High-voltage cross arm composite insulator

Abstract

The utility model discloses a high-voltage cross arm composite insulator, which belongs to the technical field of power equipment, and comprises a core rod, the outer surface of the core rod is in contact with a plurality of fixing sleeves, the outer surfaces of the plurality of fixing sleeves are connected with umbrella skirts, the inner wall of a fixing groove is detachably connected with a hoop, and the inner wall of the fixing groove is provided with a plurality of umbrella skirts. The inner wall of the pressing sleeve makes contact with the outer surface of the fixing sleeve, the fixing sleeve, the umbrella skirts and the pressing sleeve are matched, the umbrella skirts are divided into independent bodies from an original whole through the fixing sleeve, after the umbrella skirts are damaged, the damaged umbrella skirts are disassembled and installed again, and after the umbrella skirts are installed, the umbrella skirts are fixed through the pressing sleeve. The fixing sleeves on the lower portion are sequentially wrapped through the pressing sleeves, after the umbrella skirts on the high-voltage cross arm composite insulator are damaged, the whole high-voltage cross arm composite insulator does not need to be replaced, only a single umbrella skirt needs to be replaced, the maintenance cost is reduced, and the utilization rate of the high-voltage cross arm composite insulator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, and particularly relates to a high-voltage cross-arm composite insulator. Background Technique

[0002] High-voltage cross-arm composite insulators are key components used in high-voltage transmission lines. They not only play an insulating role but also need to withstand mechanical tension and the influence of environmental factors. Compared with traditional porcelain cross-arm insulators, composite insulators have the characteristics of light weight, small volume, corrosion resistance, and excellent aging resistance. These characteristics make composite insulators particularly suitable for the renovation of transmission lines in narrow urban spaces, which can effectively reduce the height of the tower poles, save construction and maintenance costs, and ensure the safe and stable operation of the power system.

[0003] Although the existing high-voltage cross-arm composite insulators have many advantages, the umbrella skirts of the high-voltage cross-arm composite insulators are integrally formed with silicone rubber material. The silicone rubber material is relatively soft and is easily damaged when it comes into contact with hard objects and drops or rubs during construction or operation, which easily destroys the sealing performance of the high-voltage cross-arm composite insulator and affects its insulation performance. At the same time, it may be affected by environmental factors such as ultraviolet radiation, corona discharge, humidity, and salt spray during long-term use, which easily leads to the aging of the umbrella skirts, causing the umbrella skirts to gradually lose their protection of the core rod. Since most of the existing umbrella skirts are integrally formed, the umbrella skirts cannot be replaced individually, and only the entire high-voltage cross-arm composite insulator can be replaced, increasing the maintenance cost. To solve this technical problem, the utility model proposes a high-voltage cross-arm composite insulator. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a high-voltage cross-arm composite insulator, which can effectively solve the problems mentioned in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A high-voltage cross-arm composite insulator includes a core rod. A clamping wire groove is opened at the top end of the core rod, a steel foot is arranged at the bottom end of the core rod, the outer surface of the core rod is in contact with a plurality of fixing sleeves, umbrella skirts are connected to the outer surfaces of the plurality of fixing sleeves, fixing grooves are opened on the inner sides of the plurality of fixing sleeves, a hoop is detachably connected to the inner wall of the fixing groove, a pressing sleeve is connected to the lower surface of the umbrella skirt, and the inner wall of the pressing sleeve is in contact with the outer surface of the fixing sleeve.

[0007] Preferably, a plurality of positioning grooves are opened inside the core rod, positioning rings are connected to the inner walls of the plurality of fixing sleeves, and the outer surface of the positioning ring is in contact with the inner wall of the positioning groove.

[0008] Preferably, the plurality of fixing sleeves, umbrella skirts, pressing sleeves and positioning rings are arranged at equal intervals, and the diameters of the plurality of umbrella skirts are different. The plurality of fixing sleeves, umbrella skirts, pressing sleeves and positioning rings are all made of silicone rubber material.

[0009] Preferably, a groove is formed at the top end of the mandrel, and one of the fixing sleeves is located inside the groove.

[0010] Preferably, a pressing plate is in contact with the top end of the mandrel, and the pressing plate is located above the wire clamping groove. A locking bolt is rotatably connected to the inner side of the pressing plate, and the threaded section of the locking bolt is threadedly connected to the inner side of the mandrel.

[0011] Preferably, a connecting block is connected to the bottom end of the mandrel, and the outer surface of the connecting block is in contact with the inner wall of the steel foot.

[0012] Preferably, a first through groove is formed in the inner side of the connecting block, a second through groove is formed in the inner side of the steel foot, fixing blocks are in contact with the inner walls of the first through groove and the second through groove, and there are two fixing blocks. A fixing bolt is rotatably connected to the inner side of one of the fixing blocks, and the threaded section of the fixing bolt is threadedly connected to the inner side of the other fixing block.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the utility model, through the cooperation between the fixing sleeve, the umbrella skirt and the pressing sleeve, the umbrella skirt is divided from the original whole into separate individuals by the fixing sleeve. After the umbrella skirt is damaged, the damaged one is disassembled and a new one is installed. After the umbrella skirt is installed, the pressing sleeve wraps the lower fixing sleeves in turn, so that there is no gap between the fixing sleeves, and the plurality of fixing sleeves form a whole. The pressing sleeve can prevent rainwater from seeping in through the gap between the fixing sleeves. When the umbrella skirt on the high-voltage cross-arm composite insulator is damaged, it is not necessary to replace the whole high-voltage cross-arm composite insulator, and only a single umbrella skirt needs to be replaced, reducing the maintenance cost and improving the utilization rate of the high-voltage cross-arm composite insulator.

[0015] In the utility model, through the cooperation between the positioning groove and the positioning ring, the positioning ring is blocked by the positioning groove, so that the fixing sleeve can be quickly positioned during installation, and at the same time, the fixing sleeve is prevented from moving when it is not fixed by a hoop, which is convenient for the installer to install the positioning sleeve to the set position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the high-voltage cross-arm composite insulator of the utility model;

[0017] Figure 2 It is a schematic diagram of the main structure of the high-voltage cross-arm composite insulator of the utility model;

[0018] Figure 3 Schematic diagram of the groove structure in the high-voltage cross-arm composite insulator of the present utility model;

[0019] Figure 4 Schematic diagram of the overall three-dimensional structure of the steel foot in the high-voltage cross-arm composite insulator of the present utility model;

[0020] Figure 5 Schematic diagram of the overall three-dimensional structure of the fixing block in the high-voltage cross-arm composite insulator of the present utility model.

[0021] In the figure: 1, core rod; 2, clip wire groove; 3, steel foot; 4, fixing sleeve; 5, umbrella skirt; 6, fixing groove; 7, hoop; 8, pressure sleeve; 9, positioning ring; 10, groove; 11, pressing plate; 12, connecting block; 13, first through groove; 14, second through groove; 15, locking bolt; 16, fixing bolt; 17, fixing block; 18, positioning groove. Specific embodiments

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] As Figures 1-5 shown, the high-voltage cross-arm composite insulator includes a core rod 1. A clip wire groove 2 is provided at the top end of the core rod 1, and a steel foot 3 is provided at the bottom end of the core rod 1. The core rod 1 provides mechanical support and ensures electrical insulation, and the core rod 1 is connected to externally connected components through the clip wire groove 2 and the steel foot 3.

[0024] A plurality of fixing sleeves 4 are in contact with the outer surface of the core rod 1. Umbrella skirts 5 are connected to the outer surfaces of the plurality of fixing sleeves 4. The fixing sleeves 4 provide support for the umbrella skirts 5. Fixing grooves 6 are provided inside the plurality of fixing sleeves 4. The fixing grooves 6 provide space for installing the hoop 7 to prevent the hoop 7 from sliding when not tightened. The hoop 7 is detachably connected to the inner wall of the fixing groove 6. The fixing sleeve 4 and the core rod 1 are more tightly connected through the hoop 7. A pressure sleeve 8 is connected to the lower surface of the umbrella skirt 5. The inner wall of the pressure sleeve 8 is in contact with the outer surface of the fixing sleeve 4. The lower fixing sleeve 4 is wrapped and covered through the pressure sleeve 8 to prevent rainwater or dust from entering through the gap between the fixing sleeve 4 and the umbrella skirt 5 and corroding the core rod 1.

[0025] A plurality of positioning grooves 18 are provided inside the core rod 1. Positioning rings 9 are connected to the inner walls of the plurality of fixing sleeves 4. The outer surface of the positioning ring 9 is in contact with the inner wall of the positioning groove 18. The positioning groove 18 forms a block for the positioning ring 9 to prevent the fixing sleeve 4 from moving when not fixed by the hoop 7, and at the same time, it is convenient for the installer to install the fixing sleeve 4 to the set position.

[0026] Multiple fixing sleeves 4, umbrella skirts 5, pressing sleeves 8 and positioning rings 9 are arranged at equal distances, and the diameters of the multiple umbrella skirts 5 are not equal. The multiple fixing sleeves 4, umbrella skirts 5, pressing sleeves 8 and positioning rings 9 are all made of silicone rubber. Silicone rubber has good advantages such as high and low temperature resistance, weather resistance, electrical insulation and physiological inertness. Its service temperature can maintain performance within the temperature range of -55°C to 350°C, which is particularly suitable for the working environment of making high-voltage cross-arm composite insulators. The fixing sleeves 4, umbrella skirts 5, fixing grooves 6, pressing sleeves 8 and positioning rings 9 are integrally formed.

[0027] A groove 10 is opened at the top end of the core rod 1, and one of the fixing sleeves 4 is located inside the groove 10. The groove 10 is located at the top end of the core rod 1. The groove 10 can wrap the uppermost fixing sleeve 4 inside to prevent rainwater from seeping in through the gap between the fixing sleeves 4.

[0028] A pressing plate 11 is in contact with the top end of the core rod 1, and the pressing plate 11 is located above the wire clamping groove 2. A locking bolt 15 is rotatably connected to the inner side of the pressing plate 11. The threaded section of the locking bolt 15 is threadedly connected to the inner side of the core rod 1. The pressing plate 11 forms a wrap around the wire placed inside the wire clamping groove 2. By rotating and tightening the locking bolt 15, the pressing plate 11 has stability, improving the fixation of the pressing plate 11 on the wire.

[0029] A connecting block 12 is connected to the bottom end of the core rod 1. The outer surface of the connecting block 12 is in contact with the inner wall of the steel foot 3. The core rod 1 forms a connection point through the connecting block 12. The steel foot 3 wraps the connecting block 12 inside to improve the stability after connection. A first through groove 13 is opened on the inner side of the connecting block 12, and a second through groove 14 is opened on the inner side of the steel foot 3. Fixing blocks 17 are in contact with the inner walls of the first through groove 13 and the second through groove 14. There are two fixing blocks 17. A fixing bolt 16 is rotatably connected to the inner side of one of the fixing blocks 17. The threaded section of the fixing bolt 16 is threadedly connected to the inner side of the other fixing block 17. The first through groove 13 and the second through groove 14 have spaces for placing the fixing blocks 17. The fixing blocks 17 form a block between the connecting block 12 and the steel foot 3, making the steel foot 3 and the connecting block 12 stable after being connected together. The two fixing blocks 17 are connected together by the fixing bolt 16 to improve the stability of the fixing blocks 17.

[0030] It should be noted that during the actual use of the device, first, the steel foot 3 is disassembled from the mandrel 1, and then the damaged umbrella skirt 5 is removed from the mandrel 1. Subsequently, the fixing sleeve 4 together with the umbrella skirt 5 is successively sleeved on the mandrel 1 until the positioning ring 9 enters the inside of the positioning groove 18. Then, the uppermost fixing sleeve 4 is locked by the hoop 7. Next, the lower pressing sleeves 8 are successively covered on the outside of the fixing sleeve 4. After the fixing sleeve 4 and the umbrella skirt 5 are installed, the mandrel 1 is taken and the connecting block 12 is inserted into the steel foot 3. Then, the fixing block 17 is inserted into the first through groove 13 and the second through groove 14. Subsequently, the fixing bolt 16 is rotated to drive the two fixing blocks 17 to approach each other. After the fixing blocks 17 approach each other, they form a blockage against the steel foot 3.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high voltage cross arm composite insulator, comprising a core rod (1), characterized in that: The top end of the mandrel (1) is provided with a wire clamping groove (2), the bottom end of the mandrel (1) is provided with a steel foot (3), the outer surface of the mandrel (1) is in contact with a plurality of fixing sleeves (4), the outer surfaces of the plurality of fixing sleeves (4) are all connected with an umbrella skirt (5), the inner sides of the plurality of fixing sleeves (4) are provided with a fixing groove (6), the inner wall of the fixing groove (6) is detachably connected with a clamp (7), the lower surface of the umbrella skirt (5) is connected with a pressing sleeve (8), the inner wall of the pressing sleeve (8) is in contact with the outer surface of the fixing sleeve (4).

2. The high voltage cross arm composite insulator according to claim 1, characterized in that: A plurality of positioning grooves (18) are provided on the inner side of the core rod (1), and the inner walls of the plurality of fixing sleeves (4) are all connected with positioning rings (9), and the outer surface of the positioning ring (9) is in contact with the inner wall of the positioning groove (18).

3. The high voltage cross arm composite insulator according to claim 1, characterized in that: The plurality of fixing sleeves (4), umbrella skirts (5), pressing sleeves (8) and positioning rings (9) are arranged at equal distances, and the diameters of the plurality of umbrella skirts (5) are different in size. The plurality of fixing sleeves (4), umbrella skirts (5), pressing sleeves (8) and positioning rings (9) are all made of silicone rubber.

4. The high voltage cross arm composite insulator according to claim 1, characterized in that: A groove (10) is provided at the top end of the core rod (1), and one of the fixing sleeves (4) is located inside the groove (10).

5. The high voltage cross arm composite insulator according to claim 1, characterized in that: The top end of the core rod (1) is in contact with a pressure plate (11), and the pressure plate (11) is located above the wire clamping groove (2). The inner side of the pressure plate (11) is rotatably connected to a locking bolt (15), and the threaded section of the locking bolt (15) is threadedly connected to the inner side of the core rod (1).

6. The high voltage cross-arm composite insulator according to claim 1, characterized in that: The bottom end of the core rod (1) is connected to a connection block (12), and the outer surface of the connection block (12) is in contact with the inner wall of the steel foot (3).

7. The high voltage cross-arm composite insulator according to claim 6, characterized in that: A first through groove (13) is formed on the inner side of the connecting block (12), and a second through groove (14) is formed on the inner side of the steel foot (3). The inner walls of the first through groove (13) and the second through groove (14) are both in contact with a fixing block (17). There are two fixing blocks (17), and a fixing bolt (16) is rotatably connected to the inner side of one of the fixing blocks (17). The threaded section of the fixing bolt (16) is threadedly connected to the inner side of the other fixing block (17).

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