An insulating isolation device for live working of power distribution lines

Abstract

The application belongs to the technical field of live working of distribution line, and particularly relates to an insulation isolation device for live working of distribution line, which comprises a lower semicircular insulation cylinder and an upper semicircular insulation cylinder, further comprises a lifting and clamping assembly and an insulation cloth winding assembly, the lower semicircular insulation cylinder and the upper semicircular insulation cylinder are integrally connected with semicircular extension cylinders at two ends, the inner wall of the semicircular extension cylinder is fixed with a semicircular sealing rubber gasket, and the lower semicircular insulation cylinder and the upper semicircular insulation cylinder are buckled to form a complete cylindrical insulation cylinder body. The upper and lower semicircular insulation cylinders with quick opening and closing locking are matched with the end sealing rubber gasket, one-person quick installation, rain sealing and waterproof operation are realized, the soft and hard double insulation structure with the hard cylinder body and the constant tension insulation cloth winding can adapt to different wire diameters, eliminate the fitting gap between the sleeve and the line, avoid electric field distortion and partial discharge, and improve the insulation protection strength and operation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of live-line working technology for power distribution lines, and in particular relates to an insulation and isolation device for live-line working of power distribution lines. Background Technology

[0002] With the increasing demands for power supply reliability in power distribution networks, live-line work has become the primary method for the maintenance, upgrading, and emergency repair of power distribution lines. Among these methods, the replacement of distribution transformers generally requires the use of low-voltage power generation, meaning that the transformer replacement work can be completed using a temporary low-voltage generator without interrupting the power supply to users.

[0003] Low-voltage power generation operations have significant unique characteristics: bidirectional power flow, unstable temporary power supply conditions, narrow phase-to-phase distances, numerous exposed live parts, prominent induced voltage, and limited working space. These characteristics place extremely high demands on insulation protection for live-line work. Inadequate insulation can easily lead to safety accidents such as phase-to-phase short circuits, discharge to ground, electric shock, and induced voltage injuries.

[0004] Currently, insulation in low-voltage power generation operations mainly relies on traditional soft insulation tools such as insulating blankets and insulating barriers. Workers need to manually cover exposed wires, clamps, and joints point by point, using numerous insulating clamps for securing them. This method has the following serious drawbacks: 1. Extremely low work efficiency: It takes an average of 5 to 8 minutes to cover a 1-meter-long section of wire, and requires the cooperation of multiple people, which greatly prolongs the work time and increases the work risk; 2. Unreliable shielding quality: Gaps are inevitable at the joints of multiple insulating blankets, forming weak points in the insulation. The insulating blankets lack rigid support and are easily slipped or detached due to wind disturbance or tool operation during high-altitude operations. 3. Poor mechanical protection performance: The mechanical strength of the insulating blanket is limited. Even slight bumps may cause damage or pinholes, resulting in a complete loss of protective ability. 4. Prone to failure in rainy weather: The insulation resistance of damp insulating blankets can drop by 3 to 4 orders of magnitude, making them extremely susceptible to surface discharge or breakdown. According to GB / T18857-2019 "Technical Guidelines for Live Working on Distribution Lines", live working should not be carried out in rainy, snowy, or foggy weather. This means that traditional insulating blanket solutions are completely unable to cope with sudden rainfall.

[0005] To address the aforementioned problems with insulating blankets, insulation isolation methods using rigid insulating sleeves have emerged in recent years, such as the insulating isolation device for live-line work on power distribution lines proposed in Chinese Patent Publication No. CN115800074A. This solution is faster and more convenient than the traditional method of using insulating blankets, greatly improving work efficiency. However, it still has the following insurmountable drawbacks: 1. Traditional rigid insulating sleeves are mostly of fixed size and cannot be adapted to power distribution lines with different wire diameters; 2. Due to uneven conductor surface and manufacturing tolerances of the sleeve, there is a gap of 0.5 to 3 mm between the inner wall of the sleeve and the conductor. The existence of the gap will change the electric field distribution, form a high field strength region at the edge of the gap, reduce the overall insulation strength, and the air insulation strength in the gap is much lower than that of solid insulation material, which greatly shortens the effective creepage distance. 3. With openings at both ends of the isolation sleeve, rainwater will directly flow into the sleeve and form a continuous water film in the gap. Although rainwater itself has limited conductivity, the continuous water film formed in the narrow gap will become a good conductive channel, which can easily cause phase-to-phase short circuits or phase-to-ground short circuits. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing an insulation and isolation device for live-line work on power distribution lines.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an insulating isolation device for live-line work on power distribution lines, comprising a lower semi-circular insulating cylinder and an upper semi-circular insulating cylinder, and further comprising a lifting clamping assembly and an insulating cloth winding assembly; Both ends of the lower and upper semicircular insulating cylinders are integrally connected with semicircular extension cylinders. The inner wall of the semicircular extension cylinder is fixed with a semicircular sealing gasket. After the lower and upper semicircular insulating cylinders are fastened together, a complete cylindrical insulating cylinder is formed. The semicircular extension cylinders at both ends are fastened together to form an extended sealing section. The two semicircular sealing gaskets are pressed together to form an annular sealing structure. The lifting and clamping assembly is fixedly connected to the outer wall of the lower and upper semicircular insulating cylinders on the same side. It is used to control the opening and closing of the lower and upper semicircular insulating cylinders and to provide a continuous clamping force to make the two cylinders stably fastened together. The insulating cloth winding assembly is installed in the internal cavity of the lower and upper semi-circular insulating cylinders. It is used to automatically wrap a continuous insulating layer around the outer periphery of the power distribution line after the fastening is completed, forming an auxiliary insulating layer that fits seamlessly with the surface of the conductor.

[0008] Furthermore, the lifting and clamping assembly includes a support sleeve, a lower connecting plate, a support rod, an upper connecting plate, multiple guide rods, multiple pressure springs, a locking plate, a U-shaped clamping plate, and a handle; The lower connecting plate is fixedly connected to the middle of the outer side wall of the lower semi-circular insulating cylinder, and the support sleeve is vertically fixed to the center of the lower surface of the lower connecting plate. The upper connecting plate is fixedly connected to the middle of the outer side wall of the upper semi-circular insulating cylinder, and the support rod is vertically fixed to the center of the lower surface of the upper connecting plate, and the support rod is movably inserted into the inside of the support sleeve. The upper ends of multiple guide rods are fixed to the lower surface of the upper connecting plate, and the lower ends pass through the lower connecting plate and can slide relative to each other; Multiple compression springs are respectively sleeved on the outside of each guide rod, and the upper and lower ends of the compression springs are fixedly connected to the lower surface of the upper connecting plate and the upper surface of the lower connecting plate, respectively. The locking plate is fixed to the bottom end of the support rod, and the U-shaped clamping plate is rotatably connected to the lower outer wall of the support sleeve via a rotating shaft. The inner side of the horizontal part of the U-shaped clamping plate is set with an arc surface structure that matches the lower surface of the locking plate. The handle is fixed to the lower end of the U-shaped clamping plate.

[0009] Furthermore, the lower end of the locking plate is provided with a slot for the U-shaped clamping plate to be inserted. When the U-shaped clamping plate is inserted into the slot, its upper horizontal surface is in close contact with the lower surface of the locking plate, locking the support rod at the lowest position relative to the support sleeve. At this time, the lower semicircular insulating cylinder and the upper semicircular insulating cylinder are in a fully open state.

[0010] Furthermore, the insulating cloth winding assembly includes two semi-circular toothed rings, two sets of transfer components, a U-shaped mounting plate, a dual-axis motor, two gears, a winding frame, a winding drum, insulating cloth, a torque motor, and a positioning rod; Two semicircular gear rings are respectively set inside the lower semicircular insulating cylinder and the upper semicircular insulating cylinder, and a set of transfer components for driving the semicircular gear rings to move along the cylinder axis is installed on the inner wall of both the lower and upper semicircular insulating cylinders. The U-shaped mounting plate is slidably mounted on the semi-circular gear ring, and the dual-axis motor is fixed to the inner side wall of the U-shaped mounting plate. Both output ends of the dual-axis motor are fixedly connected to gears, and both gears mesh with the semi-circular gear ring for transmission. The winding frame is fixed to the outer wall of the U-shaped mounting plate, the winding drum is rotatably installed inside the winding frame, the insulating cloth is wound around the outside of the winding drum, the torque motor is fixed to the outer wall of the winding frame, and its output shaft is connected to one end of the winding drum for transmission. The positioning rod is fixed to one side of the inner wall of the lower semi-circular insulating cylinder, and the free end of the insulating cloth is fixedly connected to the positioning rod.

[0011] Furthermore, the transfer assembly includes a screw, a servo motor, a transmission block, and a limiting slide bar; The screw is rotatably connected to the inner wall of the lower or upper semi-circular insulating cylinder along the cylinder axis, and the servo motor is fixed to the end of the inner wall of the cylinder, with its output shaft being connected to one end of the screw for transmission. The transmission block is fixed to the outer wall of the semi-circular gear ring, and the transmission block has a threaded hole that matches the screw. The transmission block and the screw are connected by a threaded transmission. The limiting slide rod is parallel to the screw and fixed to the inner wall of the cylinder, and the transmission block is provided with a limiting slide hole that slides and engages with the limiting slide rod.

[0012] Furthermore, arc-shaped sliding grooves are provided on both opposite side walls of the semi-circular toothed ring, and arc-shaped sliders that are slidably connected to the arc-shaped sliding grooves are fixed on the inner sides of both ends of the U-shaped mounting plate.

[0013] Furthermore, the semi-circular sealing gasket is made of EPDM rubber with a Shore hardness of 40-50, and its inner wall is provided with multiple concentric annular sealing ridges. When the upper and lower semi-circular sealing gaskets are pressed together, the annular sealing ridges are tightly attached to the surface of the power distribution line to form multiple sealing defenses.

[0014] Furthermore, the torque motor is a permanent magnet DC torque motor, which can automatically adjust the speed according to the tension of the insulating cloth during the release process. When the tension increases, the release speed is automatically increased, and when the tension decreases, the release speed is automatically decreased, so that the insulating cloth is always wrapped around the surface of the power distribution line with a constant tension.

[0015] Compared with existing technologies, the advantages of this invention are as follows: 1. With the spring pressure and quick locking design of the lifting clamping assembly, the device can be installed and fixed within 30 seconds by a single person, saving more than 90% of the time compared with the traditional insulation blanket solution, and significantly improving work efficiency.

[0016] 2. The external rigid insulating sleeve provides primary insulation and mechanical protection, while the internal tightly wound insulating cloth provides auxiliary insulation, forming a "hard + soft" dual insulation barrier, which significantly improves the insulation strength compared to traditional rigid sleeves.

[0017] 3. Under the constant tension control of the torque motor, the insulating cloth is tightly wrapped around the surface of the conductor, which can fully adapt to the uneven surface and irregular shape of the conductor, effectively eliminating the gap problem of traditional rigid sleeves and avoiding electric field distortion and partial discharge.

[0018] 4. The semi-circular sealing gaskets at both ends form multiple ring seals, which can effectively prevent rainwater from entering the sleeve. The insulating cloth is made of highly hydrophobic material, so even if a small amount of water vapor seeps in, it will not form a continuous water film. It can operate normally in light rain, breaking through the weather limitations of traditional insulation and isolation devices.

[0019] 5. By wrapping the insulating cloth, it can be adapted to power distribution lines with different wire diameters, eliminating the need to prepare multiple specifications of sleeves, achieving "one device for multiple specifications" and reducing equipment costs. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the installation portion of the lower and upper semi-circular insulating cylinders of the present invention. Figure 3 This is a three-dimensional structural diagram of the lower semi-circular insulating cylinder of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the lifting and clamping assembly of the present invention; Figure 5 yes Figure 4 A three-dimensional structural diagram of the U-shaped clamping plate; Figure 6 This is a top-view three-dimensional structural schematic diagram of the insulating cloth winding assembly of the present invention; Figure 7 This is a bottom-view three-dimensional structural diagram of the insulating cloth winding assembly of the present invention.

[0021] In the diagram: 1 Lower semi-circular insulating cylinder, 2 Upper semi-circular insulating cylinder, 3 Semi-circular extension cylinder, 4 Semi-circular sealing gasket, 5 Lifting clamping assembly, 51 Support sleeve, 52 Lower connecting plate, 53 Support rod, 54 Upper connecting plate, 55 Guide rod, 56 Pressure spring, 57 Locking plate, 58 Rotary shaft, 59 U-shaped clamping plate, 510 Handle, 6 Insulating cloth winding assembly, 61 Semi-circular gear ring, 62 Transfer assembly, 621 Screw, 622 Servo motor, 623 Transmission block, 624 Limiting slide rod, 63 U-shaped mounting plate, 64 Dual-axis motor, 65 Gear, 66 Rewinding frame, 67 Rewinding drum, 68 Insulating cloth, 69 Torque motor, 610 Positioning rod, 611 Arc-shaped slide groove, 612 Arc-shaped slider. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] like Figures 1-7 As shown, an insulating isolation device for live-line work on power distribution lines includes a lower semi-circular insulating cylinder 1, an upper semi-circular insulating cylinder 2, a lifting and clamping assembly 5, and an insulating cloth wrapping assembly 6. Both ends of the lower semicircular insulating cylinder 1 and the upper semicircular insulating cylinder 2 are integrally connected to a semicircular extension cylinder 3. A semicircular sealing gasket 4 is fixed to the inner wall of the semicircular extension cylinder 3. The semicircular sealing gasket 4 is fixed to the inner wall of the semicircular extension cylinder 3 by adhesive bonding. The semicircular sealing gasket 4 is made of EPDM rubber with a Shore hardness of 45, which has good elasticity and aging resistance. The inner wall of the semicircular sealing gasket 4 is also provided with 3 concentric annular sealing ridges with a height of 1-2mm. When the upper and lower semicircular sealing gaskets 4 are pressed together, these sealing ridges will undergo elastic deformation and fit tightly against the surface of the conductor, forming multiple continuous annular sealing lines to effectively prevent rainwater and dust from entering the cylinder.

[0024] The lifting and clamping assembly 5 is the core component for enabling quick installation and clamping of the device. The lower connecting plate 52 is fixedly connected to the middle of the outer side wall of the lower semi-circular insulating cylinder 1, and the support sleeve 51 is vertically welded and fixed to the center of the lower surface of the lower connecting plate 52. The upper connecting plate 54 is fixedly connected to the middle of the outer side wall of the upper semi-circular insulating cylinder 2, and the support rod 53 is vertically welded and fixed to the center of the lower surface of the upper connecting plate 54. The diameter of the support rod 53 is slightly smaller than the inner diameter of the support sleeve 51, and it can slide freely inside the support sleeve 51.

[0025] To ensure the stability of the lower semicircular insulating cylinder 1 and the upper semicircular insulating cylinder 2 during the opening and closing process, multiple guide rods 55 are provided. The upper end of the guide rod 55 is welded and fixed to the lower surface of the upper connecting plate 54, and the lower end passes through the corresponding guide hole on the lower connecting plate 52 and can slide relative to each other. Each guide rod 55 is fitted with a pressure spring 56. The pressure spring 56 is made of stainless steel, and its upper and lower ends are welded and fixed to the lower surface of the upper connecting plate 54 and the upper surface of the lower connecting plate 52, respectively. The preload of the pressure spring 56 is designed to be 50~100N, which can provide a continuous and stable clamping force to ensure that the upper and lower semicircular insulating cylinders are tightly fastened.

[0026] A circular locking plate 57 is welded and fixed to the bottom end of the support rod 53. The diameter of the locking plate 57 is larger than the diameter of the support rod 53. A U-shaped clamping plate 59 is rotatably connected to the lower outer wall of the support sleeve 51 via a rotating shaft 58. The inner side of the horizontal part of the U-shaped clamping plate 59 is designed with an arc surface structure that matches the lower surface of the locking plate 57. The handle 510 is fixed to the lower end of the U-shaped clamping plate 59 by bolts. The lower end of the locking plate 57 has a slot for the U-shaped clamping plate 59 to be engaged. When it is necessary to open the device... Push the support rod 53 upward to bring the locking plate 57 close to the U-shaped clamping plate 59, and then rotate the handle 510 to make the U-shaped clamping plate 59 engage with the groove on the lower side of the locking plate 57. At this time, the upper surface of the horizontal part of the U-shaped clamping plate 59 is in close contact with the lower surface of the locking plate 57, locking the support rod 53 at the lowest position relative to the support sleeve 51. The lower semicircular insulating cylinder 1 and the upper semicircular insulating cylinder 2 are in a fully open state, and the opening gap can reach 30-50mm, which is sufficient to accommodate the conductors of the power distribution line.

[0027] The insulating cloth winding assembly 6 is a key component for achieving gapless insulation and isolation. Two semi-circular toothed rings 61 are respectively set inside the lower semi-circular insulating cylinder 1 and the upper semi-circular insulating cylinder 2. When the lower semi-circular insulating cylinder 1 and the upper semi-circular insulating cylinder 2 are fastened together, the two semi-circular toothed rings 61 are also fastened together to form a complete circular toothed ring.

[0028] Both the lower semicircular insulating cylinder 1 and the upper semicircular insulating cylinder 2 are equipped with a set of transfer components 62, which are used to drive the semicircular gear ring 61 to move axially along the cylinder body. The transfer component 62 includes a screw 621, a servo motor 622, a transmission block 623, and a limiting slide rod 624. The two ends of the screw 621 are rotatably connected to the inner wall of the cylinder body through bearing seats, and its axis is parallel to the cylinder body axis. The servo motor 622 is fixed to the end of the inner wall of the cylinder body through a motor bracket, and its output shaft is connected to one end of the screw 621 through a coupling. The transmission block 623 is fixed to the outer wall of the semicircular gear ring 61. The transmission block 623 has a threaded hole that matches the screw 621, and the two form a threaded transmission pair. The limiting slide rod 624 is fixed to the inner wall of the cylinder body parallel to the screw 621. The transmission block 623 has a limiting sliding hole that slides with the limiting slide rod 624 to limit the rotation of the transmission block 623 and ensure that it can only move axially.

[0029] Both ends of the U-shaped mounting plate 63 are fixed with arc-shaped sliders 612. The two arc-shaped sliders 612 are respectively embedded in the arc-shaped grooves 611 on the two side walls of the semi-circular gear ring 61, so that the U-shaped mounting plate 63 can slide freely along the circumference of the semi-circular gear ring 61. The dual-axis motor 64 is fixed to the inner side wall of the U-shaped mounting plate 63. The two output ends of the dual-axis motor 64 are fixedly connected with gears 65. Both gears 65 mesh with the semi-circular gear ring 61. When the dual-axis motor 64 rotates, the U-shaped mounting plate 63 is driven to move along the circumference of the semi-circular gear ring 61 through the meshing action of the gears 65 and the semi-circular gear ring 61.

[0030] The winding frame 66 is fixed to the outer wall of the U-shaped mounting plate 63. The winding drum 67 is rotatably installed inside the winding frame 66 through bearings at both ends. The insulating cloth 68 is tightly wound around the outside of the winding drum 67. The insulating cloth 68 is made of silicone rubber coated glass fiber cloth with a thickness of 0.4mm. It has excellent insulation performance, mechanical strength and water repellency. Its breakdown voltage is ≥20kV / mm and the surface water repellency level reaches HC1 level. The torque motor 69 is fixed to the outer wall of the winding frame 66, and its output shaft is connected to one end of the winding drum 67 via a coupling. The torque motor 69 is a permanent magnet DC torque motor, and its output torque is preset to 10 N·cm. It can automatically adjust its speed according to the tension of the insulating cloth 68 during the release process: when the insulating cloth 68 is tightened and the tension increases, the speed of the torque motor 69 automatically increases, accelerating the release speed of the insulating cloth 68; when the insulating cloth 68 is relaxed and the tension decreases, the speed of the torque motor 69 automatically decreases, reducing the release speed of the insulating cloth 68. This ensures that the insulating cloth 68 is always wound around the surface of the wire with a constant tension, without being overstretched or deformed, or becoming loose and wrinkled.

[0031] The positioning rod 610 is fixed to one side of the inner wall of the lower semi-circular insulating cylinder 1. The free end of the insulating cloth 68 is fixedly connected to the positioning rod 610. When the U-shaped mounting plate 63 moves circumferentially along the semi-circular toothed ring 61, since one end of the insulating cloth 68 is fixed, the winding drum 67 will automatically release the insulating cloth 68 under the drive of the torque motor 69, so that the insulating cloth 68 is evenly wound on the wire.

[0032] The operating principle of the present invention is described as follows: The operator holds the support sleeve 51 with one hand and pushes the support rod 53 upward through the locking plate 57 with the other hand, so that the pressure spring 56 is stretched, and the lower semi-circular insulating cylinder 1 and the upper semi-circular insulating cylinder 2 are separated relative to each other. After the support sleeve 51 and the support rod 53 are moved into position relative to each other, the handle 510 is rotated so that the U-shaped clamping plate 59 is inserted into the groove on the lower side of the locking plate 57, locking the lower semi-circular insulating cylinder 1 and the upper semi-circular insulating cylinder 2 in the fully open state. The device is lifted to the position of the conductor that needs to be insulated by the support sleeve 51, so that the conductor enters the opening between the lower semicircular insulating cylinder 1 and the upper semicircular insulating cylinder 2. The position of the device is adjusted so that the conductor segment that needs to be isolated is completely inside the cylinder. Then rotate the handle 510 to disengage the U-shaped clamping plate 59 from the slot. Under the elastic force of the pressure spring 56, the upper semi-circular insulating cylinder 2 moves downward and tightly engages with the lower semi-circular insulating cylinder 1. The semi-circular sealing gaskets 4 at both ends are pressed against the surface of the conductor to form an annular sealing structure. Then, the insulating cloth 68 winding program is started by controlling the switch. At this time, the dual-axis motor 64, torque motor 69 and servo motor 622 start working synchronously. The dual-axis motor 64 drives two gears 65 to rotate. Through the meshing of gears 65 and semi-circular gear ring 61, the U-shaped mounting plate 63 moves circumferentially along the semi-circular gear ring 61. The torque motor 69 drives the winding drum 67 to rotate, releasing the insulating cloth 68 with constant tension. The servo motor 622 drives the screw 621 to rotate. Through the threaded transmission action of screw 621 and transmission block 623, the transmission block 623 drives the semi-circular gear ring 61 to move slowly along the cylinder axis. The speeds of the dual-axis motor 64, torque motor 69, and servo motor 622 are pre-matched by the controller, so that the insulating cloth 68 is continuously and evenly wound on the wire in a spiral manner, with the winding overlap rate controlled between 30% and 50%, to ensure the formation of a continuous and gapless insulating layer. Once the insulating cloth 68 is wrapped, the dual-axis motor 64, torque motor 69, and servo motor 622 automatically stop working. At this point, the device has completed the insulation and isolation of the wires, and the operator can safely carry out subsequent live-line work. After the work is completed, press the control switch again to start the winding program. The torque motor 69 rotates in the opposite direction to rewind the insulating cloth 68 onto the winding drum 67. Then, open the device in the reverse order of the installation steps and remove it from the wire.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An insulating isolation device for live-line work on power distribution lines, comprising a lower semi-circular insulating cylinder (1) and an upper semi-circular insulating cylinder (2), characterized in that, It also includes a lifting clamping assembly (5) and an insulating cloth wrapping assembly (6); Both ends of the lower semicircular insulating cylinder (1) and the upper semicircular insulating cylinder (2) are integrally connected with semicircular extension cylinders (3). The inner wall of the semicircular extension cylinder (3) is fixed with a semicircular sealing gasket (4). After the lower semicircular insulating cylinder (1) and the upper semicircular insulating cylinder (2) are fastened together, a complete cylindrical insulating cylinder is formed. The semicircular extension cylinders (3) at both ends are fastened together to form an extended sealing section. The two semicircular sealing gaskets (4) are pressed together to form an annular sealing structure. The lifting clamping assembly (5) is fixedly connected to the outer wall of the lower semicircular insulating cylinder (1) and the upper semicircular insulating cylinder (2) on the same side. It is used to control the opening and closing of the lower semicircular insulating cylinder (1) and the upper semicircular insulating cylinder (2) and to provide a continuous clamping force to make the two stably fastened together. The insulating cloth winding assembly (6) is installed in the internal cavity of the lower semi-circular insulating cylinder (1) and the upper semi-circular insulating cylinder (2) to automatically wind a continuous insulating layer around the outer periphery of the power distribution line after the fastening is completed, forming an auxiliary insulating layer that fits the surface of the conductor without gaps.

2. The insulating isolation device for live-line work on power distribution lines according to claim 1, characterized in that, The lifting clamping assembly (5) includes a support sleeve (51), a lower connecting plate (52), a support rod (53), an upper connecting plate (54), multiple guide rods (55), multiple pressure springs (56), a locking plate (57), a U-shaped clamping plate (59), and a handle (510). The lower connecting plate (52) is fixedly connected to the middle of the outer side wall of the lower semi-circular insulating cylinder (1), and the support sleeve (51) is vertically fixed to the center of the lower surface of the lower connecting plate (52). The upper connecting plate (54) is fixedly connected to the middle of the outer side wall of the upper semi-circular insulating cylinder (2), and the support rod (53) is vertically fixed to the center of the lower surface of the upper connecting plate (54), and the support rod (53) is movably inserted into the inside of the support sleeve (51). The upper ends of multiple guide rods (55) are fixed to the lower surface of the upper connecting plate (54), and the lower ends pass through the lower connecting plate (52) and can slide relative to each other; Multiple compression springs (56) are respectively sleeved on the outside of each guide rod (55), and the upper and lower ends of the compression springs (56) are fixedly connected to the lower surface of the upper connecting plate (54) and the upper surface of the lower connecting plate (52), respectively. The locking plate (57) is fixed to the bottom end of the support rod (53). The U-shaped clamping plate (59) is rotatably connected to the lower outer wall of the support sleeve (51) via a rotating shaft (58). The inner side of the horizontal part of the U-shaped clamping plate (59) is set with an arc surface structure that matches the lower surface of the locking plate (57). The handle (510) is fixed to the lower end of the U-shaped clamping plate (59).

3. An insulating isolation device for live-line work on power distribution lines according to claim 2, characterized in that, The lower end of the locking plate (57) is provided with a slot for the U-shaped clamping plate (59) to be inserted. When the U-shaped clamping plate (59) is inserted into the slot, its upper horizontal surface is in close contact with the lower surface of the locking plate (57), locking the support rod (53) at the lowest position relative to the support sleeve (51). At this time, the lower semicircular insulating cylinder (1) and the upper semicircular insulating cylinder (2) are in a fully open state.

4. An insulating isolation device for live-line work on power distribution lines according to claim 1, characterized in that, The insulating cloth winding assembly (6) includes two semi-circular toothed rings (61), two sets of transfer assemblies (62), a U-shaped mounting plate (63), a dual-axis motor (64), two gears (65), a winding frame (66), a winding drum (67), insulating cloth (68), a torque motor (69), and a positioning rod (610). Two semicircular toothed rings (61) are respectively disposed inside the lower semicircular insulating cylinder (1) and the upper semicircular insulating cylinder (2), and a set of transfer components (62) for driving the semicircular toothed rings (61) to move along the cylinder axis is installed on the inner walls of the lower semicircular insulating cylinder (1) and the upper semicircular insulating cylinder (2). The U-shaped mounting plate (63) is slidably mounted with the semi-circular gear ring (61). The dual-axis motor (64) is fixed to the inner side wall of the U-shaped mounting plate (63). Both output ends of the dual-axis motor (64) are fixedly connected with gears (65), and both gears (65) mesh with the semi-circular gear ring (61) for transmission. The winding frame (66) is fixed to the outer wall of the U-shaped mounting plate (63), the winding drum (67) is rotatably installed inside the winding frame (66), the insulating cloth (68) is wound around the outside of the winding drum (67), the torque motor (69) is fixed to the outer wall of the winding frame (66), and its output shaft is connected to one end of the winding drum (67) for transmission. The positioning rod (610) is fixed to one side of the inner wall of the lower semi-circular insulating cylinder (1), and the free end of the insulating cloth (68) is fixedly connected to the positioning rod (610).

5. An insulating isolation device for live-line work on power distribution lines according to claim 4, characterized in that, The transfer assembly (62) includes a screw (621), a servo motor (622), a transmission block (623), and a limiting slide bar (624). The screw (621) is rotatably connected to the inner wall of the lower semicircular insulating cylinder (1) or the upper semicircular insulating cylinder (2) along the cylinder axis. The servo motor (622) is fixed to the end of the inner wall of the cylinder, and its output shaft is connected to one end of the screw (621) for transmission. The transmission block (623) is fixed to the outer wall of the semi-circular gear ring (61). The transmission block (623) has a threaded hole that matches the screw (621). The transmission block (623) and the screw (621) are connected by a threaded transmission. The limiting slide rod (624) is parallel to the screw rod (621) and fixed to the inner wall of the cylinder. The transmission block (623) is provided with a limiting slide hole that is slidably sleeved with the limiting slide rod (624).

6. An insulating isolation device for live-line work on power distribution lines according to claim 4, characterized in that, The opposite side walls of the semicircular toothed ring (61) are provided with arc-shaped sliding grooves (611), and the inner sides of both ends of the U-shaped mounting plate (63) are fixed with arc-shaped sliders (612) that are slidably connected to the arc-shaped sliding grooves (611).

7. An insulating isolation device for live-line work on power distribution lines according to claim 1, characterized in that, The semi-circular sealing gasket (4) is made of EPDM rubber with a Shore hardness of 40 to 50. Its inner wall is provided with multiple concentric annular sealing ridges. When the upper and lower semi-circular sealing gaskets (4) are pressed together, the annular sealing ridges are tightly attached to the surface of the power distribution line to form multiple sealing defenses.

8. An insulating isolation device for live-line work on power distribution lines according to claim 4, characterized in that, The torque motor (69) is a permanent magnet DC torque motor, which can automatically adjust the speed according to the tension of the insulating cloth (68) during the release process. When the tension increases, the release speed is automatically increased, and when the tension decreases, the release speed is automatically decreased, so that the insulating cloth (68) is always wrapped around the surface of the power distribution line with a constant tension.

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