Cleaning device for transformer insulating bushings

Abstract

The utility model discloses a kind of cleaning devices of transformer insulating bushing, comprising: upper mounting plate, lower mounting plate, connecting rod, spherical fan, mounting rod and brush;The upper mounting plate is installed on the smooth pipe body on the upper portion of insulating bushing body " porcelain skirt area", and the lower mounting plate is installed on the smooth pipe body on the lower portion of insulating bushing body " porcelain skirt area";Upper mounting plate, lower mounting plate can rotate around smooth pipe body;The utility model solves the problem that the cleaning of distribution transformer insulating bushing mostly relies on artificial periodic cleaning, this mode not only consumes a lot of manpower and material resources, but also cleaning cycle is difficult to accurately control, and the performance of insulating bushing can still be affected by pollutant accumulation within cleaning interval.

Description

Technical Field

[0001] This utility model relates to the field of transformer insulating bushing maintenance technology, and specifically provides a surface device for transformer insulating bushings. Background Technology

[0002] The insulating bushing of a transformer is the main insulation device outside the transformer tank. The leads of the transformer windings must pass through the insulating bushing to insulate between the leads and between the leads and the transformer casing. It also serves to secure the leads. However, the insulating bushing requires regular cleaning, which is one of the key maintenance aspects to ensure the safe and stable operation of the transformer. The cleanliness of the insulating bushing directly affects its insulation performance and heat dissipation efficiency; in severe cases, it can lead to serious faults such as leakage, flashover, or even equipment burnout. Therefore, the power industry has included it in its routine maintenance.

[0003] In existing technologies, manual cleaning of insulating bushings is often used. Since manual cleaning requires power outages, the cleaning intervals are usually long. However, over time, some difficult-to-clean dirt accumulates on the surface of the insulating bushing. Furthermore, due to the special insulation structure of the insulating bushing, cleaning each piece and seam of the complex structure, such as the gaps between the ceramic skirts, is often time-consuming and inefficient. In addition, when cleaning manually with a brush, if the working space is narrow (such as the small distance between the transformer and other equipment), or if the operator is fatigued and unstable, situations such as "brush handle hitting the ceramic skirt" or "pressing the flange sealing surface too hard" are likely to occur.

[0004] In summary, it is very meaningful to provide a cleaning device for transformer insulating bushings to address the above problems. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a cleaning device for transformer insulating bushings to solve the above-mentioned technical problems.

[0006] The technical solution provided by this utility model is: a cleaning device for transformer insulating bushings, comprising: an upper mounting plate, a lower mounting plate, a connecting rod, a spherical fan, a mounting rod, and a brush; The upper mounting plate is installed on the smooth tube body above the "ceramic skirt area" of the insulating sleeve body, and the lower mounting plate is installed on the smooth tube body below the "ceramic skirt area" of the insulating sleeve body; the upper mounting plate and the lower mounting plate can rotate around the smooth tube body; The two ends of the connecting rod are connected between the upper mounting plate and the lower mounting plate, and the connection point is located at the edge of the surface of the upper mounting plate and the lower mounting plate, outside the "porcelain skirt area" of the transformer body; The spherical fan is provided in several parts, which are evenly distributed and connected to the outer wall of the upper mounting plate; The mounting rod body includes connectors at both ends and a "brush carrying area" in the middle. The connectors at both ends are fixed to the upper mounting plate and the lower mounting plate, respectively. The "brush carrying area" matches the outer periphery and extension path of the "ceramic skirt" on one side of the insulating sleeve (1) body. The brush is fixedly connected to the "brush carrying area" in the middle of the mounting rod and installed on the side close to the insulating sleeve. The brush bristles are in contact with the outer wall of the "ceramic skirt area" on one side of the insulating sleeve.

[0007] Preferably, the inner wall of the central mounting hole of the lower mounting plate is rotatably connected to a fixing ring via a sealed bearing, and the fixing ring is sleeved on the smooth tube body at the lower part of the "ceramic skirt area" of the insulating sleeve body; The inner wall of the central mounting hole of the upper mounting plate is rotatably connected to a mounting ring via a sealed bearing. The mounting ring is sleeved on the smooth tube body above the "ceramic skirt area" of the insulating sleeve body.

[0008] Preferably, the mounting location of the upper mounting plate is further provided with a reinforcing component, and two sets of the reinforcing components are symmetrically arranged and installed on both sides of the smooth tube body above the "ceramic skirt area" of the insulating sleeve body; The reinforcement assembly includes an annular plate, a clamping plate, a threaded rod, and an adjusting block. The annular plate is rotatably mounted on the inner wall of the upper mounting plate via a sealed bearing, and the mounting ring is sleeved on the outer wall of the smooth tube. The annular plate is sleeved on the mounting ring, and the annular plate is provided with a threaded hole located above the upper mounting plate. The threaded rod passes through the threaded hole and through the annular plate. The clamping plate and the adjusting block are respectively located at both ends of the threaded rod. The clamping plate is pressed against the outer wall of the insulating tube. The adjusting block is rotatably connected to the inner wall of the annular plate through a sealed bearing, and the inner wall is threadedly connected to the outer wall of the threaded rod.

[0009] Preferably, the upper mounting plate and the lower mounting plate are circular plates, and two connecting rods are provided, symmetrically arranged on both sides of the insulating sleeve body.

[0010] Preferably, the brush is made of soft, rounded nylon.

[0011] This utility model provides a cleaning device for transformer insulating bushings. It has a reasonable structural design, is easy to install, has low cost, and is widely applicable. The application of this device can extend the cycle of manual cleaning and solve the problems of difficulty in accurately controlling the force when dealing with accumulated dirt during manual cleaning, which may damage the surface of the bushing. This device assists manual cleaning at regular intervals and has significant technical effects. Attached Figure Description

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a schematic diagram of the appearance of the present utility model; Figure 3 for Figure 1 Structural diagram of the mounting plate and mounting rod; Figure 4 for Figure 1 A schematic diagram of the structure of the insulating sleeve, the rotating plate, and the clamping plate.

[0013] In the diagram: 1. Insulating sleeve; 11. Lower mounting plate; 12. Fixing ring; 13. Mounting ring; 21. Connecting rod; 22. Upper mounting plate; 23. Spherical fan; 24. Mounting rod; 25. Brush; 3. Fixing device; 31. Ring plate; 32. Clamping plate; 33. Threaded rod; 34. Adjusting block. Detailed Implementation

[0014] The present invention will be further explained below with reference to specific implementation schemes, but it is not limited to the present invention.

[0015] The core functions of insulating sleeves are "insulation" (isolating live parts from the grounded outer casing) and "support" (fixing the leads). Contaminants adhering to their surface can directly damage these two functions, with the specific risks as follows: 1. Damages insulation performance and causes flashover faults: Dust, oil, moisture, and salt in the air (especially in outdoor or industrial areas) can adhere to the bushing surface, forming a "conductive film." When the air humidity is high or during rain or snow, the pollutants absorb moisture, causing a significant decrease in the insulation resistance of the bushing surface. This can lead to "surface flashover" (similar to "leakage sparks" under high voltage), and in severe cases, it can break down the bushing, causing a short circuit. 2. Impedes heat dissipation and accelerates bushing aging: Insulating bushings (especially oil-paper insulation or composite insulation types) need to dissipate heat through their surface to maintain normal temperature. If the surface is covered with a thick layer of dust or oil, the heat dissipation efficiency will be significantly reduced, leading to an increase in the internal temperature of the bushing, accelerating the aging of the insulation material (such as rubber cracking and insulating oil deterioration), and shortening its service life. 3. Conceals potential defects and increases maintenance blind spots: Long-term accumulation of pollutants may conceal hidden problems in the bushing itself (such as surface cracks, damage, and oil seepage), preventing maintenance personnel from detecting problems in time, allowing small defects to gradually develop into major faults.

[0016] Existing cleaning methods cannot effectively solve the above problems. Therefore, this invention provides a cleaning device for transformer insulating bushings, such as... Figure 1 and 2 As shown, it includes: upper mounting plate 22, lower mounting plate 11, connecting rod 21, spherical fan 23, mounting rod 24 and brush 25; The upper mounting plate 22 is mounted on the smooth tube body above the "ceramic skirt area" of the insulating sleeve 1 body, and the lower mounting plate 11 is mounted on the smooth tube body below the "ceramic skirt area" of the insulating sleeve 1 body; the upper mounting plate 22 and the lower mounting plate 11 can rotate around the smooth tube body. The two ends of the connecting rod 21 are connected between the upper mounting plate 22 and the lower mounting plate 11, and the connection point is located at the edge of the surface of the upper mounting plate 22 and the lower mounting plate 11, outside the "porcelain skirt area" of the transformer body; Several spherical fans 23 are provided and are evenly distributed and connected to the outer wall of the upper mounting plate 22; The mounting rod 24 body includes connectors at both ends and a "brush carrying area" in the middle. The connectors at both ends are fixed to the upper mounting plate 22 and the lower mounting plate 11, respectively. The "brush carrying area" matches the outer periphery and extension path of the "ceramic skirt" on one side of the insulating sleeve 1 body. The brush 25 is fixedly connected to the "brush carrying area" in the middle of the mounting rod 24 and installed on the side close to the insulating sleeve 1. The brush bristles of the brush 25 are in contact with the outer wall of the "ceramic skirt area" on one side of the insulating tube 1.

[0017] The inner wall of the central mounting hole of the lower mounting plate 11 is rotatably connected to a fixing ring 12 through a sealed bearing. The fixing ring 12 is sleeved on the smooth tube body at the lower part of the "ceramic skirt area" of the insulating sleeve 1 body. The inner wall of the central mounting hole of the upper mounting plate 22 is rotatably connected to the mounting ring 13 via a sealed bearing. The mounting ring 13 is sleeved on the smooth tube body of the upper part of the "ceramic skirt area" of the insulating sleeve 1 body.

[0018] The brushes and connecting components (such as insulating rods and drive shafts) involved in this implementation scheme must meet the insulation requirements of the corresponding voltage level. The insulation resistance must be tested before use (e.g., the insulation resistance of 10kV equipment should not be less than 1000MΩ) to avoid leakage due to insulation failure. For example, the upper mounting plate 22, the lower mounting plate 11, and the connecting rod 21 can be made of phenolic resin board, etc., and the sealed bearings involved can be products with an insulating coating in the prior art.

[0019] Driven by the wind, the spherical fan 23 causes the entire assembly consisting of the upper mounting plate 22, the lower mounting plate 11, and the connecting rod 21 to rotate, and rotates on the outer wall of the "ceramic skirt area" of the insulating tube body 1. The shape of the middle part of the mounting rod 24 is consistent with the shape of the "ceramic skirt area" of the insulating sleeve body. When the overall frame rotates, the mounting rod 24 can drive the brush 25 to rotate on the outer wall of the insulating tube 1. That is, when the spherical fan 23 on the outer wall of the upper mounting plate 22 is blown by the wind, it will drive the mounting rod 24 and the brush 25 to clean the outer wall of the "ceramic skirt area" of the insulating tube 1 very well. This implementation scheme limits the contact between the brush head and the insulating sleeve 1. Since the bending degree of the mounting rod can be set according to the bending angle of the ceramic skirt structure during installation, the device can ensure the contact force between the brush head and the tube body. This avoids the instability of the contact pressure between the brush and the sleeve during manual cleaning, which often causes the sleeve to deform due to excessive friction, such as at the corners of the ceramic skirt structure.

[0020] Furthermore, the single-sided structure of the aforementioned brush 25 means that the area covered by brush 25 in this embodiment does not affect the power grid's regular maintenance operations on electrical equipment. The structure provided in this embodiment can suppress the excessive accumulation of dust and dirt on the surface of the insulating bushing. As long as there is a certain amount of natural wind, the overall frame will rotate, promptly cleaning the surface of the skirts to prevent dust from forming clumps. This structure can gently brush along the direction of the bushing skirts (circular protrusions). It cleans layer by layer, brushing to the bottom surface of each skirt, minimizing the accumulation of dirt on the bushing surface. It has a good removal effect on dry, non-sticky floating dust, extending the cycle of manual cleaning.

[0021] The mounting location of the upper mounting plate 22 is also provided with a reinforcing component. Two sets of the reinforcing components are symmetrically arranged and installed on both sides of the smooth tube body above the "ceramic skirt area" of the insulating sleeve 1 body. like Figure 4 As shown, the reinforcement assembly includes an annular plate 31, a clamping plate 32, a threaded rod 33, and an adjusting block 34. The annular plate 31 is rotatably mounted on the inner wall of the upper mounting plate 22 via a sealed bearing, and the mounting ring 13 is sleeved on the outer wall of the smooth tube body. The annular plate 31 is sleeved on the mounting ring 13, and the annular plate 31 is provided with a threaded hole, which is located above the upper mounting plate 22. The threaded rod 33 passes through the threaded hole and through the annular plate 31. A clamping plate 32 and an adjusting block 34 are respectively located at both ends of the threaded rod 33. The clamping plate 32 abuts against the outer wall of the insulating tube 1. The adjusting block 34 is rotatably connected to the inner wall of the annular plate 31 via a sealed bearing, and its inner wall is threadedly connected to the outer wall of the threaded rod 33. With this structure, when installing the overall cleaning device, aligning the clamping plate 32 with the insulating tube 1 and rotating the adjusting block 34 causes the threaded rod 33 to drive the clamping plate 32 to abut against the outer wall of the insulating tube 1, thus enhancing the stability of the overall structure.

[0022] The upper mounting plate 22 and the lower mounting plate 11 are circular plates. There are two connecting rods 21, which are symmetrically arranged on both sides of the insulating sleeve body. This ensures that the brush 25 is stable when cleaning the insulating tube 1. The circular structure of the upper and lower mounting plates makes the overall structure rotate smoothly when subjected to wind. The connecting rods 21 can ensure the synchronous rotation of the upper and lower mounting plates, further maintaining the stability of the overall device.

[0023] The brush 25 is made of soft, rounded nylon, which is low-cost and will not scratch the enamel (for ceramic sleeves) or silicone rubber layer (for composite sleeves) on the sleeve surface. This structure can prevent scratching the insulating layer on the sleeve surface (such as the enamel of ceramic sleeves and silicone rubber skirts), which would lead to a decrease in insulation performance. In addition, the surface of the insulating sleeve in the prior art is smooth and relatively scratch-resistant. In this embodiment, the brush head is limited to contact with the sleeve surface, which also avoids scratching the surface of the insulating sleeve. The upper mounting plate 22 and the lower mounting plate 11 are set on the insulating tube body, which also reduces the contamination of rainwater, etc. to a certain extent.

[0024] The mounting rod 24 has a buckle structure on the middle part of the rod body. The brush 25 covers the "brush carrying area" in the middle part of the mounting rod 24. The connection between the brush and the rod body can be any method in the existing technology, as long as it is firm and stable. For example, the bundled nylon brush body can be fixed in the metal or plastic buckle, and then the buckle with the bristles can be directly penetrated from one side of the rod body or brush plate and fixed with insulating rivets on the other side.

[0025] This implementation plan utilizes the contact between the spherical fan and the airflow to drive the mounting plate and mounting rod to rotate on the outer wall of the insulating tube, so that the brush can clean the outer wall of the insulating tube. This solves the problem that the cleaning of the insulating bushings of distribution transformers mostly relies on manual periodic cleaning. This method not only consumes a lot of manpower and resources, but also makes it difficult to accurately control the cleaning cycle. During the cleaning interval, the performance of the insulating bushing may still be affected by the accumulation of contaminants.

[0026] The specific embodiments of this utility model are written in a progressive manner, emphasizing the differences between each implementation scheme, and the similar parts can be referred to each other.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A cleaning device for transformer insulating bushings, characterized in that, include: Upper mounting plate (22), lower mounting plate (11), connecting rod (21), spherical fan (23), mounting rod (24) and brush (25); The upper mounting plate (22) is mounted on the smooth tube body above the "ceramic skirt area" of the insulating sleeve (1) body, and the lower mounting plate (11) is mounted on the smooth tube body below the "ceramic skirt area" of the insulating sleeve (1) body; the upper mounting plate (22) and the lower mounting plate (11) can rotate around the smooth tube body; The two ends of the connecting rod (21) are connected between the upper mounting plate (22) and the lower mounting plate (11), and the connection point is located at the edge of the surface of the upper mounting plate (22) and the lower mounting plate (11), outside the "porcelain skirt area" of the transformer body; The spherical fan (23) is provided in several parts, which are evenly distributed and connected to the outer wall of the upper mounting plate (22); The mounting rod (24) body includes connectors at both ends and a "brush carrying area" in the middle. The connectors at both ends are fixed to the upper mounting plate (22) and the lower mounting plate (11) respectively. The "brush carrying area" matches the outer periphery and extension path of the "ceramic skirt" on one side of the insulating sleeve (1) body. The brush (25) is fixedly connected to the "brush carrying area" in the middle of the mounting rod (24) and installed on the side close to the insulating sleeve (1). The brush bristles of the brush (25) are in contact with the outer wall of the "ceramic skirt area" on one side of the insulating sleeve (1).

2. The transformer insulating bushing cleaning device according to claim 1, characterized in that, The inner wall of the central mounting hole of the lower mounting plate (11) is rotatably connected to a fixing ring (12) through a sealed bearing. The fixing ring (12) is sleeved on the smooth tube body at the lower part of the "ceramic skirt area" of the insulating sleeve (1) body. The inner wall of the central mounting hole of the upper mounting plate (22) is rotatably connected to a mounting ring (13) via a sealed bearing. The mounting ring (13) is sleeved on the smooth tube body above the "ceramic skirt area" of the insulating sleeve (1) body.

3. The transformer insulating bushing cleaning device according to claim 2, characterized in that, The mounting location of the upper mounting plate (22) is also provided with a reinforcing component. Two sets of the reinforcing components are symmetrically arranged and installed on both sides of the smooth tube body above the "ceramic skirt area" of the insulating sleeve (1) body. The reinforcement assembly includes an annular plate (31), a clamping plate (32), a threaded rod (33), and an adjusting block (34). The annular plate (31) is rotatably mounted on the inner wall of the upper mounting plate (22) via a sealed bearing, and the mounting ring (13) is sleeved on the outer wall of the smooth tube. The annular plate (31) is sleeved on the mounting ring (13), and the annular plate (31) is provided with a threaded hole, which is located above the upper mounting plate (22). The threaded rod (33) passes through the threaded hole and through the annular plate (31). The clamping plate (32) and the adjusting block (34) are respectively located at both ends of the threaded rod (33). The clamping plate (32) abuts against the outer wall of the insulating sleeve (1). The adjusting block (34) is rotatably connected to the inner wall of the annular plate (31) through a sealed bearing, and the inner wall is threadedly connected to the outer wall of the threaded rod (33).

4. The transformer insulating bushing cleaning device according to claim 1, characterized in that, The upper mounting plate (22) and the lower mounting plate (11) are circular plates. There are two connecting rods (21), which are symmetrically arranged on both sides of the insulating sleeve body.

5. The transformer insulating bushing cleaning device according to claim 1, characterized in that, The brush (25) is made of soft, rounded nylon.

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