A transformer oil tank auxiliary polishing device

Abstract

The application relates to the technical field of transformer oil tank surface treatment, in particular to a transformer oil tank auxiliary polishing device, which comprises a transformer oil tank mechanism, a transformer oil tank, a heat dissipation part arranged on the transformer oil tank, a sliding mechanism, two groups of rotating parts, a polishing part and an adjusting part. The direct dragging sliding mechanism drives the polishing mechanism to move, so that the crevice between the heat dissipation fins can be polished, the operation is convenient, a certain amount of labor is saved, the polishing part is tightly contacted with the heat dissipation fins by rotating the handle part, and the polishing effect of the device is improved.

Description

Technical Field

[0001] This invention relates to the technical field of transformer oil tank surface treatment, and in particular to an auxiliary grinding device for transformer oil tanks. Background Technology

[0002] The transformer oil tank is the outer shell of the transformer, which protects the transformer body from interference from the external environment. The tank is filled with transformer oil, which serves to provide insulation and heat dissipation.

[0003] In the surface treatment process of transformer oil tanks, grinding usually occurs before powder coating. After welding, the oil tank undergoes overall grinding to remove surface oil, rust, welding slag, etc., thereby improving the adhesion of the paint film. The surface of transformer oil tanks is mostly ground by a polishing machine. However, the gaps between the heat sink fins on the transformer oil tank are difficult for the polishing machine to insert for grinding. Currently, most of the grinding is done by workers using polishing paper, which is more troublesome and wastes a lot of labor. Summary of the Invention

[0004] In view of the problems existing in the current transformer tank surface treatment process and auxiliary grinding device, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide an auxiliary grinding device for transformer oil tanks, which facilitates grinding the gaps between the heat sink fins on the transformer oil tank.

[0006] To solve the above technical problems, the present invention provides a surface treatment process for transformer oil tanks, including,

[0007] The process involves electrophoresis followed by powder coating.

[0008] The process of electrophoresis followed by powder coating includes: pre-degreasing → degreasing → first water wash → surface conditioning → phosphating → second water wash → platform draining → electrophoresis → ultrafiltrate cleaning → pure water washing → platform draining → drying → powder coating.

[0009] This invention provides an auxiliary grinding device for transformer oil tanks, comprising:

[0010] A transformer oil tank mechanism includes a transformer oil tank and a heat dissipation section disposed on the transformer oil tank;

[0011] The sliding mechanism includes a sliding part disposed on the heat dissipation part, a lifting part disposed on the sliding part, and a power part disposed on the lifting part;

[0012] The polishing mechanism includes an output rod disposed on the power unit, two sets of rotating parts disposed on the output rod, a polishing part disposed on the rotating parts, an adjusting part disposed on the polishing part, a handle disposed on the output rod, and a linkage part disposed on the handle and connected to the adjusting part.

[0013] In a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the heat dissipation part includes heat dissipation fins disposed on the transformer tank and reinforcing ribs disposed on the heat dissipation fins.

[0014] As a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the sliding part includes a sliding block disposed on the heat sink, four sliding blocks are provided, a sliding groove disposed on the sliding block and adapted to the heat sink, and an arc-shaped extrusion surface disposed on the sliding block.

[0015] In a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the lifting part includes a lifting guide rod disposed on the sliding block, a lifting spring disposed on the lifting guide rod, and a push handle disposed on the lifting guide rod.

[0016] In a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the power unit includes a bracket mounted on the lifting guide rod and a power motor mounted on the bracket and connected to the output rod.

[0017] In a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the rotating part includes a rotating frame disposed on the output rod and a rotating telescopic groove disposed on the rotating frame. The rotating telescopic groove is provided in a plurality of places and is distributed in a ring on the top of the rotating frame.

[0018] As a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the grinding part includes a grinding telescopic rod disposed on the rotating telescopic groove, a grinding linkage block disposed on the grinding telescopic rod, and a grinding disc disposed on the grinding telescopic rod.

[0019] As a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the adjusting part includes an adjusting plate disposed on the rotating frame and connected to the output rod, and an adjusting linkage groove disposed on the adjusting plate and adapted to the grinding linkage block. The adjusting linkage groove is provided in a plurality of places and is distributed in a ring on the adjusting plate.

[0020] As a preferred embodiment of the transformer tank auxiliary grinding device of the present invention, the handle includes a rotating handle disposed on the output rod, an internal thread disposed in the rotating handle, a spline groove disposed on the rotating handle, and an external thread disposed on the output rod and adapted to the internal thread.

[0021] The linkage unit includes a linkage tube disposed on the rotating handle and connected to the adjusting plate, and a linkage spline disposed inside the linkage tube and adapted to the spline groove.

[0022] The beneficial effects of the present invention are as follows: by directly dragging the sliding mechanism to drive the grinding mechanism to move, the gaps between the heat sinks can be ground. The operation is convenient and saves a certain amount of labor. Rotating the handle makes the grinding part come into close contact with the heat sink, which increases the grinding effect of the device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the grinding disc of the present invention.

[0026] Figure 3 This is a schematic diagram of the sliding part of the present invention.

[0027] Figure 4 For the present invention Figure 3 A magnified view of a portion of point A in the middle.

[0028] Figure 5 This is a schematic diagram of the structure of the adjustment part of the present invention.

[0029] Figure 6 This is a schematic diagram of the grinding part of the present invention.

[0030] Figure 7 For the present invention Figure 6 A magnified view of a portion of point B in the middle.

[0031] Figure 8 This is a schematic diagram of the handle of the present invention. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0036] Example 1

[0037] As a first embodiment of the present invention, a surface treatment process for a transformer tank is provided, including:

[0038] The process involves electrophoresis followed by powder coating.

[0039] The process of electrophoresis followed by powder coating includes: pre-degreasing → degreasing → first water wash → surface conditioning → phosphating → second water wash → platform draining → electrophoresis → ultrafiltrate cleaning → pure water washing → platform draining → drying → powder coating.

[0040] Furthermore, in the prior art, hot-dip galvanizing is a commonly used anti-corrosion method. The present invention adopts electrophoretic coating, which can provide a more uniform coating, enhance adhesion and anti-corrosion ability. The uniformity of electrophoretic coating reduces the problem of inconsistent coating thickness, which may reduce the risk of corrosion due to uneven coating. At the same time, a uniform coating helps to improve the heat transfer efficiency of the oil tank because the coating thickness is consistent and the heat distribution is more uniform.

[0041] The pretreatment process for electrophoresis includes:

[0042] Step 1: Pre-degreasing. Use a degreasing agent to clean the oil stains on the surface of the fuel tank, preparing it for the subsequent degreasing process. Pre-degreasing is mainly used to remove oil stains from the inner and outer surfaces of the fuel tank. Oil stains not only hinder the formation of the phosphating film, but also affect the adhesion and corrosion resistance of the coating. Pre-degreasing can initially clean the metal surface, preparing it for the subsequent degreasing process.

[0043] Step 2: Degreasing. A degreasing agent is used to further remove various greases and contaminants from the surface of the fuel tank on the basis of pre-degreasing, ensuring that the surface of the fuel tank is clean and oil-free. The degreasing process utilizes the saponification reaction of alkali on greases to convert saponifiable greases into soluble soaps and glycerin. At the same time, emulsification or dissolution is used to remove unsaponifiable greases, ensuring that the metal surface is clean and oil-free.

[0044] Step 3: One water rinse to remove residual degreasing agent and keep the oil tank clean and uncontaminated. The water rinse is mainly used to remove residual alkali and other contaminants from the degreasing process. Two water rinses can more thoroughly clean the metal surface, providing a clean substrate for the subsequent surface conditioning and phosphating processes. The first water rinse mainly removes most of the residue, while the second water rinse further ensures the cleanliness of the surface.

[0045] Step 4: Surface conditioning, forming a layer of crystal nuclei on the surface of the fuel tank to improve the subsequent phosphating speed; Surface conditioning is a special treatment performed on the metal surface that needs to be phosphated before phosphating. Surface conditioning changes the micro-state of the metal surface, eliminates the surface roughening effect, and improves the uniformity of surface activity, thereby accelerating the phosphating process and promoting the formation of a fine, uniform, and dense phosphating salt film during phosphating. This is crucial for improving the quality of the phosphating film and the adhesion of the coating.

[0046] Step 5: Phosphating, used as a primer before painting, improves the adhesion and corrosion resistance of the paint film. Phosphating is a process of chemical and electrochemical reaction to form a phosphate chemical conversion film. The main function of the phosphate film is to protect the base metal and prevent it from corroding. At the same time, the phosphate film can also serve as a primer before painting, improving the adhesion and corrosion resistance of the paint film. Under appropriate conditions, phosphating can form a dense phosphate film, significantly improving the corrosion resistance and adhesion of the coating.

[0047] Step Six: Secondary water wash, used to remove residual phosphating solution and other contaminants from the phosphating process, providing a good foundation for subsequent coating processes; the water wash after phosphating has a similar function to the water wash after degreasing, mainly used to remove residual phosphating solution and other contaminants from the phosphating process. Through thorough cleaning, it can be ensured that the surface of the phosphating film is clean and free of impurities, providing a good foundation for subsequent coating processes.

[0048] Step 7: Platform draining, used to remove residual moisture from the surface of the fuel tank, providing a dry base for the subsequent coating process. Platform draining is a step performed after pure water washing, mainly used to remove residual moisture from the metal surface. Through the draining process, it can be ensured that the metal surface is dry and water-free, providing a dry base for the subsequent coating process. A dry surface is conducive to the adhesion and curing of the paint, thereby improving the overall quality of the coating.

[0049] One water wash, with no less than two washes; the two water washes can more thoroughly clean the metal surface, providing a clean substrate for the subsequent surface conditioning and phosphating processes. The first water wash mainly removes most of the residue, while the second water wash further ensures the cleanliness of the surface.

[0050] The secondary water wash includes no less than two water washes and one pure water wash. The quality of the pure water must be strictly controlled, with a conductivity of <5μs / cm. Among them, the pure water wash is a very important step in the pretreatment of coating and painting. It is mainly used to remove trace impurities and moisture remaining on the metal surface, ensuring that the surface cleanliness reaches the highest standard. The pure water wash can improve the adhesion, corrosion resistance and service life of the coating. At the same time, the pure water wash can also reduce defects such as bubbles and pinholes generated during the coating process.

[0051] Furthermore, controlling the conductivity of pure water to <5μs / cm has the following effects: 1. Preventing ion interference: Conductivity is an important indicator for measuring the content of dissolved ions in water. When the conductivity is low, it indicates that the content of dissolved ions in the water is low, which can reduce the interference of these ions on the electrophoresis process, ensuring the stability of the electrophoresis process and the quality of the coating film. If the conductivity is too high, impurity ions may be carried into the electrophoresis tank, which will have a significant impact on the quality of the electrophoretic coating and the stability of the tank solution, leading to problems such as coating defects; 2. Extending equipment life: Using pure water with low conductivity for cleaning can also reduce corrosion and blockage of electrophoresis equipment and pipelines, extend the service life of the equipment, and reduce maintenance costs.

[0052] Electrophoresis, using cathodic electrophoretic coating, with the oil tank as the cathode, and the electrophoretic coating used is cationic (positively charged); electrophoretic coating is a coating method that uses an electric field to deposit coating particles onto a metal surface. Electrophoretic coatings have excellent corrosion resistance, wear resistance, and decorative properties. During the electrophoresis process, coating particles move directionally under the action of an electric field and are deposited on the metal surface to form a uniform coating. Electrophoretic coatings can significantly improve the adhesion of the coating.

[0053] The thickness of the electrophoretic paint film is 18-25μm. Electrophoretic paint is a coating technology that uses an electric field to uniformly distribute paint particles on the surface of a workpiece to form a coating. Because the particle size of the paint is relatively small, the coating thickness of electrophoretic paint is relatively thin. However, this thickness range is crucial to ensuring the quality of the coating. A paint film thickness of 18-25μm can provide good corrosion resistance, wear resistance and resistance to impact from foreign objects, while ensuring the uniformity and aesthetics of the coating.

[0054] Furthermore, if the electrophoretic coating thickness is less than 18µm, the following issues may occur: Decreased corrosion resistance: An excessively thin coating directly affects the coating's corrosion resistance, making the workpiece more susceptible to corrosion. Appearance problems: An excessively thin coating may result in insufficient hiding power, leading to issues such as showing through the substrate, yellowing, shriveling, and low gloss, affecting the product's aesthetics. Performance degradation: In addition to corrosion resistance, the coating's abrasion resistance and resistance to impacts may also significantly decrease due to insufficient thickness, thus affecting the product's lifespan.

[0055] Furthermore, if the electrophoretic coating film thickness exceeds 25µm, the following issues may occur: cracking and peeling: excessively thick coatings may increase internal stress, making cracking and peeling more likely, affecting the integrity and protective effect of the coating; wasting resources: excessively thick coatings mean more paint is used, increasing production costs and waste; affecting coating effect: excessively thick coatings may also affect the uniformity and consistency of the coating, leading to problems such as color difference and thickness difference on the coating surface, affecting the overall quality of the product.

[0056] Therefore, setting the metal electrophoretic coating film thickness to 18-25μm is based on a comprehensive consideration of coating quality, cost-effectiveness, and coating effect. In practical applications, the electrophoretic coating process parameters should be strictly controlled to ensure that the film thickness is within a reasonable range, so as to ensure that the coating quality and performance meet the standard requirements.

[0057] Post-electrophoresis processing steps include:

[0058] Step 1: Ultrafiltration circulating water washing rinses off the electrophoretic paint adhering to the surface, while simultaneously filtering out impurities generated during the electrophoresis process through an ultrafiltration device, thus achieving the purpose of recovering the electrophoretic solution.

[0059] Step 2: Pure water wash, used to remove residual liquid and other contaminants from the ultrafiltration circulating water wash process, providing a good foundation for the subsequent coating process.

[0060] Step 3: Platform draining, used to remove residual moisture from the surface of the oil tank, providing a dry base for the subsequent painting process.

[0061] Step 4: Drying. Slowly increase the temperature to prevent uneven heating that could cause cracking or peeling. The drying temperature depends on the characteristics of the selected paint.

[0062] The powder coating process includes:

[0063] Step 1: Primer spraying, using zinc-rich primer powder in two coats.

[0064] Step 2: Topcoat spraying, using acrylic polyurethane topcoat in two coats.

[0065] Furthermore, applying both the primer and topcoat in two coats has the following effects: 1. Enhanced adhesion: The adhesion between the powder coating and the metal substrate is a crucial indicator of coating performance. Applying the coating in two coats allows for initial adhesion after the first coat, and the second coat further enhances adhesion. This is because the second coat can fill any micropores or defects that may have been left by the first coat, creating a denser coating structure and thus improving adhesion. 2. Improved coating uniformity: Applying the coating in two coats allows for better control over the thickness and uniformity of each coat. A single coat, being thicker, is prone to uneven coating. 1. Reduces defects such as sagging and dripping. Two coats, each thinner, achieve more even coverage and reduce defects. 2. Improves coating appearance: The appearance quality of powder coating is a key concern for users. Two coats make the coating surface smoother and more delicate, reducing defects such as orange peel and pinholes, and improving the overall aesthetics of the product. 3. Improves coating performance: Coating performance includes corrosion resistance, wear resistance, and aging resistance. Two coats make the coating thicker and denser, thus improving these properties. In addition, the second coat can repair and improve the first coat, further enhancing the overall performance of the coating.

[0066] Furthermore, if only one coat is applied, the following issues may arise: 1. Uneven coating: A single coat is relatively thick, making it prone to unevenness such as runs and orange peel, affecting the appearance quality of the coating; 2. Insufficient adhesion: A single coat may not be able to establish sufficient adhesion between the coating and the metal substrate, especially when the metal substrate surface has contaminants such as oil or rust, making it even more difficult to guarantee adhesion; 3. Degraded coating performance: Due to the thickness and potential unevenness of a single coat, the coating's corrosion resistance and abrasion resistance may decrease. In addition, a single coat may cause stress concentration within the coating, increasing the risk of cracking; 4. Increased rework risk: If the coating quality of a single coat is substandard (e.g., insufficient adhesion, uneven coating), rework is required, which will increase production costs and time losses, and may affect the product delivery date.

[0067] When powder coating, apply a zinc-rich primer and an acrylic polyurethane topcoat, eliminating the need for an intermediate coat. The primer thickness is 100-120μm, and the topcoat thickness is 100-120μm.

[0068] Furthermore, choosing zinc-rich primer offers the following advantages: 1. Excellent corrosion protection: The high zinc content in zinc-rich primer effectively isolates the metal surface from the external environment, preventing corrosion from moisture, oxygen, and chemicals. Zinc is chemically more reactive than iron, thus it is preferentially corroded in corrosive environments, protecting the iron substrate from corrosion. This sacrificial anode protection mechanism gives zinc-rich primer its excellent corrosion protection effect. 2. Cathodic protection effect: The zinc powder particles in zinc-rich primer have relatively active electrochemical properties. When zinc powder is exposed on the bare surface of the metal substrate, it forms a weak anodic current through dissolution and electron transfer, reducing the corrosion rate of the metal and thus protecting it. 3. Good adhesion: Zinc-rich primer can form a tight contact with the steel surface, ensuring a strong bond between the coating and the substrate, maintaining good adhesion even under harsh environmental conditions. 4. Durability and stability: Zinc-rich primer maintains stable corrosion protection performance during long-term use, and is not prone to aging, cracking, or peeling, thereby extending the service life of the metal.

[0069] Furthermore, if ordinary primers are used for anti-corrosion coatings, the following problems may be encountered: 1. Limited anti-corrosion effect: The anti-corrosion components and effects of ordinary primers may not be as significant as those of zinc-rich primers, and they cannot effectively isolate the metal surface from the external environment, making the metal susceptible to corrosion; 2. Insufficient adhesion: The adhesion of ordinary primers may be weak, and they are prone to peeling or detaching from the metal surface, thus affecting the overall effect and service life of the coating; 3. Poor durability: Ordinary primers are prone to aging, cracking, or peeling under harsh environmental conditions, and cannot provide long-term anti-corrosion protection for the metal.

[0070] Furthermore, the use of acrylic polyurethane topcoat has the following advantages: 1. Acrylic polyurethane topcoat has excellent weather resistance and outdoor UV resistance, meaning that it can maintain the color and gloss of the paint film even after long-term exposure to outdoor environments, without chalking or cracking. This is crucial for equipment such as transformers that need to operate outdoors for extended periods. 2. Acrylic polyurethane topcoat has excellent corrosion resistance, resisting the erosion of substances such as acids, water, oil, and heat. It also has good salt spray resistance, which allows it to protect transformers from corrosion even in harsh environments such as high humidity and high salt spray. 3. Acrylic polyurethane topcoat can be sprayed, brushed, or rolled, offering diverse application methods. The paint film has good leveling properties, and it can also cure at low temperatures, making the coating process more flexible and convenient.

[0071] Furthermore, in existing technologies, multiple powder coating processes are required to construct multi-layer protection. This technology simplifies the process by omitting the intermediate paint powder coating step. Simplifying the process not only reduces material and labor costs but also shortens the production cycle and improves production efficiency. In addition, reducing the number of powder coating processes may reduce the risk of coating defects such as bubbles and pinholes, further improving product quality.

[0072] Furthermore, the excellent adhesion between the primer and topcoat ensures the overall stability and continuity of the coating system. As the base layer of the coating, the primer's good adhesion not only effectively fixes it to the substrate surface but also provides a solid and suitable adhesion base for the topcoat. The topcoat, with its superior coverage and protective properties, directly covers the primer, forming a robust and aesthetically pleasing coating. In this case, one of the main functions of the intermediate coat, which is to enhance the adhesion between the primer and topcoat, has been replaced by the naturally excellent adhesion between the primer and topcoat. Therefore, eliminating the intermediate coat will not damage the overall structure of the coating, nor will it affect the corrosion resistance, weather resistance, and aesthetics of the coating system. On the contrary, this practice simplifies the coating application process, reduces construction costs, and improves construction efficiency.

[0073] Furthermore, setting the thickness of the primer and topcoat of the anti-corrosion paint layer within the range of 100-120μm has the following effects: 1. Anti-corrosion performance: The thickness of the anti-corrosion coating directly affects its anti-corrosion effect. Within an appropriate thickness range, the coating can more effectively isolate the metal surface from the external corrosive environment, thereby extending the service life of the metal. Generally speaking, the thicker the anti-corrosion coating, the better its anti-corrosion performance. However, excessively thick coatings may lead to problems such as decreased adhesion and prolonged drying time; 2. Adhesion: The adhesion of the coating is a key factor in ensuring a strong bond between the coating and the substrate. An appropriate coating thickness helps to enhance the adhesion of the coating. 1. Adhesion of the coating layer to prevent peeling or detachment during use; 2. Weather resistance: The weather resistance of the coating refers to its ability to maintain stable performance under various climatic conditions. Appropriate coating thickness helps to improve the weather resistance of the coating and reduce problems such as aging and cracking caused by environmental factors; 3. Construction difficulty: The thickness of the coating also affects the ease of construction. An excessively thick coating may require more paint and a longer drying time, increasing construction costs and difficulty, while an excessively thin coating may not meet the anti-corrosion requirements; 4. Cost-effectiveness: Under the premise of ensuring anti-corrosion effect, reasonably controlling the coating thickness helps to reduce costs and improve economic benefits.

[0074] Furthermore, when the thickness of the primer and topcoat of the anti-corrosion paint layer exceeds 100-120μm, the following situations may occur: 1. Decreased adhesion: Excessive coating thickness may lead to decreased adhesion between the coating and the substrate, increasing the risk of coating peeling; 2. Extended drying time: Excessive coating thickness will extend the drying time, increasing the construction cycle and cost; 3. Waste of paint: Excessive coating thickness means that more paint is used, increasing material costs.

[0075] Furthermore, when the thickness of the primer and topcoat of the anti-corrosion paint layer is less than 100-120μm, the following situations may occur: 1. Insufficient anti-corrosion effect: The coating is too thin and may not provide sufficient anti-corrosion protection, making the metal surface susceptible to corrosion; 2. Reduced durability: The coating is too thin and may not be able to withstand long-term erosion from the external environment, leading to problems such as rapid aging and cracking of the coating; 3. Increased maintenance costs: Due to insufficient anti-corrosion effect, more frequent maintenance and repair work may be required, increasing maintenance costs.

[0076] Furthermore, in summary, setting the thickness of the primer and topcoat of the anti-corrosion paint layer within the range of 100-120μm is the result of comprehensive consideration to ensure that the coating achieves the best balance in terms of anti-corrosion effect, adhesion, weather resistance and cost-effectiveness. At the same time, the thickness of the coating should be strictly controlled during the construction process to avoid being too thick or too thin.

[0077] The total dry film thickness on the surface of the fuel tank shall not be less than 240 μm.

[0078] Furthermore, this technical solution requires that after electrophoresis and powder coating, the total dry film thickness on the surface of the oil tank should not be less than 240μm. By controlling the product quality, it is ensured that sufficient dry film thickness can provide stronger anti-corrosion protection, and also means higher mechanical strength and wear resistance. This helps the transformer oil tank maintain its performance in harsh environments, reduces maintenance needs, and extends the replacement cycle.

[0079] The powder coating uses a corrosion-resistant grade of C4 or higher.

[0080] Furthermore, C4 grade indicates high corrosion resistance requirements, suitable for areas with severe corrosive environments. C4 grade environments include: high humidity, salt spray, industrial pollution, and marine environments. The advantages and benefits of choosing C4 or higher corrosion-resistant powder coatings are: 1. Enhanced corrosion resistance: C4 grade powder coatings provide stronger corrosion resistance, suitable for highly corrosive environments such as coastal areas, which helps extend the service life of transformer tanks; 2. Improved reliability: Due to the special environmental conditions in coastal areas, using high-grade powder coatings can reduce transformer failures caused by corrosion, improving the operational reliability of transformers; 3. Reduced maintenance costs: High-grade powder coatings can reduce the need for maintenance and repair due to corrosion, thereby reducing long-term maintenance costs; 4. Improved coating durability: C4 grade powder coatings generally have better durability, resisting erosion from ultraviolet rays, temperature changes, and other environmental factors; 5. Enhanced coating adhesion: High-grade powder coatings may have stronger adhesion, which helps the coating adhere more firmly to the surface of the transformer tank and is less prone to peeling.

[0081] Example 2

[0082] Reference Figures 1-3 This is a second embodiment of the present invention, providing an auxiliary grinding device for transformer oil tanks. This device includes...

[0083] The transformer tank mechanism 100 includes a transformer tank 101 and a heat dissipation part 102 disposed on the transformer tank 101;

[0084] The sliding mechanism 200 includes a sliding part 201 disposed on the heat dissipation part 102, a lifting part 202 disposed on the sliding part 201, and a power part 203 disposed on the lifting part 202;

[0085] The polishing mechanism 300 includes an output rod 301 mounted on the power unit 203, two sets of rotating parts 302 mounted on the output rod 301, a polishing part 303 mounted on the rotating parts 302, an adjustment part 304 mounted on the polishing part 303, a handle part 305 mounted on the output rod 301, and a linkage part 306 mounted on the handle part 305 and connected to the adjustment part 304.

[0086] The heat dissipation part 102 includes heat dissipation fins 102a disposed on the transformer oil tank 101 and reinforcing ribs 102b disposed on the heat dissipation fins 102a; wherein, a plurality of heat dissipation fins 102a are disposed, and the spacing between two adjacent heat dissipation fins 102a is the same, for heat dissipation of the transformer oil tank 101, and the reinforcing ribs 102b are welded and fixed to the ends of the heat dissipation fins 102a to increase the structural strength of the heat dissipation fins 102a.

[0087] The sliding part 201 includes four sliding blocks 201a disposed on the heat sink 102a, a sliding groove 201b disposed on the sliding block 201a and adapted to the heat sink 102a, and an arc-shaped extrusion surface 201c disposed on the sliding block 201a. The four sliding blocks 201a are rectangularly distributed on the outer periphery of the polishing mechanism 300. The sliding groove 201b is opened at the bottom of the sliding block 201a and is used to engage with the top of the heat sink 102a, so that the device can move along the heat sink 102a to facilitate polishing of the heat sink 102a. The arc-shaped extrusion surface 201c is disposed at both ends of the sliding block 201a and is arc-shaped. When the reinforcing rib 102b is extruded, the reinforcing rib 102b can lift the sliding block 201a, so that the polishing mechanism 300 can approach the edge of the heat sink 102a and increase the polishing effect of the device.

[0088] The lifting unit 202 includes a lifting guide rod 202a disposed on the sliding block 201a, a lifting spring 202b disposed on the lifting guide rod 202a, and a push handle 202c disposed on the lifting guide rod 202a. The lifting guide rod 202a is fixedly disposed on the top of the sliding block 201a, the lifting spring 202b is sleeved on the lifting guide rod 202a, and the push handle 202c is fixedly disposed on the top of the lifting guide rod 202a, which facilitates the operator to push the device. When pushing the device to the left, the operator holds the left push handle 202c, which facilitates the right sliding block 201a to rise, thereby facilitating the grinding of the edge of the heat sink 102a.

[0089] The power unit 203 includes a bracket 203a mounted on the lifting guide rod 202a and a power motor 203b mounted on the bracket 203a and connected to the output rod 301. The bracket 203a is slidably mounted on the lifting guide rod 202a to support the grinding mechanism 300, and the power motor 203b provides power for the rotation of the grinding mechanism 300.

[0090] Furthermore, the output end of the power motor 203b is connected to the top of the output rod 301 via a coupling, and the power motor 203b is equipped with overload protection. When the motor encounters excessive resistance, it can automatically disconnect the connection between the motor and the gearbox to prevent damage to the motor and to prevent injury to the operator.

[0091] The remaining structure is the same as that in Example 1.

[0092] During use, the grinding mechanism 300 is inserted into the gap between the heat sinks 102a, and the sliding groove 201b on the sliding block 201a is engaged in the top of the heat sink 102a. The power motor 203b is started to drive the grinding mechanism 300 to rotate. The push handle 202c is pushed to drive the lifting guide rod 202a to move the bracket 203a. The bracket 203a drives the grinding mechanism 300 to move, and the gap between the heat sinks 102a is ground.

[0093] When grinding to the edge of the heat sink 102a, the sliding block 201a near the reinforcing rib 102b presses against the reinforcing rib 102b, and the reinforcing rib 102b presses against the arc-shaped pressing surface 201c, causing the sliding block 201a near the reinforcing rib 102b to rise, so that the grinding mechanism 300 can grind the edge of the heat sink 102a.

[0094] Example 3

[0095] Reference Figures 2-8 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that the rotating part 302 includes a rotating frame 302a disposed on the output rod 301, and a rotating telescopic groove 302b disposed on the rotating frame 302a. Several rotating telescopic grooves 302b are arranged in a ring on the top of the rotating frame 302a. The rotating frame 302a is fixedly disposed on the output rod 301, allowing the output rod 301 to drive the rotating frame 302a to rotate the grinding disc 303c. The rotating telescopic grooves 302b are used to install the grinding telescopic rod 303a. The arrangement of two sets of rotating frames 302a, one set at the top of the output rod 301 and the other set at the bottom of the output rod 301, ensures the stability and structural strength of the grinding disc 303c.

[0096] The polishing unit 303 includes a polishing telescopic rod 303a disposed on the rotating telescopic groove 302b, a polishing linkage block 303b disposed on the polishing telescopic rod 303a, and a polishing disc 303c disposed on the polishing telescopic rod 303a. The polishing telescopic rod 303a is slidably connected to the rotating telescopic groove 302b. The polishing linkage block 303b is disposed on the top of the polishing telescopic rod 303a and located near the output rod 301 to facilitate the extension and retraction of the polishing telescopic rod 303a. The polishing disc 303c is connected between the two sets of rotating parts 302 and is fixedly connected to the polishing telescopic rod 303a and is arranged in an arc shape.

[0097] The adjustment unit 304 includes an adjustment plate 304a disposed on the rotating frame 302a and connected to the output rod 301, and an adjustment linkage groove 304b disposed on the adjustment plate 304a and adapted to the grinding linkage block 303b. Several adjustment linkage grooves 304b are provided and are distributed in a ring on the adjustment plate 304a. The adjustment plate 304a and the output rod 301 are rotatably connected by bearings. The adjustment linkage grooves 304b are arc-shaped. The rotation of the adjustment plate 304a drives the adjustment linkage grooves 304b to move the grinding linkage block 303b along the adjustment linkage grooves 304b, thereby driving the grinding disc 303c to unfold or retract.

[0098] The handle portion 305 includes a rotating handle 305a disposed on the output rod 301, an internal thread 305b disposed in the rotating handle 305a, a spline groove 305c disposed on the rotating handle 305a, and an external thread 305d disposed on the output rod 301 and adapted to the internal thread 305b; wherein, the rotating handle 305a is threadedly connected to the output rod 301 through the internal thread 305b and the external thread 305d, and rotating the rotating handle 305a moves up and down along the external thread 305d.

[0099] The linkage unit 306 includes a linkage pipe 306a disposed on the rotating handle 305a and connected to the adjusting plate 304a, and a linkage spline 306b disposed within the linkage pipe 306a and adapted to the spline groove 305c. The linkage pipe 306a is slidably connected to the rotating handle 305a through the linkage spline 306b and the spline groove 305c, ensuring that the rotation of the rotating handle 305a can drive the linkage pipe 306a to rotate, while the lifting and lowering of the rotating handle 305a will not drive the lifting and lowering of the linkage pipe 306a, ensuring the normal use of the device. The linkage pipe 306a is fixedly connected to the adjusting plate 304a, so the rotation of the linkage pipe 306a can drive the adjusting plate 304a to rotate, thereby adjusting the distance of the grinding disc 303c, ensuring that the grinding disc 303c is in close contact with the side of the heat sink 102a, and ensuring the grinding effect of the device.

[0100] The remaining structure is the same as that in Example 2.

[0101] During use, when it is necessary to adjust the grinding disc 303c, due to the setting of the internal thread 305b and the external thread 305d, rotating the handle 305a moves along the output rod 301. Due to the setting of the spline groove 305c and the linkage spline 306b, rotating the handle 305a drives the linkage tube 306a to rotate. The linkage tube 306a drives the adjusting plate 304a to rotate the adjusting linkage groove 304b. The adjusting linkage groove 304b drives the grinding linkage block 303b to move the grinding telescopic rod 303a along the rotating telescopic groove 302b. The movement of the grinding telescopic rod 303a drives the grinding disc 303c to move, so that the grinding disc 303c unfolds in a ring shape, thereby making close contact between the grinding disc 303c and the side wall of the heat sink 102a, ensuring the grinding effect of the device.

[0102] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims. Furthermore, for the purpose of providing a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features not relevant to the currently considered best mode for carrying out the invention, or those features not relevant to implementing the invention) may be omitted.

[0103] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A transformer tank auxiliary grinding device, characterized in that: include, The transformer tank mechanism (100) includes a transformer tank (101) and a heat dissipation part (102) disposed on the transformer tank (101). The sliding mechanism (200) includes a sliding part (201) disposed on the heat dissipation part (102), a lifting part (202) disposed on the sliding part (201), and a power part (203) disposed on the lifting part (202). The polishing mechanism (300) includes an output rod (301) disposed on the power unit (203), two sets of rotating parts (302) disposed on the output rod (301), a polishing part (303) disposed on the rotating part (302), an adjusting part (304) disposed on the polishing part (303), a handle part (305) disposed on the output rod (301), and a linkage part (306) disposed on the handle part (305) and connected to the adjusting part (304). The heat dissipation part (102) includes a heat dissipation fin (102a) disposed on the transformer oil tank (101) and a reinforcing rib (102b) disposed on the heat dissipation fin (102a). The sliding part (201) includes a sliding block (201a) disposed on the heat sink (102a), the sliding block (201a) having four sliding grooves (201b) disposed on the sliding block (201a) and adapted to the heat sink (102a), and an arc-shaped extrusion surface (201c) disposed on the sliding block (201a).

2. The transformer tank auxiliary grinding device according to claim 1, characterized in that: The lifting part (202) includes a lifting guide rod (202a) disposed on the sliding block (201a), a lifting spring (202b) disposed on the lifting guide rod (202a), and a push handle (202c) disposed on the lifting guide rod (202a).

3. The transformer tank auxiliary grinding device according to claim 2, characterized in that: The power unit (203) includes a bracket (203a) mounted on the lifting guide rod (202a) and a power motor (203b) mounted on the bracket (203a) and connected to the output rod (301).

4. The transformer tank auxiliary grinding device according to claim 3, characterized in that: The rotating part (302) includes a rotating frame (302a) disposed on the output rod (301) and a rotating telescopic groove (302b) disposed on the rotating frame (302a). The rotating telescopic groove (302b) is provided in a plurality of places and is distributed in a ring on the top of the rotating frame (302a).

5. The transformer tank auxiliary grinding device according to claim 4, characterized in that: The polishing part (303) includes a polishing telescopic rod (303a) disposed on the rotating telescopic groove (302b), a polishing linkage block (303b) disposed on the polishing telescopic rod (303a), and a polishing disc (303c) disposed on the polishing telescopic rod (303a).

6. The transformer tank auxiliary grinding device according to claim 5, characterized in that: The adjustment part (304) includes an adjustment plate (304a) disposed on the rotating frame (302a) and connected to the output rod (301), and an adjustment linkage groove (304b) disposed on the adjustment plate (304a) and adapted to the grinding linkage block (303b). The adjustment linkage groove (304b) is provided in a plurality of places and is distributed in a ring on the adjustment plate (304a).

7. The transformer tank auxiliary grinding device according to claim 6, characterized in that: The handle (305) includes a rotating handle (305a) disposed on the output rod (301), an internal thread (305b) disposed in the rotating handle (305a), a spline groove (305c) disposed on the rotating handle (305a), and an external thread (305d) disposed on the output rod (301) and adapted to the internal thread (305b). The linkage part (306) includes a linkage tube (306a) disposed on the rotating handle (305a) and connected to the adjusting plate (304a), and a linkage spline (306b) disposed in the linkage tube (306a) and adapted to the spline groove (305c).

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