High-strength low-temperature-resistant porcelain insulator

Abstract

The utility model discloses a high -strength low temperature type porcelain insulator, relates to insulator technical field, including umbrella skirt, the top fixedly connected with metal cap of umbrella skirt, and the bottom fixedly connected with metal pole of umbrella skirt, the bottom fixedly connected with the butt joint ball of metal pole, the bottom of butt joint ball is provided with auxiliary assembly, the inside of arc block is provided with arc slot, and the center of arc slot and through groove coincide. The utility model discloses through setting up auxiliary assembly, and the center of arc block and arc slot in auxiliary assembly and through groove keep coinciding, cooperate the second bolt of being arranged in the arc slot, form the limiting structure of adapting with butt joint ball rotation track, this design can accurate constraint the swing angle of butt joint ball, avoid its excessive swing under the working condition such as big wind, icing drop or equipment vibration, can effectively reduce the stress concentration of porcelain piece and metal accessory junction, reduce the risk of cracking.

Description

Technical Field

[0001] This utility model relates to the field of insulator technology, and in particular to a high-strength, low-temperature resistant porcelain insulator. Background Technology

[0002] An insulator is a device installed between conductors at different potentials or between a conductor and a grounding component, capable of withstanding voltage and mechanical stress. There are many types of insulators with different shapes. Although the structure and appearance of different types of insulators vary greatly, they are all composed of two main parts: insulating components and connecting hardware.

[0003] A patent with the patent title (patent application number: 202421459457.4) discloses a high-strength, low-temperature resistant porcelain insulator, relating to the field of porcelain insulator technology. The insulator includes a porcelain component with a metal cap glued to its top using adhesive. A groove is integrally formed on the bottom of the porcelain component, and a metal rod is glued to the inside of the groove using adhesive. A connecting ball is integrally formed at the bottom of the metal rod, and a circular groove is formed through the connecting ball. A connecting groove is formed on the metal cap, and circular holes are formed on both sides of the metal cap, communicating with the connecting groove. A bolt passes through the two circular holes, and the inner diameter of the circular groove is larger than the outer diameter of the bolt. By setting up the connecting ball, circular groove, and bolt, the connecting ball will not slip out of the connecting groove, improving the stability of the connection between two adjacent porcelain insulators. Simultaneously, because the inner diameter of the circular groove is larger than the outer diameter of the bolt, the metal rod can swing in multiple directions, improving the flexibility of the porcelain insulator in use.

[0004] In the above case, during use, the metal rod can swing in multiple directions through the gap between the groove and the bolt. While this improves the flexibility of use, in scenarios with strong winds or large changes in line load, the swing amplitude of the metal rod may be too large. Excessive swing will cause frequent friction between the mating ball and the inner wall of the mating groove, accelerating component wear. At the same time, it will also subject the bolt to additional shear force and torque, increasing the risk of bolt breakage and ultimately affecting the overall stability of the insulator.

[0005] Therefore, it is necessary to propose a high-strength, low-temperature resistant porcelain insulator to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a high-strength, low-temperature resistant porcelain insulator to solve the problem mentioned in the background art that, in scenarios with strong winds or large changes in line load, the metal rod may swing too much. Excessive swinging will cause frequent friction between the mating ball and the inner wall of the mating groove, accelerating component wear. At the same time, it will also subject the bolt to additional shear force and torque, increasing the risk of bolt breakage and affecting the overall stability of the insulator.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-strength, low-temperature resistant porcelain insulator, comprising a skirt, a metal cap fixedly connected to the top of the skirt, and a metal rod fixedly connected to the bottom of the skirt, wherein a connecting ball is fixedly connected to the bottom end of the metal rod;

[0008] The bottom of the docking ball is provided with an auxiliary component, which includes an arc-shaped block. The arc-shaped block has an arc-shaped groove inside, and the center of the arc-shaped groove coincides with the center of the through groove. The bottom of the inner cavity of the metal cap has a rotating groove, and the side of the inner cavity of the metal cap has an insertion groove. The insertion groove is connected to the rotating groove. A second bolt is inserted into the insertion groove. The second bolt is located inside the arc-shaped groove. A fixing plate is fixedly connected to the outside of the second bolt. A positioning nut is threadedly connected to the outside of the second bolt. The diameter of the fixing plate and the positioning nut is smaller than the diameter of the insertion groove.

[0009] Preferably, the arc-shaped block is located inside the rotating groove.

[0010] Preferably, the diameter of the screw head at one end of the second bolt and the diameter of the external fixing nut are both greater than the diameter of the insertion groove.

[0011] Preferably, the inside of the docking ball is provided with a through groove, and a first bolt is inserted into the inside of the metal cap, the first bolt being located inside the through groove.

[0012] Preferably, the top of the inner cavity of the metal cap is provided with a docking groove, and the docking ball is located inside the docking groove.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. By setting auxiliary components, the center of the arc block and the arc groove in the auxiliary components are kept to coincide with the through groove. With the second bolt inserted in the arc groove, a limiting structure adapted to the rotation trajectory of the docking ball is formed. This design can accurately constrain the swing angle of the docking ball and prevent it from swinging excessively under working conditions such as strong winds, ice falling off or equipment vibration. It can effectively reduce stress concentration at the connection between ceramic parts and metal accessories and reduce the risk of cracking.

[0015] 2. The mating structure of the arc groove and the second bolt bears most of the mechanical force generated by the swing, so that the first bolt mainly bears the axial fastening load, avoiding the superposition of shear force and torque. This protection mechanism can reduce the probability of bolt fatigue failure and prevent the overall stability of the insulator from decreasing due to damage to the core connecting parts.

[0016] 3. By rotating the positioning nut, the arc-shaped block can be flexibly switched between two states: "movable limit" and "rigid fixation". When the positioning nut is loosened, the arc-shaped block can rotate along the rotating groove. The swing amplitude can be controlled by the cooperation between the arc-shaped groove and the second bolt, which can meet the needs of fine-tuning the angle during line construction. After tightening the positioning nut, it forms a clamping limit on the arc-shaped block with the fixing plate, which completely locks the position of the metal rod and prevents it from shifting in strong disturbance environments such as typhoons. This dual-mode design greatly improves the adaptability of the insulator to different installation scenarios and reduces the difficulty of construction adjustment caused by structural fixation. Attached Figure Description

[0017] Figure 1 This is a partial cross-sectional schematic diagram of the high-strength, low-temperature resistant porcelain insulator of this utility model.

[0018] Figure 2 In this utility model Figure 1 Enlarged diagram of point A.

[0019] Figure 3 This is a schematic diagram of the arc-shaped block in this utility model.

[0020] In the diagram: 1. Umbrella skirt; 2. Metal cap; 3. Metal rod; 4. Connecting ball; 5. First bolt; 6. Through groove; 7. Connecting groove; 8. Arc block; 9. Arc groove; 10. Rotating groove; 11. Insertion groove; 12. Second bolt; 13. Fixing plate; 14. Positioning 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] This utility model provides, for example Figures 1-3The high-strength, low-temperature resistant porcelain insulator shown includes a skirt 1, a metal cap 2 fixedly connected to the top of the skirt 1, and a metal rod 3 fixedly connected to the bottom of the skirt 1. A butt ball 4 is fixedly connected to the bottom end of the metal rod 3. A through groove 6 is formed inside the butt ball 4. A first bolt 5 is inserted into the metal cap 2, located inside the through groove 6. A butt groove 7 is formed at the top of the inner cavity of the metal cap 2, and the butt ball 4 is located inside the butt groove 7. The high-strength, low-temperature resistant porcelain insulator uses the skirt 1 as the core insulating carrier. The metal cap 2 fixed at the top and the metal rod 3 fixed at the bottom form a mechanical connection frame. The butt ball 4 at the bottom end of the metal rod 3 serves as a key moving connector, embedded in the butt groove 7 at the top of the inner cavity of the metal cap 2, forming a basic assembly structure. The first bolt 5 passes through the through groove 6 inside the butt ball 4 and is inserted into the metal cap 2, realizing the initial connection between the butt ball 4 and the metal cap 2.

[0023] In addition, an auxiliary component is provided at the bottom of the docking ball 4. The auxiliary component includes an arc-shaped block 8. An arc-shaped groove 9 is opened inside the arc-shaped block 8. The center of the arc-shaped groove 9 coincides with the center of the through groove 6. A rotating groove 10 is opened at the bottom of the inner cavity of the metal cap 2. An insertion groove 11 is opened on the side of the inner cavity of the metal cap 2. The insertion groove 11 is connected to the rotating groove 10. A second bolt 12 is inserted into the insertion groove 11. The second bolt 12 is located inside the arc-shaped groove 9. A fixing plate 13 is fixedly connected to the outside of the second bolt 12. A positioning nut 14 is threadedly connected to the outside of the second bolt 12. The diameter values ​​of the fixing plate 13 and the positioning nut 14 are both smaller than the hole diameter value of the insertion groove 11. The arc-shaped block 8 is located inside the rotating groove 10. The diameter values ​​of the screw head at one end of the second bolt 12 and the external fixing nut are both larger than the hole diameter value of the insertion groove 11. When the docking ball 4 swings due to factors such as strong winds or equipment vibration, it will drive the arc block 8 to rotate synchronously. The arc trajectory of the arc groove 9 and the cooperation of the second bolt 12 will limit the rotation angle of the arc block 8, thereby constraining the swing amplitude of the docking ball 4, preventing excessive swinging from causing stress concentration at the connection between the ceramic part and the metal accessory, and avoiding the embrittlement and cracking of the ceramic material at low temperature.

[0024] Next, during the swinging of the connecting ball 4, the mating structure between the arc groove 9 and the second bolt 12 bears most of the shear force and torque generated by the swing, allowing the first bolt 5 to bear only the axial tightening load and avoiding fatigue failure caused by additional force. Especially in low-temperature environments, where the toughness of metal materials decreases, this protective mechanism can significantly reduce the risk of breakage of the first bolt 5 and ensure the overall stability of the insulator.

[0025] Finally, the rotating positioning nut 14 can switch between two fixing modes. When the positioning nut 14 is loosened, the arc-shaped block 8 can rotate freely in the rotating groove 10. The swing amplitude is controlled by the cooperation between the arc-shaped groove 9 and the second bolt 12, which meets the needs of fine-tuning the angle during line construction. After tightening the positioning nut 14, the positioning nut 14 and the fixing plate 13 will generate a clamping force on the arc-shaped block 8, fixing it in the rotating groove 10, completely locking the position of the metal rod 3, and preventing displacement in strong disturbance environments such as typhoons.

Claims

1. A high-strength, low-temperature resistant porcelain insulator, comprising a skirt (1), characterized in that: The top of the umbrella skirt (1) is fixedly connected to a metal cap (2), and the bottom of the umbrella skirt (1) is fixedly connected to a metal rod (3), and the bottom end of the metal rod (3) is fixedly connected to a connecting ball (4). The bottom of the docking ball (4) is provided with an auxiliary component, which includes an arc block (8). The arc block (8) has an arc groove (9) inside. The center of the arc groove (9) coincides with the center of the through groove (6). The bottom of the inner cavity of the metal cap (2) has a rotating groove (10). The side of the inner cavity of the metal cap (2) has a plug groove (11). The plug groove (11) is connected to the rotating groove (10). A second bolt (12) is inserted into the plug groove (11). The second bolt (12) is located inside the arc groove (9). A fixing plate (13) is fixedly connected to the outside of the second bolt (12). A positioning nut (14) is threadedly connected to the outside of the second bolt (12). The diameter of the fixing plate (13) and the positioning nut (14) is smaller than the hole diameter of the plug groove (11).

2. The high-strength, low-temperature resistant porcelain insulator according to claim 1, characterized in that: The arc-shaped block (8) is located inside the rotating groove (10).

3. The high-strength, low-temperature resistant porcelain insulator according to claim 1, characterized in that: The diameter of the screw head at one end of the second bolt (12) and the diameter of the external fixing nut are both greater than the diameter of the insertion groove (11).

4. A high-strength, low-temperature resistant porcelain insulator according to claim 1, characterized in that: The docking ball (4) has a through groove (6) inside, and a first bolt (5) is inserted into the metal cap (2). The first bolt (5) is located inside the through groove (6).

5. A high-strength, low-temperature resistant porcelain insulator according to claim 4, characterized in that: The top of the inner cavity of the metal cap (2) is provided with a docking groove (7), and the docking ball (4) is located inside the docking groove (7).

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