inward. A positioning protrusion is provided in the middle of the inner side of the outer sheath. It is characterized in that The inner wedge block is set as an A-shaped block that fits with the outer sheath. The open ends of the A-shaped block are connected by a sealing plate. A locking protrusion is integrally connected to the middle of the side surface of the sealing plate. A through hole is provided on the positioning protrusion, and a threaded hole is provided on the locking protrusion. The tensioning bolt passes through the through hole and is connected to the threaded hole on the locking protrusion. A soft copper plate is provided outside the A-shaped block, and the soft copper plate wraps around the outside of the inner wedge block. The two sides of the soft copper plate extend into the outer sheath and wrap around and clamp the cable between the inner wedge block and the outer sheath.

2. The wedge-shaped wire clamp for the T-joint of the overhead line according to claim 1, wherein The through hole is set as a long strip shape, which is convenient for adjusting the width of the cable between the outer sheath and the inner wedge block to adapt to cables of different diameters.

3. The wedge-shaped wire clamp for the T-joint of the overhead line according to claim 1, wherein Slots are respectively provided on the end faces of the two side walls at the open ends of the A-shaped block, which is convenient for later disassembly.

4. An overhead line T-joint wedge clamp disassembly tool, characterized in that The disassembly tool is set as a gun-shaped body. A rack sliding groove is provided inside the gun barrel of the gun-shaped body. A rack is installed in the rack sliding groove. A motor, a gear and a battery are installed inside the handle of the gun-shaped body. The gear meshes with the rack and is fixedly connected to the output shaft of the motor. The front end of the rack extends out of the front end of the gun barrel and is connected to an L-shaped plate. The horizontal part of the L-shaped plate is fixedly connected to the rack. The vertical part of the L-shaped plate faces upward of the gun-shaped body. The rear end of the rack extends out of a perforation provided at the rear side of the gun barrel. A first plug with a triangular cross-section is provided at the upper end of the vertical part of the L-shaped plate. A second plug corresponding to the position of the first plug is provided at the outer end of the gun barrel. The first plug and the second plug are respectively inserted into the slots of the A-shaped block. An extrusion plug with a triangular cross-section is connected to the inner side of the vertical part of the L-shaped plate. The middle horizontal connecting part of the A-shaped block and the sealing plate are crushed by the extrusion plug.

5. The wedge-shaped wire clamp disassembly tool for overhead line T-joints according to claim 4, characterized in that A push switch is provided on the handle of the gun-shaped body. The push switch is divided into a forward rotation switch and a reverse rotation switch. The forward rotation switch and the reverse rotation switch are respectively connected to the battery and the motor.

6. A method for installing and disassembling a wedge clamp at the T-joint of an overhead line, characterized in that The steps of the installation and disassembly method are as follows: (1) Installation method: First, remove the external insulation layer of the overhead line, wrap one side of the soft copper plate around the overhead cable, then put one side of the outer sheath on the overhead line. At the same time, wind the cable to be connected around the other side of the soft copper plate, and then insert the cable to be connected and the soft copper plate together into the other side of the outer sleeve. The soft copper plate and the outer sheath form a ring. Then insert the inner wedge block between the two cables inside the outer sheath and the soft copper plate. The connecting bolt passes through the through hole on the positioning protrusion and is connected to the threaded hole on the locking protrusion. By rotating the connecting bolt, the inner wedge block is pulled towards the short bottom direction of the outer sheath until it is locked between the inner wedge block and the outer sheath. (2) Disassembly method: First, place the disassembly tool on the installed wedge-shaped wire clamp. The vertical part of the L-shaped plate of the disassembly tool is arranged on the inner wedge block, and the extrusion plug on the vertical plate is placed above the soft copper plate of the A-shaped block. The gun barrel of the gun-shaped body is located outside the outer sheath. Then the disassembly tool is clamped between the inner wedge block and the outer sheath. At this time, turn on the forward rotation switch, the motor rotates, driving the vertical plate of the L-shaped plate to squeeze towards the soft copper plate of the A-shaped block, and then the copper plate on the A-shaped plate is crushed. Then, place the extrusion plug on the vertical plate above the sealing plate of the A-shaped block. The barrel of the gun-type body is located outside the outer sheath. Then, snap the disassembly tool between the inner wedge block and the outer sheath. At this time, turn on the forward rotation switch, and the motor rotates, driving the vertical plate of the L-shaped plate to extrude towards the sealing plate of the A-shaped block, thereby crushing the sealing plate on the A-shaped plate and simultaneously crushing the locking protrusion. Then, place the extrusion plug on the vertical plate above the middle horizontal connecting part of the A-shaped block. The barrel of the gun-type body is located outside the outer sheath. Then, snap the disassembly tool between the inner wedge block and the outer sheath. At this time, turn on the forward rotation switch, and the motor rotates, driving the vertical plate of the L-shaped plate to extrude towards the middle horizontal connecting part of the A-shaped block, thereby crushing the middle horizontal connecting part on the A-shaped plate. Finally, drive the position of the L-shaped plate through the motor, insert the second plug on the barrel of the gun-type body and the first plug on the vertical plate into the slots of the A-shaped plate respectively. Then, rotate the motor forward to retract and pull the opening position of the A-shaped plate, thereby retracting and breaking the two side walls of the A-shaped plate. At this time, the inner wedge block is crushed and disassembled, thereby exposing and loosening the cables on both sides of the inner wedge block. At the same time, the soft copper plate is removed, and finally the outer sheath is removed.

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