Large-tonnage disc-type suspension porcelain insulator

Abstract

The utility model discloses a big tonnage disc -shaped suspension type porcelain insulator relates to porcelain insulator technical field, including porcelain main part and the steel cap and steel foot of glue dress in the both ends of porcelain main part, the steel cap has the notching on, wherein, steel foot inserts the notching in another porcelain insulator, be provided with the covering piece on steel foot, and the covering piece includes the rod cover, the cap cover and the elastic cover, the rod cover is fixed on steel foot, the elastic cover is fixed on the rod cover, the cap cover is fixed on the one end of elastic cover away from the rod cover, and the rod cover, the cap cover and the elastic cover concentricity setting. This big tonnage disc -shaped suspension type porcelain insulator, through setting up the rod cover, the cap cover and the elastic cover etc. structure, will the notching, steel foot butt joint place with the outside isolation, effectively block rainwater, dew, fog and so on water vapor invasion, prolong the life, form mechanical resistance simultaneously, effectively prevent the connector from the wide groove section and come out, improve the use efficiency of big tonnage disc -shaped suspension type porcelain insulator.

Description

Technical Field

[0001] This utility model relates to the field of porcelain insulator technology, and in particular to a large-tonnage disc suspension porcelain insulator. Background Technology

[0002] Large-tonnage disc-type suspension porcelain insulators are heavy-duty insulation components used in high-voltage / ultra-high-voltage transmission lines. The core is the combination of "large mechanical load bearing + disc-type porcelain insulation". "Large tonnage" specifically refers to a rated mechanical breaking load ≥160kN (common specifications include 160kN, 210kN, 300kN, etc.).

[0003] In existing technologies, the series connection of adjacent insulators mostly adopts a ball-and-socket snap-fit ​​structure, with the connection point directly exposed to the external environment and lacking effective sealing protection. When insulators are used in outdoor environments, the connection point is easily invaded by water vapor such as rainwater, dew, and fog. At the same time, it will absorb impurities such as dust, salt, and industrial pollutants in the air. These external factors can lead to corrosion at the connection point, reducing the mechanical strength and service life of the connection structure.

[0004] Therefore, it is necessary to propose a large-tonnage disc-type suspension porcelain insulator to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a large-tonnage disc-shaped suspension porcelain insulator to solve the problem that in the existing technology, the series connection of adjacent insulators mostly adopts a ball-and-socket snap-fit ​​structure, and the connection point is directly exposed to the external environment without effective sealing protection. When the insulator is used in an outdoor environment, the connection point is easily invaded by water vapor such as rain, dew, and fog, and will also absorb impurities such as dust, salt, and industrial pollutants in the air. These external factors can lead to corrosion at the connection point, reducing the mechanical strength and service life of the connection structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a large-tonnage disc-shaped suspension porcelain insulator, comprising a porcelain body and steel caps and steel feet glued to both ends of the porcelain body, wherein the steel caps have grooves;

[0007] The steel foot is inserted into the slot of another porcelain insulator;

[0008] The steel foot is provided with a cover, which includes a rod sleeve, a cap sleeve and an elastic sleeve. The rod sleeve is fixed to the steel foot, the elastic sleeve is fixed to the rod sleeve, and the cap sleeve is fixed to the end of the elastic sleeve away from the rod sleeve. The rod sleeve, cap sleeve and elastic sleeve are arranged concentrically. The cap sleeve is fixed to the steel cap of another porcelain insulator by a locking member, and the cap sleeve surrounds the outside of the slot on the steel cap.

[0009] Preferably, the steel cap includes a frustum portion and a cylindrical portion, wherein the cylindrical portion is glued to the ceramic body, the groove is opened on the frustum portion, and the groove includes a narrow groove section and a wide groove section, the narrow groove section and the wide groove section are connected, and the narrow groove section is located at the end of the frustum portion away from the cylindrical portion.

[0010] Preferably, the steel foot includes a rod and a connector. The rod is glued to the ceramic body and the rod sleeve is fixed to the rod. The rod is inserted into the narrow slot of another ceramic insulator, and the connector is inserted into the wide slot of another ceramic insulator.

[0011] Preferably, the locking component includes a sleeve groove, a stop rod, a round block, a spring, and a stop groove. The sleeve groove is formed on the cap, the stop rod is slidably disposed inside the sleeve groove, the round block is fixedly connected to the end of the stop rod located outside the cap, the spring is fitted onto the stop rod, one end of the spring is fixedly connected to the cap, and the other end of the spring is fixedly connected to the round block. The stop groove is formed on the outer wall of the steel cap, and the stop rod and the stop groove are inserted into each other.

[0012] Preferably, the end of the stop rod away from the circular block is provided with a beveled portion.

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

[0014] 1. This utility model isolates the slot and steel foot joint from the outside world by setting up structures such as rod sleeve, cap sleeve and elastic sleeve, effectively blocking the intrusion of water vapor such as rainwater, dew, and fog, extending the service life. At the same time, it forms a mechanical barrier to effectively prevent the connector from coming out of the wide slot section and improve the utilization efficiency of large-tonnage disc suspension porcelain insulators.

[0015] 2. This utility model achieves rapid movement of the stop rod by setting up structures such as the inclined part and the frustum, thereby improving the efficiency of the cap and the corresponding steel cap docking. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the large-tonnage disc-shaped suspension porcelain insulator of this utility model.

[0017] Figure 2 This is a schematic diagram of the ceramic body and steel foot structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the installation structure of the large-tonnage disc-shaped suspension porcelain insulator of this utility model.

[0019] Figure 4 This utility model Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0020] Figure 5 This is a schematic diagram of the rod sleeve, cap sleeve, and elastic sleeve structure of this utility model.

[0021] In the diagram: 1. Ceramic body; 2. Steel cap; 3. Groove; 301. Narrow groove section; 302. Wide groove section; 4. Steel foot; 401. Rod body; 402. Connector; 5. Rod sleeve; 6. Cap sleeve; 7. Elastic sleeve; 8. Sleeve groove; 9. Stop rod; 10. Round block; 11. Spring; 12. Beveled part; 13. Stop groove. Detailed Implementation

[0022] This utility model provides, for example Figures 1-5 The large-tonnage disc-shaped suspension porcelain insulator shown is mainly used in high-voltage / ultra-high-voltage transmission lines. It can meet the heavy-load insulation requirements of rated mechanical destructive load ≥160kN (such as 160kN, 210kN, 300kN, etc.). Specifically, it includes a porcelain body 1, with steel caps 2 and steel feet 4 glued to both ends of the porcelain body 1. The porcelain body 1 is made of high-strength porcelain material to ensure insulation performance and overall load-bearing capacity; the steel caps 2 and steel feet 4 are made of weathering steel to improve the corrosion resistance of the foundation.

[0023] The steel cap 2 is divided into a frustum and a cylindrical part. The cylindrical part is glued to the ceramic body 1. The frustum has a slot 3 for series connection. The slot 3 is further divided into a narrow slot section 301 and a wide slot section 302, which are connected to each other. The narrow slot section 301 is located at the end of the frustum away from the cylindrical part, forming a "narrow outside and wide inside" connection space. The corresponding steel foot 4 is composed of a rod 401 and a connector 402. The rod 401 is glued to the ceramic body 1. The diameter of the connector 402 is larger than that of the rod 401 and is adapted to the wide slot section 302 of the slot 3.

[0024] When connecting two adjacent insulators in series, the rod 401 of the upper insulator steel foot 4 is first inserted into the narrow slot 301 of the lower insulator steel cap 2, and then the connector 402 slides into the wide slot 302. The wide slot 302 limits the connector 402, thus achieving the initial locking of the mechanical structure and preventing axial detachment.

[0025] Considering that in the existing technology, the groove 3 and the steel foot 4 are directly exposed after docking, which is not only susceptible to corrosion from external moisture, dust, salt and industrial pollutants, leading to corrosion and reduced mechanical strength at the docking point, but also the groove 3 creates a retention space, making it difficult for water droplets to drain and causing them to remain for a long time, further aggravating the corrosion risk, in order to protect the docking point of the groove 3 and the steel foot 4, a cover is provided on the steel foot 4. The cover includes a rod sleeve 5, a cap sleeve 6 and an elastic sleeve 7. The rod sleeve 5 is fixed on the steel foot 4, the elastic sleeve 7 is fixed on the rod sleeve 5 and surrounds the outside of the connector 402, and the cap sleeve 6 is fixed on the end of the elastic sleeve 7 away from the rod sleeve 5, and the rod sleeve 5, cap sleeve 6 and elastic sleeve 7 are concentrically arranged.

[0026] The cover consists of a rod sleeve 5, a cap sleeve 6, and an elastic sleeve 7. All three components are resistant to high temperatures, corrosion, and thermal expansion and contraction, and are made of appropriate materials according to functional requirements.

[0027] The pole sleeve 5 is made of reinforced polyether ether ketone (PEEK) material, which has high mechanical strength, good dimensional stability, and can withstand outdoor temperature changes of -40℃ to 120℃ for a long time. It is also resistant to acids and alkalis and anti-aging. After being fixed to the pole body 401 of the steel foot 4 by tight fit or adhesive bonding, it can form a rigid seal with the outer wall of the pole body 401, preventing moisture from seeping in from the pole body 401 of the steel foot 4.

[0028] The cap cover 6 is made of weather-resistant stainless steel or high-strength aluminum alloy. The surface is treated with anodizing, passivation or powder coating for corrosion protection. It has excellent mechanical strength, weather resistance and structural stability. Its temperature range covers -50℃ to 150℃, which can resist the corrosion of harsh outdoor environments. The inner wall of the cap cover 6 can be equipped with sealing rings and other structures to reduce wear when it is connected to the cap cover 6 and ensure sealing.

[0029] The elastic sleeve 7 is made of hydrogenated nitrile butadiene rubber (HNBR) or fluororubber to meet the requirements of elastic sealing and deformation adaptation. This material can maintain good elasticity and flexibility in a wide temperature range of -30℃ to 150℃, and has excellent aging resistance, oil resistance and chemical corrosion resistance. It can adapt to the slight shaking or displacement of the insulator string during operation. At the same time, it fills the gap between the sleeve 5 and the cap 6 through its own elastic deformation to form an elastic seal and avoid the seal failure caused by rigid connection.

[0030] The cap 6 is fixed to the steel cap 2 of another porcelain insulator by a locking component. The locking component includes a sleeve groove 8, a stop rod 9, a round block 10, a spring 11, and a stop groove 13. The sleeve groove 8 is opened on the cap 6. The stop rod 9 is slidably disposed inside the sleeve groove 8. The round block 10 is fixedly connected to the end of the stop rod 9 located outside the cap 6. The spring 11 is fitted on the stop rod 9. One end of the spring 11 is fixedly connected to the cap 6, and the other end of the spring 11 is fixedly connected to the round block 10. The stop groove 13 is opened on the outer wall of the steel cap 2. The stop rod 9 and the stop groove 13 are inserted and matched. The elastic support force of the spring 11 is appropriate, so that the stop rod 9 and the others will not slide arbitrarily.

[0031] During installation, the rod 401 of the upper insulator steel foot 4 is first inserted into the narrow slot 301 of the lower insulator steel cap 2, and then the connector 402 slides into the wide slot 302 to achieve the initial engagement of the mechanical structure. Then, the round block 10 is pulled outward to move the stop rod 9 away from the axis of the cap sleeve 6. Next, the cap sleeve 6 is moved downward. After the stop rod 9 aligns with the stop groove 13, the round block 10 is released. The return force of the spring 11 causes the stop rod 9 to insert into the stop groove 13, thus fixing the cap sleeve 6 on the steel cap 2. The rod sleeve 5, elastic sleeve 7, and cap sleeve 6 work together to isolate the joint between the slot 3 and the steel foot 4 from the outside world, effectively preventing the intrusion of water vapor such as rainwater, dew, and fog.

[0032] When the cap 6 is fitted onto the steel cap 2 of the lower insulator, it will be located at the connection between the frustum and the cylindrical part of the steel cap 2. At this time, the cap 6 surrounds the outside of the slot 3 on the steel cap 2, forming a mechanical block on the connector 402 of the steel foot 4 from the outside, effectively preventing the connector 402 from coming out of the wide slot 302. At the same time, the rod sleeve 5, the cap 6 and the elastic sleeve 7 work together to completely wrap the mating part.

[0033] In summary, this utility model, by setting up structures such as the rod sleeve 5, the cap sleeve 6, and the elastic sleeve 7, isolates the joint between the slot 3 and the steel foot 4 from the outside world, effectively preventing the intrusion of water vapor such as rainwater, dew, and fog, thus extending the service life. At the same time, it forms a mechanical barrier, effectively preventing the connector 402 from coming out of the wide slot section 302, thereby improving the utilization efficiency of large-tonnage disc suspension porcelain insulators.

[0034] The end of the stop rod 9 away from the circular block 10 is provided with a beveled portion 12, which mates with the frustum portion of the steel cap 2, as shown in the reference. Figure 4 When the control cap 6 moves from top to bottom and aligns with the steel cap 2, the inclined part 12 abuts against the truncated cone of the steel cap 2. Guided by the outer wall of the truncated cone, the stop rod 9 moves rapidly away from the axis of the cap 6. After the stop rod 9 aligns with the stop groove 13, the stop rod 9 is inserted into the stop groove 13.

[0035] Furthermore, ball bearings or other structures can be installed at the 12th beveled part to reduce wear with the truncated cone of the steel cap 2.

Claims

1. A large-tonnage disc-shaped suspension porcelain insulator, comprising a porcelain body (1) and steel caps (2) and steel feet (4) glued to both ends of the porcelain body (1), characterized in that: The steel cap (2) has a slot (3); Among them, the steel foot (4) is inserted into the slot (3) of another porcelain insulator; The steel foot (4) is provided with a cover, which includes a rod sleeve (5), a cap (6) and an elastic sleeve (7). The rod sleeve (5) is fixed on the steel foot (4), the elastic sleeve (7) is fixed on the rod sleeve (5), and the cap (6) is fixed on the end of the elastic sleeve (7) away from the rod sleeve (5). The rod sleeve (5), the cap (6) and the elastic sleeve (7) are arranged concentrically. The cap (6) is fixed to the steel cap (2) of another porcelain insulator by a locking member, and the cap (6) surrounds the outside of the slot (3) on the steel cap (2).

2. The large-tonnage disc-shaped suspension porcelain insulator according to claim 1, characterized in that: The steel cap (2) includes a frustum and a cylindrical part, wherein the cylindrical part is glued to the ceramic body (1), and the slot (3) is opened on the frustum. The slot (3) includes a narrow slot section (301) and a wide slot section (302), which are connected. The narrow slot section (301) is located at the end of the frustum away from the cylindrical part.

3. The large-tonnage disc-shaped suspension porcelain insulator according to claim 2, characterized in that: The steel foot (4) includes a rod body (401) and a connector (402). The rod body (401) is glued to the ceramic body (1), and the rod sleeve (5) is fixed on the rod body (401). The rod body (401) is inserted into the narrow slot section (301) of another ceramic insulator, and the connector (402) is inserted into the wide slot section (302) of another ceramic insulator.

4. The large-tonnage disc-shaped suspension porcelain insulator according to claim 2, characterized in that: The locking component includes a sleeve groove (8), a stop rod (9), a round block (10), a spring (11), and a stop groove (13). The sleeve groove (8) is opened on the cap (6). The stop rod (9) is slidably disposed inside the sleeve groove (8). The round block (10) is fixedly connected to one end of the stop rod (9) located outside the cap (6). The spring (11) is fitted on the stop rod (9). One end of the spring (11) is fixedly connected to the cap (6), and the other end of the spring (11) is fixedly connected to the round block (10). The stop groove (13) is opened on the outer wall of the steel cap (2). The stop rod (9) and the stop groove (13) are inserted into each other.

5. The large-tonnage disc-shaped suspension porcelain insulator according to claim 4, characterized in that: The stop rod (9) has a beveled part (12) at the end away from the round block (10).

Images