Arc-extinguishing device for disconnecting and connecting power transmission and transformation lead in electrified manner

Abstract

The utility model relates to the technical field of live disconnection of power transmission / transformation leads, and provides an arc extinguishing device for live disconnection of power transmission and transformation leads, which comprises a hanger, a connecting part arranged at the bottom of the hanger, and two universal pulleys arranged at the bottom of the connecting part. The two universal pulleys are rotationally connected with the bottom of the connecting part; and one of the pulley parts of the two universal pulleys is an insulated pulley, and the other pulley part is a metal pulley. When live-line lead disconnection operation is carried out, a ground potential electrician can send the arc extinction rope and the transmission rope into an electric field together by using an operating rod, and an equipotential electrician does not need to carry the transmission rope to enter and exit from the electric field, so that the steps of carrying the transmission rope and installing the transmission rope by the equipotential electrician are reduced, and the labor intensity of the equipotential electrician is reduced; an arc extinguishing rope and an insulation transmission rope are convenient to install, and the operation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of live disconnection lead technology for power transmission / transformation lines, and in particular to an arc extinguishing device for live disconnection power transmission / transformation leads. Background Technology

[0002] In today's era of rapid technological development, people's daily electricity demand is increasing, making the power supply reliability of power supply companies even more important. As companies continue to raise their requirements for the safe operation of the power grid, the live disconnection of leads is a common practice in power transmission and transformation maintenance work. This method allows the equipment that needs maintenance to be disconnected and put into maintenance mode while the equipment is running, while other equipment continues to operate normally.

[0003] Currently, the arc-suppression pulleys used by various units in the domestic power industry for live-line disconnection and lead wire operation projects mainly include: bolt-type pulleys with the top open, which are hung on the conductor and then the bolts are tightened to secure the conductor; bolt-type pulleys with the sides open, which are hung on the conductor and then the top pressure plate is tightened to secure the conductor; clamp-type pulleys that clamp the conductor; and pulleys that connect soft copper wires to the conductor via metal pulleys. These existing arc-suppression pulleys lack versatility, and disassembly and assembly must be done manually using equipotential bonding equipment. The tools used by equipotential bonding electricians entering electric fields are mostly insulated lifting platforms, insulated A-frame ladders, insulated bucket trucks, and insulated horizontal ladders. These tools present difficulties in transportation, carrying, installation, and operation, and are also limited by the work site environment, lacking versatility.

[0004] Currently, when equipotential electricians enter or exit strong electric fields, they mostly transfer the potential directly by hand. After the potential transfer, a soft copper wire attached to the shielding suit is used to connect the electrician to the conductor to ensure that the personnel and the live conductor are at the same potential during the operation. Then, a transfer rope is installed at the point where the connection needs to be broken. The ground electrician uses the transfer rope to pass the arc-suppression pulley and arc-suppression rope to the equipotential electrician. The equipotential electrician installs the arc-suppression pulley on the main line and uses the arc-suppression rope on the pulley to tie to the disconnected lead wire. The ground electrician pulls the arc-suppression rope, and the equipotential electrician removes the lead wire connection bolts. After exiting the electric field and being 4.0m away from the break point, the ground electricians work together to disconnect the lead wire. Then, the equipotential electrician enters the electric field, removes the arc-suppression pulley and transfer rope, and then exits the electric field back to the ground. This method of operation, whether disconnecting or connecting leads, requires the equipotential electrician to enter and exit the electric field twice to complete the task. This not only increases the operational process of disconnecting leads but also increases the risk for the equipotential electrician to enter and exit the electric field, thus making the operation of disconnecting leads while they are energized more complicated and bringing many difficulties to the operation of disconnecting leads while they are energized.

[0005] Based on this, the present invention provides an arc extinguishing device for live disconnection of power transmission and transformation leads, so as to reduce the operation process of disconnecting leads, reduce the complexity of live disconnection of leads, and improve the operation efficiency of live disconnection of leads. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an arc-extinguishing device for live disconnection of power transmission and transformation leads, thereby reducing the operational process of disconnecting leads, lowering the complexity of live disconnection operations, and improving the operational efficiency of live disconnection.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An arc-extinguishing device for live disconnected power transmission and transformation leads includes: a bracket, a connecting component located at the bottom of the bracket, and two universal pulleys located at the bottom of the connecting component; the two universal pulleys are rotatably connected to the bottom of the connecting component; one of the pulley portions of the two universal pulleys is an insulated pulley, and the other is a metal pulley.

[0009] Preferably, the hanger includes: a hook and a movable buckle rotatably connected to the hook; the top of the hook has a mounting groove, and a shaft is detachably connected to the mounting groove, and the movable buckle is rotatably connected to the shaft.

[0010] Preferably, an anti-drop rod is provided on the outer side of the shaft; a torsion spring is sleeved on the shaft, one end of the torsion spring is connected to a hook, and the other end is connected to a movable buckle.

[0011] Preferably, the two universal pulleys have the same structure, and the universal pulley includes: a coupling housing rotatably connected to the bottom of the connecting component, a pulley part rotatably connected to the coupling housing, and a baffle plate whose lower end is rotatably connected to the pulley part; the upper end of the baffle plate is detachably connected to the coupling housing; the pulley part is installed between the baffle plate and the coupling housing by a pin, and the pulley part can rotate axially around the pin.

[0012] Preferably, the coupling housing has a cylindrical groove near the baffle, a guide rod is slidably connected in the cylindrical groove, and a spring is provided between the guide rod and the bottom of the cylindrical groove. One end of the spring is fixedly connected to the guide rod, and the other end of the spring is fixedly connected to the bottom of the cylindrical groove. The upper end of the baffle has a through hole with a diameter slightly larger than the cylindrical groove, and a control piece is slidably connected in the through hole. The unused end of the guide rod can slide into the through hole. The control piece and the baffle are connected by a fixing bolt, and the baffle can slide along the fixing bolt. The control piece is slidably connected to the through hole of the baffle through a cylindrical protrusion, and the thickness of the cylindrical protrusion is greater than the thickness of the baffle.

[0013] Preferably, the thickness of the control sheet gradually decreases at the ends of both sides, making the two sides of the control sheet beveled.

[0014] Preferably, a snap-fit ​​block is provided above the cylindrical groove of the coupling housing, and the upper end of the baffle is snapped between the snap-fit ​​block and the coupling housing.

[0015] Preferably, the connecting component includes: a connecting shell located at the bottom of the bracket, a connecting block located at the bottom of the connecting shell, and a T-shaped block slidably connected to the side of the connecting block; a connecting shaft is provided at the top of the connecting shell, the upper end of the connecting shaft having a diameter slightly larger than the lower end of the connecting shaft; a cylindrical cavity is provided at the bottom of the connecting shell, a T-shaped opening is provided on one side of the connecting block, a T-shaped block is slidably connected within the T-shaped opening, and a cylindrical space is formed between the T-shaped block and the connecting block; the upper end of the connecting shaft is placed within the cylindrical cavity at the bottom of the connecting shell, and the lower end of the connecting shaft is placed within the cylindrical space formed between the T-shaped block and the connecting block; the T-shaped block and the connecting block are connected to the bottom of the connecting shell by bolts.

[0016] This utility model discloses an overhead line maintenance operation method that combines a lifting device and a lateral walking device, which has the following beneficial effects.

[0017] This invention allows ground potential electricians to install or remove the arc-suppression device using a lever during live-line disconnection work, eliminating the need for equipotential electricians to enter the electric field for installation / removal. The hook features a locking safety function via a movable buckle, automatically closing and locking the conductor to prevent the arc-suppression device from falling off during use, ensuring the safety of the live-line disconnection. Two omnidirectional pulleys allow ground potential electricians to easily guide the arc-suppression rope and transfer rope into the electric field using the lever, eliminating the need for equipotential electricians to carry the transfer rope in and out of the electric field, thus reducing their workload. The installation process with a transfer rope reduces the labor intensity of equipotential electricians; it facilitates the installation of arc-extinguishing ropes and insulating transfer ropes. By pressing the control plate on the universal pulley, the cylindrical protrusion on the control plate presses down the guide rod, causing the guide rod to slide along the cylindrical groove. The guide rod disengages from the through hole at the upper end of the baffle, thereby loosening the connection between the baffle and the coupling housing. Rotating the baffle and control plate around the pin facilitates the installation of the arc-extinguishing rope and insulating transfer rope. The arc-extinguishing rope is connected to the metal pulley, and the insulating transfer rope is connected to the insulating pulley. Rotating the baffle and control plate around the pin resets the baffle, and the guide rod extends forward under the action of the spring and inserts into the through hole at the upper end of the baffle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the arc extinguishing device for live disconnection of power transmission and transformation leads according to this utility model.

[0019] Figure 2 This is a front view schematic diagram of the overall structure of the arc extinguishing device for live disconnection of power transmission and transformation leads of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the baffle and control plate of this utility model, which rotates and moves away around the pin as an axis.

[0021] Figure 4 This is a schematic diagram of the structure of the present invention after removing the baffle and control plate.

[0022] Figure 5 This is a schematic diagram of the connection between the coupling housing and the baffle plate of this utility model.

[0023] Figure 6 This is a schematic diagram showing the connection between the connecting component and the universal pulley of this utility model.

[0024] In the attached diagram: 1-Hook; 2-Connecting shell; 3-Insulated pulley; 4-Anti-drop rod; 5-Shaft; 6-Modible buckle; 7-Screw; 8-Metal pulley; 9-Torsion spring; 10-Bolt; 11-Control plate; 12-Baffle plate; 13-Pin; 14-Connecting block; 15-T-block; 16-Guide rod; 17-Coupling shell; 18-Fixing bolt; 19-Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0027] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0028] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances. Example 1

[0029] Reference Figure 1An arc-extinguishing device for disconnecting live power transmission and transformation leads includes: a bracket, a connecting component located at the bottom of the bracket, and two universal pulleys located at the bottom of the connecting component; the two universal pulleys are rotatably connected to the bottom of the connecting component; one of the pulley parts of the two universal pulleys is an insulated pulley 3, and the other is a metal pulley 8.

[0030] Preferably, in this embodiment, the hanger includes: a hook 1 and a movable buckle 6 rotatably connected to the hook 1; the top of the hook 1 has a mounting groove, and a shaft 5 is detachably connected to the mounting groove, with the movable buckle 6 rotatably connected to the shaft 5. The movable buckle 6 is 7-shaped, with the corner rotatably connected to the shaft 5. The shorter end is placed in the mounting groove, and the longer end is longer than the opening of the hook 1. When the shorter end of the movable buckle 6 contacts the wire, it drives the movable buckle 6 to rotate along the shaft 5, and the longer end abuts against the bottom of the hook 1, forming a sealed space inside the hook 1 to prevent the hook 1 from detaching from the wire.

[0031] Please refer to Figure 2 and Figure 4 As a preferred embodiment, an anti-drop rod 4 is provided on the outside of the shaft 5 to prevent the movable buckle 6 from rotating at an excessive angle, which would make it difficult for the operator to control. A torsion spring 9 is sleeved on the shaft 5. One end of the torsion spring 9 is connected to the hook 1, and the other end is connected to the movable buckle 6. The torsion spring 9 can make the longer end of the movable buckle 6 separate from the bottom of the hook 1 when the shorter end is not in contact with the wire, so that the hook 1 can be hung on the wire.

[0032] Please refer to Figure 3 and Figure 4 Preferably, in this embodiment, the two universal pulleys have the same structure. The universal pulley includes: a guide rod 16 rotatably connected to the bottom of the connecting component; 17; a pulley part rotatably connected to the guide rod 16; 17; and a baffle 12 whose lower end is rotatably connected to the pulley part; the upper end of the baffle 12 is detachably connected to the guide rod 16; 17; the pulley part is installed between the baffle 12 and the guide rod 16; 17 via a pin 13, and the pulley part can rotate axially around the pin 13.

[0033] Please refer to Figure 5 and Figure 6Preferably, in this embodiment, the connecting housing 16 has a guide rod; the guide rod 17 has a cylindrical groove near the baffle 12, and a guide rod is slidably connected in the cylindrical groove. A spring 19 is provided between the guide rod and the bottom of the cylindrical groove. One end of the spring 19 is fixedly connected to the guide rod, and the other end of the spring 19 is fixedly connected to the bottom of the cylindrical groove. The upper end of the baffle 12 has a through hole with a diameter slightly larger than the cylindrical groove. A control piece 11 is slidably connected in the through hole, and the unused end of the guide rod can slide into the through hole. The control piece 11 and the baffle 12 are connected by a fixing bolt 18, and the baffle 12 can slide along the fixing bolt 18. The control piece 11 is slidably connected to the through hole of the baffle 12 through a cylindrical protrusion, and the thickness of the cylindrical protrusion is greater than the thickness of the baffle 12. By pressing the control plate 11 on the universal pulley, the cylindrical protrusion on the control plate 11 presses down the guide rod, causing the guide rod to slide along the cylindrical groove. The guide rod disengages from the through hole at the upper end of the baffle 12, thereby loosening the connection between the baffle 12 and the guide rod 17 of the coupling housing 16. Figure 3 As shown, the baffle 12 and control plate 11 are rotated and moved apart around the pin 13 to facilitate the installation of the arc-extinguishing rope and the insulating transfer rope. The arc-extinguishing rope is connected to the metal pulley 8, and the insulating transfer rope is connected to the insulating pulley 3. The baffle 12 and control plate 11 are then rotated back to their original positions around the pin 13. Figure 5 As shown, the guide rod extends forward under the action of the spring 19 and inserts into the through hole provided at the upper end of the baffle 12.

[0034] Please refer to Figure 1 To facilitate the return of the baffle plate 12 and control plate 11 to their original positions after the arc-extinguishing rope and transmission rope are installed, preferably, in this embodiment, the thickness of the ends of both sides of the control plate 11 gradually decreases, making both sides of the control plate 11 inclined. This prevents the guide rod from jamming with the baffle plate 12 when the control plate 11 contacts the guide rod. Rotating the control plate 11 and the baffle plate 12 smoothly slides the guide rod into the cylindrical groove.

[0035] Please refer to Figure 5 In order to improve the stability of the connection between the baffle 12 and the guide rod 17 of the connecting shaft housing 16, preferably, in this embodiment, a snap-fit ​​block is provided above the cylindrical groove of the guide rod 17 of the connecting shaft housing 16, and the upper end of the baffle 12 is snapped into the snap-fit ​​block between the guide rod 17 of the connecting shaft housing 16.

[0036] Please refer to Figure 3 and Figure 6Preferably, in this embodiment, the connecting components include: a connecting shell 2 located at the bottom of the bracket via screws 7; a connecting block 14 located at the bottom of the connecting shell 2; and a T-shaped block 15 slidably connected to the side of the connecting block 14; a connecting shaft housing 16 with a guide rod; 17 has a connecting shaft at its top, with the upper diameter of the connecting shaft slightly larger than its lower diameter; the bottom of the connecting shell 2 has a cylindrical cavity, and one side of the connecting block 14 has a T-shaped opening, within which the T-shaped block 15 is slidably connected, forming a cylindrical space between the T-shaped block 15 and the connecting block 14; the upper end of the connecting shaft is placed in the cylindrical cavity at the bottom of the connecting shell 2, and the lower end of the connecting shaft is placed in the cylindrical space formed between the T-shaped block 15 and the connecting block 14; the T-shaped block 15 and the connecting block 14 are connected to the bottom of the connecting shell 2 via bolts 10. The connecting shaft housing 16 with a guide rod; 17 is rotatable along the connecting shaft axis. Example 2

[0037] Based on Embodiment 1, this embodiment provides a method for arc suppression by disconnecting a live power transmission and transformation lead, using the aforementioned arc suppression device for disconnecting a live power transmission and transformation lead, including the following steps:

[0038] Step 1: The ground electrician installs the arc-extinguishing rope and the insulating transfer rope on the two pulleys of the arc-extinguishing device respectively; by pressing the control plate 11 on the universal pulley, the cylindrical protrusion on the control plate 11 presses down the guide rod, causing the guide rod to slide along the cylindrical groove, and the guide rod disengages from the through hole at the upper end of the baffle plate 12, thereby loosening the connection between the baffle plate 12 and the guide rod 17 of the connecting housing 16. The baffle plate 12 and the control plate 11 are rotated and moved apart around the pin 13 to facilitate the installation of the arc-extinguishing rope and the insulating transfer rope. The arc-extinguishing rope is connected to the metal pulley 8, and the insulating transfer rope is connected to the insulating pulley 3. The baffle plate 12 and the control plate 11 are rotated and reset around the pin 13. The guide rod extends forward under the action of the spring 19 and is inserted into the through hole at the upper end of the baffle plate 12.

[0039] Step 2: The ground potential electrician carries the insulated transfer rope, climbs the tower to the appropriate working position, fastens the safety belt, and attaches the insulated transfer rope;

[0040] Step 3: The ground electrician uses an insulated transfer rope to hoist the insulated operating rod together with the arc suppression device to the ground potential electrician;

[0041] Step 4: The ground potential electrician uses the operating rod to hang the arc suppression device on the main line of the lead wire to be disconnected. The movable buckle 6 on the arc suppression device will automatically close and lock the main line to ensure that the arc suppression device will not fall off during use.

[0042] Step 5: The ground electrician installs the static rope for the lifting device and the backup safety rope for fall protection on the lifting device frame, and then uses an insulated transfer rope to hoist it to the ground potential electrician.

[0043] Step 6: The ground potential electrician uses the operating rod to hang the lifting device bracket on the conductor. The locking safety on the bracket automatically closes and locks the conductor, ensuring that the bracket will not fall off during use. In the application of the lifting device for power transmission and transformation lead disconnection work, the operator can ride the device at an angle of approximately 30 degrees, without being limited by equipment spacing. This fully demonstrates its advantages such as portability, flexible operation, no need for personnel to climb, and no restrictions on the working environment.

[0044] Step 7: The equipotential electrician puts on a full set of qualified shielding clothing, fastens the safety belt and backup safety rope, ascends via the lifting device, and pauses when approaching the live conductor at approximately 0.4m. The electrician then uses a potential transfer rod to transfer the potential before entering the electric field. The application of the potential transfer rod replaces the manual potential transfer by equipotential workers, ensuring a sufficient safe distance between the exposed parts of the worker and the live conductor during potential transfer. This reduces the impact of electric arcs on the human body and avoids potential damage to exposed parts of the body from pulse currents. It also ensures that the worker and the live conductor remain at the same potential, eliminating the need for a soft copper wire connected to the shielding clothing and conductor after manual potential transfer.

[0045] Step 8: Attach the lead wire to be disconnected with an arc-extinguishing rope and an insulating transfer rope. Both the arc-extinguishing rope and the insulating transfer rope should be attached to the end of the lead wire to be disconnected.

[0046] Step 9: The ground electrician sets up the arc-extinguishing rope and the insulation transfer rope, the equipotential electrician removes the lead wire connection bolt 10, and the passenger lift exits the electric field and returns to the ground;

[0047] Step 10: Two ground electricians connect the arc-extinguishing rope and the insulating transfer rope respectively. Under the command of the person in charge, they quickly pull the arc-extinguishing rope to quickly disconnect the lead wire through the arc-extinguishing device.

[0048] Step 11: After the ground electrician discharges the disconnected lead, fix it in place to prevent it from swinging.

[0049] Step 12: The ground potential electrician uses an insulated operating rod to remove the arc suppression device and the lifting device bracket respectively, ties them with an insulated transfer rope, and lowers them to the ground in coordination with the ground electrician;

[0050] Step 13: The ground potential electrician carries an insulated transfer rope down the tower to the ground and disconnects the lead wire. Example 3

[0051] Based on Embodiment 1, this embodiment provides a method for extinguishing arcs in live-connected power transmission and transformation leads, using the aforementioned arc-extinguishing device for live-connected power transmission and transformation leads, including the following steps:

[0052] Step 1: The ground electrician installs the arc-extinguishing rope and the insulating transfer rope on the two pulleys of the arc-extinguishing device respectively; by pressing the control plate 11 on the universal pulley, the cylindrical protrusion on the control plate 11 presses down the guide rod, causing the guide rod to slide along the cylindrical groove, and the guide rod disengages from the through hole at the upper end of the baffle plate 12, thereby loosening the connection between the baffle plate 12 and the guide rod 17 of the connecting housing 16. The baffle plate 12 and the control plate 11 are rotated and moved apart around the pin 13 to facilitate the installation of the arc-extinguishing rope and the insulating transfer rope. The arc-extinguishing rope is connected to the metal pulley 8, and the insulating transfer rope is connected to the insulating pulley 3. The baffle plate 12 and the control plate 11 are rotated and reset around the pin 13. The guide rod extends forward under the action of the spring 19 and is inserted into the through hole at the upper end of the baffle plate 12.

[0053] Step 2: The ground potential electrician carries the insulated transfer rope, climbs the tower to the appropriate working position, fastens the safety belt, and attaches the insulated transfer rope;

[0054] Step 3: The ground electrician uses an insulated transfer rope to hoist the insulated operating rod together with the arc suppression device to the ground potential electrician;

[0055] Step 4: The ground potential electrician uses the operating rod to hang the arc suppression device on the main line of the lead wire to be disconnected. The movable buckle 6 on the arc suppression device will automatically close and lock the main line to ensure that the arc suppression device will not fall off during use.

[0056] Step 5: The ground electrician installs the static rope for the lifting device and the backup safety rope for fall protection on the lifting device frame, and then uses an insulated transfer rope to hoist it to the ground potential electrician.

[0057] Step 6: The ground potential electrician uses the operating rod to hang the lifting device bracket on the conductor. The locking safety on the bracket will automatically close and lock the conductor, ensuring that the bracket will not fall off during use.

[0058] Step 7: The ground potential electrician uses an arc-extinguishing rope and an insulating transfer rope to tie the lead wires that need to be spliced;

[0059] Step 8: Two ground electricians shall respectively pull the arc-suppression rope and the insulation transfer rope. Under the command of the person in charge, the lead wire shall be quickly connected to the live conductor through the arc-suppression device. The ground electricians shall keep pulling the arc-suppression rope in place.

[0060] Step 9: The equipotential electrician puts on a full set of qualified shielding clothing, fastens the safety belt and backup safety rope, ascends via the lifting device, and pauses when approaching the live conductor at approximately 0.4m. The electrician then uses a potential transfer rod to transfer the potential before entering the electric field. The application of the potential transfer rod replaces the manual potential transfer by equipotential workers, ensuring a sufficient safe distance between the exposed parts of the worker and the live conductor during potential transfer. This reduces the impact of the discharge arc on the human body and avoids potential damage to exposed parts of the body from pulse current. It also ensures that the worker and the live conductor remain at the same potential, eliminating the need for a soft copper wire connected to the shielding clothing and conductor after manual potential transfer.

[0061] Step 10: The equipotential electrician grinds the contact surface of the lead wire, installs and tightens the connecting bolt 10, removes the arc-extinguishing rope and insulating transmission rope tied to the lead wire, and the passenger lifting device exits the electric field and returns to the ground.

[0062] Step 11: The ground potential electrician uses an insulated operating rod to remove the arc suppression device and the lifting device bracket respectively, ties them with an insulated transfer rope, and lowers them to the ground in coordination with the ground electrician;

[0063] Step 12: The ground potential electrician, carrying an insulated transfer rope, descends the tower to the ground to complete the lead wire connection work. Compared with traditional methods, this eliminates the need for the equipotential electrician to enter the electric field, optimizing the process of live lead wire disconnection. It saves one-third of the time per operation, improving work efficiency. Especially in substation live lead wire disconnection, it significantly reduces the number of operations required by operators, avoids accidents caused by misoperation, and ensures the safe operation of the power grid. The results show promising application prospects in live lead wire disconnection work on transmission and transformation equipment.

[0064] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. An arc-extinguishing device for live disconnected power transmission and transformation leads, characterized in that, include: The bracket, the connecting component at the bottom of the bracket, and the two universal pulleys at the bottom of the connecting component; the two universal pulleys are rotatably connected to the bottom of the connecting component; one of the pulleys of the two universal pulleys is an insulated pulley, and the other is a metal pulley.

2. The arc-extinguishing device for live disconnected power transmission and transformation leads as described in claim 1, characterized in that, The hanger includes: a hook and a movable buckle rotatably connected to the hook; the top of the hook has a mounting groove, and a shaft is detachably connected to the mounting groove, and the movable buckle is rotatably connected to the shaft.

3. The arc-extinguishing device for live disconnected power transmission and transformation leads as described in claim 2, characterized in that, An anti-drop rod is provided on the outside of the shaft; a torsion spring is sleeved on the shaft, one end of the torsion spring is connected to the hook, and the other end is connected to the movable buckle.

4. The arc-extinguishing device for live disconnected power transmission and transformation leads as described in claim 1, characterized in that, The two universal pulleys have the same structure. Each universal pulley includes: a coupling housing rotatably connected to the bottom of the connecting component, a pulley part rotatably connected to the coupling housing, and a baffle plate rotatably connected to the pulley part at its lower end. The upper end of the baffle plate is detachably connected to the coupling housing. The pulley part is installed between the baffle plate and the coupling housing by a pin, and the pulley part can rotate axially around the pin.

5. The arc-extinguishing device for live disconnected power transmission and transformation leads as described in claim 4, characterized in that, The coupling housing has a cylindrical groove near the baffle plate. A guide rod is slidably connected in the cylindrical groove. A spring is provided between the guide rod and the bottom of the cylindrical groove. One end of the spring is fixedly connected to the guide rod, and the other end of the spring is fixedly connected to the bottom of the cylindrical groove. The upper end of the baffle plate has a through hole with a diameter slightly larger than the cylindrical groove. A control plate is slidably connected in the through hole. The unused end of the guide rod can slide into the through hole. The control plate and the baffle plate are connected by a fixing bolt, and the baffle plate can slide along the fixing bolt. The control plate is slidably connected to the through hole of the baffle plate through a cylindrical protrusion. The thickness of the cylindrical protrusion is greater than the thickness of the baffle plate.

6. The arc-extinguishing device for live disconnected power transmission and transformation leads as described in claim 5, characterized in that, The thickness of the control plate gradually decreases at the ends of both sides, making the two sides of the control plate beveled.

7. The arc-extinguishing device for live disconnected power transmission and transformation leads as described in claim 5, characterized in that, A snap-fit ​​block is provided above the cylindrical groove of the coupling housing, and the upper end of the baffle is snapped into the snap-fit ​​block and the coupling housing.

8. The arc-extinguishing device for live disconnected power transmission and transformation leads as described in claim 4, characterized in that, The connecting components include: a connecting shell located at the bottom of the bracket, a connecting block located at the bottom of the connecting shell, and a T-shaped block slidably connected to the side of the connecting block; a connecting shaft is provided at the top of the connecting shell, with the upper end of the connecting shaft having a diameter slightly larger than the lower end; a cylindrical cavity is provided at the bottom of the connecting shell, and a T-shaped opening is provided on one side of the connecting block, with the T-shaped block slidably connected within the T-shaped opening, forming a cylindrical space between the T-shaped block and the connecting block; the upper end of the connecting shaft is placed within the cylindrical cavity at the bottom of the connecting shell, and the lower end of the connecting shaft is placed within the cylindrical space formed between the T-shaped block and the connecting block; the T-shaped block and the connecting block are connected to the bottom of the connecting shell by bolts.

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