Live-line integrated protection device for wind and distribution line

Abstract

The utility model discloses a kind of live working windproof integrated protection devices and distribution line, including insulator function module and press card type wire fixing mechanism.Insulator function module is constituted by steel foot, composite material core and umbrella cover;Press card type wire fixing mechanism includes wire slot fitting, press card fitting and operating screw;One end of wire slot fitting and press card fitting is hinged by a rotating shaft, the hinged end of wire slot fitting extends outward and forms first operating arm, the hinged end of press card fitting extends outward and forms second operating arm;One end of operating screw is rotatably connected with the end of first operating arm, the shank of operating screw passes through the threaded hole being arranged in the end of second operating arm, and limit operating ring is arranged at the end;One spring sleeve is sleeved on operating screw, and two ends are respectively abutted on the facing side of two operating arms.The device integrates insulation, windproof, lightning protection and convenient live working function, compact structure, effectively improves the operation reliability, safety and operation efficiency of distribution line.

Description

Technical Field

[0001] This utility model relates to the field of power transmission and distribution equipment technology, specifically to an insulation device for 10KV distribution network overhead lines that integrates insulation, wind protection, lightning protection and facilitates live-line work, and a distribution line containing the device. Background Technology

[0002] Currently, ordinary post-type insulators are widely used in 10kV distribution network lines. These insulators hold the conductors in top cable trays and are secured with binding wires. This traditional method has several inherent drawbacks:

[0003] 1. Poor fixation effect: The binding strength and method depend on the experience of the construction personnel, which makes it difficult to standardize and the fixation effect is inconsistent.

[0004] 2. Low reliability: Ordinary plastic-coated copper binding wire has limited tensile strength and is easily loosened under external forces such as strong winds. At the same time, the entanglement of the binding wire will generate induced current, causing heat generation and damaging the insulation layer of the wire.

[0005] 3. Difficulty in live-line work: The binding process is complicated, disassembly and assembly are extremely inconvenient in a live-line working environment, the operation time is long, the personnel risk is high, and it is difficult to restore the original state after the operation.

[0006] 4. Weak wind resistance: The binding wire is a continuous structure, and a break in one place can easily lead to the failure of the whole. The wire is also prone to loosening in windy weather.

[0007] 5. Lack of lightning protection: Ordinary insulators themselves have no lightning protection capability, requiring the installation of additional surge arresters, which increases cost, installation space, and complexity. Furthermore, the failure of traditional surge arresters cannot be visually identified, necessitating regular disassembly and inspection, resulting in heavy maintenance work.

[0008] Therefore, there is an urgent need for a new type of insulation device that can comprehensively solve the above problems. Utility Model Content

[0009] In view of the problems existing in ordinary column insulators, this utility model provides an integrated wind protection device that allows for live-line work.

[0010] To achieve the above objectives, the technical solution of this utility model is as follows:

[0011] A live-line working windproof integrated protection device includes an insulator functional module, which includes a steel foot, a composite material core, and a canopy. The composite material core is connected to the upper end of the steel foot. The device is characterized by further including a clamp-type wire fixing mechanism, which is disposed at the upper end of the composite material core and includes a wire groove hardware with a wire placement groove, a clamp hardware, and an operating screw.

[0012] The wire trough fitting is provided with a wire placement groove, and the clamping fitting is arranged opposite to the wire trough fitting to form a clamping space for accommodating the wire; one end of the wire trough fitting and the clamping fitting are hinged by a pivot, the hinged end of the wire trough fitting extends outward to form a first operating arm, and the hinged end of the clamping fitting extends outward to form a second operating arm; one end of the operating screw is rotatably connected to the end of the first operating arm by a bearing or a pin, the shaft of the operating screw passes through a threaded hole provided at the end of the second operating arm, and the end of the operating screw is provided with a limiting operating ring; a spring sleeve is fitted on the operating screw, and its two ends abut against the opposing sides of the first operating arm and the second operating arm, respectively.

[0013] Preferably, an insulating layer is provided in the groove where the wire is placed and / or on the contact surface between the clamping hardware and the wire.

[0014] Preferably, it further includes a lightning protection component, the lightning protection component comprising:

[0015] The upper electrode is electrically connected to the wire groove fitting;

[0016] The middle electrode is disposed inside the umbrella cover, and one end of it is connected to a first discharge rod. The first discharge rod extends and protrudes outside the umbrella cover, and a series discharge gap is formed between its protruding end and the opposite end of the upper electrode.

[0017] The lower electrode is disposed inside the umbrella cover, and one end of it is connected to a second discharge rod. The second discharge rod extends out of the umbrella cover and is connected to a disconnector.

[0018] A zinc oxide resistive element assembly is disposed inside the umbrella sleeve, with one end connected to the middle electrode and the other end connected to the lower electrode;

[0019] The upper electrode, series discharge gap, middle electrode, zinc oxide resistor assembly, and lower electrode together form a complete discharge channel.

[0020] Preferably, the lightning protection assembly further includes a flexible connecting wire, one end of which is connected to the movable part of the disconnector, and the other end is fixedly connected to the steel foot.

[0021] Preferably, the connection between the steel foot and the crossbeam is provided with a double nut anti-loosening structure.

[0022] Preferably, the clamping fitting and / or the groove fitting are integrally die-cast from aluminum alloy.

[0023] The second aspect of this utility model also discloses a power distribution line, including a crossarm, a conductor, and the aforementioned integrated windproof protection device for live-line operation. The steel feet of the device are fixed to the crossarm, and the conductor is clamped and fixed in the clamping wire fixing mechanism of the device.

[0024] The above-mentioned technical solution of this utility model has the following beneficial effects:

[0025] This invention significantly improves the efficiency and safety of construction and maintenance. The device employs a non-binding, clamp-type wire-fixing mechanism. A single screw drive, combined with a universal operating ring, allows for the tightening and loosening of the wires. Operation is simple and quick, eliminating cumbersome binding processes and auxiliary materials, and ensuring standardized fixing force and methods, completely eliminating quality variations caused by individual differences. This design is particularly suitable for live-line working scenarios. Workers can easily operate from a safe distance using insulated operating rods, robots, and other tools, greatly reducing the risk of electric shock, shortening work time, and alleviating labor intensity, perfectly meeting the urgent needs of modern power distribution networks for uninterrupted power supply operations.

[0026] This device significantly enhances the reliability and stability of line operation. The clamping mechanism is integrally formed from high-strength aluminum alloy, combined with an open-loop structure and a built-in insulating layer. This ensures the mechanical strength of the conductor fixation, effectively resisting external impacts such as strong winds and preventing conductor loosening. It also completely eliminates the risk of damage to the conductor insulation layer caused by induced current heating in traditional binding methods, while suppressing wear on the conductor from the hardware. Structurally, the double-nut anti-loosening structure at the lower end and the redundant design of the high-performance composite material core together constitute a reinforced windproof system from top to bottom, ensuring the overall mechanical stability of the device in harsh environments.

[0027] Furthermore, this device innovatively achieves deep integration of lightning protection functions and intelligent operation and maintenance. The device cleverly integrates the structure of a series gap surge arrester into the insulator body, eliminating the installation space, additional supports, and connecting leads required for independent surge arresters, simplifying the line structure and reducing overall costs. This surge protection module not only effectively discharges lightning current, protecting itself and downstream line equipment from lightning overvoltage damage, but its built-in disconnector automatically activates and droops to form a visual marker when the surge protection function fails. This design enables remote and intuitive judgment of the surge arrester's status, allowing patrol personnel to quickly identify fault points without climbing poles. It revolutionizes the outdated operation and maintenance mode that previously required periodic disassembly and inspection of surge arresters, greatly improving operation and maintenance efficiency and economy.

[0028] This utility model organically integrates four major functions—insulation, wind protection, lightning protection, and convenient live-line operation—to create a comprehensive platform that is compact, fully functional, safe, reliable, and highly efficient in operation and maintenance. It significantly improves the technical level and operational efficiency of overhead power distribution lines and has extremely high practical value and promising prospects for promotion. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the integrated windproof protection device for live-line work according to this utility model;

[0030] Figure 2 This is a partial enlarged view of the integrated windproof protection device for live-line operation according to this utility model. Detailed Implementation

[0031] The implementation methods of the present invention's integrated windproof protection device for live-line work will be described in detail below with reference to the accompanying drawings and embodiments.

[0032] Please see Figure 1-2 As shown, this utility model discloses an integrated wind protection device for live-line work, which includes an insulator functional module and a clamp-type wire fixing mechanism.

[0033] The insulator functional module is the basic structural part of the device, mainly consisting of a steel foot 1, a composite material core 3, and a sheath 11. The steel foot 1 is located at the bottom of the device and is fixed to the crossarm by bolts. A double-nut anti-loosening structure is installed at the connection point to effectively prevent loosening caused by wind or vibration, improving overall mechanical stability. The composite material core 3 is connected to the upper end of the steel foot 1. As the main load-bearing component, it possesses high mechanical strength and excellent insulation performance, capable of withstanding the weight of the conductor, wind load, and bending moment. The sheath 11 covers the core, providing necessary creepage distance and external insulation protection, ensuring safe operation of the line even in harsh environments.

[0034] A clamp-type wire fixing mechanism is located at the upper end of the composite core 3, replacing the traditional wire binding method and is a key component for convenient live-line work. This mechanism mainly includes a wire trough fitting 5, a clamp fitting 6, and an operating screw 15 (which works with a universal operating ring 4). The wire trough fitting 5 has an arc-shaped wire placement groove for supporting the wire; the clamp fitting 6 is hinged to one end of the wire trough fitting 5 via a pivot, and the two are arranged opposite each other to form an openable clamping space. The hinged ends of the wire trough fitting 5 and the clamp fitting 6 extend outwards to form a first operating arm 50 and a second operating arm 60, respectively. One end of the operating screw 15 is rotatably connected to the first operating arm 50 via a bearing or pin, and the screw body passes through a threaded hole at the end of the second operating arm 60, with a limiting operating ring 4 at the end. A spring sleeve 16 is provided on the operating screw 15, with its two ends abutting against the opposing sides of the two operating arms, providing a pre-tightening force to make the clamp fitting 6 tend to open.

[0035] An insulating layer 7 is provided on the surface of the wire placement groove of the online slot fitting 5 and the contact surface of the clamping fitting 6 with the wire. This layer can be made of engineering plastic or rubber material, which not only avoids electrolytic corrosion or wear caused by direct contact between the metal fitting and the wire, but also serves as part of the lightning protection current discharge triggering structure.

[0036] During operation, workers use an insulated operating rod or robotic tool to hook the universal operating ring 4 and rotate the operating screw. This drives the first and second operating arms to move closer or further apart, thereby causing the clamping hardware 6 to press or release the wire. This design allows for rapid operation by a single person from a safe distance, greatly improving the efficiency and safety of live-line work.

[0037] In another example, based on the above scheme, the device also includes a lightning protection component, which is integrated inside the insulator body to form a reliable lightning discharge channel. The lightning protection component mainly consists of an upper electrode 8, a middle electrode 9, a zinc oxide resistor assembly 10, a lower electrode 2, a disconnector 13, and a flexible connecting wire 14.

[0038] The upper electrode 8 is electrically connected to the wire groove fitting 5. The middle electrode 9 is disposed inside the umbrella sleeve 11, with one end connected to a first discharge rod. The first discharge rod extends and protrudes outside the umbrella sleeve 11, forming a series discharge gap between its protruding end and the opposite end of the upper electrode. The lower electrode 2 is disposed inside the umbrella sleeve 11, with one end connected to a second discharge rod. The second discharge rod extends and protrudes outside the umbrella sleeve 11 and is connected to a disconnector 13. The zinc oxide resistor assembly 10 is disposed inside the umbrella sleeve 11, with one end connected to the middle electrode 9 and the other end connected to the lower electrode 2. One end of the flexible connecting wire 14 is connected to the movable part of the disconnector 13, and the other end is fixedly connected to the steel foot 1. The upper electrode 8, the series discharge gap, the middle electrode 9, the zinc oxide resistor assembly 10, the lower electrode 2, and the flexible connecting wire 14 together constitute a complete discharge channel.

[0039] When lightning strikes, the components described above form a discharge channel from top to bottom. The cable tray hardware contacts the conductor. When a lightning overvoltage occurs in the line, it instantly breaks the conductor insulation layer and the insulating isolation layer at that point, connecting the lightning voltage to the cable tray hardware. Simultaneously, the lightning current is guided to the upper electrode, and then through the discharge gap connected in series in the discharge path. The lightning current flows from the middle electrode through the zinc oxide resistor assembly, the lower electrode, the disconnector, and the flexible connecting wire, finally flowing to the crossarm at the steel foot position. Through the crossarm and the pole, the lightning current is ultimately conducted to the ground. It should be noted that the cement pole is a resistive body, not an insulator. There is no resistance requirement for the grounding resistance of the series gap surge arrester.

[0040] The key components of lightning protection are the discharge gap and the zinc oxide resistor assembly. When there is no lightning overvoltage, the discharge gap prevents the introduction of normal line voltage, ensuring no voltage difference across the zinc oxide resistor assembly and extending its lifespan. The zinc oxide resistor exhibits non-linear resistance characteristics. Under normal conditions, the resistor is high-resistivity, and the discharge channel is closed. When a lightning voltage is applied and reaches the resistor's operating value, the resistor experiences a cliff-like decrease in resistance, the discharge channel opens instantaneously, and after the lightning current dissipates, the resistor returns to its high-resistivity state, and the discharge channel closes, restoring normal operation.

[0041] When the zinc oxide resistor assembly is completely broken down and cannot recover to a high resistance value, the surge protection function fails. The disconnector in the discharge channel will then activate, cutting off the discharge channel and falling naturally. It will be suspended in the air by the flexible connecting wire, forming a clear marker. Patrol personnel can then determine the failure of the surge protection function by observation, eliminating the need for the cumbersome method of periodic disassembly and testing. This facilitates the later diagnosis of product faults.

[0042] The windproof function is mainly used to eliminate the problem of strong winds blowing the line conductors, increasing the force transmitted from the conductors to the insulators, and causing problems such as conductor loosening, insulator breakage, or loosening and detachment between the insulator and the crossarm. This utility model achieves its windproof function through a three-layer structure: the upper clamping mechanism is robust and reliable, preventing conductor loosening; the middle composite material core 3 adopts a high-strength redundant design, possessing a high bending failure load to resist the swaying load brought by strong winds; and the bottom steel foot 1 is firmly connected to the crossarm through a double-nut anti-loosening structure. The three components combine to form an integrated windproof reinforcement system from top to bottom.

[0043] The device described in this utility model can be widely used in 10kV power distribution lines. Its steel foot 1 is fixed on the crossarm, as shown in the reference. Figure 2 The conductor 18 is clamped in the clamp-type wire fixing mechanism, which has the characteristics of convenient installation, reliable operation and efficient maintenance, and meets the development needs of smart distribution networks.

[0044] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A live-line working windproof integrated protection device, comprising an insulator functional module, wherein the insulator functional module includes a steel foot, a composite material core, and a shed, the composite material core being connected to the upper end of the steel foot; characterized in that, It also includes a clamping wire fixing mechanism, which is disposed at the upper end of the composite material core and includes a wire groove fitting with a wire placement groove, a clamping fitting, and an operating screw; The wire trough fitting is provided with a wire placement groove, and the clamping fitting is arranged opposite to the wire trough fitting to form a clamping space for accommodating the wire; one end of the wire trough fitting and the clamping fitting are hinged by a pivot, the hinged end of the wire trough fitting extends outward to form a first operating arm, and the hinged end of the clamping fitting extends outward to form a second operating arm; one end of the operating screw is rotatably connected to the end of the first operating arm by a bearing or a pin, the shaft of the operating screw passes through a threaded hole provided at the end of the second operating arm, and the end of the operating screw is provided with a limiting operating ring; a spring sleeve is fitted on the operating screw, and its two ends abut against the opposing sides of the first operating arm and the second operating arm, respectively.

2. The integrated windproof protection device for live-line work as described in claim 1, characterized in that, The wires of the wire groove fitting are placed in the groove and / or an insulating layer is provided on the contact surface between the clamping fitting and the wires.

3. The integrated windproof protection device for live-line work as described in claim 1, characterized in that, It also includes a lightning protection component, which includes: The upper electrode is electrically connected to the wire groove fitting; The middle electrode is disposed inside the umbrella cover, and one end of it is connected to a first discharge rod. The first discharge rod extends and protrudes outside the umbrella cover, and a series discharge gap is formed between its protruding end and the opposite end of the upper electrode. The lower electrode is disposed inside the umbrella cover, and one end of it is connected to a second discharge rod. The second discharge rod extends out of the umbrella cover and is connected to a disconnector. A zinc oxide resistive element assembly is disposed inside the umbrella sleeve, with one end connected to the middle electrode and the other end connected to the lower electrode; The upper electrode, series discharge gap, middle electrode, zinc oxide resistor assembly, and lower electrode together form a complete discharge channel.

4. The integrated windproof protection device for live-line work as described in claim 3, characterized in that, The lightning protection assembly also includes a flexible connecting wire, one end of which is connected to the movable part of the disconnector, and the other end is fixedly connected to the steel foot.

5. The integrated windproof protection device for live-line work as described in claim 1, characterized in that, The connection between the steel foot and the crossarm is equipped with a double nut anti-loosening structure.

6. The integrated windproof protection device for live-line work as described in claim 1, characterized in that, The clamping fittings and / or the groove fittings are integrally die-cast from aluminum alloy.

7. A power distribution line, characterized in that, It includes a crossarm, a conductor, and an integrated windproof protection device for live-line work as described in any one of claims 1-6, wherein the steel feet of the device are fixed to the crossarm, and the conductor is clamped and fixed in the clamp-type wire fixing mechanism of the device.

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