An oil-immersed transformer protective cover

Abstract

This utility model discloses an oil-immersed transformer protective cover, relating to the technical field of transformer accessories. The utility model includes a protective cover body, a cover connected to the top of the protective cover body, a partition connected to the top of the cover, a reflector connected to the top of the partition, dustproof netting connected around the partition, and protective plates connected to both sides of the dustproof netting. A sealing ring connects the protective plates and the reflector. This utility model, through the setting of the reflector, with a diffuse reflection coating on the top of the reflector, can diffusely reflect most of the direct sunlight, reducing the impact of sunlight on the internal temperature of the protective cover body. Furthermore, because it is a diffuse reflection coating rather than a high-reflectivity material or coating, it reduces concentrated glare, thereby reducing glare interference to the surrounding area; and by diffusely reflecting most of the sunlight, it reduces the internal temperature rise of the protective cover body.

Description

Technical Field

[0001] This utility model relates to the field of transformer accessories technology, specifically an oil-immersed transformer protective cover. Background Technology

[0002] Oil-immersed transformers are a new type of high-performance transformer with a more rational structure and superior performance. Their three-dimensional wound core, with its three core columns arranged in an equilateral triangle, has no air gaps in its magnetic circuit, resulting in tighter winding. The three magnetic circuits are of equal and shortest lengths, and the cross-sectional area of ​​the core columns is closer to a circle. Therefore, performance is further improved, losses are reduced, noise is reduced, three-phase balance is achieved, and the third harmonic component is reduced. This product is more suitable for power grid upgrades in urban and rural areas and industrial and mining enterprises, and is also more suitable for combined transformers and prefabricated substation transformers.

[0003] When transformers are assembled outdoors, protective covers are usually installed on the high-voltage or low-voltage side to prevent short circuits caused by foreign objects, electric shocks caused by personnel contact, theft of electricity due to unauthorized cable connections, and to protect against rain, moisture, and dust. These protective covers are made of materials such as silicone rubber, plastic, metal, and composite materials. According to their structure, they can be divided into integral covers and split covers. Integral covers refer to covering and protecting all terminals on the high-voltage or low-voltage side together, while split covers have multiple units, each covering and protecting each terminal on the high-voltage or low-voltage side individually.

[0004] When using existing oil-immersed transformer protective covers, especially in summer outdoor use, the strong sunlight and high temperature can cause heat to accumulate inside the protective cover after prolonged exposure. Traditional protective covers usually rely on natural heat dissipation, which is ineffective in high summer temperatures. This results in a lot of heat accumulation at the terminals, which can accelerate the aging of the terminals and pose a certain fire hazard. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide an oil-immersed transformer protective cover to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an oil-immersed transformer protective cover, comprising a protective cover body, a cover connected to the top of the protective cover body, a partition connected to the top of the cover, a reflector connected to the top of the partition, dustproof nets connected around the partition, and protective plates connected to both sides of the dustproof nets, with a sealing ring connecting the protective plates and the reflector.

[0007] By adopting the above technical solution, when operating in summer, a diffuse reflection coating is provided on the top of the reflector, which can diffuse most of the direct sunlight, reducing the impact of sunlight on the internal temperature of the protective cover body; and because it is a diffuse reflection coating rather than a high-reflectivity material or coating, it reduces concentrated glare, thereby reducing the glare interference on the surrounding area; at the same time, the reflector is sealed by the protective plate and the sealing ring, avoiding oxidation and aging of the reflector caused by external moisture and other factors; and the protective plate is made of transparent PC material modified by nano-silica and anti-ultraviolet agent. The nano-silica has a small particle size, reducing the impact on the light transmittance of the transparent PC. At the same time, nano-silica can increase the surface wear resistance of the protective plate, reducing the wear of the protective plate surface caused by external wind, sun and rain, so that the protective plate can ensure the light transmittance for a longer time and extend the service life of the protective plate; and the modification with anti-ultraviolet agent not only increases the weather resistance of the protective plate, but also can reduce the irradiation of ultraviolet rays on the reflector, indirectly increasing the weather resistance of the reflector; and although most of the sunlight is diffusely reflected by the reflector, there is still some sunlight that is not reflected. The "艹"-shaped groove at the bottom of the shelf forms an air duct, enabling the external air flow to pass through the bottom of the shelf, reducing the accumulation of heat under the reflector, and at the same time, the dust-proof net reduces the occurrence of blockage caused by impurity entry.

[0008] Further, a hinge is connected between the cover body and the protective cover body, and the cover body is rotationally connected to the protective cover body through the hinge.

[0009] By adopting the above technical solution, after assembly, the staff closes the cover body to prevent others from opening it and stealing electricity or getting an electric shock.

[0010] Further, a groove is provided at the bottom of the shelf, and the cross-section of the groove is in the shape of "艹".

[0011] By adopting the above technical solution, although most of the sunlight is diffusely reflected by the reflector, there is still some sunlight that is not reflected. The "艹"-shaped groove at the bottom of the shelf forms an air duct, enabling the external air flow to pass through the bottom of the shelf, reducing the accumulation of heat under the reflector, and at the same time, the dust-proof net reduces the occurrence of blockage caused by impurity entry.

[0012] Further, a diffuse reflection coating is provided on the top of the reflector.

[0013] By adopting the above technical solution, when operating in summer, a diffuse reflection coating is provided on the top of the reflector, which can diffuse most of the direct sunlight, reducing the impact of sunlight on the internal temperature of the protective cover body; and because it is a diffuse reflection coating rather than a high-reflectivity material or coating, it reduces concentrated glare, thereby reducing the glare interference on the surrounding area.

[0014] Furthermore, the protective plate is made of transparent PC material modified with nano-silica and UV stabilizers, and the sealing ring is made of EPDM rubber.

[0015] By adopting the above technical solutions, and using a protective plate and sealing ring to seal the reflector, oxidation and aging of the reflector caused by external moisture and other factors are prevented. The small particle size of nano-silica reduces its impact on the light transmittance of transparent PC. At the same time, nano-silica can increase the wear resistance of the protective plate surface and reduce the wear of the protective plate surface caused by external wind and sun exposure, thereby enabling the protective plate to maintain its light transmittance for a longer period of time and extending its service life. The modification with anti-ultraviolet agents not only increases the weather resistance of the protective plate, but also reduces the exposure of the reflector to ultraviolet rays, indirectly increasing the weather resistance of the reflector.

[0016] Furthermore, the partition is made of non-transparent PC material modified with UV stabilizers.

[0017] By adopting the above technical solution, the partition is made of non-transparent PC material, which can block sunlight from shining on the transformer protective cover. The partition is modified with anti-ultraviolet agent to increase weather resistance, making it suitable for long-term outdoor use.

[0018] Furthermore, mounting plates are fixed on both sides of the protective cover body and the cover, and a through hole is opened on the top of the mounting plate. A sealing plate is connected inside the protective cover body.

[0019] By adopting the above technical solution, the workers pass the cable through the sealing plate. The sealing plate itself elastically fits the cable to fill the gaps and reduce the entry of moisture. Finally, the workers install the terminal at the end of the cable on the low-voltage side of the oil-immersed transformer. After the assembly is completed, the workers close the cover and then install lead seals and locks on the mounting plate to prevent others from opening it to steal electricity and to prevent electric shock.

[0020] Furthermore, the protective plate and dustproof net are detachably connected to the partition by bolts, and the partition is detachably connected to the cover by bolts.

[0021] By adopting the above technical solution, when the structure needs to be replaced or cleaned, the staff can remove the bolts to disassemble and clean the dust screen, and can also remove and replace the partition, dust screen and protective plate. At the same time as the protective plate is removed, the staff can directly replace the reflector and sealing ring.

[0022] Furthermore, a clamping plate is connected to the lower interior of the protective cover body via self-tapping bolts, and clamping bolts penetrate both sides of the clamping plate.

[0023] By adopting the above technical solution, the existence of the clamping bolts makes the two clamping plates rigidly connected. External forces can be distributed to the two clamping plates through the clamping bolts, and then from the two clamping plates to the four self-tapping bolts, thereby increasing the structural stability.

[0024] Furthermore, two sets of the clamping plates, self-tapping bolts and clamping bolts are provided, and two clamping plates form a set. The two clamping plates in each set are arranged in a mirror image.

[0025] By adopting the above technical solution, the staff clamp the bottoms of the two outermost terminals respectively through the two sets of clamping plates, that is, the lower area outside the insulator. Then, the staff make the two clamping plates close and clamp through the clamping bolts, thereby preventing the clamping plates from separating from the insulator.

[0026] In summary, the main beneficial effects of the present utility model are as follows:

[0027] 1. Through the setting of the reflector in the present utility model, a diffuse reflection coating is provided on the top of the reflector, which can diffusely reflect most of the direct sunlight, reduce the influence of sunlight on the temperature inside the main body of the protective cover, and since it is a diffuse reflection coating rather than a high-reflectivity material or coating, it reduces concentrated glare, thereby reducing the glare interference generated on the periphery; by diffusely reflecting most of the sunlight, the temperature rise inside the main body of the protective cover is reduced;

[0028] 2. Through the setting of the protective plate and the sealing ring in the present utility model, the reflector is sealed by the cooperation of the protective plate and the sealing ring to prevent oxidation and aging of the reflector caused by external moisture and other factors. The protective plate is made of a transparent PC material modified by nano-silica and an ultraviolet absorber. The small particle size of nano-silica reduces the influence on the light transmittance of the transparent PC, and at the same time, nano-silica can increase the surface wear resistance of the protective plate, reduce the wear of the surface of the protective plate caused by external wind, sun and rain, so that the protective plate can ensure the light transmittance for a longer time and extend the service life of the protective plate. The modification by the ultraviolet absorber not only increases the weather resistance of the protective plate, but also reduces the irradiation of ultraviolet rays on the reflector, indirectly increasing the weather resistance of the reflector; it is convenient to protect the reflector and thus extend the service life of the reflector;

[0029] 3. Through the setting of the partition frame and the dust-proof net in the present utility model, although most of the sunlight is diffusely reflected by the reflector, there is still some sunlight that is not reflected. The "艹"-shaped groove at the bottom of the partition frame forms an air duct, enabling the external air flow to pass through the bottom of the partition frame, reducing the accumulation of heat below the reflector. At the same time, the dust-proof net reduces the entry of impurities and prevents blockage; further increasing the thermal protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the present utility model when it is closed;

[0031] Figure 2This is a schematic diagram of the structure of this utility model when it is opened;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of the cover of this utility model;

[0033] Figure 4 This is a schematic diagram of the exploded structure of the cover of this utility model;

[0034] Figure 5 This is a schematic diagram of the exploded structure of the partition of this utility model.

[0035] In the diagram: 1. Main body of the protective cover; 2. Mounting plate; 3. Sealing plate; 4. Clamping plate; 5. Self-tapping screw; 6. Clamping bolt; 7. Cover; 8. Frame; 9. Dustproof net; 10. Reflector; 11. Protective plate; 12. Sealing ring. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The embodiments of this utility model will be described below based on its overall structure.

[0038] Example 1:

[0039] An oil-immersed transformer protective cover, such as Figures 1-5As shown in the figure, it includes a protective cover body 1. A cover body 7 is connected to the top of the protective cover body 1. A hinge is connected between the cover body 7 and the protective cover body 1. The cover body 7 is rotationally connected to the protective cover body 1 through the hinge. A partition rack 8 is connected to the top of the cover body 7. A groove is provided at the bottom of the partition rack 8. The cross-section of the groove is in the shape of "艹". The partition rack 8 is made of non-transparent PC material modified with an anti-ultraviolet agent. A reflecting plate 10 is connected to the top of the partition rack 8. A diffuse reflection coating is provided on the top of the reflecting plate 10. Dust-proof nets 9 are connected to all four sides of the partition rack 8. Protective plates 11 are connected to both sides of the dust-proof nets 9. The protective plates 11 are made of transparent PC material modified with nano-silica and an anti-ultraviolet agent. A sealing ring 12 is connected between the protective plates 11 and the reflecting plate 10. The sealing ring 12 is made of ethylene propylene diene monomer. When operating in summer, a diffuse reflection coating is provided on the top of the reflecting plate 10, which can diffuse-reflect most of the direct sunlight, reducing the influence of sunlight on the internal temperature of the protective cover body 1. And because it is a diffuse reflection coating rather than a high-reflectivity material or coating, it reduces concentrated glare, thus reducing the glare interference on the surrounding area. At the same time, the reflecting plate 10 is sealed by the cooperation of the protective plates 11 and the sealing ring 12, avoiding oxidation and aging of the reflecting plate 10 caused by external moisture and other factors. And the protective plates 11 are made of transparent PC material modified with nano-silica and an anti-ultraviolet agent. The small particle size of nano-silica reduces the influence on the light transmittance of transparent PC. At the same time, nano-silica can increase the surface wear resistance of the protective plates 11, reducing the wear of the surface of the protective plates 11 caused by external wind, sun and rain, so that the protective plates 11 can ensure the light transmittance for a longer time and extend the service life of the protective plates 11. The modification with an anti-ultraviolet agent not only increases the weather resistance of the protective plates 11, but also can reduce the irradiation of ultraviolet rays on the reflecting plate 10, indirectly increasing the weather resistance of the reflecting plate 10. And although most of the sunlight is diffuse-reflected by the reflecting plate 10, there is still some sunlight that is not reflected. The "艹"-shaped groove at the bottom of the partition rack 8 forms an air duct, enabling the outside air flow to pass through the bottom of the partition rack 8, reducing the accumulation of heat below the reflecting plate 10. At the same time, the dust-proof nets 9 reduce the occurrence of blockage caused by the entry of impurities.

[0040] Refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 , in the above-mentioned embodiment, mounting plates 2 are fixed on both sides of the protective cover body 1 and the cover body 7. Through holes are opened at the top of the mounting plates 2. A sealing plate 3 is connected inside the protective cover body 1. After assembly, the staff closes the cover body 7, and then the staff installs lead seals and locks on the mounting plates 2 to prevent others from opening and stealing electricity and getting an electric shock.

[0041] Embodiment 2:

[0042] On the basis of the above-mentioned Embodiment 1, for the convenience of replacing damaged structures, the following settings are now made.

[0043] See Figures 1-5 In the above embodiment, the protective plate 11 and the dustproof net 9 are detachably connected to the partition 8 by bolts, and the partition 8 is detachably connected to the cover 7 by bolts. When the structure needs to be replaced or cleaned, the staff can remove the bolts to disassemble and clean the dustproof net 9, or remove the partition 8, the dustproof net 9 and the protective plate 11 for replacement. When the protective plate 11 is removed, the staff can directly replace the reflector 10 and the sealing ring 12.

[0044] Example 3:

[0045] Based on the above embodiment 1, in order to increase the stability of the clamping plate 4, the following settings are now implemented.

[0046] See Figure 2 In the above embodiment, a clamping plate 4 is connected to the lower part of the inner side of the protective cover body 1 by self-tapping bolts 5. Clamping bolts 6 pass through both sides of the clamping plate 4. There are two sets of clamping plates 4, self-tapping bolts 5 and clamping bolts 6. Two clamping plates 4 form a set, and the two clamping plates 4 in each set are mirror images of each other. The presence of clamping bolts 6 makes the two clamping plates 4 rigidly connected. External forces can be distributed to the two clamping plates 4 through clamping bolts 6, and then distributed to the four self-tapping bolts 5 by the two clamping plates 4, thereby increasing structural stability.

[0047] The implementation principle of this utility model is as follows: First, the worker places the protective cover body 1 onto the low-voltage side of the oil-immersed transformer from top to bottom. Then, the worker uses two sets of clamping plates 4 to clamp the bottom of the two outermost terminals, i.e., the lower outer area of ​​the insulator. Next, the worker uses clamping bolts 6 to bring the two clamping plates 4 closer together and tighten them, thus preventing the clamping plates 4 from separating from the insulator. Finally, the worker uses self-tapping bolts 5 to fasten the clamping plates 4 to the protective cover body 1 together, thus preventing the protective cover body 1 from falling off the low-voltage side of the oil-immersed transformer. The presence of clamping bolts 6 ensures... The two clamping plates 4 are rigidly connected, and external forces can be distributed to the two clamping plates 4 through the clamping bolts 6, and then distributed to the four self-tapping bolts 5 by the two clamping plates 4, thereby increasing structural stability. Then, the workers pass the cable through the sealing plate 3. The sealing plate 3 itself elastically fits the cable to fill the gaps and reduce the entry of moisture. Finally, the workers install the terminal at the end of the cable on the low-voltage side of the oil-immersed transformer. After assembly, the workers close the cover 7, and then install lead seals and locks on the mounting plate 2 to prevent others from opening it to steal electricity and to prevent electric shock.

[0048] During summer operation, the top of the reflector 10 is equipped with a diffuse reflection coating, which diffuses most of the direct sunlight, reducing the impact of sunlight on the internal temperature of the protective cover body 1. Furthermore, because it is a diffuse reflection coating rather than a high-reflectivity material or coating, it reduces concentrated glare, thereby minimizing glare interference to the surrounding environment. Simultaneously, the reflector 10 is sealed by the protective plate 11 and the sealing ring 12, preventing oxidation and aging of the reflector 10 due to external moisture and other factors. The protective plate 11 is made of transparent PC material modified with nano-silica and UV inhibitors. The small particle size of the nano-silica reduces its impact on the light transmittance of the transparent PC, while the nano-silica can... The surface wear resistance of the protective plate 11 is increased, reducing the wear caused by wind and sun exposure, thus enabling the protective plate 11 to maintain its light transmittance for a longer period and extending its service life. The modification with anti-ultraviolet agent not only increases the weather resistance of the protective plate 11, but also reduces the exposure of ultraviolet rays to the reflector plate 10, indirectly increasing the weather resistance of the reflector plate 10. Although most of the sunlight is diffusely reflected by the reflector plate 10, some sunlight is still not reflected. The T-shaped groove at the bottom of the partition 8 forms an air duct, allowing external airflow to pass through the bottom of the partition 8, reducing the accumulation of heat under the reflector plate 10. At the same time, the dustproof net 9 reduces the entry of impurities and prevents blockage.

[0049] When the structure needs to be replaced or cleaned, the staff can remove the bolts to disassemble and clean the dust screen 9, or remove the partition 8, dust screen 9 and protective plate 11 for replacement. While removing the protective plate 11, the staff can directly replace the reflector 10 and the sealing ring 12.

[0050] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An oil-immersed transformer protective cover, comprising a protective cover body (1), characterized in that: A cover body (7) is connected to the top of the protective cover main body (1), and a partition frame (8) is connected to the top of the cover body (7). A reflector (10) is connected to the top of the partition frame (8). Dust-proof nets (9) are connected to the four sides of the partition frame (8), and protective plates (11) are connected to both sides of the dust-proof nets (9). A sealing ring (12) is connected between the protective plate (11) and the reflector (10).

2. The protective cover for an oil-immersed transformer according to claim 1, characterized in that: A hinge is connected between the cover body (7) and the protective cover main body (1), and the cover body (7) is rotatably connected to the protective cover main body (1) through the hinge.

3. The protective cover for an oil-immersed transformer according to claim 1, characterized in that: A groove is provided at the bottom of the partition frame (8), and the cross-section of the groove is in the shape of "艹".

4. The protective cover for an oil-immersed transformer according to claim 1, characterized in that: A diffuse reflection coating is provided on the top of the reflector (10).

5. The protective cover for an oil-immersed transformer according to claim 1, characterized in that: The protective plate (11) is made of a transparent PC material modified by nano-silica and an anti-ultraviolet agent, and the sealing ring (12) is made of ethylene propylene diene monomer rubber.

6. The protective cover for an oil-immersed transformer according to claim 3, characterized in that: The partition frame (8) is made of a non-transparent PC material modified by an anti-ultraviolet agent.

7. The protective cover for an oil-immersed transformer according to claim 1, characterized in that: Mounting plates (2) are fixed to both sides of the protective cover main body (1) and the cover body (7), and through holes are provided at the tops of the mounting plates (2). A sealing plate (3) is connected inside the protective cover main body (1).

8. The protective cover for an oil-immersed transformer according to claim 6, characterized in that: The protective plate (11) and the dust-proof net (9) are detachably connected to the partition frame (8) by bolts, and the partition frame (8) is detachably connected to the cover body (7) by bolts.

9. The protective cover for an oil-immersed transformer according to claim 7, characterized in that: A clamping plate (4) is connected to the lower part inside the protective cover main body (1) by self-tapping bolts (5), and clamping bolts (6) penetrate through both sides of the clamping plate (4).

10. The protective cover for an oil-immersed transformer according to claim 9, characterized in that: Two sets of the clamping plate (4), the self-tapping bolts (5) and the clamping bolts (6) are provided, and two clamping plates (4) form a group. The two clamping plates (4) in each group are arranged mirror-symmetrically.

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