Galvanizing device and galvanizing process for green matte steel of electric power iron tower

Abstract

The invention relates to the field of galvanization, and particularly discloses a galvanization device and galvanization process for green matte steel of an electric power iron tower. The galvanization device comprises a galvanization device body located above a galvanization pool and a passivation pool located on the rear side, and the galvanization device body comprises a hanging frame connected with hoisting equipment; the sliding springback part slides relative to the galvanizing bath; the sealing cover part is used for shielding or opening the top of the galvanizing bath along with the movement of the sliding springback part; the ash scraping part is used for scraping zinc ash on the surface of the zinc liquid when moving along with the sealing cover part; and the transmission supporting part is used for pushing the sliding springback part to drive the sealing cover part to move towards the two sides of the galvanizing bath in the descending process of the hanging frame, so that the top of the galvanizing bath is converted into an open state from a shielding state, and meanwhile, the sealing cover part drives the ash scraping part to scrape zinc ash on the surface of the zinc liquid. According to the zinc ash removing device, zinc ash can be automatically removed, the top of the galvanizing pool can be shielded and closed when galvanizing operation is not carried out, the safety accident of accidental falling is avoided, and meanwhile the heat preservation effect of molten zinc is improved.

Description

Technical Field

[0001] This invention relates to the field of galvanizing technology, specifically to a green matte galvanizing device and galvanizing process for power transmission tower steel. Background Technology

[0002] Galvanizing is a surface treatment technology that involves coating the surface of metals, alloys, or other materials with a layer of zinc for aesthetic purposes, rust prevention, and other functions. In the production of power transmission tower components, hot-dip galvanizing is often used. A crane (in the factory) lifts a rack laden with steel to the top of a galvanizing bath and lowers it at a certain speed until the steel is submerged in molten zinc. After sufficient contact with the zinc solution, the steel is removed by the crane. The temperature of the molten zinc is generally around 450℃. Zinc evaporation occurs when the zinc vapor is oxidized upon contact with air, then falls onto the surface of the molten zinc like snowflakes, forming zinc ash. This causes zinc to easily adhere to the galvanized layer during galvanizing, resulting in defects such as roughness, particle formation, and reduced gloss on the steel surface. The zinc ash is usually scraped off manually before galvanizing. However, manual scraping is inefficient. Furthermore, the top of the galvanizing bath is fully open before galvanizing, resulting in poor insulation of the molten zinc and a lack of safety measures, increasing the risk of worker falls.

[0003] Meanwhile, with the increasing efforts in national ecological and environmental protection and the in-depth promotion of green infrastructure construction policies, the requirements for environmental harmony and visual integration of steel structure products such as power transmission towers are becoming increasingly stringent. Traditional hot-dip galvanized steel towers have a silvery-white, high-gloss surface, which can easily create visual jarring effects in forest reserves, plateau areas, and other similar settings. Moreover, in areas with thin air and strong sunlight, such as Tibet, the duration of light pollution is significantly prolonged due to weak atmospheric corrosion and long hours of sunshine, seriously affecting the ecological environment and human visual experience.

[0004] Traditional green treatment processes such as galvanizing and painting have drawbacks such as high cost, easy peeling, and frequent maintenance. VCI bimetallic coating and color galvanizing technologies face problems such as insufficient anti-corrosion performance or high technical difficulty. Summary of the Invention

[0005] The purpose of this invention is to provide a green matte galvanizing device and process for power transmission tower steel. This process not only automates zinc ash removal, reducing manual labor and improving efficiency, but also allows for shielding and sealing the top of the galvanizing tank during non-galvanizing operations, preventing accidental falls and improving the heat retention of the zinc bath. After hot-dip galvanizing, the galvanized parts can be passivated, forming a green matte protective film on their surface, effectively preventing corrosion and oxidation, and solving the problems of light pollution and environmental harmony associated with galvanized parts.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution: A green matte galvanizing device for power transmission tower steel includes a galvanizing device body installed above a galvanizing bath. A passivation bath is located behind the galvanizing bath for depositing a green matte passivation film onto the surface of the galvanized steel. The passivation bath stores a green matte passivation coloring solution. The galvanizing device body includes: The hanging rack is used to connect with lifting equipment to facilitate the transfer and galvanizing of steel. The sliding spring section is arranged on both sides of the galvanizing tank and can slide relative to the galvanizing tank to adapt to the lifting of the hanging rack. The sealing part is connected to the sliding spring part and spans across the galvanizing tank. It is used to cover or open the top of the galvanizing tank by following the movement of the sliding spring part. During galvanizing operation, the top of the galvanizing tank is open, and when galvanizing is not in operation, the top of the galvanizing tank is covered. The scraping section is located at one end of the sealing section and is used to scrape off the zinc ash on the surface of the zinc liquid as it moves with the sealing section. The transmission support part is hinged to the sliding spring part to support the hanging frame. During the descent of the hanging frame, the sliding spring part is pushed to move the sealing part to both sides of the galvanizing tank, so that the top of the galvanizing tank changes from a covered state to an open state. At the same time, the sealing part drives the ash scraping part to scrape off the zinc ash on the surface of the zinc liquid. The lifting equipment (3) transports the cooled galvanized steel to a passivation pool containing green matte passivation coloring liquid for immersion. After taking it out, it is left to stand for 1 minute to form a dense green matte passivation film on the surface of the galvanized steel.

[0007] In this scheme, initially, the galvanizing tank is basically covered by the cover, the top of the galvanizing tank is closed, and the scraper is located in the middle of the galvanizing tank. The lifting equipment transports the hanging rack to the prepared position above the galvanizing tank. The operator or automatic control system starts, and the hanging rack begins to slowly descend, preparing to immerse the steel in the zinc tank. As the hanging rack descends, the transmission support connected to it begins to move. The movement of the transmission support is converted into a horizontal thrust on the sliding spring part. The cover, like two sliding doors, is smoothly pushed to both sides of the galvanizing tank, the tank opening is opened, and the scraper is fixed to the inner edge of the cover. When the cover... As it slides to both sides, the scraper moves from the center of the galvanizing tank to both sides, thoroughly scraping the zinc ash floating on the surface to the collection area at the edge of the tank. The tank opening is fully open, scraping is complete, the surface is clean, and the hanging rack continues to descend, immersing the steel into the clean zinc liquid to begin galvanizing. The cover is fully open, the scraper stops at the edge of the tank, galvanizing is complete, the hanging rack rises, and under the action of the sliding spring, the cover automatically slides towards the center to close, re-covering the zinc tank. The driving force of the entire system comes from the lifting and lowering of the hanging rack, which distributes the power to the two processes of opening the cover and scraping the ash, realizing a fully automated process where descending opens the cover and scrapes the ash, and rising closes the cover and keeps the tank warm.

[0008] The sealing section of this design can isolate a certain amount of air when not in operation, minimizing the oxidation reaction on the zinc bath surface and directly reducing the loss of zinc metal into zinc ash, thus saving raw materials. The sealing section acts as a temperature-controlled cover, greatly reducing radiative and convective heat loss from the zinc bath into the air. After sealing, the energy consumption of the heating system is significantly reduced, maintaining a stable zinc bath temperature. The normally closed sealing section prevents extreme safety accidents such as tools, debris, or even personnel accidentally falling into the zinc bath, and the high-temperature zinc bath surface is no longer exposed, significantly improving safety.

[0009] In the high-temperature zone of the zinc bath, the capping section can effectively suppress the unorganized escape of zinc vapor, reducing the generation of zinc fumes in the workshop from the source, greatly improving the working environment for workers. In conjunction with the flue collection system, the limited zinc fumes inside the capping section are centrally treated, which is more efficient, economical and easier to meet environmental emission standards than treating zinc fumes that diffuse from open pools.

[0010] Before each galvanizing process, mandatory and mechanized slag removal is performed to ensure that the steel enters a clean zinc bath environment free of slag. Automated operation avoids the randomness and omissions of manual slag removal, ensuring the consistency of pre-galvanizing conditions for each batch of workpieces, thereby stabilizing the overall galvanizing quality. The heavy and high-risk operations of manual slag skimming and manual covering / uncovering of insulation covers are completely eliminated, realizing the automation of auxiliary processes.

[0011] Optionally, the sliding rebound part includes a slider, a guide rod, and a return spring. The slider is slidably embedded on the top length side of the galvanizing tank. The two ends of the guide rod are respectively connected to the width side of the galvanizing tank. The guide rod passes through the slider. The return spring is located on the side of the slider. The slider is connected to the cover part. The scraping part is located at the end of the cover part away from the width side of the galvanizing tank. The lower end of the transmission support part is hinged to the slider, and the upper end is in contact with the hanging rack.

[0012] Optionally, two sliders are distributed on the same side of the galvanizing tank. The long side of the galvanizing tank is provided with a groove adapted to the slider. The guide rod and the return spring are both located in the groove. The return spring is sleeved on the guide rod and is located between the two sliders on the same side and between the slider and the width side of the galvanizing tank.

[0013] Optionally, the top of the chute is provided with a flexible heat-resistant cloth, which is located between the two sliders on the same side and between the slider and the width side of the galvanizing pool. The flexible heat-resistant cloth expands or contracts as the slider moves to achieve dynamic sealing of the chute opening.

[0014] Optionally, the sealing part includes a first insulating cover and a second insulating cover spanning the top of the galvanizing tank. One end of the first insulating cover is connected to two sliders in the width direction of the galvanizing tank, and the other end extends to the outside of the galvanizing tank. The second insulating cover is connected to two sliders in the width direction of the galvanizing tank, and the other end is connected to the scraping part. The first insulating cover and the second insulating cover are symmetrically distributed about the axis in the width direction of the galvanizing tank.

[0015] Optionally, the first thermal insulation cover includes multiple thermal insulation strips, with adjacent thermal insulation strips connected by ceramic fiber woven straps. The bottom surface of the first thermal insulation cover is provided with an X-shaped telescopic frame. One end of the telescopic frame is connected to the width side of the galvanizing tank, and the other end is connected to two corresponding sliders. The telescopic frame supports the first thermal insulation cover. The side wall of the galvanizing tank is provided with guide wheels that contact the first thermal insulation cover, and a collection box for collecting the first thermal insulation cover is provided below the guide wheels.

[0016] Optionally, the scraping part is hinged to the second insulation cover, the scraping part is mesh-shaped, the length of the scraping part is adapted to the width of the galvanizing tank, and the included angle between the scraping part and the second insulation cover is between 90° and 180°.

[0017] Optionally, the bottom surface of the second heat-insulating cover contacts the top surface of the galvanizing tank at an angle. The top surface of the galvanizing tank is provided with a top block with a spherical top. The top block supports the second heat-insulating cover. The second heat-insulating cover is hinged to two corresponding sliders. When the second heat-insulating cover moves to the width side of the galvanizing tank, the height of the second heat-insulating cover decreases, causing the scraping part to contact the zinc liquid and scrape off the ash. Conversely, the height of the second heat-insulating cover increases, causing the scraping part to separate from the zinc liquid.

[0018] Optionally, the transmission support includes a force transmission rod and a support frame. The support frame is rectangular, and the length of the support frame is not less than the width of the hanging frame. The force transmission rod is hinged to the four corners of the support frame, and the lower end of the force transmission rod is hinged to the four corresponding sliders.

[0019] A green matte galvanizing process for power transmission tower steel includes the following steps: S1: Hang several steel pieces to be galvanized on the bottom of the hanging rack. The lifting equipment lifts the hanging rack to the top of the galvanizing tank. The lifting equipment is lowered until the bottom of the hanging rack contacts the support frame. Care should be taken to avoid the support frame with the steel pieces. S2: The hanging rack slowly descends. Under the weight of the hanging rack and the steel, the support frame is compressed and its height decreases. Consequently, the force transmission rod is compressed, causing the angle between the force transmission rod and the top surface of the galvanizing tank to decrease. The force transmission rod pushes the slider to move to both sides of the galvanizing tank. The return springs on both sides are compressed, and the return spring in the middle is stretched, causing the two first insulation covers to move towards the width of the galvanizing tank. At the same time, the two second insulation covers in the middle also move towards the width of the galvanizing tank. The top area of ​​the galvanizing tank changes from a covered state to an open state. The inclined surfaces on both sides of the bottom surface of the second insulation cover slide in cooperation with the top block. The height of the second insulation cover decreases, allowing the scraper to contact the zinc liquid. At this time, the steel has not yet contacted the zinc liquid. S3: The hanging rack continues to move down, and the distance between the two second insulation covers gradually increases. The ash-scraping part scrapes the zinc ash off the surface of the zinc bath until the area where the zinc ash has been scraped can completely accommodate all the steel. The steel then descends to the position where it will be in contact with the zinc bath. At this time, the hanging rack continues to move down until the steel is completely submerged in the zinc bath. At this time, the force transmission rod is basically parallel to the top surface of the galvanizing tank or has an acute angle with it. S4: After galvanizing is completed, the lifting equipment slowly lifts the hanging rack upwards. The lifting speed is matched with the return speed of the return spring. Under the action of the return spring, the slider moves towards the center of the galvanizing tank, which also moves the first insulation cover towards the center of the galvanizing tank, gradually covering the areas on both sides of the galvanizing tank. At the same time, it also moves the second insulation cover towards the center. When the second insulation cover moves towards the center of the galvanizing tank, the height of the second insulation cover increases, the height of the scraper rises and it separates from the zinc liquid. The second insulation cover gradually covers the central area of ​​the galvanizing tank until it is completely covered. The lifting equipment then lifts the galvanized steel to the designated location. S5: Galvanized steel is cooled to below 200℃ and then enters the passivation tank. The passivation tank contains a green matte passivation coloring solution, which includes a chromium-free passivating agent, water-based silicone resin, TiO2 nanoparticles, and a dye. The pH value is 11.5, and the soaking time is ≥3 minutes. After being taken out, it is left to stand for 1 minute to form a dense green matte passivation film.

[0020] The beneficial effects of this invention are as follows: 1. In this invention, the sealing part can isolate a certain amount of air when not in operation, minimizing the oxidation reaction on the surface of the zinc liquid, directly reducing the loss of zinc metal into zinc ash, and saving raw materials. The sealing part is equivalent to a constant temperature cover, greatly reducing the radiation and convection heat loss of the zinc liquid into the air. After sealing, the energy consumption of the heating system can be significantly reduced, and the temperature of the zinc liquid can be kept stable.

[0021] 2. The normally closed cover prevents extreme safety accidents such as tools, debris, or even personnel accidentally falling into the zinc bath, and the surface of the high-temperature zinc bath is no longer exposed, greatly improving safety.

[0022] 3. In the high-temperature zone of the zinc bath, the sealing part can effectively suppress the unorganized escape of zinc vapor, reduce the generation of zinc fumes in the workshop from the source, greatly improve the working environment of workers, and, together with the flue collection system, centrally treat the limited zinc fumes inside the sealing part. This is more efficient, more economical, and easier to meet environmental emission standards than treating zinc fumes that diffuse in open pools.

[0023] 4. Before each galvanizing process, mandatory and mechanized scraping is performed to ensure that the steel enters a clean zinc bath environment free of slag. The automated process avoids the randomness and omissions of manual scraping, ensuring the consistency of pre-galvanizing conditions for each batch of workpieces, thereby stabilizing the overall galvanizing quality.

[0024] 5. The heavy and dangerous manual ash skimming and manual covering / uncovering of insulation covers have been completely eliminated, realizing the automation of auxiliary processes.

[0025] 6. A dense, matte green film is applied to the steel of the power transmission towers to effectively prevent corrosion and oxidation, while also solving the problem of light pollution from galvanized parts and environmental compatibility, making it especially suitable for high-altitude areas with thin air. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure when the scraping section of the hanging frame is scraping ash during the downward movement of the ash scraping section. Figure 3 A schematic diagram of the initial state of the galvanizing bath with the upper part of it covered. Figure 4 This is a structural diagram of the galvanizing tank after the upper part is opened; Figure 5 This is a top view of the first thermal insulation cap structure. Figure 6 This is a top view of the sliding spring mechanism. Figure 7 This is a structural diagram of the slide after the flexible heat-resistant fabric has been sealed. Figure 8 This is a structural diagram of the plastering section; Figure 9 This is a structural diagram of the passivation cell.

[0027] Reference numerals: 1-Galvanizing tank, 2-Hanging rack, 3-Lifting equipment, 4-Steel, 5-Supporting frame, 6-Force transmission rod, 7-Sliding block, 8-First insulation cover, 801-Insulation strip, 802-Ceramic fiber woven belt, 9-Second insulation cover, 10-Scraping part, 11-Top block, 12-Guide wheel, 13-Collection box, 14-Slide groove, 15-Reset spring, 16-Guide rod, 17-Flexible heat-resistant cloth, 18-Telescopic frame, 19-Passivation tank, 20-Aeration pipe, 21-Aeration hole. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0029] A green matte galvanizing device for power transmission tower steel includes a galvanizing device body installed above a galvanizing bath 1. A passivation bath 19 is provided behind the galvanizing bath 1 for depositing a green matte passivation film onto the surface of the galvanized steel. The passivation bath 19 stores a green matte passivation coloring solution. The galvanizing device body includes: The hanging rack 2 is used to connect with the lifting equipment 3 to realize the transfer and galvanizing of steel 4; The sliding spring section is arranged on both sides of the galvanizing tank 1 and can slide relative to the galvanizing tank 1 to adapt to the lifting of the hanging rack 2. The sealing part is connected to the sliding spring part and spans across the galvanizing tank 1. It is used to follow the movement of the sliding spring part to cover or open the top of the galvanizing tank 1. During galvanizing operation, the top of the galvanizing tank 1 is open, and when galvanizing is not in operation, the top of the galvanizing tank 1 is covered. The scraping part 10 is located at one end of the sealing part and is used to scrape off zinc ash from the surface of the zinc liquid when it moves with the sealing part. The transmission support part is hinged to the sliding spring part and is used to support the hanging rack 2. During the descent of the hanging rack 2, the sliding spring part is pushed to move the cover part to both sides of the galvanizing pool 1, so that the top of the galvanizing pool 1 changes from the covered state to the open state. At the same time, the cover part drives the scraper part 10 to scrape off the zinc ash on the surface of the zinc liquid.

[0030] The existing galvanizing bath 1 is generally a container with a rectangular cavity containing high-temperature zinc liquid. The galvanizing bath 1 is kept open all year round, that is, in an unobstructed open state.

[0031] In this embodiment, as Figure 1 and Figure 3 As shown, in the initial state (before galvanizing), the galvanizing tank 1 is basically completely covered by the cover, and the opening area at the top of the galvanizing tank 1 is basically closed, so workers or tools cannot fall directly into the galvanizing tank 1. The scraper 10 is located in the middle of the galvanizing tank 1. The lifting equipment 3 (overhead crane) transfers the hanging rack 2 (loaded with steel 4) to the preparatory position above the galvanizing tank 1. The operator or automatic control system starts, and the hanging rack 2 begins to slowly descend, preparing to immerse the steel 4 into the zinc tank.

[0032] like Figure 2 As shown, as the hanging rack 2 descends, it causes the transmission support to begin operating. The action of the transmission support is converted into a horizontal thrust on the sliding spring part. The cover part, like two sliding doors, is smoothly pushed towards both sides of the galvanizing tank 1. Figure 4 As shown, the pool opening is opened, that is, the galvanizing pool 1 changes from a covered state to an open state. The scraper 10 is fixed to the inner edge of the cover. When the cover slides to both sides, the scraper 10 moves from the middle of the galvanizing pool 1 to both sides, and thoroughly scrapes the zinc ash (zinc oxide) floating on the liquid surface to the collection area at the edge of the pool. When the hanging rack 2 descends to the point where the steel 4 is about to contact the liquid surface, the pool opening is fully opened. The opened area of ​​the galvanizing pool 1 can completely accommodate the steel 4 at the bottom of the hanging rack 2. At this time, the scraping is also completed and the liquid surface is clean.

[0033] Next, the hanging rack 2 continues to descend, immersing the steel 4 into the clean zinc bath to begin galvanizing. The cover is fully opened, and the scraping part 10 stops at the edge of the pool. After galvanizing is completed, the hanging rack 2 rises. Under the action of the sliding spring part, the cover automatically slides to the center to close and re-cover the zinc pool. The driving force of the entire system comes from the lifting and lowering of the hanging rack 2, which distributes the power to the two processes of opening the cover and scraping the ash, realizing a fully automated process of opening the cover and scraping the ash when descending and closing the heat preservation when rising.

[0034] High-temperature resistant ceramic fiber woven strip 802 or elastic graphite sealing strip can also be installed at the edge where the cover part contacts the wall of the galvanizing pool 1. This can improve the sealing effect when the cover part covers the galvanizing pool 1, further inhibiting the oxidation of zinc liquid and heat loss. At the same time, the cover part can adopt a three-layer structure, with the upper layer being heat insulation material (such as aluminum silicate fiberboard), the middle layer being a rigid skeleton, and the lower layer being a metal plate resistant to zinc liquid corrosion (such as 310S stainless steel), forming a multi-layer composite sandwich structure, which improves the heat insulation effect and the strength of the cover plate.

[0035] In this embodiment, the sealing section can isolate a certain amount of air when not in operation, minimizing the oxidation reaction on the surface of the molten zinc and directly reducing the loss of zinc metal into zinc ash, thus saving raw materials. The sealing section is equivalent to a constant-temperature cover, greatly reducing the radiative and convective heat loss of the molten zinc into the air. It has been calculated that the heat loss of an open zinc pool can account for more than 30% of the total energy consumption. After sealing, the energy consumption of the heating system can be significantly reduced, and the temperature of the molten zinc can be kept stable. The normally closed sealing section prevents extreme safety accidents such as tools, debris, or even personnel accidentally falling into the zinc pool. The surface of the high-temperature molten zinc pool is no longer exposed, greatly improving safety.

[0036] In the high-temperature zone of the zinc bath, the capping section can effectively suppress the unorganized escape of zinc vapor, reducing the generation of zinc fumes in the workshop from the source, greatly improving the working environment for workers. In conjunction with the flue collection system, the limited zinc fumes inside the capping section are centrally treated, which is more efficient, economical and easier to meet environmental emission standards than treating zinc fumes that diffuse from open pools.

[0037] Before each galvanizing process, mandatory and mechanized slag removal is performed to ensure that the steel enters a clean zinc bath environment free of slag. Automated operation avoids the randomness and omissions of manual slag removal, ensuring the consistency of pre-galvanizing conditions for each batch of workpieces, thereby stabilizing the overall galvanizing quality. The heavy and high-risk operations of manual slag skimming and manual covering / uncovering of insulation covers are completely eliminated, realizing the automation of auxiliary processes.

[0038] After galvanizing, the galvanized steel is cooled to below 200°C by the lifting equipment 3 and placed into the passivation tank 19. The passivation tank contains a green matte passivation coloring solution, which includes a chromium-free passivating agent, water-based silicone resin, TiO2 nanoparticles, and a dye. The pH value is 11.5, and the immersion time is ≥3 minutes. After being taken out, it is left to stand for 1 minute to form a dense green matte passivation film.

[0039] Furthermore, the sliding rebound part includes a slider 7, a guide rod 16, and a return spring 15. The slider 7 is slidably embedded in the top length side of the galvanizing tank 1. The two ends of the guide rod 16 are respectively connected to the width side of the galvanizing tank 1. The guide rod 16 passes through the slider 7. The return spring 15 is located on the side of the slider 7. The slider 7 is connected to the cover part. The scraping part 10 is located at the end of the cover part away from the width side of the galvanizing tank 1. The lower end of the transmission support part is hinged to the slider 7, and the upper end is in contact with the hanging rack 2.

[0040] Furthermore, there are two sliders 7 distributed on the same side of the galvanizing pool 1. The long side of the galvanizing pool 1 is provided with a groove 14 adapted to the slider 7. The guide rod 16 and the return spring 15 are both located in the groove 14. The return spring 15 is sleeved on the guide rod 16, and the return spring 15 is located between the two sliders 7 on the same side and between the slider 7 and the width side of the galvanizing pool 1.

[0041] Specifically, such as Figure 6 As shown, the slider 7 is rigidly connected to the cover, bearing its weight and transmitting motion. The guide rod 16 ensures that the slider 7 and the entire cover make accurate and stable linear movements along the length of the galvanizing tank 1, preventing deviation. The reset spring 15 provides the driving force to automatically reset the slider 7 and the cover. When the external thrust (from the transmission support) disappears, the spring force pushes the system back to the initial closed position. The slide groove 14 provides physical guidance and accommodation space for the slider 7.

[0042] In the initial state, the return spring 15 is in its natural state, the cover is in the closed position, completely covering the zinc bath, and the scraper 10 is located in the middle of the galvanizing bath 1. The hanging rack 2 descends, causing the upper end of the transmission support to be pressed down. After the transmission support is pressed, it acts as a rigid or lever body, and its lower end pushes the slider 7 to slide along the guide rod 16 to both sides of the galvanizing bath 1. The return spring 15 is compressed and stored energy, and the slider 7 drives the cover to open, while simultaneously driving the scraper 10 to complete the scraping.

[0043] The hanging rack 2 continues to descend until the steel 4 is completely submerged in the molten zinc. The transmission support maintains the pushing force on the slider 7, the cover remains open, and the spring remains compressed. After galvanizing, the hanging rack 2 gradually rises, the pushing force of the transmission support on the slider 7 is gradually released, the compressed return spring 15 releases energy, and pushes the sliders 7 on both sides to slide back to the center, the cover closes, and the system returns to its initial closed state.

[0044] The slider 7, guide rod 16, and spring are all standard mechanical parts, with low design, manufacturing, and maintenance costs and high reliability. The dual guidance of the slide groove 14 and guide rod 16 ensures the linearity and smoothness of the sealing part's movement, which is the basis for effective ash scraping and sealing. Automatic closing is achieved using springs without additional power or manual intervention, which conforms to the concept of automation design. The guiding and reset mechanisms are integrated into the slide groove 14 on the wall of the galvanizing tank 1, which does not occupy the space above, has a compact structure, and protects precision parts such as springs from direct heat radiation and zinc ash contamination.

[0045] Furthermore, the top of the chute 14 is provided with a flexible heat-resistant cloth 17, which is located between the two sliders 7 on the same side and between the sliders 7 and the width side of the galvanizing pool 1. The flexible heat-resistant cloth 17 expands or contracts as the sliders 7 move to achieve dynamic sealing of the opening of the chute 14.

[0046] Specifically, such as Figure 7 As shown, zinc oxide ash on the surface of the molten zinc, dust in the workshop air, and occasional splashes of zinc slag will fall into the open chute 14 without hindrance. The solid impurities that fall in will accumulate at the bottom of the chute 14, on the guide rod 16, or between the slider 7 and the chute wall, which can easily cause the slider 7 to move poorly or even get completely stuck, causing the entire automation system to fail. Zinc ash and other particles become abrasives, which will accelerate the wear of the slider 7, guide rod 16 and chute 14. Impurities may enter the gap of the spring coil, causing the spring to be unable to compress or rebound normally. Cleaning the impurities that are stuck deep in the chute 14 is very troublesome and requires stopping the machine and possibly disassembling the parts.

[0047] As slider 7 moves, the cloth covering its section of the slide groove 14 unfolds or folds accordingly, constantly shielding the currently exposed opening of the slide groove 14. When the cover is fully closed, all sliders 7 return to their positions, and the flexible heat-resistant cloth 17 completely covers and seals the entire slide groove 14, forming a physical barrier. This essentially eliminates the possibility of external impurities falling into the slide groove 14, ensuring extremely high reliability for the long-term operation of the slider 7 mechanism. It also virtually eliminates the need to clean the inside of the slide groove 14, saving significant maintenance time and manpower.

[0048] The flexible heat-resistant cloth 17 can be silicone rubber coated fiberglass cloth, polytetrafluoroethylene (PTFE) coated fiberglass cloth, or high-silica fiber woven cloth. These materials can withstand high temperatures for a long time and have good flexibility. The two ends of the cloth can be fixed in the slots of the slider 7 and the pool wall, or fixed with high-temperature pressure strip bolts. In this embodiment, three sections of flexible heat-resistant cloth 17 are provided on the same side of the galvanizing pool 1. The two ends of the cloth at the middle end are connected to the corresponding slider 7, and one end of the cloth on both sides is connected to the corresponding slider 7, and the other end is connected to the side wall of the galvanizing pool 1. The flexible heat-resistant cloth 17 forms an accordion-style or roller shutter-style structure, making it more orderly and more durable when it moves in a wide range with the slider 7.

[0049] Furthermore, the sealing part includes a first heat-insulating cover 8 and a second heat-insulating cover 9 spanning the top of the galvanizing tank 1. One end of the first heat-insulating cover 8 is connected to two sliders 7 in the width direction of the galvanizing tank 1, and the other end extends to the outside of the galvanizing tank 1. The second heat-insulating cover 9 is connected to the two sliders 7 in the width direction of the galvanizing tank 1, and the other end is connected to the scraping part 10. The first heat-insulating cover 8 and the second heat-insulating cover 9 are symmetrically distributed about the axis in the width direction of the galvanizing tank 1.

[0050] Specifically, the first insulating cover 8 and the second insulating cover 9 are symmetrically distributed along the width axis of the galvanizing tank 1. One end of the first insulating cover 8 is connected to the slider 7, and the other end extends to the outside of the galvanizing tank 1. One end of the second insulating cover 9 is connected to the slider 7, and the other end is directly connected to the scraping part 10. It is the direct carrier of the scraping function and also serves as an auxiliary insulating cover, transmitting the horizontal movement of the slider 7 to the scraping part 10 without delay or deformation, ensuring that the scraping action is synchronized with the opening action. During operation, the two systems slide synchronously to both sides under the push of the transmission support, like two doors opening in opposite directions. The first insulating cover 8 is located on both sides of the second insulating cover 9 and is always in a state of shielding the galvanizing tank 1, only the shielding area changes. The second insulating cover 9 drives the scraping part 10 to scrape ash from the center of the tank to the edge.

[0051] In this embodiment, multiple high-temperature resistant negative pressure suction nozzles (not shown in the figure) can be installed on the bottom surface of the second insulation cover 9. The suction nozzles can be connected to a small high-temperature induced draft fan through a flexible heat insulation pipe. The ash scraping part 10 scrapes up the zinc ash, and the negative pressure instantly sucks the light zinc ash into the external collection tank, realizing immediate removal and avoiding the accumulation of a large amount of zinc ash.

[0052] Furthermore, the first thermal insulation cover 8 includes multiple thermal insulation strips 801, and adjacent thermal insulation strips 801 are connected by ceramic fiber woven straps 802. The bottom surface of the first thermal insulation cover 8 is provided with an X-shaped telescopic frame 18. One end of the telescopic frame 18 is connected to the width side of the galvanizing tank 1, and the other end is connected to two corresponding sliders 7. The telescopic frame 18 supports the first thermal insulation cover 8. The side wall of the galvanizing tank 1 is provided with guide wheels 12 that contact the first thermal insulation cover 8, and a collection box 13 for collecting the first thermal insulation cover 8 is provided below the guide wheels 12.

[0053] Specifically, such as Figure 5As shown, the first thermal insulation cover 8 is designed to be composed of multiple independent rigid thermal insulation strips 801 connected in series. The strips are connected by flexible, high-temperature resistant ceramic fiber woven tape 802, forming a rigid-flexible composite chain armor structure. Alternatively, thin steel sheets with a certain degree of hardness can be used for connection. The thin steel sheets also have flexibility, and each strip can expand / contract independently by a small amount. The flexible connecting tape absorbs all deformation stress, completely eliminating the problem of large integral cover plates warping and jamming due to thermal stress. The ceramic fiber woven tape 802 itself is soft and high-temperature resistant, and can be tightly compressed when the cover is closed to form an effective soft seal, blocking zinc fumes and heat flow.

[0054] The X-shaped telescopic frame 18 is a telescopic support frame located on the bottom surface of the cover plate, with one end fixed to the pool wall and the other end connected to the movable slider 7. The X-shape usually refers to a scissor brace or a parallel four-bar linkage mechanism. As the slider 7 moves, the telescopic frame 18 expands or retracts synchronously, always providing a stable bottom support for the first heat-insulating cover 8 (especially its suspended part) throughout its entire stroke, preventing it from sagging and deforming due to its own weight and high temperature softening, and ensuring that the cover plate maintains an ideal flatness throughout the opening and closing process. This is the key to achieving effective sealing and smooth movement.

[0055] Guide wheels 12 are installed on the side wall of the galvanizing tank 1 to guide and support the edge of the first insulation cover 8. A collection box 13 is set below it. The guide wheels 12 change the sliding friction of the cover plate to rolling friction, making the movement lighter and more precise, and preventing the edge of the cover plate from being directly damaged by friction with the tank wall. The collection box 13 mainly collects the falling part of the first insulation cover 8 when it moves to both sides. This avoids the excessive suspended length outside the galvanizing tank 1, which would result in excessive gravitational potential energy and prevent the reset spring 15 from being unable to move the first insulation cover 8 during subsequent reset. The gravity generated by the first insulation cover 8 suspended on the outside helps to provide a certain pulling force when the first insulation cover 8 moves to both sides, allowing it to fall smoothly.

[0056] Furthermore, the scraping part 10 is hinged to the second heat insulation cover 9. The scraping part 10 is mesh-shaped, and the length of the scraping part 10 is adapted to the width of the galvanizing tank 1. The included angle between the scraping part 10 and the second heat insulation cover 9 is between 90° and 180°.

[0057] Specifically, such as Figure 8As shown, the scraper is not a solid plate, but a mesh grid with regular holes (such as squares or rhombuses). When the grid moves across the surface of the molten zinc, the liquid zinc can partially pass through the mesh, while the solid zinc ash (zinc oxide) is blocked and pushed forward due to its size and surface tension, creating a combined effect of screening and scraping. Compared to a solid plate, the mesh plate experiences significantly reduced fluid resistance when moving through the viscous molten zinc. A solid plate, like a piston, pushes the molten zinc forward, easily generating zinc waves that may stir up the zinc dross at the bottom. The mesh plate allows partial passage of molten zinc, greatly reducing surface fluctuations, achieving stable flow and scraping, and avoiding secondary pollution.

[0058] The connection between the scraping part 10 and the second insulation cover 9 is hinged, which can be achieved through a damping shaft.

[0059] When the included angle is 90°, the scraper part 10 faces the zinc ash vertically, resulting in the strongest scraping force, which is suitable for scraping off thick and hardened ash layers. When the included angle is 180°, the scraper part 10 is flat against the liquid surface, which has the best effect on filtering and collecting fine floating ash and minimizes disturbance to the liquid surface. When the included angle is between 90° and 180°, the operator can adjust the angle to the optimal position at any time according to the properties of the zinc ash (dry or wet, thick or thin) and process requirements.

[0060] The hinged scraper 10 allows for a higher degree of contact between the contact surfaces when the two second insulation covers 9 are closed.

[0061] Furthermore, the bottom surface of the second heat-insulating cover 9 is inclined at the position where it contacts the top surface of the galvanizing tank 1. The top surface of the galvanizing tank 1 is provided with a top block 11 with a spherical top. The top block 11 supports the second heat-insulating cover 9. The second heat-insulating cover 9 is hinged to the corresponding two sliders 7. When the second heat-insulating cover 9 moves to the width side of the galvanizing tank 1, the height of the second heat-insulating cover 9 decreases, causing the scraping part 10 to contact the zinc liquid and scrape off the ash. Conversely, the height of the second heat-insulating cover 9 increases, causing the scraping part 10 to separate from the zinc liquid.

[0062] Specifically, such as Figure 1 and Figure 2As shown, the bottom surface of the second insulation cover 9 is inclined, and a spherical top block 11 (which can be regarded as a roller) is installed at the corresponding position on the top surface of the galvanizing tank 1. The second insulation cover 9 and the slider 7 are hinged. In the initial state, the second insulation cover 9 and the scraper 10 are located above the center of the galvanizing tank 1. At this time, the highest point of its inclined surface is on the spherical top block 11, so that the entire second insulation cover 9 and the scraper 10 are in the highest position, and the scraper 10 is completely detached from the zinc liquid surface. When the slider 7 is driven to move towards the edge of the tank, the hinged second insulation cover 9 is pulled. Since the bottom surface is inclined, during the sliding process, the contact point between the inclined surface and the fixed spherical top block 11 continuously moves from the high point to the low point, causing the second insulation cover 9 to pitch and rotate around its hinge point with the slider 7. The height of the end away from the slider 7 (connected to the scraper 10) begins to decrease and comes into contact with the zinc liquid surface, and scraping begins. The scraping depth slowly increases until it moves to the set position (such as the edge of the tank), when the inclined surface reaches the lowest point, and the scraper 10 just descends to the preset depth. The horizontal movement stops, and the scraping action is just completed. When the slider 7 returns to the center under the action of the return spring 15, the process is reversed. The slope slides back from the low point to the high point, and the second insulation cover 9 is lifted again by the top block 11.

[0063] The depth to which the scraper section 10 is immersed in the zinc liquid is mechanically determined by the slope of the inclined plane, the height of the dome block 11, and the horizontal stroke. When the scraper section 10 is not in operation, it is completely removed from the high temperature and corrosive zinc liquid environment, and its heating and corrosion time is reduced by more than 80%, and the material aging rate is greatly reduced.

[0064] Furthermore, the transmission support includes a force transmission rod 6 and a support frame 5. The support frame 5 is rectangular, and the length of the support frame 5 is not less than the width of the hanging frame 2. The force transmission rod 6 is hinged to the four corners of the support frame 5, and the lower end of the force transmission rod 6 is hinged to the four corresponding sliders 7.

[0065] Specifically, the rectangular support frame 5 is a rigid rectangular frame, and the force transmission rods 6 are four independent rigid rods, with their upper ends hinged to the four corners of the support frame 5 and their lower ends hinged to the four sliders 7 on both sides of the galvanizing tank 1.

[0066] When the hanging rack 2 drives the support frame 5 to descend vertically, since the length of the four force transmission rods 6 is fixed and the lower hinge point (slider 7) is restricted within the horizontal slide 14, the four rods will be forced to swing inward (towards the center of the pool). This horizontal component of the inward swinging force will precisely and synchronously push the four sliders 7 through the hinge point to move outward to both sides of the galvanizing pool 1.

[0067] A green matte galvanizing process for power transmission tower steel includes the following steps: S1: Hang several pieces of steel 4 to be galvanized on the bottom surface of the hanging rack 2. Lifting equipment 3 lifts the hanging rack 2 to the top of the galvanizing tank 1. Lifting equipment 3 lowers the hanging rack 2 until the bottom surface of the hanging rack 2 contacts the support frame 5. Note that the steel 4 should avoid the support frame 5. S2: The hanging rack 2 slowly descends. Under the weight of the hanging rack 2 and the steel 4, the support frame 5 is compressed and its height decreases. Consequently, the force transmission rod 6 is compressed, causing the angle between the force transmission rod 6 and the top surface of the galvanizing tank 1 to decrease. The force transmission rod 6 pushes the slider 7 to move to both sides of the galvanizing tank 1. The return springs 15 on both sides are compressed, and the return spring 15 in the middle is stretched, causing the two first insulation covers 8 to move to the width side of the galvanizing tank 1. At the same time, the two second insulation covers 9 in the middle also move to the width side of the galvanizing tank 1. The top area of ​​the galvanizing tank 1 changes from a blocked state to an open state. The inclined surfaces on both sides of the bottom surface of the second insulation cover 9 slide in cooperation with the top block 11. The height of the second insulation cover 9 decreases, causing the scraper part 10 to come into contact with the zinc liquid. At this time, the steel 4 has not yet come into contact with the zinc liquid. S3: The hanging rack 2 continues to move down, the distance between the two second insulation covers 9 gradually increases, the ash-scraping part scrapes the zinc ash on the surface of the zinc liquid until the area where the zinc ash is scraped can completely accommodate all the steel 4, the steel 4 descends to the position where it is about to contact the zinc liquid, at this time, the hanging rack 2 continues to move down until the steel 4 is completely immersed in the zinc liquid, at this time, the force transmission rod 6 is basically parallel to the top surface of the galvanizing tank 1 or has an acute angle; S4: After galvanizing is completed, the lifting equipment 3 slowly lifts the hanging rack 2 upwards. The lifting speed is matched with the rebound speed of the return spring 15. Under the action of the return spring 15, the slider 7 moves towards the middle of the galvanizing tank 1, which drives the first heat insulation cover 8 to move towards the middle of the galvanizing tank 1, gradually covering the areas on both sides of the galvanizing tank 1. At the same time, it also drives the second heat insulation cover 9 to move towards the middle. When the second heat insulation cover 9 moves towards the middle of the galvanizing tank 1, the height of the second heat insulation cover 9 increases, the height of the scraper part 10 rises and separates from the zinc liquid. The second heat insulation cover 9 gradually covers the middle area of ​​the galvanizing tank 1 until it is completely covered. The lifting equipment 3 then lifts the galvanized steel 4 to the designated position. S5: The galvanized steel is cooled to below 200°C and enters the passivation tank 19. The passivation tank 19 contains a green matte passivation coloring solution, which includes a chromium-free passivating agent, water-based silicone resin, TiO2 nanoparticles, and a dye. The pH value is 11.5, the soaking time is ≥3 minutes, and after being taken out, it is left to stand for 1 minute to form a dense green matte passivation film.

[0068] Specifically, the chromium-free passivating agent is designed specifically for hot-dip galvanized parts. It adheres firmly to the zinc layer surface, forming a dense protective film that effectively prevents corrosion and oxidation. The water-based silicone resin has excellent high-temperature resistance, increasing coating thickness and improving wear resistance and weather resistance, ensuring long-term stable operation. TiO2 nanoparticles have excellent hiding power, giving the coating a matte finish while filling and reinforcing the resin network structure, thus improving the overall performance of the coating. Figure 9 As shown, the existing aeration and stirring system needs to be designed and installed in the passivation tank 19. The aeration holes 21 of the aeration pipe 20 are arranged at a 45° angle to the lower side of the opening. It is recommended that the hole diameter be 6-8mm and the hole spacing be 20cm. When feeding for the first time, add 70%~80% clean water first, and then turn on the aeration system. Under the state of aeration and stirring of the tank liquid, add 1 ton of matte coloring liquid to 7 tons of clean water. Then add clean water and aerate and stir for more than 30 minutes. After the working liquid is fully stirred and uniform, the passivation tank can enter the coloring process. Turn on the aeration pump of the passivation tank 19 at least 30 minutes before coloring to ensure that the coloring working liquid is stirred evenly. The ideal reaction temperature of the coloring working liquid is about 60℃. Larger materials can be produced with higher liquid temperatures. Galvanized steel should be immersed in the passivation tank 19 for no less than 3 minutes (adjusted according to the liquid temperature and the temperature of the workpiece). When the workpiece enters or leaves the passivation tank 19, the aeration can be turned off briefly to reduce foam.

[0069] This invention, through the aforementioned mechanical linkage and process steps, achieves mandatory slag removal before plating, ensuring the basic quality of the plating layer. Slag removal precedes zinc immersion, avoiding cross-contamination and ensuring the quality of zinc plating. Opening the cover and slag removal are synchronized, requiring no additional time. When closed, the slag removal part 10 is above the liquid surface, preventing the slag removal part 10 from being submerged in the zinc liquid for a long time. The entire process involves automatic sealing, maximizing energy saving and suppressing zinc fumes. These effects are interconnected and work together to ultimately achieve the invention's objectives of improving zinc plating quality, reducing overall costs, and improving the working environment.

[0070] It should be noted that in high-altitude areas with thin air, three core characteristics lead to significant light pollution issues associated with conventional hot-dip galvanizing: First, high atmospheric transparency and weak light scattering result in long-distance and high-intensity light reflection from the towers; second, excellent air quality and low levels of corrosive gases mean the galvanized layer corrodes at only 1 / 5 to 1 / 8 the rate in plains areas, maintaining its silvery-white high-gloss appearance for 15-20 years, resulting in prolonged light pollution; third, over 3000 hours of sunshine per day and solar radiation intensity more than 50% higher than in plains areas, further amplifying the impact of light pollution. Power towers with a green matte passivation film (gloss level ≤18GU) can blend seamlessly with the surrounding environment, reducing visual jarring and significantly lowering light reflection intensity, thus meeting the requirements of high-altitude environments.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A green matte galvanizing device for power transmission tower steel, comprising a galvanizing device body installed above a galvanizing bath (1), characterized in that, The galvanizing bath (1) is provided with a passivation bath (19) on the rear side for depositing a green matte passivation film on the surface of the galvanized steel. The passivation bath (19) contains a green matte passivation coloring solution. The galvanizing device body includes: The hanging rack (2) is used to connect with the lifting equipment (3) to realize the transfer and galvanizing of steel (4); The sliding spring section is arranged on both sides of the galvanizing tank (1) and can slide relative to the galvanizing tank (1) to adapt to the lifting of the hanging rack (2); The sealing part is connected to the sliding spring part and spans across the galvanizing tank (1). It is used to follow the movement of the sliding spring part to cover or open the top of the galvanizing tank (1). During galvanizing operation, the top of the galvanizing tank (1) is open, and during non-galvanizing operation, the top of the galvanizing tank (1) is covered. The scraping part (10) is located at one end of the sealing part and is used to scrape the zinc ash on the surface of the zinc liquid when it moves with the sealing part. The transmission support part is hinged to the sliding spring part and is used to support the hanging rack (2). During the descent of the hanging rack (2), the sliding spring part is pushed to move the cover part to both sides of the galvanizing pool (1), so that the top of the galvanizing pool (1) changes from the blocked state to the open state. At the same time, the cover part drives the scraper part (10) to scrape off the zinc ash on the surface of the zinc liquid. The lifting equipment (3) transports the cooled galvanized steel to a passivation pool containing green matte passivation coloring liquid for immersion. After taking it out, it is left to stand for 1 minute to form a dense green matte passivation film on the surface of the galvanized steel.

2. The green matte galvanizing device for power transmission tower steel according to claim 1, characterized in that, The sliding rebound part includes a slider (7), a guide rod (16), and a reset spring (15). The slider (7) is slidably embedded on the top length side of the galvanizing tank (1). The two ends of the guide rod (16) are respectively connected to the width side of the galvanizing tank (1). The guide rod (16) passes through the slider (7). The reset spring (15) is located on the side of the slider (7). The slider (7) is connected to the cover part. The scraper part (10) is set at one end of the cover part away from the width side of the galvanizing tank (1). The lower end of the transmission support part is hinged to the slider (7), and the upper end is in contact with the hanging rack (2).

3. The green matte galvanizing device for power transmission tower steel according to claim 2, characterized in that, Two sliders (7) are distributed on the same side of the galvanizing pool (1). The long side of the galvanizing pool (1) is provided with a groove (14) that is compatible with the sliders (7). The guide rod (16) and the return spring (15) are both located in the groove (14). The return spring (15) is sleeved on the guide rod (16), and the return spring (15) is located between the two sliders (7) on the same side and between the slider (7) and the width side of the galvanizing pool (1).

4. The green matte galvanizing device for power transmission tower steel according to claim 3, characterized in that, The top of the chute (14) is provided with a flexible heat-resistant cloth (17). The flexible heat-resistant cloth (17) is located between the two sliders (7) on the same side and between the slider (7) and the width side of the galvanizing pool (1). The flexible heat-resistant cloth (17) unfolds or retracts as the slider (7) moves to achieve dynamic sealing of the opening of the chute (14).

5. The green matte galvanizing device for power transmission tower steel according to claim 3, characterized in that, The sealing part includes a first heat-insulating cover (8) and a second heat-insulating cover (9) spanning the top of the galvanizing tank (1). One end of the first heat-insulating cover (8) is connected to two sliders (7) in the width direction of the galvanizing tank (1), and the other end extends to the outside of the galvanizing tank (1). The second heat-insulating cover (9) is connected to two sliders (7) in the width direction of the galvanizing tank (1), and the other end is connected to the scraper (10). The first heat-insulating cover (8) and the second heat-insulating cover (9) are symmetrically distributed about the axis in the width direction of the galvanizing tank (1).

6. The green matte galvanizing device for power transmission tower steel according to claim 5, characterized in that, The first heat-insulating cover (8) includes multiple heat-insulating strips (801). Two adjacent heat-insulating strips (801) are connected by ceramic fiber braided strips (802). The bottom surface of the first heat-insulating cover (8) is provided with an X-shaped telescopic frame (18). One end of the telescopic frame (18) is connected to the width side of the galvanizing tank (1), and the other end is connected to the corresponding two sliders (7). The telescopic frame (18) supports the first heat-insulating cover (8). The side wall of the galvanizing tank (1) is provided with guide wheels (12) that contact the first heat-insulating cover (8). Below the guide wheels (12) is a collection box (13) for collecting the first heat-insulating cover (8).

7. The green matte galvanizing device for power transmission tower steel according to claim 6, characterized in that, The scraper (10) is hinged to the second insulation cover (9). The scraper (10) is grid-shaped. The length of the scraper (10) is adapted to the width of the galvanizing tank (1). The included angle between the scraper (10) and the second insulation cover (9) is between 90° and 180°.

8. The green matte galvanizing device for power transmission tower steel according to claim 7, characterized in that, The bottom surface of the second heat-insulating cover (9) is in contact with the top surface of the galvanizing tank (1) at an angle. The top surface of the galvanizing tank (1) is provided with a top block (11) with a spherical top. The top block (11) supports the second heat-insulating cover (9). The second heat-insulating cover (9) is hinged to the corresponding two sliders (7). When the second heat-insulating cover (9) moves to the width side of the galvanizing tank (1), the height of the second heat-insulating cover (9) decreases, causing the scraping part (10) to contact the zinc liquid and scrape the ash. Conversely, the height of the second heat-insulating cover (9) increases, causing the scraping part (10) to separate from the zinc liquid.

9. A green matte galvanizing device for power transmission tower steel according to claim 8, characterized in that, The transmission support includes a force transmission rod (6) and a support frame (5). The support frame (5) is rectangular and its length is not less than the width of the hanging rack (2). The force transmission rod (6) is hinged to the four corners of the support frame (5), and the lower end of the force transmission rod (6) is hinged to the four corresponding sliders (7).

10. A green matte galvanizing process for power transmission tower steel, comprising the green matte galvanizing apparatus for power transmission tower steel as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Hang several steel materials (4) to be galvanized on the bottom surface of the hanging rack (2), and lift the hanging rack (2) to the top of the galvanizing tank (1) with the lifting equipment (3). Lower the lifting equipment (3) until the bottom surface of the hanging rack (2) contacts the support frame (5). Note that the steel materials (4) should avoid the support frame (5). S2: The hanging rack (2) slowly descends. Under the weight of the hanging rack (2) and the steel (4), the support frame (5) is compressed and its height decreases. As a result, the force transmission rod (6) is compressed, making the angle between the force transmission rod (6) and the top surface of the galvanizing tank (1) smaller. The force transmission rod (6) pushes the slider (7) to move to both sides of the galvanizing tank (1). The return springs (15) on both sides are compressed, and the return spring (15) in the middle is stretched, causing the two first insulation covers (8) to move to the width side of the galvanizing tank (1). At the same time, the two second insulation covers (9) in the middle also move to the width side of the galvanizing tank (1). The top area of ​​the galvanizing tank (1) changes from a blocked state to an open state. The inclined surfaces on both sides of the bottom surface of the second insulation cover (9) slide in cooperation with the top block (11). The height of the second insulation cover (9) decreases, causing the scraper (10) to come into contact with the zinc liquid. At this time, the steel (4) has not yet come into contact with the zinc liquid. S3: The hanging rack (2) continues to move down, and the distance between the two second insulation covers (9) gradually increases. The ash-scraping part scrapes the zinc ash off the surface of the zinc liquid until the area where the zinc ash is scraped can completely accommodate all the steel (4). The steel (4) then descends to the position where it is about to contact the zinc liquid. At this time, the hanging rack (2) continues to move down until the steel (4) is completely submerged in the zinc liquid. At this time, the force transmission rod (6) is basically parallel to the top surface of the galvanizing pool (1) or has an acute angle. S4: After galvanizing is completed, the lifting equipment (3) slowly lifts the hanging rack (2) upwards. The lifting speed is matched with the rebound speed of the return spring (15). The slider (7) moves towards the middle of the galvanizing pool (1) under the action of the return spring (15), which drives the first heat insulation cover (8) to move towards the middle of the galvanizing pool (1) and gradually covers the areas on both sides of the galvanizing pool (1). At the same time, it also drives the second heat insulation cover (9) to move towards the middle. When the second heat insulation cover (9) moves towards the middle of the galvanizing pool (1), the height of the second heat insulation cover (9) increases, and the height of the scraper (10) rises and separates from the zinc liquid. The second heat insulation cover (9) gradually covers the middle area of ​​the galvanizing pool (1) until it is completely covered. The lifting equipment (3) lifts the galvanized steel (4) to the designated position. S5: The galvanized steel is cooled to below 200°C and enters the passivation tank (19). The passivation tank (19) contains a green matte passivation coloring solution, which includes a chromium-free passivating agent, water-based silicone resin, TiO2 nanoparticles, and a dye. The pH value is 11.5, the soaking time is ≥3 minutes, and after taking it out, it is left to stand for 1 minute to form a dense green matte passivation film.

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