A device for improving the uniformity of coating on hot-dip galvanized steel pipes

Abstract

This utility model relates to the field of galvanized steel pipe coating technology, specifically a device for improving the uniformity of the coating on hot-dip galvanized steel pipes. It includes a base plate, a collection box fixedly connected to the top of the base plate, and two side plates fixedly connected to the top of the base plate. A round rod is rotatably connected to the side of each side plate that is close to the other. This utility model utilizes an electric telescopic rod to fix the steel pipe with a round clamp. A fan generates airflow that blows onto the surface of the steel pipe, accelerating the downward flow of molten zinc. Continuous operation of the motor drives the steel pipe to rotate in both directions, ensuring that molten zinc at different locations on the steel pipe surface is blown by the nozzles. This results in uniform flow of molten zinc across the steel pipe surface, preventing thickness differences in the coating between the upper and lower ends of the steel pipe after cooling. This ensures a uniform coating, preventing issues with the adhesion between the coating and the substrate, as well as the appearance quality of the coating. It also prevents excessively thick coatings from causing a rough appearance and making the coating difficult to peel off.

Description

Technical Field

[0001] This utility model relates to the field of galvanized steel pipe coating technology, specifically a device for improving the uniformity of coating on hot-dip galvanized steel pipes. Background Technology

[0002] Galvanized steel pipes are widely used due to their excellent corrosion resistance. During hot-dip galvanizing, the workpiece is immersed in molten zinc at around 450℃. At room temperature, the workpiece absorbs heat from the zinc solution, reaching temperatures above 200℃. At this point, the interaction between zinc and iron becomes increasingly apparent, with zinc penetrating the iron surface. After the workpiece is removed from the molten zinc, its temperature gradually decreases to below 200℃, stopping the zinc-iron reaction and forming the hot-dip galvanized coating. However, when the steel pipe leaves the molten zinc, excess zinc adheres to its surface. Due to the length limitations of the steel pipe, it can only be used for a limited time. When hot-dip galvanized steel pipes are passed through a blower ring at a certain upward angle, the molten zinc on the surface of the steel pipe will flow downward under the action of gravity. After the molten zinc at the upper and lower ends of the steel pipe cross-section cools, a thickness difference in the coating will occur, resulting in poor uniformity of the zinc coating. The uneven zinc coating thickness will affect the adhesion between the coating and the substrate and the appearance quality of the coating. An excessively thick coating will cause the coating to be rough and easy to peel off, and the coated parts will not be able to withstand the impact during handling and installation. To address these issues, we propose a device to improve the uniformity of the coating of hot-dip galvanized steel pipes. Utility Model Content

[0003] The purpose of this invention is to provide a device for improving the uniformity of the coating on hot-dip galvanized steel pipes, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a device for improving the uniformity of coating on hot-dip galvanized steel pipes, comprising a base plate, a collection box fixedly connected to the top of the base plate, two side plates fixedly connected to the top of the base plate, a round rod rotatably connected to the side of each of the two side plates that are close to each other, a round seat fixedly connected to the end of each round rod, an electric telescopic rod fixedly connected to the side of each of the two round seats that are close to each other, a round clamp fixedly connected to the end of the output shaft of the electric telescopic rod, a fan fixedly connected to the rear side of the collection box, an L-shaped pipe connected to and fixedly connected to the air outlet of the fan, a rectangular pipe connected to and fixedly connected to the end of the L-shaped pipe, a plurality of nozzles connected to and fixedly connected to the bottom of the rectangular pipe, and a gear fixedly connected to the left end of one of the round rods on the left side, the gear having a rack meshing with its outer side.

[0005] More preferably, a rectangular base is fixedly connected to the bottom of the rack, and a vertical plate is fixedly connected to the top of the base plate.

[0006] More preferably, a motor is fixedly connected to the outer side of the vertical plate, and a connecting rod is fixedly connected to the end of the output shaft of the motor.

[0007] More preferably, a vertical rod is rotatably connected to the outer side of the connecting rod, the top end of the vertical rod is rotatably connected to the bottom of the rectangular base, a connecting block is fixedly connected to the outer side of the rack, and a square rod is fixedly connected to the top of the connecting block.

[0008] More preferably, a circular block is fixedly connected to the top of the square rod, and a fixing block is fixedly connected to the outer side of one of the side plates on the left side, the fixing block being slidably sleeved on the outer side of the square rod.

[0009] More preferably, the top of the fixed block and the bottom of the circular block are fixedly connected by the same spring, and the spring is movably sleeved on the outside of the square rod.

[0010] More preferably, two L-shaped rods are fixedly connected to the rear side of the collection box, the ends of the L-shaped rods are fixedly connected to the rear side of the rectangular tube, and a drain pipe is connected to and fixed to the front side of the collection box.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The electric telescopic rod drives the circular clamp to fix the steel pipe. The fan generates air and blows it onto the surface of the steel pipe, accelerating the downward flow of the zinc liquid on the surface of the steel pipe. The continuous operation of the motor can drive the steel pipe to rotate continuously in both directions, so that the zinc liquid at different positions on the surface of the steel pipe can be blown by the nozzle. This makes the zinc liquid on the surface of the steel pipe flow evenly, avoiding the thickness difference of the coating after the zinc liquid cools at the upper and lower ends of the steel pipe cross section. This makes the coating of the steel pipe uniform, avoiding affecting the adhesion between the coating and the substrate and the appearance quality of the coating. It also avoids the coating being too thick, which would result in a rough appearance and be difficult to peel off. Attached Figure Description

[0012] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a left-view stereoscopic structural diagram of the present invention;

[0014] Figure 3 This is a rear-view three-dimensional structural diagram of the present invention;

[0015] Figure 4 This is a three-dimensional structural diagram of the connection between the gear and the rack in this utility model.

[0016] In the diagram: 1. Base plate; 2. Collection box; 3. Side plate; 4. Round rod; 5. Round seat; 6. Electric telescopic rod; 7. Round clamp plate; 8. Fan; 9. L-shaped pipe; 10. Rectangular pipe; 11. Nozzle; 12. Gear; 13. Rack; 14. Rectangular seat; 15. Vertical plate; 16. Motor; 17. Vertical rod; 18. Connecting rod; 19. Connecting block; 20. Square rod; 21. Round block; 22. Fixing block; 23. Spring; 24. L-shaped rod; 25. Drain pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example

[0019] Please see Figure 1-4 This utility model provides a technical solution: a device for improving the uniformity of the coating of hot-dip galvanized steel pipes, including a base plate 1, a collection box 2 fixedly connected to the top of the base plate 1, two side plates 3 fixedly connected to the top of the base plate 1, a round rod 4 rotatably connected to the side of the two side plates 3 that are close to each other, a round seat 5 fixedly connected to the end of the round rod 4, an electric telescopic rod 6 fixedly connected to the side of the two round seats 5 that are close to each other, a round clamp 7 fixedly connected to the end of the output shaft of the electric telescopic rod 6, a fan 8 fixedly connected to the rear side of the collection box 2, an L-shaped pipe 9 connected and fixed to the air outlet of the fan 8, a rectangular pipe 10 connected and fixed to the end of the L-shaped pipe 9, and multiple nozzles 11 connected and fixed to the bottom of the rectangular pipe 10. On the left side... The left end of the round rod 4 extends to the outside of the side plate 3 and is fixedly connected to the gear 12. The outer side of the gear 12 is meshed with the rack 13. When the electric telescopic rod 6 is activated, the round clamp 7 is driven to fix the steel pipe. The fan 8 works and generates air that is blown onto the surface of the steel pipe, which accelerates the downward flow of the zinc liquid on the surface of the steel pipe. The motor 16 works continuously and can drive the steel pipe to rotate continuously in both directions, so that the zinc liquid at different positions on the surface of the steel pipe can be blown by the nozzle 11. This makes the zinc liquid on the surface of the steel pipe flow evenly, avoids the thickness difference of the coating after the zinc liquid cools down at the upper and lower ends of the steel pipe cross section, makes the coating of the steel pipe uniform, avoids affecting the bonding force between the coating and the substrate and the appearance quality of the coating, and avoids the coating being too thick, which would make the coating rough and difficult to peel off.

[0020] In this embodiment, specifically: a rectangular base 14 is fixedly connected to the bottom of the rack 13, and a vertical plate 15 is fixedly connected to the top of the base plate 1;

[0021] In this embodiment, specifically: a motor 16 is fixedly connected to the outer side of the vertical plate 15, and a connecting rod 18 is fixedly connected to the end of the output shaft of the motor 16;

[0022] In this embodiment, specifically: a vertical rod 17 is rotatably connected to the outer side of the connecting rod 18, the top of the vertical rod 17 is rotatably connected to the bottom of the rectangular seat 14, a connecting block 19 is fixedly connected to the outer side of the rack 13, and a square rod 20 is fixedly connected to the top of the connecting block 19.

[0023] In this embodiment, specifically: a circular block 21 is fixedly connected to the top of the square rod 20, and a fixing block 22 is fixedly connected to the outer side of one of the side plates 3 on the left side. The fixing block 22 is slidably sleeved on the outer side of the square rod 20.

[0024] In this embodiment, specifically: the top of the fixed block 22 and the bottom of the circular block 21 are fixedly connected to the same spring 23, and the spring 23 is movably sleeved on the outside of the square rod 20;

[0025] In this embodiment, specifically: two L-shaped rods 24 are fixedly connected to the rear side of the collection box 2, the ends of the L-shaped rods 24 are fixedly connected to the rear side of the rectangular tube 10, and the front side of the collection box 2 is connected to and fixed with a drain pipe 25.

[0026] In operation, this utility model works as follows: The galvanized steel pipe is placed between two circular clamps 7. Then, the electric telescopic rod 6 is activated, causing the circular clamps 7 to move closer together and fix the steel pipe in place. Next, the blower 8 and motor 16 are activated. The blower 8 generates air which is discharged through the L-shaped pipe 9 into the rectangular pipe 10. The rectangular pipe 10 then discharges the air into the nozzle 11, which blows the air onto the surface of the steel pipe, thus accelerating the downward flow of the molten zinc. Simultaneously, the motor 16 drives the connecting rod 18 to rotate. The first half-turn of the connecting rod 18 causes the vertical rod 17 to swing forward and move upward. The vertical rod 17 causes the rectangular seat 14 to move upward, which in turn causes the rack 13 to move upward. The rack 13 then causes the connecting block 19 to move, which in turn causes the square rod 20 to move. The square rod 20 then causes the circular block 21 to move, and the circular block 21, in turn, acts on the spring 23. The rack 13 moves upward, causing the gear 12 to rotate. The rotation of the gear 12 causes a round rod 4 on the left to rotate, which in turn causes the corresponding round seat 5 to rotate. The round seat 5, through the electric telescopic rod 6, causes the round clamp 7 to rotate. The rotation of the round clamp 7 causes the steel pipe to rotate clockwise. The connecting rod 18 rotates half a turn, causing the vertical rod 17 to swing backward and move downward. Similarly, the rotation of the round clamp 7 causes the steel pipe to rotate counterclockwise. The motor 16 continues to work, which can drive the steel pipe to rotate continuously in both directions. This allows the zinc liquid at different positions on the surface of the steel pipe to be blown by the nozzle 11, making the zinc liquid flow evenly on the surface of the steel pipe. This constitutes a device to improve the uniformity of the coating of hot-dip galvanized steel pipes, avoiding the thickness difference of the coating after the zinc liquid cools at the upper and lower ends of the steel pipe cross-section. This makes the coating of the steel pipe uniform, avoiding affecting the bonding force between the coating and the substrate and the appearance quality of the coating. It also avoids the coating from being too thick, which would cause the coating to be rough and difficult to peel off.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for improving the uniformity of coating on hot-dip galvanized steel pipes, comprising a base plate (1), characterized in that: A collection box (2) is fixedly connected to the top of the base plate (1). Two side plates (3) are fixedly connected to the top of the base plate (1). A round rod (4) is rotatably connected to the side of the two side plates (3) that are close to each other. A round seat (5) is fixedly connected to the end of the round rod (4). An electric telescopic rod (6) is fixedly connected to the side of the two round seats (5) that are close to each other. A round clamp (7) is fixedly connected to the end of the output shaft of the electric telescopic rod (6). A fan (8) is fixedly connected to the rear side of the collection box (2). An L-shaped pipe (9) is connected to and fixed to the air outlet of the fan (8). A rectangular pipe (10) is connected to and fixed to the end of the L-shaped pipe (9). A plurality of nozzles (11) are connected to and fixed to the bottom of the rectangular pipe (10). The left end of one of the round rods (4) on the left extends to the outside of the side plate (3) and is fixedly connected to a gear (12). A rack (13) meshes with the outside of the gear (12).

2. The apparatus for improving the uniformity of the coating of a hot-dip galvanized steel pipe according to claim 1, characterized in that: A rectangular seat (14) is fixedly connected to the bottom of the rack (13), and a vertical plate (15) is fixedly connected to the top of the base plate (1).

3. A device for improving the uniformity of the coating of a hot-dip galvanized steel tube according to claim 2, characterized in that: A motor (16) is fixedly connected to the outside of the vertical plate (15), and a connecting rod (18) is fixedly connected to the end of the output shaft of the motor (16).

4. The apparatus for improving the uniformity of the coating of a hot-dip galvanized steel pipe according to claim 3, characterized in that: A vertical rod (17) is rotatably connected to the outside of the connecting rod (18), and the top of the vertical rod (17) is rotatably connected to the bottom of the rectangular seat (14). A connecting block (19) is fixedly connected to the outside of the rack (13), and a square rod (20) is fixedly connected to the top of the connecting block (19).

5. A device for improving the uniformity of the coating of a hot-dip galvanized steel tube according to claim 4, characterized in that: A circular block (21) is fixedly connected to the top of the square rod (20), and a fixing block (22) is fixedly connected to the outer side of one of the side plates (3) on the left side. The fixing block (22) is slidably sleeved on the outer side of the square rod (20).

6. A device for improving the uniformity of the coating of a hot-dip galvanized steel tube according to claim 5, characterized in that: The top of the fixed block (22) and the bottom of the circular block (21) are fixedly connected by the same spring (23), and the spring (23) is movably sleeved on the outside of the square rod (20).

7. A device for improving the uniformity of the coating of a hot-dip galvanized steel tube according to claim 6, characterized in that: The collection box (2) has two L-shaped rods (24) fixedly connected to its rear side. The ends of the L-shaped rods (24) are fixedly connected to the rear side of the rectangular tube (10). The front side of the collection box (2) is connected to and fixed with a drain pipe (25).

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