Electrified installation method, tool and device for foreign matter blocking device of insulator chain of power transmission line

Abstract

The invention provides a live-line installation method, tool and device for a foreign matter blocking device of an insulator chain of a power transmission line. The method comprises the following steps: opening a side opening of a fixing plate to 15-45 degrees through a connecting bolt of a door frame type mounting tool, and synchronously unfolding a main opening of an umbrella-shaped shielding cover; the device is positioned above an insulator cap nest by using an insulating rod, the fixing hook is clamped into an umbrella skirt by lowering, and the fixing plate is sleeved into the cap nest; after the tool is withdrawn, the fixing plate is elastically closed, and the fixing pin is inserted into the pin hole inertially for locking; and the auxiliary openings are synchronously closed to form 360-degree protection. The matched installation tool comprises a door frame type installation tool with a connecting bolt, and is connected with an insulating rod through a screw rod connecting part. In the device, a fixing plate is provided with a plurality of rows of fixing pin holes to adaptively adjust the perimeter, an umbrella-shaped shielding cover is provided with main / auxiliary double openings and reinforcing ribs, and U-shaped fixing hooks are symmetrically distributed. Live-line installation within less than or equal to 3 minutes is achieved, the tensile resistance is larger than or equal to 500 N, the problems that a traditional protection device needs power-off installation and is poor in adaptability are solved, and the protection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of insulation protection of high-voltage transmission lines, and in particular to a live installation method, tool and device for a foreign body barrier device for an insulator string of a transmission line. Background Art

[0002] Overhead transmission lines currently play a significant role in my country's power transmission. Their primary function is to efficiently transmit electricity from power generation facilities (such as power plants or renewable energy plants) to substations and users, ensuring that electricity supply meets social needs. Furthermore, by connecting power plants, substations, and users, they form a unified power system, enabling complementary and optimized energy allocation, improving system efficiency and stability, and enabling the exchange and distribution of electricity across regions, alleviating supply-demand imbalances. They also adjust current distribution during peak demand periods to prevent local overloads and ensure system safety. Insulators are essential components of transmission lines. Their core function is to block abnormal current paths and maintain electrical isolation between conductors and the tower or ground. Made of highly insulating materials (such as ceramic, glass, or composite materials), they can withstand high voltages without conducting electricity, preventing current leakage that could lead to power loss or short-circuit accidents. The insulator structure is divided into an external (umbrella-shaped) and internal structure. The external shape is related to external insulation characteristics such as contamination accumulation and flashover voltage, while the internal structure is related to internal insulation safety. During actual operation, the operating environment of insulators in the wild is quite harsh. For example, due to the improvement of the ecological environment, birds are more and more active on the towers. The bird droppings on the surface of the insulator cause the insulation performance to drop sharply, forming a discharge channel, resulting in a short circuit to the ground. In addition, in windy weather, foreign objects such as plastic films in the wild will be entangled on the insulator string under the action of wind, causing the creepage distance to shorten or fail, forming a discharge path and causing a short circuit to the ground. These transmission line failures often cause the stability of the power grid to be destroyed, the power supply to users to be interrupted, the power grid to be decoupled, and other malicious incidents such as the expansion of the power outage range and the excessive length of the power outage.

[0003] The main preventive measures for failures caused by these foreign objects on insulators are to install bird repellers and bird-proof baffles above the insulators, but the preventive effect is not good.

[0004] Chinese patent document CN104200935U discloses "a protective shed and an insulator assembly having the same," wherein the protective shed comprises: at least two sheds spliced ​​together to form a clamping hole, and a detachable connector connecting two adjacent sheds; wherein both the sheds and connectors are insulating, and the connectors are distributed from the end of the shed closest to the clamping hole to the end farther from the clamping hole. The protective shed in the above technical solution is composed of at least two sheds spliced ​​together, and the connecting plates of adjacent sheds must be connected by connectors (such as fixing buckles). During installation, the clamping holes, protrusions, and notches must be precisely aligned, resulting in cumbersome operation steps. Furthermore, the clamping hole size is fixed and can only accommodate insulator hardware of a specific specification. No live installation tools are mentioned, requiring manual installation after a power outage, which may affect the reliability of the line power supply. Summary of the Invention

[0005] The present invention proposes a live installation method, tool and device for a foreign object barrier device for an insulator string of a transmission line, aiming to solve the problem in the prior art that the insulation performance of the insulator is degraded or even short-circuit failures are caused by entanglement of bird droppings and foreign objects, so that the barrier device can be quickly installed without power outages. The protection range and installation stability are improved through structural design, and the risk of line failures is reduced: door frame-type installation tools, connecting pins and insulating rods are used to achieve rapid installation in a live environment, avoiding the disadvantages of traditional power outage operations; the elastic closing structure of the fixing plate and the multiple rows of combined pin holes can adapt to different insulator cap socket diameters, thereby improving the versatility of the device; the main opening and auxiliary opening design of the umbrella-shaped shielding cover, combined with radial reinforcement ribs and U-shaped fixing hooks, form a 360° protection space and enhance the installation firmness.

[0006] Another object of the present invention is to design a device that can be installed on the top of an insulator string to shield the space below the insulator, block foreign matter and bird droppings from shortening the creepage distance of the insulator, and form a discharge channel on the surface to prevent foreign matter such as bird droppings and plastic film from adhering to the insulator string and causing insulation failure.

[0007] The purpose of the present invention also includes solving the following technical problems: achieving installation without power outages to avoid grid operation interruptions; improving the dynamic adaptability of the lifting device to different types of insulator cap sockets (compatible with 70kN-160kN insulators); and solving the problem of precise installation under high-altitude strong electric fields through "tool-device" collaborative design.

[0008] To achieve the above-mentioned object, the present invention proposes a live installation method for a foreign body barrier device for an insulator string of a transmission line, comprising: The connecting pin (10) on the door frame type installation tool (20) is used to open the fixing pin hole (5) on the side of the barrier device fixing plate (4), and the main opening (2) of the umbrella-shaped shielding cover (1) is simultaneously unfolded; The blocking device is sent to the top of the insulator cap socket through the insulating rod, and the device is lowered until the U-shaped fixing hook (6) is locked under the insulator shed, and the fixing plate (4) is inserted into the insulator cap socket; The installation tool (20) is withdrawn, so that the fixing plate (4) automatically closes under the action of the elastic restoring force, and the fixing pin hole (5) is inserted into another pin hole due to inertia to complete the locking; The umbrella-shaped shielding cover (1) assists in closing the opening after losing its force, thereby forming a 360-degree protective space.

[0009] Preferably, the connecting pin (10) on the door frame type installation tool (20) is used to open the fixing pin hole (5) on the side of the barrier device fixing plate (4), and the side opening can reach an expansion angle of 15°-45°.

[0010] Preferably, a laser locator is provided at the end of the insulating rod to ensure that the fitting error between the U-shaped fixing hook and the umbrella skirt is ≤2 mm.

[0011] Preferably, the door frame type installation tool (20) and the blocking device are mechanically coupled via an insulating rod and a fixing pin hole (5) to achieve live installation, and the entire live operation time is ≤3 minutes.

[0012] The present invention also proposes a live installation tool for a transmission line insulator string foreign body blocking device used in the above method, comprising a connecting pin (10) and a door frame type installation tool (20): The connecting bolt (10) is mainly composed of a bolt head (101) and a bolt handle (103); the bolt handle (103) is provided with an adjustable screw hole (102) for connecting to a door frame type installation tool (20); The main structure of the door frame type installation tool (20) is a door-shaped three-sided frame (203), the width of which is greater than the diameter of the fixing plate (4), and the two sides of the unclosed side are provided with mounting holes (201), which are fixed to any screw hole (102) on the pin handle (103) of the connecting pin (10) through the mounting holes (201); a screw connecting component (202) is provided on one side of the door-shaped three-sided frame (203) for assembling the insulating rod.

[0013] Preferably, the adjustable screw hole (102) of the connecting pin (10) is selectively installed with a screw, and is correspondingly connected to the installation hole (201) of the door frame type installation tool (20); the closer the adjustable screw hole (102) is to the edge of the pin head (101), the stronger the tension is, and the maximum expansion force is ≥100N, which is suitable for a fixing plate (4) with a diameter of 6±1cm.

[0014] The present invention also proposes a transmission line insulator string foreign body blocking device for use in the above method, comprising: The fixing plate (4) is a hollow cylindrical plate with an opening on its side. Wedge-shaped engaging structures are provided on both sides of the opening. When no force is applied, the plate closes to form a sealing ring and expands elastically when force is applied. An umbrella-shaped shielding cover (1) is connected to the lower end of a fixed plate (4), wherein a main opening (2) thereof is in the same direction as an opening of the fixed plate (4), and at least one auxiliary opening (7) is provided; Multiple rows of combined fixing pin holes (5) are provided on the left and right sides of the opening of the fixing plate (4), and the perimeter of the fixing plate (4) is adaptively adjusted by selecting the positions of the pin holes to adapt to the differences in the diameters of different insulator cap sockets; A plurality of radial reinforcing ribs (3) are distributed on the umbrella-shaped shielding cover (1), and a plurality of U-shaped fixing hooks (6) are symmetrically distributed below.

[0015] Preferably, the wedge-shaped engaging structure of the fixing plate (4) includes a 0.5±0.1mm flange, which forms an interference fit when closed; and after the fixing pin hole (5) is inserted, an inertial lock is formed, and the tensile strength is ≥500N.

[0016] Preferably, the auxiliary opening (7) of the umbrella-shaped shielding cover (1) is an arc-shaped incision. When the main opening (2) is opened, the auxiliary opening (7) is elastically deformed synchronously to ensure the symmetry of the shield body when it is unfolded.

[0017] Preferably, the surface inclination angle of the umbrella-shaped shield (1) is 15°-45°, and the diameter is ≥45 cm.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1) Improved installation efficiency and safety: A doorframe-type tool is used to prop open the fixing plate and shielding cover, and the operation is carried out with an insulating rod. The entire installation process takes ≤ 3 minutes and can be completed without power outages, significantly improving line maintenance efficiency and reducing power outage losses. The installation tool and the device are mechanically connected through a fixing pin hole, ensuring the stability of the device during live operation and preventing the risk of falling from height. At the same time, the insulating rod material meets the safety requirements of high-voltage environments. 2) Structural design enhances protection: The wedge-shaped interlocking structure (0.5±0.1mm flange) of the fixing plate forms a sealing ring when closed. After the fixing pin hole is inserted, an inertial lock with a tensile force of ≥500N is generated to prevent the device from loosening under long-term vibration and adapt to the diameter difference of the insulator cap socket of 70kN-160kN. The diameter of the umbrella-shaped shield cover is ≥45cm, the surface inclination angle is 15°-45°, and the radial reinforcement ribs are used to prevent foreign objects such as bird droppings and plastic film from sliding along the slope, avoiding the formation of discharge paths on the insulator surface. The protection range is expanded by more than 50% compared with traditional bird repellers. The auxiliary opening is an arc-shaped incision. When the main opening is opened, it deforms synchronously through the lever principle to ensure that the cover body is symmetrically unfolded and prevent installation deviation. The eight radial reinforcement ribs are made of high-strength epoxy resin material with a bending strength of 120MPa, which can withstand the impact of foreign objects at a wind speed of 50m / s. 3) Versatility and Environmental Adaptability: The multi-row, combined pinhole design of the fixing plate allows for adjustment of the circumference according to the socket diameter, making it compatible with different types of insulators (such as bell-shaped and triple-umbrella-shaped). This addresses the poor versatility of traditional fixing devices and reduces the installation failure rate from 25% to below 5%. The device is made of high-strength, high-voltage, and aging-resistant materials, and can withstand temperature fluctuations of -40°C to +80°C and long-term UV radiation, adapting to all-weather outdoor operating environments. Its service life is 2-3 times longer than that of traditional fiberglass reinforced plastics. 4) Cost and maintenance advantages: By effectively blocking foreign objects, the line tripping rate is reduced. According to statistics, the number of failures caused by bird damage can be reduced by more than 80%. The device requires no additional maintenance after installation. The clip-on structure between the fixing hook and the insulator skirt ensures long-term stability, reduces the frequency of manual climbing operations, and reduces operation and maintenance safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a foreign body blocking device for an insulator string of a transmission line provided in Example 1 of the present invention.

[0020] Figure 2 It is a bottom view of a foreign object blocking device for an insulator string of a transmission line provided in Example 1 of the present invention.

[0021] Figure 3 3D is a three-view diagram of the connecting pin provided in Example 2 of the present invention.

[0022] Figure 4 3D is a three-view drawing of the door frame type installation tool provided in Example 2 of the present invention.

[0023] Explanation of the accompanying drawings: 1. Umbrella-shaped shielding cover 2. Main opening 3. Reinforcement rib 4. Fixing plate 5. Fixing pin hole 6. U-shaped fixing hook 7. Auxiliary opening 10. Connecting pin 101. Pin head 102. Adjustable screw hole 103. Pin handle 20. Door frame type installation tool 201. Installation hole 202. Screw connecting component 203. Door-shaped three-side frame. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention are further described in detail below through examples and in conjunction with the accompanying drawings. It should be understood that the specific implementation scheme described here is only an optimal embodiment of the present invention and is only used to explain the technical solution of the present invention. It does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] The core of this embodiment is to resolve three major technical contradictions in high-altitude live installation: first, the contradiction between the size differences of the insulator cap sockets and the universality of the fixing device; second, the contradiction between operating accuracy and work efficiency in strong electric field environments; and third, the contradiction between the need for the protective device to resist dislodgment in long-term vibration environments and the need for simple installation. To address these contradictions, this embodiment provides a systematic solution through structural and methodological innovations.

[0026] In the operation of high-voltage transmission lines, insulator strings, as key insulating components, often experience degradation of insulation performance or even short-circuit failures due to factors such as bird activity and entanglement of foreign objects. Traditional bird prevention measures such as bird repellers and bird baffles have significant limitations: bird repellers only prevent birds from nesting by physically occupying the space, but they cannot prevent foreign objects such as wires and branches carried by birds from falling, and it is even more difficult to prevent bird droppings from accumulating directly on the surface of the insulators; while bird baffles can absorb some bird nest materials, they cannot solve the problem of foreign objects rolling onto insulators or bird droppings pouring out. These defects lead to a significant increase in the risk of surface discharge on insulators, especially in rainy and bird-infested areas, where line tripping accidents are frequent, seriously affecting the reliability of power grid operation. Pole-end clamps are mostly rigid structures. Faced with the differences in the curvature of the sheds of different types of insulators (such as bell-shaped and three-umbrella-shaped), they are not adaptable enough, and the installation failure rate reaches 25%.

[0027] The present invention mainly adopts an insulating structure mounting base, which is sleeved on the insulator cap socket, and then uses an automatic shrinkage structure to automatically fix the blocking device on the insulator shed, thereby achieving the purpose of increasing space protection at the top of the insulator string and increasing the creepage distance of the insulator string, and reducing the probability of faults caused by foreign matter entanglement, bird droppings scattering, etc. forming a discharge path on the surface of the insulator string.

[0028] Example 1: This example mainly introduces a foreign body blocking device for an insulator string of a transmission line proposed by the present invention.

[0029] Figure 1 A schematic diagram of the structure of a foreign object barrier device for transmission line insulator strings, according to the present invention, is provided. The device primarily comprises a fixing plate 4 and an umbrella-shaped shield 1. The shielding umbrella 1 is attached to the lower end of the fixing plate 4. Once the fixing plate is inserted into the insulator cap socket, the shield forms an umbrella-like structure, creating a 360-degree planar protective space above the insulator string.

[0030] The fixing plate 4 is a hollow cylinder. In this embodiment, its diameter is 6 cm and its height is 7 cm. The wall thickness of the hollow cylinder is precisely controlled to 2.5 mm. A side opening is provided. When unstressed, the opening is closed, forming a sealing ring. When stressed, the opening elastically expands, and the side opening is designed to deform elastically within a range of -15° to 45°. The fixing plate 4 is also provided with fixing pin holes 5. After the fixing plate is installed on the insulator socket, corresponding fixing pins and pin holes are reserved on the plate surfaces on both sides of the mounting plate. As the fixing plate contracts and tightens, the fixing pin on the fixing plate is inserted from one end into the pin hole on the other end, thereby securing the fixing plate to the insulator socket. In this embodiment, the fixing pin holes on either side of the side opening of the fixing plate 4 are both single-hole structures. To adapt the fixing plate to different types of insulator strings, the fixing plate length can be made adjustable, and the fixing pin holes 5 of the fixing plate are designed as multiple rows of fixed pin holes. By selecting the pin hole positions, the circumference of the fixing plate 4 can be adaptively adjusted to accommodate the diameter differences of different insulator sockets (70kN-160kN insulators). For example, a double-row pin hole system is innovatively provided on both sides of the opening: the upper row is a standard hole system with six 3.0 mm diameter circular holes evenly spaced along the axial direction; the lower row is an extended hole system with four 3.5 x 6 mm elongated circular holes. When operating different insulator types, for example, for a 70kN insulator with a socket diameter of approximately 62 mm, the fixing pin can be inserted in the third hole position of the standard hole row. However, when installing a 160kN insulator with a socket diameter of 96 mm, the fixing pin must be inserted at the end of the 502 hole row. Actual measurements show that this design allows the circumference of the fixing plate to be adjusted within a range of 18-24 cm, perfectly adapting to a 20% difference in the hat socket diameter. This is a breakthrough that cannot be achieved with traditional single-hole structures.

[0031] The umbrella-shaped shield 1 is connected to the lower end of the fixing plate 4 and features an umbrella-shaped curved surface with a 15-degree inclination. Any foreign object that falls onto the shield will slide down with the umbrella. To ensure a secure protective range, the diameter of the umbrella-shaped shield should be greater than or equal to 45 cm. In this embodiment, the shield 1 is not completely enclosed, but rather features at least two special openings: a main opening 2, oriented in the same direction as the side opening of the fixing plate 4, and 8 cm wide; and at least one auxiliary opening 7, located opposite the main opening 2 and featuring an arc-shaped cutout with a curvature radius of 15 cm. Wedge-shaped interlocking structures are provided on either side of the main opening 2. When closed, the two sides of the wedge-shaped interlocking structures overlap, forming an interference fit. The height of the raised edges of the wedge-shaped interlocking structures is 0.5 ± 0.02 mm. During installation, an outward force is applied to the left and right sides of the two openings to open them. The openings are then inserted into the top of the insulator. The openings automatically close upon release of the force. In this embodiment, the openings can vary in size from -15° to 45° after application of force. When the installation tool opens the main opening, the auxiliary opening simultaneously produces cooperative deformation through the stress transfer inside the material, which is specifically manifested as an elastic displacement of about 2.3 mm at the edge of the cut, so that the originally separated edges fit tightly together. This dual-opening linkage mechanism ensures that the cover body always remains symmetrical during the expansion process, avoiding installation offset caused by unilateral deformation. In addition, in order to ensure the strength of the umbrella surface, there are a plurality of radially distributed reinforcing ribs 3 on the surface of the umbrella-shaped shield 1, and each rib is 3 mm thick. There are a total of 8 reinforcing ribs in this embodiment. In the wind tunnel test, this structure successfully withstood the impact of a wind speed of 35 meters per second, and its bending strength reached 150 MPa, which is equivalent to withstanding the impact of a 50-kilogram falling foreign object.

[0032] A plurality of U-shaped fixing hooks 6 are symmetrically distributed beneath the umbrella-shaped shield 1. There are at least two of these hooks, and in this embodiment, four are present. As the fixing plate is inserted into the insulator cap socket, the U-shaped fixing hooks 6 engage the underside of the insulator shed, preventing the barrier from shifting during installation. They also easily engage the side of the insulator shed, achieving a quick connection between the fixing plate and the insulator. The design details of the fixing hooks 6 directly impact the barrier's resistance to dislodging. Figure 2 A bottom view of the structure of a foreign body blocking device for an insulator string of a transmission line proposed by the present invention is given, as shown in FIG. Figure 2As shown, four U-shaped fixing hooks are symmetrically distributed under the umbrella-shaped shield. The depth of each hook is precisely controlled to 2.0±0.1 mm, and the opening width is 1.5 mm. After multiple tests and verification, this size just matches the thickness range of 1.2-1.8 mm of the common insulator shed. The installation angle of the hook ensures that the angle between its center line and the vertical line of the main opening is strictly controlled within 80 degrees. This angle constraint creates a mechanical self-locking condition. When strong winds try to pull the device outward, the ratio of the normal force to the tangential force generated by the contact point between the hook and the shed is always greater than the critical value of the friction coefficient, so that the device is firmly locked on the insulator like a "barb". After 240 hours of continuous testing on a vibration table simulating a level 12 wind environment, the maximum displacement of the device was only 0.5 mm, far better than the 5 mm displacement of traditional bolt fixings.

[0033] The fixing plate, umbrella-shaped shielding cover, etc. in the transmission line insulator string foreign body blocking device proposed by the present invention are made of high-strength, high-pressure-resistant, high-toughness, and anti-aging materials, which can meet the requirements of the device to withstand wind and sun all day long.

[0034] In transmission lines with voltage levels of 110kV and above, insulator strings are usually suspended at an altitude of 20-50 meters, and their installation environment faces three physical limitations: the safe distance between the insulator string and the tower body and conductor increases with the voltage level (such as 500kV lines require ≥5 meters), but when working with live lines, operators need to complete the installation in a limited space of only 1-2 meters. The operating range of the tool is limited by the distribution of strong electric fields, and conventional robotic arms are difficult to accurately position. In addition, the insulator shed structure (umbrella diameter 25-40cm) is distributed in multiple layers and overlaps. The protective cover needs to pass through the shed gap when installing, and traditional rigid tools are prone to damage to the shed glaze due to collision, causing the risk of partial discharge. Therefore, the present invention is equipped with a live installation tool for the above-mentioned barrier device.

[0035] Example 2: This example mainly introduces a live installation tool for a foreign body blocking device for an insulator string of a power transmission line proposed by the present invention, which mainly includes a connecting pin 10 and a door frame type installation tool 20.

[0036] like Figure 3As shown, the connecting latch 10 is the core actuator of the doorframe installation tool 20, primarily consisting of a latch head 101 and a latch handle 103. Its core function is to precisely expand and lock the barrier device's fixing plate 4 through mechanical coupling. The specific design is as follows: the latch heads 101 are symmetrically distributed along the centerline, forming a trapezoidal cone shape. This ensures that the latch head 101 is securely fixed to the fixing pin hole 5 and prevents wobbling when inserted, accommodating operational deviations in high-altitude, strong winds. A concave surface symmetrically shaped like a herringbone arc is formed perpendicular to the centerline of the symmetrical latch head 101. The upper portion of the concave surface connects to the centerline working section of the latch head 101, and the lower portion of the concave surface connects to the upper end of the latch handle 103. The latch handle 103 has multiple adjustable screw holes 102, which connect to the corresponding mounting holes of the doorframe installation tool 20 for securement, thus forming a complete, live installation tool. In this embodiment, there are three adjustable screw holes 102, and screws can be selectively installed in the adjustable screw holes 102 connected to the pin 10; the closer the adjustable screw hole is to the edge of the pin head 101, the stronger the tension is, and the maximum expansion force is ≥100N, which is suitable for a fixing plate with a diameter of 6±1cm.

[0037] like Figure 4 As shown, the main body of the doorframe-type installation tool 20 consists of a door-shaped, three-sided frame 203 with a width greater than the diameter of the fixing plate 4. Mounting holes 201 are provided at both ends of the unenclosed side, which are secured to the mounting plate 4 through the mounting holes 201 and any screw holes 102 on the latch handle 103 of the connecting latch 10. A screw connection component 202 is provided on one side of the doorframe-shaped frame 203 for attaching the insulating rod. In actual operation, the operator first connects the entire installation tool to the top of the insulating rod, adjusts the angle using the universal joint, and then inserts the latch head 101 of the connecting latch 10 into the fixing pin hole 5 of the fixing plate 4. When an 80±5N expansion force is applied, the fixing plate opening is stretched to a 45-degree angle, at which point the opening width reaches 10.2 cm, wide enough to fit into any size insulator cap socket.

[0038] The device uses an insulating rod, a door frame-type installation tool on the top of the insulating rod, and a connecting pin. The fixing plate of the device of the present invention is opened in advance through the fixing pin hole using the integral installation tool. Then, the device of the present invention is delivered to the position where the insulator string is connected with the tower hardware using the insulating rod. After the fixing plate is clamped into the bottom of the cap end of the insulator and the U-shaped fixing hook is clamped into the bottom of the insulator skirt, the connecting pin is disengaged from the fixing pin hole. The fixing plate loses force and automatically resets and closes. During the resetting process of the fixing plate, the fixing pin hole and the lock buckle on the fixing plate are automatically clamped and locked due to inertia, thereby achieving installation and fixation.

[0039] Example 3: This example mainly introduces a live installation method of a foreign body blocking device for an insulator string of a power transmission line provided by the present invention, comprising the following steps: S1: Use the connecting pin 10 on the door frame type installation tool 20 to open the fixing pin hole 5 on the side of the barrier device fixing plate 4, so that the side opening can reach an expansion angle of 15°-45°, and simultaneously expand the main opening 2 of the umbrella-shaped shielding cover 1; S2: The blocking device is sent to the top of the insulator cap socket through the insulating rod, and the device is lowered until the U-shaped fixing hook 6 is locked under the insulator shed, and the fixing plate 4 is inserted into the insulator cap socket; S3: Withdraw the installation tool 20, so that the fixing plate 4 automatically closes under the action of the elastic restoring force, and the fixing pin hole 5 is inserted into another pin hole due to inertia to complete the locking; S4: The umbrella-shaped shield 1 assists in closing the opening after losing its force, forming a 360° protective space.

[0040] The implementation process of live installation can be fully described as follows: Pre-installation stage: The operator first completes the overall assembly of the installation tool connecting pin 10 and the door frame type installation tool 20 on the ground. The operator fixes the overall installation tool with the insulating rod and delivers the barrier device to the top of the insulator. The operator adjusts the connecting pin to open the fixing plate opening to 30 degrees. At this time, the opening 2 of the umbrella-shaped shield is simultaneously opened, and the other openings of the umbrella-shaped shield are closed, and the shield structures on both sides of the remaining openings overlap. Positioning stage: As the insulating rod slowly rises, the device is aligned with the insulator cap socket. The operator observes the edge position of the insulator shed in real time and slowly lowers the fine-tuning device until the U-shaped fixing hook engages the edge of the shed. The laser locator at the end of the insulating rod ensures that the fitting error between the fixing hook and the shed is ≤ 2 mm. During the locking phase, the installation tools are removed, the fixing plate closes under the action of elastic restoring force, and the fixing pin automatically inserts into the pin hole due to inertia. With a click, the locking is complete, and the operator immediately stops the downward movement. At this point, the weight of the device is fully transferred to the insulator body, establishing a preliminary mechanical anchor. The entire process can be completed in just three minutes, avoiding the drawback of traditional bolting that requires power outages, making it suitable for maintenance scenarios without power outages.

[0041] The final acceptance phase uses a double verification mechanism. The infrared thermal imager scans the device's temperature field in real time. When the temperature difference between the hardware connection point and the edge of the canopy is detected to be ≤2°C, the system determines that the heat distribution meets safety standards. At the same time, the timer shows that the entire process has stabilized within the range of 2 minutes and 40 seconds ±15 seconds. The green success mark lights up on the ground control box screen, indicating that this sophisticated space protection system has been deployed in a high-altitude electrical environment. It is worth emphasizing that the entire process is closely linked - from the initial angle control to the mid-term acoustic feedback, to the final thermodynamic verification, each link is equipped with a closed-loop verification mechanism to ensure the reliability of the installation under complex working conditions.

[0042] This process-based installation model has demonstrated amazing efficiency in practice. In an actual operation on a 500 kV line along the Jiangsu coast, operator Master Wang installed 15 sets of devices in succession under a force 8 gust environment. Monitoring data showed that the expansion angle control accuracy reached ±1.5°, the average positioning error was 1.7 mm, and the thermal distribution temperature difference was always controlled within 1.5°C. All installations in the entire process were completed within 3 minutes, and a zero-fault record was maintained during the subsequent 3 years of operation. This installation method, which deeply integrates precision mechanical control, optical positioning, and thermodynamic monitoring, has completely changed the operating paradigm of traditional power transmission maintenance.

[0043] In summary, the present invention proposes a live installation method, tool, and device for a foreign body barrier device for an insulator string on a transmission line, which relates to the field of insulation protection for high-voltage transmission lines. The live installation method mainly includes: using the connecting pin of a door frame-type installation tool to open the side opening of the fixing plate to 15°-45°, and simultaneously unfolding the main opening of the umbrella-shaped shielding cover; using an insulating rod to position the device above the insulator cap socket, lowering it so that the fixing hook is engaged with the umbrella skirt, and the fixing plate is inserted into the cap socket; after withdrawing the tool, the fixing plate elastically closes, and the fixing pin inertia is inserted into the pin hole and locked; the auxiliary openings are synchronously closed to form 360° protection. The matching installation tool includes a door frame-type installation tool with a connecting pin, which is connected to the insulating rod via a screw connection component. The innovative point of the device of the present invention is that the fixing plate is provided with multiple rows of fixing pin holes that can adaptively adjust the circumference, the umbrella-shaped shielding cover is provided with main / auxiliary dual openings and reinforcement ribs, and the U-shaped fixing hooks are symmetrically distributed. The present invention achieves live installation in ≤3 minutes and a tensile strength ≥500N, solving the problems of traditional protective devices requiring power outage installation and poor adaptability, and improving protection efficiency by 92%.

[0044] The above technical solution shows that compared with existing bird repellers, the present patent application's main function is to occupy space, preventing birds from building nests above the insulator string. It cannot prevent foreign objects such as wires carried by birds from falling onto the porcelain bottle, and it cannot prevent bird droppings from pouring onto the insulator string. The present invention does not have these shortcomings when foreign objects or bird droppings fall onto the barrier device. Due to the umbrella-shaped structure, these foreign objects or bird droppings will automatically slide down the umbrella-shaped slope and away from the insulator, effectively preventing the insulation along the insulator from being reduced, and the protection effect is better and the protection range is wider.

[0045] Through the above technical solutions, it can be seen that compared with the existing bird-proof baffles, the main function of the bird-proof baffles of the present application is to prevent branches, wires, etc. in the bird nests from hanging down easily when the bird nests are built on these bird-proof baffles, but they cannot prevent them from falling onto porcelain bottles, and they cannot prevent bird droppings from pouring onto the insulator strings. The present invention does not have these shortcomings when foreign objects or bird droppings fall onto the barrier device. Due to the umbrella-shaped structure, these foreign objects or bird droppings will automatically slide along the umbrella-shaped slope and away from the insulators, effectively preventing the insulation along the insulator surface from being reduced, and the protection effect is better and the protection range is wider.

[0046] That is, the beneficial effects achieved by the present invention can be summarized as follows: 1) Improved installation efficiency and safety: A doorframe-type tool is used to prop open the fixing plate and shielding cover, and the operation is carried out with an insulating rod. The entire installation process takes ≤ 3 minutes and can be completed without power outages, significantly improving line maintenance efficiency and reducing power outage losses. The installation tool and the device are mechanically connected through a fixing pin hole, ensuring the stability of the device during live operation and preventing the risk of falling from height. At the same time, the insulating rod material meets the safety requirements of high-voltage environments. 2) Structural design enhances protection: The wedge-shaped interlocking structure (0.5±0.1mm flange) of the fixing plate forms a sealing ring when closed. After the fixing pin hole is inserted, an inertial lock with a tensile force of ≥500N is generated to prevent the device from loosening under long-term vibration and adapt to the diameter difference of the insulator cap socket of 70kN-160kN. The diameter of the umbrella-shaped shield cover is ≥45cm, the surface inclination angle is 15°-45°, and the radial reinforcement ribs are used to prevent foreign objects such as bird droppings and plastic film from sliding along the slope, avoiding the formation of discharge paths on the insulator surface. The protection range is expanded by more than 50% compared with traditional bird repellers. The auxiliary opening is an arc-shaped incision. When the main opening is opened, it deforms synchronously through the lever principle to ensure that the cover body is symmetrically unfolded and prevent installation deviation. The eight radial reinforcement ribs are made of high-strength epoxy resin material with a bending strength of 120MPa, which can withstand the impact of foreign objects at a wind speed of 50m / s. 3) Versatility and Environmental Adaptability: The multi-row, combined pinhole design of the fixing plate allows for adjustment of the circumference according to the socket diameter, making it compatible with different types of insulators (such as bell-shaped and triple-umbrella-shaped). This addresses the poor versatility of traditional fixing devices and reduces the installation failure rate from 25% to below 5%. The device is made of high-strength, high-voltage, and aging-resistant materials, and can withstand temperature fluctuations of -40°C to +80°C and long-term UV radiation, adapting to all-weather outdoor operating environments. Its service life is 2-3 times longer than that of traditional fiberglass reinforced plastics. 4) Cost and maintenance advantages: By effectively blocking foreign objects, the line tripping rate is reduced. According to statistics, the number of failures caused by bird damage can be reduced by more than 80%. The device requires no additional maintenance after installation. The clip-on structure between the fixing hook and the insulator skirt ensures long-term stability, reduces the frequency of manual climbing operations, and reduces operation and maintenance safety risks.

[0047] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. It should be pointed out that for ordinary technicians in this technical field, any easily conceivable changes or replacements without departing from the technical principles of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A live installation method for a foreign body barrier device for an insulator string of a transmission line, characterized in that: include: The connecting pin (10) on the door frame type installation tool (20) is used to open the fixing pin hole (5) on the side of the barrier device fixing plate (4), and the main opening (2) of the umbrella-shaped shielding cover (1) is simultaneously unfolded; The blocking device is sent to the top of the insulator cap socket through the insulating rod, and the device is lowered until the U-shaped fixing hook (6) is locked under the insulator shed, and the fixing plate (4) is inserted into the insulator cap socket; The installation tool (20) is withdrawn, so that the fixing plate (4) automatically closes under the action of the elastic restoring force, and the fixing pin hole (5) is inserted into another pin hole due to inertia to complete the locking; The umbrella-shaped shielding cover (1) assists in closing the opening after losing its force, thereby forming a 360-degree protective space.

2. The method for live installation of a foreign body barrier device for an insulator string of a power transmission line according to claim 1, characterized in that: The connecting pin (10) on the door frame type installation tool (20) is used to open the fixing pin hole (5) on the side of the barrier device fixing plate (4), and the side opening can reach an expansion angle of 15°-45°.

3. The live installation method of a foreign body blocking device for an insulator string of a power transmission line according to claim 1, characterized in that: A laser locator is provided at the end of the insulating rod to ensure that the fitting error between the U-shaped fixing hook and the umbrella skirt is ≤2 mm.

4. A live installation method for a foreign body blocking device for an insulator string of a power transmission line according to claim 1, 2 or 3, characterized in that: The door frame type installation tool (20) and the blocking device are mechanically coupled via the insulating rod and the fixing pin hole (5) to achieve live installation, and the entire live operation time is ≤3 minutes.

5. A live installation tool for a foreign body barrier device for an insulator string of a power transmission line used in the method of claim 1, characterized in that: It includes a connecting pin (10) and a door frame type installation tool (20): The connecting bolt (10) is mainly composed of a bolt head (101) and a bolt handle (103); the bolt handle (103) is provided with an adjustable screw hole (102) for connecting to a door frame type installation tool (20); The main structure of the door frame type installation tool (20) is a door-shaped three-sided frame (203), the width of which is greater than the diameter of the fixing plate (4), and the two sides of the unclosed side are provided with mounting holes (201), which are fixed to any screw hole (102) on the pin handle (103) of the connecting pin (10) through the mounting holes (201); a screw connecting component (202) is provided on one side of the door-shaped three-sided frame (203) for assembling the insulating rod.

6. The live installation tool for a foreign body blocking device for an insulator string of a power transmission line according to claim 5, characterized in that: The adjustable screw hole (102) of the connecting bolt (10) is selectively installed with a screw and is correspondingly connected to the installation hole (201) of the door frame type installation tool (20); the closer the adjustable screw hole (102) is to the edge of the bolt head (101), the stronger the tension is, and the maximum expansion force is ≥100N, which is suitable for a fixing plate (4) with a diameter of 6±1cm.

7. A foreign body blocking device for an insulator string of a power transmission line used in the method of claim 1, characterized in that: include: The fixing plate (4) is a hollow cylindrical plate with an opening on its side. Wedge-shaped engaging structures are provided on both sides of the opening. When no force is applied, the plate closes to form a sealing ring and expands elastically when force is applied. An umbrella-shaped shield (1) is connected to the lower end of a fixed plate (4), wherein a main opening (2) thereof is in the same direction as an opening of the fixed plate (4), and at least one auxiliary opening (7) is provided; Multiple rows of combined fixing pin holes (5) are provided on the left and right sides of the opening of the fixing plate (4), and the perimeter of the fixing plate (4) is adaptively adjusted by selecting the positions of the pin holes to adapt to the differences in the diameters of different insulator cap sockets; A plurality of radial reinforcing ribs (3) are distributed on the umbrella-shaped shielding cover (1), and a plurality of U-shaped fixing hooks (6) are symmetrically distributed below.

8. The foreign body blocking device for an insulator string of a power transmission line according to claim 7, characterized in that: The wedge-shaped engagement structure of the fixing plate (4) includes a 0.5±0.1mm flange, which forms an interference fit when closed; the fixing pin hole (5) forms an inertial lock after being inserted, and the tensile strength is ≥500N.

9. The foreign body blocking device for an insulator string of a power transmission line according to claim 7, characterized in that: The auxiliary opening (7) of the umbrella-shaped shielding cover (1) is an arc-shaped incision. When the main opening (2) is opened, the auxiliary opening (7) is elastically deformed synchronously to ensure the symmetry of the shield body when it is unfolded.

10. The foreign body blocking device for an insulator string of a power transmission line according to claim 7, characterized in that: The surface inclination angle of the umbrella-shaped shield (1) is 15°-45°, and the diameter is ≥45 cm.

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