A high-voltage wire protection isolation cover for a transformer substation

Abstract

The utility model discloses a high -tension wire protection isolation cover for transformer substation belongs to high -voltage insulation protection technical field, and the device includes the rubber sleeve of the sleeve seam of the bottom of the opening of the silicone rubber material, and the sleeve seam both sides of rubber sleeve are equipped with the integrated opening and closing rubber edge, and the outside sliding sleeve of rubber sleeve is equipped with the fastening assembly made of carbon fiber material, and the fastening assembly includes two fastening rings through the ring hinge articulates, and the fastening ring bottom is connected the opening and closing board, and the bolt cooperates with the nut, passes through the opening and closing board and opening and closing rubber edge, thereby will sleeve seam strong clamping and close. The utility model adopts the inside and outside double -deck opening and closing design, need not to disconnect the wire when installing, has realized safe and convenient uninterrupted power operation, and the sleeve seam of inside flexible rubber sleeve is applied to the long -lasting mechanical pressure through the outside rigid fastening assembly, has guaranteed the long -term sealing property and waterproofness of junction, and combines the weather resistance of material, has greatly promoted the protection reliability and service life of device.

Description

Technical Field

[0001] This utility model relates to the field of high voltage insulation protection technology, and in particular to a protective isolation cover for high voltage conductors in substations. Background Technology

[0002] In the daily operation of substations, a large number of switchgear and transformers are electrically connected by overhead bare conductors. These exposed high-voltage conductors are exposed to the outdoor environment for a long time, directly facing a variety of safety hazards. On the one hand, these bare conductors are susceptible to being climbed and touched by birds, snakes, cats and other small animals, which can cause phase-to-phase and phase-to-ground short circuit faults, resulting in large-scale power outages and seriously affecting the stability and safe operation of the power grid. On the other hand, bare conductors are subjected to wind, sun and rain, snow erosion and industrial dust pollution for a long time, which can cause corrosion and dirt accumulation on the surface of the conductors. In humid weather, this can lead to a decrease in insulation performance and even flashover, threatening equipment safety.

[0003] To address the aforementioned issues, existing technologies employ the method of installing insulating protective sleeves on high-voltage conductors. However, these protective sleeves still present numerous inconveniences in practical applications. Many of these sleeves are integral tubular structures, requiring insertion from one end of the conductor during installation. This necessitates removing the conductor from the equipment terminals, which not only requires prolonged power outages but also involves extremely complex, time-consuming, and labor-intensive operations, significantly increasing maintenance costs and difficulties.

[0004] To simplify the installation process, some openable protective covers have emerged. These covers use snap-on and latch structures to close onto the conductors. While this avoids the hassle of disassembling the conductors, new problems arise. These simple snap-on structures cannot provide uniform and durable closing pressure, and the sealing performance at the joints of the snap-on structures is poor. In long-term outdoor environments, due to material aging, thermal expansion and contraction, and wind vibration, gaps will form at the joints, allowing rainwater and moisture to infiltrate, thus negating the purpose of insulation protection. In addition, some protective covers use materials with poor weather resistance, which will become brittle and crack under repeated exposure to ultraviolet radiation and high and low temperatures, resulting in a decrease in mechanical strength and protective capabilities, failing to meet the requirements for long-term reliable use.

[0005] Therefore, this utility model proposes a protective isolation cover for high-voltage conductors in substations to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems of complex installation process, power outage operation, unreliable sealing of joints and reduced overall protective performance of existing high-voltage conductor protective covers for substations when used outdoors for a long time, this utility model aims to provide a high-voltage conductor protective cover for substations with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a protective isolation cover for high-voltage conductors in substations, comprising: a rubber sleeve for being fitted onto the high-voltage line, and two fastening rings, annular hinges, a hinge plate, bolts, washers, and nuts fitted onto the outside of the rubber sleeve.

[0008] The bottom of the rubber sleeve has a slit along its length, and two opening and closing rubber edges are integrally formed on both sides of the slit, with an installation hole on each opening and closing rubber edge.

[0009] Furthermore, the tops of the two fastening rings are hinged by a ring hinge, and the bottoms of the two fastening rings are respectively fixedly connected to opening and closing plates. The opening and closing plates have two mounting holes corresponding to the position of mounting hole one. After the bolt passes through the washer, it passes through the aligned mounting holes one and two and is threaded to the nut. In this way, the two opening and closing plates are clamped to close the gap of the rubber sleeve.

[0010] Preferably, one end of the rubber sleeve is fixedly connected to a limiting block, and the other end of the rubber sleeve is fixedly connected to a sleeve. The sleeve has a limiting groove inside for accommodating and fixing the limiting block, so as to realize the continuous splicing of multiple protective covers.

[0011] Preferably, the rubber sleeve, limiting block, sleeve, and opening / closing rubber edge are made of silicone rubber.

[0012] Preferably, the inner wall of the rubber sleeve is coated with a semiconductor shielding layer to uniformize the electric field and prevent partial discharge.

[0013] Preferably, the fastening ring, the annular hinge, and the opening and closing plate are made of carbon fiber.

[0014] Preferably, the outer walls of the fastening ring, annular hinge, and opening / closing plate are coated with a protective layer that is UV resistant and water-repellent to enhance the outdoor weather resistance of the device.

[0015] Preferably, the gaskets are respectively disposed between the head of the bolt and the opening / closing plate, and between the nut and the opening / closing plate, to distribute the locking stress.

[0016] Preferably, the fastening ring and the outer wall of the rubber sleeve are in a sliding fit, which facilitates position adjustment during installation to align with the hole.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting a rubber sleeve with a slit at the bottom and cooperating with an external openable fastening ring connected by a ring hinge, and finally using bolt pressure to lock the slit in a double-layer openable structure, solves the problems of power outage operation, complicated procedures, and time and labor consumption in the installation of protective devices in the prior art. It achieves the technical effect of quickly and conveniently completing the installation without disconnecting the wires, and significantly improving construction efficiency and safety.

[0018] 2. This utility model, by combining an inner flexible silicone rubber insulator with an outer rigid carbon fiber fastener, and by using the locking force of bolts to forcefully press the rigid opening and closing plate against the flexible opening and closing rubber edge, solves the problems of unreliable sealing at the joints of existing protective devices and failure due to material aging when exposed to the outdoors for a long time. It achieves the technical effects of excellent sealing performance, high mechanical protection strength and strong weather resistance, long-term stable operation, and extended service life. Attached Figure Description

[0019] Figure 1 This is a perspective view of a high-voltage conductor protective isolation cover for substations proposed in this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a front view of a high-voltage conductor protective isolation cover for substations proposed in this utility model; Figure 4 This is a cross-sectional view of a rubber sleeve in a high-voltage conductor protective isolation cover for substations, as proposed in this utility model. Figure 5 This is an exploded view of the fastening structure in a high-voltage conductor protective isolation cover for substations proposed in this utility model.

[0020] Legend: 1. High-voltage line; 2. Rubber sleeve; 3. Limiting block; 4. Sleeve; 5. Limiting groove; 6. Opening and closing rubber edge; 7. Sleeve gap; 8. Mounting hole one; 9. Fastening ring; 10. Ring hinge; 11. Opening and closing plate; 12. Mounting hole two; 13. Bolt; 14. Washer; 15. Nut. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0023] Example: Please refer to Figures 1 to 5 This utility model provides a protective isolation cover for high-voltage conductors in substations, which aims to solve the problems of complex installation procedures and insufficient sealing and weather resistance in existing protective devices for long-term outdoor use. Figure 1 and Figure 3 As shown, a high-voltage conductor protective isolation cover for substations adopts a double-layer structure, including a rubber sleeve 2 as the main insulating body and a fastening assembly for externally securing the rubber sleeve 2. The rubber sleeve 2 is used to directly wrap the high-voltage line 1, insulating and sealing it. The fastening assembly applies external locking force to the rubber sleeve 2 to ensure structural stability and reliable sealing. The rubber sleeve 2 is a hollow tubular structure that slides onto the outer wall of the high-voltage line 1 during use. A continuous sleeve slot 7 is provided along the length of the bottom of the rubber sleeve 2 for easy installation. Openable rubber edges 6 are integrally formed on the inner and outer edges of the sleeve slot 7. Two parallel mounting holes 8 are provided on the two openable rubber edges 6. The fastening assembly includes two semi-circular fasteners. Two fastening rings 9 are slidably fitted on the outer wall of the rubber sleeve 2. The tops of the two fastening rings 9 are rotatably connected by two annular hinges 10, which can be opened and closed. The bottoms of the two fastening rings 9 are respectively fixedly connected to outwardly extending opening and closing plates 11. The two opening and closing plates 11 are provided with mounting holes 2 12. The position and size of the mounting holes 2 12 correspond one-to-one with the mounting holes 1 8. The bolt 13, washer 14 and nut 15 are used to achieve final locking. After the shank of the bolt 13 passes through the washer 14 located at the head of the bolt 13, it can pass through the mounting holes 2 12 on the two opposite opening and closing plates 11 and the mounting holes 1 8 on the two opening and closing rubber edges 6 in sequence, and finally achieve threaded connection with the nut 15.

[0024] To solve the aforementioned technical problems, the core of the technical solution in this embodiment lies in a high-voltage conductor protective isolation cover for substations, which achieves a balance between ease of installation and reliable protection through the opening, closing, and fastening of its inner and outer two-layer structure. Please refer to the following for details. Figure 2 , Figure 4 and Figure 5The core structure is described in detail below. The rubber sleeve 2, as the main insulating material, is made of silicone rubber, ensuring excellent electrical insulation performance and elasticity. The inner wall of the rubber sleeve 2 is also coated with a semiconductor shielding layer. The function of the semiconductor shielding layer is to uniformly distribute the electric field around the high-voltage line 1, preventing concentrated electric field and partial discharge, thereby improving the overall insulation reliability. The sleeve gap 7 and the opening / closing rubber edge 6 at the bottom of the rubber sleeve 2 are key to achieving uninterrupted power-off installation. By prying open the two opening / closing rubber edges 6, the sleeve gap 7 can open to a sufficiently large opening, allowing the entire rubber sleeve 2 to be directly snapped onto the high-voltage line 1 from below without disassembling the conductor. The external fastening ring 9, the annular hinge 10, and the opening / closing plate 11 are all made of carbon fiber, which has... The advantages of high strength and lightweight design allow for strong fastening without placing excessive additional load on the high-voltage line 1. The outer wall of the carbon fiber assembly is also specially coated with a protective layer that resists ultraviolet rays and water repellency to withstand harsh outdoor environments such as sun and rain, effectively extending the service life of the device. In the assembled state, the two fastening rings 9 are connected by the top annular hinge 10 to form an openable ring structure. After being fitted onto the outside of the rubber sleeve 2, the two bottom opening plates 11 approach each other. At this time, the locking action of the bolt 13 and nut 15 will apply strong pressure to the opening and closing rubber edge 6 through the opening and closing plates 11. This mechanical pressing structure ensures that the sleeve seam 7 is completely and tightly sealed, achieving a reliable waterproof sealing effect.

[0025] Based on the above embodiments, this utility model may further include the following preferred technical solutions. As a preferred implementation method, in order to achieve continuous and seamless splicing of multiple protective isolation covers, it can cover high-voltage conductors of any length. Please refer to... Figure 1 and Figure 3 One end of the rubber sleeve 2 is fixedly connected to a protruding limiting block 3, and the other end of the rubber sleeve 2 is fixedly connected to a hollow sleeve 4. The sleeve 4 has a limiting groove 5 inside that perfectly matches the shape and size of the limiting block 3. When splicing installation is required, the sleeve 4 of one protective isolation cover can be directly fitted onto the limiting block 3 of the adjacent protective isolation cover. Through the tight fit between the limiting groove 5 and the limiting block 3, precise positioning and firm connection of the two protective isolation covers in the axial and radial directions can be achieved, preventing misalignment and separation at the splicing point, and ensuring the continuity and integrity of the overall protection. The limiting block 3 and the sleeve 4 are also made of the same silicone rubber material as the rubber sleeve 2 and are integrally molded, ensuring that the splicing part also has excellent insulation and sealing performance. As another preferred embodiment, to further enhance the reliability of the fastening and distribute stress, please refer to... Figure 5Washers 14 are provided between the head of bolt 13 and the hinge plate 11, and between nut 15 and hinge plate 11. Washers 14 increase the contact area between the head of bolt 13 and nut 15 and hinge plate 11, which can effectively prevent local stress concentration and damage to the carbon fiber hinge plate 11 caused by the head of bolt 13 and nut 15 during high-strength tightening, thus improving the stability and durability of the connection. As another preferred embodiment, in order to facilitate the alignment of the holes during installation, the fastening ring 9 and the outer wall of the rubber sleeve 2 are in a sliding fit. Before tightening bolt 13, the installer can easily make a slight adjustment to the position of the fastening component in the axial direction of the rubber sleeve 2 so that the mounting hole 12 on the hinge plate 11 is precisely aligned with the mounting hole 8 on the hinge rubber edge 6, and then the tightening operation is performed, which greatly reduces the installation difficulty and improves the construction efficiency.

[0026] Working principle: During installation, the operator first uses their hands to pry open the two opening and closing rubber edges 6 at the bottom of the rubber sleeve 2, so that the sleeve seam 7 opens and forms a sufficiently large opening. Then, the opened rubber sleeve 2 is lifted from below the high-voltage line 1, so that the high-voltage line 1 is completely accommodated in the inner cavity of the rubber sleeve 2. Then, the opening and closing rubber edges 6 are loosened, and the elasticity of the silicone rubber material itself is used to make the sleeve seam 7 initially close, thus pre-fixing the rubber sleeve 2 to the high-voltage line 1. If the conductor to be protected is long, this step is repeated, and the sleeve 4 of the next unit is fitted onto the limiting block 3 of the previous unit. Through the cooperation of the limiting groove 5 in the sleeve 4 and the limiting block 3, the seamless splicing of multiple units is completed. Next, install the external fastening assembly. Open the two fastening rings 9 connected by the ring hinge 10 and fit them in a C-shape over the already installed rubber sleeve 2. Then close the fastening rings 9 and bring the two bottom opening and closing plates 11 closer to each other. Since the fastening rings 9 and the outer wall of the rubber sleeve 2 are in sliding fit, the entire fastening assembly can be moved slightly along the axis of the high voltage line 1 until the mounting hole 12 on the opening and closing plate 11 is completely aligned with the mounting hole 8 on the opening and closing rubber edge 6. After the hole is aligned, place the washer 14 on the bolt 13, and then pass the bolt 13 through the mounting hole 12 of the front opening plate 11, the mounting hole 8 of the front opening rubber edge 6, across the gap of the sleeve 7, and then through the mounting hole 8 of the rear opening rubber edge 6 and the mounting hole 12 of the rear opening plate 11. Finally, put another washer 14 on the end of the bolt 13 and tighten it with the nut 15. As the nut 15 is tightened, the two opening and closing plates 11 move closer together under the enormous pressure of the bolt 13 and the nut 15. This powerful clamping force is evenly transmitted to the two opening and closing rubber edges 6, which forcefully presses and completely seals the bottom seam 7 of the rubber sleeve 2, thereby achieving reliable insulation and waterproof sealing of the internal high-voltage line 1. At the same time, the fastening ring 9 also firmly holds the rubber sleeve 2, providing robust mechanical support and external protection through the synergistic effect of the inner and outer double-layer structure.

Claims

1. A protective isolation cover for high-voltage conductors in a substation, comprising a rubber sleeve (2) for mounting on a high-voltage conductor (1); Its features are, The bottom of the rubber sleeve (2) has a sleeve slit (7) along its length. Two opening and closing rubber edges (6) are integrally formed on both sides of the sleeve slit (7). The opening and closing rubber edges (6) have a first mounting hole (8). The protective isolation cover also includes two fastening rings (9). The two fastening rings (9) are sleeved on the outer wall of the rubber sleeve (2). The tops of the two fastening rings (9) are hinged by a ring hinge (10). The bottoms of the two fastening rings (9) are respectively fixedly connected to opening and closing plates (11). The opening and closing plates (11) have a second mounting hole (12) corresponding to the position of the first mounting hole (8). After the bolt (13) passes through the washer (14), it passes through the aligned second mounting hole (12) and the first mounting hole (8) and is threadedly connected to the nut (15) to clamp the two opening and closing plates (11) and close the sleeve slit (7).

2. The protective isolation cover for high-voltage conductors in a substation according to claim 1, characterized in that, One end of the rubber sleeve (2) is fixedly connected to a limiting block (3), and the other end of the rubber sleeve (2) is fixedly connected to a sleeve (4). The sleeve (4) has a limiting groove (5) inside for accommodating and fixing another limiting block (3).

3. A protective isolation cover for high-voltage conductors in a substation according to claim 2, characterized in that, The rubber sleeve (2), the limiting block (3), the sleeve (4), and the opening and closing rubber edge (6) are all made of silicone rubber.

4. A protective isolation cover for high-voltage conductors in a substation according to claim 3, characterized in that, The inner wall of the rubber sleeve (2) is coated with a semiconductor shielding layer.

5. A protective isolation cover for high-voltage conductors in a substation according to claim 1, characterized in that, The fastening ring (9), the annular hinge (10), and the opening and closing plate (11) are all made of carbon fiber.

6. A protective isolation cover for high-voltage conductors in a substation according to claim 5, characterized in that, The outer walls of the fastening ring (9), the annular hinge (10), and the opening and closing plate (11) are all coated with a protective layer that is UV resistant and water-repellent.

7. A protective isolation cover for high-voltage conductors in a substation according to claim 1, characterized in that, The gasket (14) is disposed between the head of the bolt (13) and the hinge plate (11), and between the nut (15) and the hinge plate (11).

8. A protective isolation cover for high-voltage conductors in a substation according to claim 1, characterized in that, The fastening ring (9) slides with the outer wall of the rubber sleeve (2) to facilitate alignment of the mounting hole one (8) and the mounting hole two (12) during installation.

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