A galvanizing device suitable for steel structural components

Abstract

This invention belongs to the field of steel strip galvanizing technology, and particularly to a galvanizing device suitable for steel structural components. It includes a galvanizing tank, a movable seat above the galvanizing tank, and a lifting mechanism on the outer wall of the galvanizing tank for driving the movable seat up and down. A rotating shaft is rotatably connected to the top of the movable seat via a bearing, and a rotating seat is fixed to the bottom of the rotating shaft. This invention, by incorporating a galvanizing tank, movable seat, lifting mechanism, rotating shaft, rotating seat, bevel gear disc, cylinder, filter bucket, rotating paddle, spiral blade, gear ring, transmission gear, transmission shaft, bevel gear, reciprocating rod, guide block, striking plate, and collection bucket, allows for the collection of zinc dross precipitated inside the galvanizing tank and zinc dross floating on the surface of the molten zinc liquid within the filter bucket.

Description

Technical Field

[0001] This invention relates to the field of steel strip galvanizing technology, specifically to a galvanizing apparatus suitable for steel structural components. Background Technology

[0002] Galvanized steel strip is made by coating long, narrow strips of cold-rolled or hot-rolled steel with a layer of zinc to varying degrees. Hot-dip galvanizing has advantages such as uniform coating, strong adhesion, and long service life. The hot-dip galvanized steel strip substrate undergoes complex physical and chemical reactions with the molten galvanizing solution to form a corrosion-resistant, tightly structured zinc-iron alloy layer. This alloy layer is integrated with the pure zinc layer and the steel strip substrate, resulting in strong corrosion resistance. Therefore, steel structural components made from this steel strip have strong corrosion resistance and are more aesthetically pleasing. However, currently, when using galvanizing equipment to process steel strips into structural components, zinc dross is generated on the surface and inside the zinc bath during galvanizing. The dross is currently removed by workers using tools such as scoops, which is time-consuming and labor-intensive, and the scoops also carry a large amount of molten zinc with them, resulting in waste. Therefore, we propose a galvanizing device suitable for steel structural components to solve the above problems. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a galvanizing device suitable for steel structural components, solving the problems mentioned in the background section.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] A galvanizing apparatus suitable for steel structural components includes a galvanizing tank. A movable base is disposed above the galvanizing tank. A lifting mechanism for driving the movable base to move up and down is disposed on the outer wall of the galvanizing tank. A rotating shaft is rotatably connected to the top of the movable base via a bearing. A rotating seat is fixed to the bottom end of the rotating shaft. A bevel gear disk is fixed to the bottom of the rotating seat. A cylindrical body is fixed inside the bevel gear disk. An arc-shaped inlet is formed in a circular array on the surface of the cylindrical body. The bottom end of the cylindrical body extends into the interior of the galvanizing tank and is fixed with a filter bucket. A rotating paddle is disposed above the filter bucket and fixed to the surface of the cylindrical body. A helical blade is rotatably connected to the interior of the cylindrical body via a bearing. A toothed ring is fixed inside a groove formed at the top of the bevel gear disk. A transmission gear is fixed to the surface of the helical blade. The gear ring meshes with the transmission gear. Both sides of the movable seat are rotatably connected to a transmission shaft via bearings. One end of each transmission shaft is fixed with a bevel gear, which meshes with a bevel gear disc. One side wall of each bevel gear is movably connected to a reciprocating rod via a T-shaped shaft. Guide blocks adapted to the reciprocating rods are fixed to both inner walls of the movable seat. The reciprocating rods slide on corresponding guide blocks. A striking plate, cooperating with the two reciprocating rods, is fixed to the surface of the cylinder. Two collection hoppers are fixedly connected to the outer wall of the cylinder. A sealing assembly is provided on one side wall of each collection hopper. A cooling assembly for rapidly cooling the zinc slag collected inside the two collection hoppers is provided at the top of the movable seat. Arc-shaped filter screens are fixed inside the two openings on the surface of the cylinder.

[0008] Furthermore, the lifting mechanism includes a mounting frame fixed to the outer wall of the galvanizing tank. Two lead screws are rotatably connected between the upper and lower inner walls of the mounting frame via bearings. The movable seat is threaded onto the surface of the two lead screws. Two connecting shafts are rotatably connected to the top of the mounting frame via bearings. Chain gears are fixed to the surfaces of the two lead screws and the two connecting shafts. The four chain gears are connected by chain drive.

[0009] Furthermore, the sealing assembly includes a mounting frame fixed to one side wall of the collection hopper, a baffle is inserted into a slot at the top of the mounting frame, two cathode magnetic strips are fixed on the baffle, and two anode magnetic strips are fixed on the top of the collection hopper, with the cathode magnetic strips attracting the corresponding anode magnetic strips respectively.

[0010] Furthermore, the cooling assembly includes a housing fixed to the top of the movable base by two U-shaped frames. Each of the two air outlet ducts of the housing is equipped with an inlet one-way valve. Four openings on the surface of the housing each contain a heat sink. A semiconductor cooling chip is fixed to one side wall of each heat sink. Piston cylinders are fixed to both side walls of the movable base. One-way valves are installed on the air outlet ducts of each piston cylinder. The other ends of the two air outlet ducts on the housing are respectively connected and fixed to the air inlet ends of the corresponding piston cylinders. A T-shaped piston slides through the top of each piston cylinder. A Z-shaped plate is fixed to the top of each T-shaped piston. The Z-shaped plates are respectively fixed to the surfaces of the corresponding reciprocating rods. A square frame is fixed to the opening at the top of the collection hopper. A blower plate is fixed inside each square frame. Lower semi-annular pipes are connected and fixed to the inlet ducts of the two blower plates. Upper semi-annular pipes adapted to the lower semi-annular pipes are connected and fixed to the air outlet ducts of the two piston cylinders. The upper semi-annular pipes and lower semi-annular pipes are tightly fitted and rotatably connected.

[0011] Furthermore, the interior of the housing is fixed with two sets of guide ramps for slowing down the incoming air.

[0012] Furthermore, an annular seat is fixed at the air inlet of the housing, and a circular filter screen is fixed inside the annular seat.

[0013] Furthermore, a scraper adapted to the filter bucket is fixed to the surface of the cylinder, and the scraper rotates inside the filter bucket.

[0014] Furthermore, an annular rail is fixed inside the top of the movable seat, and an annular plate adapted to the annular rail is fixed on the top of the bevel gear disc.

[0015] Furthermore, two reinforcing plates are fixed to the outer wall of the cylinder, and the other end of each reinforcing plate is fixedly connected to a corresponding collecting hopper.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a galvanizing device suitable for steel structural components, which has the following advantages:

[0018] This invention, through the configuration of a galvanizing tank, a movable seat, a lifting mechanism, a rotating shaft, a rotating seat, a bevel gear disc, a cylinder, a filter bucket, a rotating paddle, a spiral blade, a gear ring, a transmission gear, a transmission shaft, a bevel gear, a reciprocating rod, a guide block, a striking plate, and a collection bucket, utilizes a galvanizing device for steel structural components. By installing a filter bucket inside the galvanizing tank, the lifting mechanism drives the cylinder and filter bucket upwards, collecting the zinc dross deposited inside the galvanizing tank and the zinc dross floating on the surface of the molten zinc in the filter bucket. When the cylinder drives the collection bucket to rotate, the centrifugal force and the striking action of the reciprocating rod concentrate the zinc dross inside the filter bucket to its center. Then, the synchronously rotating spiral blades move the concentrated zinc dross upwards and transport it to the collection bucket for collection. This automatically completes the dross removal work inside the galvanizing tank, greatly reducing the labor intensity of workers.

[0019] This invention incorporates a sealing component and a cooling component. The sealing component blocks the discharge port of the collection hopper, making it easy to open and close, thus facilitating the cleaning of zinc dross collected inside the hopper. The cooling component continuously cools the zinc dross collected inside the hopper, as high-temperature zinc dross may produce smoke and odors, affecting the cleanliness of the working environment. Rapid heat dissipation from the zinc dross reduces these adverse effects, and the cooled zinc dross is easier for workers to clean later. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the cylindrical structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the movable seat structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the box structure of the present invention;

[0025] Figure 6 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0026] In the diagram: 1. Galvanizing tank body; 2. Movable seat; 3. Lifting mechanism; 301. Mounting frame; 302. Lead screw; 303. Connecting shaft; 304. Sprocket; 305. Chain; 4. Rotating shaft; 5. Rotating seat; 6. Bevel gear disc; 7. Cylinder; 8. Filter hopper; 9. Rotating paddle; 10. Spiral blade; 11. Gear ring; 12. Transmission gear; 13. Transmission shaft; 14. Bevel gear; 15. Reciprocating rod; 16. Guide block; 17. Striking plate; 18. Collection hopper; 19. Sealing assembly; 1901. Mounting frame; 1902. Baffle; 19 03. Cathode magnetic strip; 1904. Anode magnetic strip; 20. Cooling assembly; 2001. Housing; 2002. Heat sink; 2003. Semiconductor cooling chip; 2004. Piston cylinder; 2005. T-type piston; 2006. Z-type plate; 2007. Square frame; 2008. Air blower; 2009. Lower half-annular tube; 2010. Upper half-annular tube; 2011. Guide plate; 2012. Annular seat; 2013. Circular filter screen; 21. Arc-shaped filter screen; 22. Scraper; 23. Annular rail; 24. Annular plate; 25. Reinforcing plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, an embodiment of the present invention provides a galvanizing device suitable for steel structural components, including a galvanizing tank 1, a movable seat 2 disposed above the galvanizing tank 1, an annular rail 23 fixed inside the top of the movable seat 2, and an annular plate 24 adapted to the annular rail 23 fixed on the top of the bevel gear disk 6, which can provide auxiliary support for the movable seat 2 to make it more stable during rotation. The outer wall of the galvanizing tank 1 is provided with a lifting mechanism 3 for driving the movable seat 2 to move up and down. The top of the movable seat 2 is rotatably connected to a rotating shaft 4 through a bearing, and a rotating seat 5 is fixed to the bottom end of the rotating shaft 4. A bevel gear disk 6 is fixed to the bottom of the rotating seat 5, and a cylinder 7 is fixed inside the bevel gear disk 6. The surface of the cylinder 7 has an arc-shaped inlet arranged in an annular array, and the bottom of the cylinder 7... The end extends into the interior of the galvanizing tank 1 and is fixed with a filter bucket 8. Above the filter bucket 8, a rotating paddle 9 is fixed to the surface of the cylinder 7. Inside the cylinder 7, a spiral blade 10 is rotatably connected via bearings. A gear ring 11 is fixed inside the settling groove at the top of the bevel gear disk 6. A transmission gear 12 is fixed to the surface of the spiral blade 10. The gear ring 11 meshes with the transmission gear 12. Both sides of the movable seat 2 are rotatably connected to a transmission shaft 13 via bearings. One end of each transmission shaft 13 is fixed with a bevel gear 14, which meshes with the bevel gear disk 6. One side wall of each bevel gear 14 is movably connected to a reciprocating rod 15 via a T-shaped shaft. Both sides of the inner wall of the movable seat 2 are fixed with guide blocks 16 that are adapted to the reciprocating rod 15. The reciprocating rod 15 slides on the opposite sides. On the guide block 16, a striking plate 17 is fixed to the surface of the cylinder 7 to cooperate with two reciprocating rods 15. Two collection hoppers 18 are fixedly connected to the outer wall of the cylinder 7, and two reinforcing plates 25 are fixed to the outer wall of the cylinder 7. The other end of the reinforcing plate 25 is fixedly connected to the corresponding collection hopper 18, which can provide auxiliary support for the collection hopper 18 so that it will be more stable after being fixed. A sealing component 19 is provided on one side wall of each collection hopper 18. A cooling component 20 is provided on the top of the moving seat 2 for rapidly cooling the zinc dross collected inside the two collection hoppers 18. An arc-shaped filter screen 21 is fixed inside the two openings on the surface of the cylinder 7. When using this galvanizing device suitable for steel structural parts, it is mainly used to galvanize steel strips before they are processed into steel structures. During the galvanizing process, the steel strip can be moved from either side of the cylinder 7 inside the galvanizing tank 1 for galvanizing. A motor can be started to rotate the cylinder 7, which in turn rotates the filter hopper 8 and the rotating paddle 9. The rotation of the paddle 9 continuously agitates the zinc liquid, preventing zinc dross from forming a stable layer on the surface and reducing its accumulation. As the paddle 9 rotates, the spiral blades 10 collect some of the zinc dross concentrated in the center of the filter hopper 8 into the collection hopper 18. Simultaneously, as the zinc dross rises, the zinc liquid also rises. After reaching the arc-shaped filter screen 21, the zinc liquid flows back into the galvanizing tank 1.This prevents the zinc slag from entering the collection hopper 18. Later, when cleaning the zinc slag inside the galvanizing tank 1, the lifting mechanism 3 can be activated to move the moving seat 2 upwards. This upward movement of the moving seat 2 will move the cylinder 7 and the filter hopper 8 upwards, allowing the zinc slag inside the galvanizing tank 1 to be filtered and moved upwards. Then, the motor can be activated to rotate the rotating shaft 4. The rotation of the rotating shaft 4 will then rotate the rotating seat 5 and the bevel gear disc 6. The rotation of the bevel gear disc 6 will then rotate the cylinder 7. This rotation of the cylinder 7 will then rotate the filter hopper 8, accelerating the separation of the zinc slag from the molten zinc. Furthermore, the rotation of the bevel gear disc 6 will simultaneously drive the bevel gear 14 to rotate. With the cooperation of the guide block 16, the bevel gear 14 will drive the reciprocating rod 15 to move up and down. The two reciprocating rods 15 will repeatedly strike the striking plate 17 fixed to the surface of the cylinder 7, generating vibration. This will further accelerate the separation of the zinc slag from the molten zinc inside the filter hopper 8. The separation speed of the zinc liquid is improved, and it also helps to slide and concentrate the zinc dross collected inside the filter hopper 8 to its center position. This avoids the zinc dross carrying a large amount of zinc liquid, thus preventing waste. Finally, when the conical toothed disc 6 rotates, it also drives the toothed ring 11 to rotate. The rotation of the toothed ring 11 drives the transmission gear 12 to rotate, which in turn drives the spiral blades 10 to rotate. At this time, the zinc dross collected at the center of the filter hopper 8 is collected inside the collection hopper 18. During the transmission process, because the toothed ring 11 has more teeth than the transmission gear 12, the rotation speed of the transmission gear 12 is faster than that of the toothed ring 11. Therefore, the rotation speed of the spiral blades 10 is greater than that of the cylinder 7. Thus, the spiral blades 10 can effectively push the zinc dross upward inside the cylinder 7. Vent holes are provided on the back of both collection hoppers 18 to discharge the used air, but these vent holes are not shown in the figure.

[0030] like Figure 1 As shown, in some embodiments, the lifting mechanism 3 includes a mounting frame 301 fixed to the outer wall of the galvanizing tank 1. Two lead screws 302 are rotatably connected between the upper and lower inner walls of the mounting frame 301 via bearings. The movable seat 2 is threadedly connected to the surface of the two lead screws 302. Two connecting shafts 303 are rotatably connected to the top of the mounting frame 301 via bearings. Sprockets 304 are fixed to the surfaces of the two lead screws 302 and the two connecting shafts 303. The four sprockets 304 are connected by a chain 305. In use, the motor is started to drive one of the lead screws 302 to rotate. Then, with the cooperation of the connecting shafts 303, sprockets 304 and chain 305, the two lead screws 302 can be driven to rotate synchronously at the same time, so as to save production costs. Finally, after the two lead screws 302 rotate, the movable seat 2 can move up and down.

[0031] like Figure 3 and Figure 6As shown, in some embodiments, the sealing assembly 19 includes a mounting frame 1901 fixed to one side wall of the collection hopper 18. A baffle 1902 is inserted into a slot at the top of the mounting frame 1901. Two cathode magnetic strips 1903 are fixed on the baffle 1902. Two anode magnetic strips 1904 are fixed at the top of the collection hopper 18. The cathode magnetic strips 1903 are attracted to the corresponding anode magnetic strips 1904. In use, the baffle 1902 is pulled out and separated from the mounting frame 1901, and then the zinc dross collected inside the collection hopper 18 can be cleaned. With the cooperation of the cathode magnetic strips 1903 and anode magnetic strips 1904, the baffle 1902 is more stable after being inserted into the mounting frame 1901.

[0032] like Figure 2 , Figure 3 and Figure 5As shown, in some embodiments, the cooling assembly 20 includes a housing 2001 fixed to the top of the movable base 2 by two U-shaped brackets. An annular seat 2012 is fixed at the air inlet of the housing 2001, and a circular filter screen 2013 is fixed inside the annular seat 2012. With the cooperation of the annular seat 2012 and the circular filter screen 2013, dust and lint in the outside air can be prevented from entering the housing 2001 through the air inlet. One-way valves are installed on the two air outlet pipes of the housing 2001. Heat sinks 2002 are fixed inside the four openings on the surface of the housing 2001. One side wall of the heat sink 2002... Each component is fixed with a semiconductor cooling chip 2003. Piston cylinders 2004 are fixed to both sides of the movable base 2. One-way valves are installed on the air outlet pipes of the piston cylinders 2004. The other ends of the two air outlet pipes on the housing 2001 are respectively connected and fixed to the air inlet ends of the corresponding piston cylinders 2004. T-shaped pistons 2005 slide through the top of each piston cylinder 2004. Z-shaped plates 2006 are fixed to the top of each T-shaped piston 2005. The Z-shaped plates 2006 are respectively fixed to the surface of the corresponding reciprocating rods 15. Square frames 2007 are fixed to the openings at the top of the collection hopper 18. Air blowing plates 200 are fixed inside the square frames 2007. 8. A lower semi-annular pipe 2009 is fixedly connected to the inlet pipes of the two blower plates 2008. An upper semi-annular pipe 2010, compatible with the lower semi-annular pipe 2009, is fixedly connected to the outlet pipes of the two piston cylinders 2004. The upper semi-annular pipe 2010 and the lower semi-annular pipe 2009 are tightly fitted and rotatably connected. In use, when the two reciprocating rods 15 move up and down, they will drive the Z-shaped plate 2006 to move. After the Z-shaped plate 2006 moves, it can drive the T-shaped piston 2005 to move up and down inside the piston cylinder 2004. When the T-shaped piston 2005 moves upward inside the piston cylinder 2004, it can draw outside air into the housing 200. Inside the casing 1, external air enters the casing 2001 and is cooled by the internal semiconductor cooling chip 2003. The cooled air then enters the piston cylinder 2004. When the T-shaped piston 2005 moves down inside the piston cylinder 2004, it sends the cooled air to the blower plate 2008 and blows it out. This cools the zinc dross collected inside the collection hopper 18. Furthermore, the cooperation between the lower half-annular pipe 2009 and the upper half-annular pipe 2010 ensures that the blower plate 2008 does not affect the delivery of cooled air while rotating with the collection hopper 18.

[0033] like Figure 5As shown, in some embodiments, two sets of guide ramps 2011 for slowing down the incoming air are fixed inside the housing 2001. When external air enters the housing 2001, the guide ramps 2011 can extend the flow time of the external air inside the housing 2001, so as to cool the external air more thoroughly.

[0034] like Figure 2 As shown, in some embodiments, a scraper 22 adapted to the filter hopper 8 is fixed on the surface of the cylinder 7. The scraper 22 rotates inside the filter hopper 8. During the cleaning of zinc dross, the rotatable scraper 22 can scrape the zinc dross filtered inside the filter hopper 8 so that the zinc dross can slide down to its center more quickly.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A galvanizing device suitable for steel structural members, comprising a galvanizing bath body (1), characterized in that: The upper part of the galvanizing pool body (1) is provided with a moving seat (2), the outer wall of the galvanizing pool body (1) is provided with a lifting mechanism (3) for driving the moving seat (2) to move up and down, the top of the moving seat (2) is rotatably connected with a rotating shaft (4) through a bearing, the bottom end of the rotating shaft (4) is fixedly connected with a rotating seat (5), the bottom of the rotating seat (5) is fixedly connected with a bevel gear (6), the inside of the bevel gear (6) is fixedly connected with a cylinder (7), the surface of the cylinder (7) is annularly arranged with arc-shaped inlets, the bottom end of the cylinder (7) extends into the inside of the galvanizing pool body (1) and is fixedly connected with a filter hopper (8), the upper part of the filter hopper (8) is provided with a rotating paddle (9) fixed on the surface of the cylinder (7), the inside of the cylinder (7) is rotatably connected with a spiral blade (10) through a bearing, the inside of the sink groove arranged on the top of the bevel gear (6) is fixedly connected with a gear ring (11), the surface of the spiral blade (10) is fixedly connected with a transmission gear (12), the gear ring (11) is meshingly connected with the transmission gear (12), the two side walls of the moving seat (2) are rotatably connected with a transmission shaft (13) through a bearing, one end of the transmission shaft (13) is fixedly connected with a bevel gear (14), the bevel gear (14) is meshingly connected with the bevel gear (6), one side wall of the bevel gear (14) is movably connected with a reciprocating rod (15) through a T-shaped shaft, the two side inner walls of the moving seat (2) are fixedly connected with guide blocks (16) matched with the reciprocating rods (15), the reciprocating rods (15) are respectively slid on the corresponding guide blocks (16), the surface of the cylinder (7) is fixedly connected with a knocking plate (17) matched with the two reciprocating rods (15) for use, the outer wall of the cylinder (7) is fixedly connected with two collecting hoppers (18), one side wall of each of the collecting hoppers (18) is provided with a blocking assembly (19), the blocking assembly (19) comprises an installation frame (1901) fixed on one side wall of the collecting hopper (18), a baffle (1902) is inserted into the slot arranged on the top of the installation frame (1901), two cathode magnetic strips (1903) are fixed on the baffle (1902), two anode magnetic strips (1904) are fixed on the top of the collecting hopper (18), the cathode magnetic strips (1903) are respectively attracted to the corresponding anode magnetic strips (1904), the top of the moving seat (2) is provided with a cooling assembly (20) for rapidly cooling the zinc residues collected in the two collecting hoppers (18), the cooling assembly (20) comprises a box body (2001) fixed on the top of the moving seat (2) through two U-shaped frames, air inlet one-way valves are installed on the two air outlet pipelines of the box body (2001), four through holes arranged on the surface of the box body (2001) are fixedly connected with heat dissipation blocks (2002), one side wall of each of the heat dissipation blocks (2002) is fixedly connected with a semiconductor refrigeration fin (2003), the two side walls of the moving seat (2) are fixedly connected with piston cylinders (2004), air outlet one-way valves are installed on the air outlet pipelines of the piston cylinders (2004),The other end of two air outlet pipes on the box (2001) is communicated and fixed with the air inlet hole end of the corresponding piston cylinder (2004) respectively, the top of the piston cylinder (2004) is slidably penetrated by a T-shaped piston (2005), the top end of the T-shaped piston (2005) is fixed with a Z-shaped plate (2006) respectively, the Z-shaped plate (2006) is fixed on the surface of the corresponding reciprocating rod (15) respectively, the through opening on the top of the collecting hopper (18) is fixed with a square frame (2007) respectively, the inside of the square frame (2007) is fixed with a blowing plate (2008) respectively, the inlet pipe on two blowing plates (2008) is communicated and fixed with a lower half ring pipe (2009), the air outlet pipe on two piston cylinders (2004) is communicated and fixed with an upper half ring pipe (2010) matched with the lower half ring pipe (2009), the upper half ring pipe (2010) is closely attached with the lower half ring pipe (2009) and is rotationally connected, the two through openings on the surface of the cylinder body (7) are fixed with arc-shaped filter screens (21) respectively.

2. A galvanizing apparatus for steel structural members as claimed in claim 1, wherein: The lifting mechanism (3) comprises a mounting frame (301) fixed to the outer wall of the galvanizing tank body (1), two lead screws (302) are rotatably connected between the upper and lower inner walls of the mounting frame (301) through bearings, the moving seat (2) is threadedly connected to the surfaces of the two lead screws (302), two connecting shafts (303) are rotatably connected to the top of the mounting frame (301) through bearings, chain gears (304) are fixed to the surfaces of the two lead screws (302) and the two connecting shafts (303), and four chain gears (304) are drivingly connected through a chain (305).

3. A galvanizing apparatus for steel structural members as defined in claim 1, wherein: The inside of the box body (2001) is fixed with two groups of guide inclined plates (2011) for slowing down the entering air.

4. The galvanizing apparatus for steel structural members according to claim 1, wherein: An annular seat (2012) is fixed at the air inlet of the box body (2001), and a circular filter screen (2013) is fixed in the annular seat (2012).

5. The galvanizing apparatus for steel structural members according to claim 1, wherein: The surface of the cylinder (7) is fixed with a scraper (22) matched with the filter hopper (8), and the scraper (22) rotates in the filter hopper (8).

6. A galvanizing apparatus for steel structural members as defined in claim 1 wherein: The top of the moving seat (2) is internally fixed with an annular rail (23), and the top of the bevel gear disc (6) is fixed with an annular plate (24) matched with the annular rail (23).

7. A galvanizing apparatus for steel structural members as defined in claim 1, wherein: The outer wall of the cylinder (7) is fixed with two reinforcing plates (25), and the other ends of the reinforcing plates (25) are fixedly connected with the corresponding collecting hoppers (18), respectively.

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