Porcelain bushing lightning arrester

Abstract

The utility model discloses a porcelain bushing lightning arrester, which relates to the technical field of porcelain bushing lightning arrester core bodies and comprises a porcelain bushing and a plurality of core bodies which are arranged in the porcelain bushing, are sequentially arranged and are connected through middle connecting columns, an upper flange plate is arranged at the top of the porcelain bushing, a lower flange plate is arranged at the bottom of the porcelain bushing, and the plurality of core bodies are connected through the middle connecting columns. The core body at the top is connected with the upper flange plate through the upper connecting column, the core body at the bottom is connected with the lower flange plate through the lower connecting column, so that the core bodies are more stable in the porcelain bushing and are prevented from being in contact with the inner wall of the porcelain bushing, the insulating rod, the metal cushion block, the anti-collision plate and the fixed flange form a cavity, and the stacked resistor discs are limited in the cavity; the anti-collision plate further ensures that the core body and the inner wall of the porcelain bushing are prevented from being collided and damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of porcelain bushing arrester cores, in particular to a porcelain bushing arrester. Background Art

[0002] A porcelain bushing arrester is a power device used to protect electrical equipment, buildings, and personnel from high transient overvoltages and limit the follow - current time. It is usually made of porcelain material, has good insulation performance and durability, can effectively receive and disperse lightning strike current, and protect equipment from damage. Porcelain bushing arresters are usually installed at vulnerable positions such as the roofs of buildings, elevated equipment, and power lines. When lightning strikes a building or equipment, the porcelain bushing arrester quickly conducts the current to the ground, avoiding damage to the equipment caused by overvoltage and protecting the safety of personnel.

[0003] Under normal circumstances, the porcelain bushing arrester is in a high - resistance state, and the leakage current is very small, which does not affect the safe operation of the system. When the system is struck by lightning or experiences an overvoltage, the porcelain bushing arrester quickly conducts, short - circuiting the overvoltage to the ground through the outer shell. The function of the porcelain bushing arrester is to limit the overvoltage generated in the system. To meet the special requirements of customers for the square wave, large current, and repetitive transferred charge of the arrester, resistors with a larger diameter need to be used. The porcelain bushing arrester usually consists of a porcelain bushing and several cores. The resistor stacks form the core of the porcelain bushing arrester and are fixed inside the porcelain bushing. Since the inner diameter size of the porcelain bushing is fixed, when resistors with a larger diameter are used due to special requirements, the gap between the core and the inner wall of the porcelain bushing is small. There is a risk that the core collides with the inner wall of the porcelain bushing during the transportation of the porcelain bushing arrester product. In special environments such as poor transportation conditions, bumps, and vibrations, it is easy to cause damage to the inner wall of the porcelain bushing or the core, resulting in significant losses. Summary of the Utility Model

[0004] In order to overcome the defect of collision and damage between the core of the porcelain bushing arrester and the inner wall of the porcelain bushing in the prior art, the utility model provides a porcelain bushing arrester.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows: A porcelain bushing lightning arrester includes a porcelain bushing and a number of cores arranged in sequence inside the porcelain bushing and connected by a middle connecting column. The top of the porcelain bushing is provided with an upper flange, and the bottom of the porcelain bushing is provided with a lower flange. The top core is connected to the upper flange through an upper connecting column, and the bottom core is connected to the lower flange through a lower connecting column. The core includes stacked resistor plates. Metal pads are provided on both the upper and lower sides of the stacked resistor plates. An anti-collision plate is provided on the outside of each metal pad, and a fixed flange is provided on the outside of each anti-collision plate. A number of insulating rods are provided on the outside of the stacked resistor plates. The two ends of the insulating rods are respectively connected and fixed to the anti-collision plates and fixed flanges on the upper and lower sides of the stacked resistor plates through nuts. The stacked resistor plates are limited within the cavity formed by the insulating rods, metal pads, anti-collision plates, and fixed flanges.

[0006] As a further improvement of the utility model, grooves are provided on the lower side of the upper flange, the upper side of the lower flange, and both the upper and lower sides of the fixed flange.

[0007] As a further improvement of the utility model, the middle connecting column, the upper connecting column, and the lower connecting column are all two-end boss columns.

[0008] As a further improvement of the utility model, a number of through holes are evenly distributed on the anti-collision plates.

[0009] As a further improvement of the utility model, the middle part of the anti-collision plate is hollow and is installed with an anti-collision pad.

[0010] As a further improvement of the utility model, the porcelain bushing is made of high-aluminum material, and the upper flange and the lower flange are made of high-strength cast aluminum alloy material.

[0011] Compared with the prior art, the utility model has the following beneficial effects: In this solution, a number of cores are connected by a middle connecting column. The top core is connected to the upper flange through an upper connecting column, and the bottom core is connected to the lower flange through a lower connecting column, making the cores more stable inside the porcelain bushing and preventing the cores from contacting the inner wall of the porcelain bushing. The insulating rods, metal pads, anti-collision plates, and fixed flanges form a cavity, and the stacked resistor plates are limited within the cavity. The anti-collision plates further ensure that the cores and the inner wall of the porcelain bushing are protected from collision damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following further describes the utility model in conjunction with the drawings and specific embodiments.

[0013] Figure 1 It is a schematic structural diagram of a porcelain bushing lightning arrester of the utility model.

[0014] Figure 2 It is a schematic structural diagram of the core of the utility model.

[0015] Figure 3This is a schematic structural diagram of the anti-collision plate of the utility model.

[0016] In the figure: 1, porcelain bushing; 2, core body; 3, upper flange; 4, lower flange; 5, resistor sheet; 6, metal spacer; 7, anti-collision plate; 8, fixed flange; 9, insulating rod; 10, nut; 11, middle connecting column; 12, upper connecting column; 13, lower connecting column; 14, through hole; 15, anti-collision spacer; 16, fastening sleeve. Specific embodiments

[0017] In order to make the technical solutions and beneficial effects of the utility model clearer and more understandable, the utility model will be further described in detail below in conjunction with specific embodiments.

[0018] Refer to Figure 1 and Figure 2 An embodiment of the utility model discloses a porcelain bushing lightning arrester, which includes a porcelain bushing 1 and a plurality of core bodies 2 arranged in sequence inside the porcelain bushing 1 and threadedly connected through a middle connecting column 11. An upper flange 3 is provided at the top of the porcelain bushing 1, and a lower flange 4 is provided at the bottom of the porcelain bushing 1. The core body 2 at the top is threadedly connected to the upper flange 3 through an upper connecting column 12, and the core body 2 at the bottom is threadedly connected to the lower flange 4 through a lower connecting column 13. The core body 2 includes resistor sheets 5 stacked and formed. Metal spacers 6 are provided on both the upper and lower sides of the stacked and formed resistor sheets 5. An anti-collision plate 7 is provided outside each metal spacer 6, and a fixed flange 8 is provided outside each anti-collision plate 7. A plurality of insulating rods 9 are provided outside the stacked and formed resistor sheets 5. The two ends of the insulating rods 9 respectively connect and fix the anti-collision plates 7 and the fixed flanges 8 on both the upper and lower sides of the stacked and formed resistor sheets 5 through nuts 10. The stacked and formed resistor sheets 5 are limited in the cavity formed by the insulating rods 9, metal spacers 6, anti-collision plates 7 and fixed flanges 8.

[0019] Among them, grooves are provided on the lower side of the upper flange 3, the upper side of the lower flange 4, and both the upper and lower sides of the fixed flange 8. The middle connecting column 11, the upper connecting column 12 and the lower connecting column 13 are all two-end boss columns, and the boss columns are respectively clamped in the corresponding grooves, making the connection more stable.

[0020] The porcelain bushing 1 is made of high-aluminum material, and the upper flange 3 and the lower flange 4 are made of high-strength cast aluminum alloy material. A plurality of core bodies 2 are connected through a middle connecting column 11. The core body 2 at the top is connected to the upper flange 3 through an upper connecting column 12, and the core body 2 at the bottom is connected to the lower flange 4 through a lower connecting column 13, making the core body 2 more stable inside the porcelain bushing 1 and preventing the core body 2 from contacting the inner wall of the porcelain bushing 1. The insulating rods 9, metal spacers 6, anti-collision plates 7 and fixed flanges 8 form a cavity, and the stacked and formed resistor sheets 5 are limited in the cavity. The anti-collision plate 7 further ensures that the core body 2 and the inner wall of the porcelain bushing 1 are protected from collision damage.

[0021] The anti-collision plate 7 is made of polytetrafluoroethylene, which has good chemical stability, corrosion resistance, and anti-aging properties. Its performance is stable and it can be used under high voltage for a long time. It has good mechanical properties, high lubricity, and buffering performance, which can ensure that the core porcelain bushing is not damaged by collision during transportation.

[0022] Refer to Figure 2 , several fastening sleeves 16 are provided on the outside of the insulating rod 9, making the core 2 more stable.

[0023] Refer to Figure 3 , the porcelain bushing arrester needs to be evacuated and inflated. After adding the anti-collision plate 7, in order to prevent affecting the evacuation and inflation, several through holes 14 are evenly distributed on the anti-collision plate 7 to ensure the smooth progress of evacuation and inflation.

[0024] The middle part of the anti-collision plate 7 is hollow and is installed with an anti-collision cushion block 15. The anti-collision cushion block 15 is made of metal. The fixed flange 8 is designed to sink by 2 mm. The anti-collision cushion block 15 is installed in the fixed flange 8 to ensure that the anti-collision cushion block 15 and the anti-collision plate 7 are firmly fixed. The anti-collision cushion block 15 can clamp the anti-collision plate 7 on the fixed flange 8, ensuring the overall conduction of the core while ensuring that the anti-collision plate 7 has no crosstalk, thereby improving the stability of the stacked and formed resistor chips 5.

[0025] It should be understood that the specific embodiments described herein are only for understanding the present invention and are not used to limit the present invention. All other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

Claims

1. A porcelain sleeve arrester, characterized in that: The invention comprises a porcelain sleeve (1) and a plurality of core bodies (2) arranged inside the porcelain sleeve (1) and arranged in sequence and connected via a middle connecting column (11); an upper flange (3) is provided at the top of the porcelain sleeve (1); a lower flange (4) is provided at the bottom of the porcelain sleeve (1); the core body (2) at the top is connected to the upper flange (3) via an upper connecting column (12); the core body (2) at the bottom is connected to the lower flange (4) via a lower connecting column (13); the core body (2) comprises a stacked resistor sheet (5); metal pads are provided on both the upper and lower sides of the stacked resistor sheet (5) Blocks (6), each metal pad (6) is provided with an anti-collision plate (7) on the outside, each anti-collision plate (7) is provided with a fixing flange (8) on the outside, a plurality of insulating rods (9) are provided on the outside of the stacked resistor sheets (5), and the two ends of the insulating rods (9) are respectively connected and fixed to the anti-collision plates (7) and the fixing flanges (8) on the upper and lower sides of the stacked resistor sheets (5) through nuts (10), and the stacked resistor sheets (5) are limited in a cavity formed by the insulating rods (9), the metal pads (6), the anti-collision plates (7) and the fixing flanges (8).

2. A porcelain sleeve lightning arrester according to claim 1, characterized in that: The lower side of the upper flange (3), the upper side of the lower flange (4) and the upper and lower sides of the fixed flange (8) are all provided with grooves.

3. A porcelain sleeve lightning arrester according to claim 2, characterized in that: The middle connecting column (11), the upper connecting column (12) and the lower connecting column (13) are all boss columns with two ends.

4. A porcelain sleeve lightning arrester according to claim 3, characterized in that: A plurality of through holes (14) are evenly distributed on the anti-collision plate (7).

5. A porcelain sleeve lightning arrester according to claim 4, characterized in that: The middle part of the anti-collision plate (7) is hollow and is provided with an anti-collision pad (15).

6. A porcelain sleeve lightning arrester according to claim 5, characterized in that: The porcelain sleeve (1) is made of high-aluminum material, and the upper flange (3) and the lower flange (4) are made of high-strength cast aluminum alloy material.

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