Thickness adjusting system for galvanized layer on pipe wall of hot-dip galvanized steel pipe

Abstract

The invention relates to the technical field of steel pipe grinding, in particular to a hot-dip galvanized steel pipe wall galvanized layer thickness adjusting system which comprises a bottom plate, electric sliding rails, a bidirectional electric guide rail, a grinding machine and the like, the two electric sliding rails are installed at the top of the bottom plate, and the bidirectional electric guide rail is installed between sliding blocks of the two electric sliding rails; and grinding machines for grinding the two ends of the steel pipe are mounted at the bottoms of two sliding blocks of the two-way electric guide rail. Steel pipes can be conveyed rightwards through the feeding conveyor and conveyed into the V-shaped groove for loading, zinc coatings at the two ends of the steel pipes can be ground through the grinding machine, after grinding is completed, the conveying frame continues to rotate, and the ground steel pipes can gradually get close to the discharging conveyor and roll to the discharging conveyor for unloading; feeding and discharging are automatically carried out, the production continuity is higher, and therefore the production efficiency can be improved, and the continuous and efficient production requirement is met.

Description

Hot-dip galvanized steel pipe wall zinc coating thickness adjustment system Technical Field

[0001] This invention relates to the field of steel pipe grinding technology, and in particular to a system for adjusting the thickness of the galvanized layer on the wall of hot-dip galvanized steel pipes. Background Technology

[0002] Adjusting the thickness of the zinc coating on hot-dip galvanized steel pipes is one of the important processes in the field of metal surface treatment. Its main purpose is to improve the corrosion resistance of steel pipes and extend their service life. The zinc coating is usually formed by hot-dip galvanizing, electroplating or thermal spraying. Among them, hot-dip galvanizing is the most common method. By immersing the steel pipe in molten zinc, a uniform and dense coating is formed on the surface of the steel pipe.

[0003] During metal processing or welding, the galvanized layer on the surface of the steel pipe may undergo physical or chemical changes due to high temperatures. For example, the high temperature during welding can cause the galvanized layer to melt, decompose, or volatilize, resulting in the generation of harmful substances such as zinc oxide and zinc vapor. Therefore, in actual production, the galvanized layer at the welded end of the steel pipe is ground to ensure welding quality.

[0004] Current grinding equipment uses rollers to drive the steel pipe to rotate and grinds the ends of the steel pipe through a grinding machine. The current process relies on manual loading and unloading. After each steel pipe is completed, it needs to be manually replaced with the next one. Due to the low efficiency of manual operation, it affects the continuity of production. In the processing of large-size steel pipes or mass production scenarios, this operation method is difficult to meet the needs of continuous and efficient production, resulting in limited overall production efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a hot-dip galvanized steel pipe wall zinc coating thickness adjustment system, which can overcome the disadvantages of low efficiency of manual operation, affecting the continuity of production. In large-size steel pipe processing or batch production scenarios, manual operation is difficult to meet the continuous and efficient production requirements, resulting in limited overall production efficiency.

[0006] Technical Solution: A system for adjusting the thickness of the galvanized layer on the wall of a hot-dip galvanized steel pipe includes a base plate, electric slide rails, bidirectional electric guide rails, a grinding machine, a mounting plate, a feeding conveyor, a feeding tray, a discharging conveyor, a discharging tray, and a conveying mechanism. Two electric slide rails are mounted on the top of the base plate, and a bidirectional electric guide rail is installed between the sliders of the two electric slide rails. A grinding machine for grinding both ends of the steel pipe is mounted on the bottom of each slider of the bidirectional electric guide rail. Two mounting plates are connected to the top of the base plate, and a feeding conveyor and a discharging conveyor are installed between the two mounting plates. A feeding tray and a discharging tray for supporting the steel pipe are connected to the top of both mounting plates. The feeding conveyor transports the steel pipe to the conveying mechanism, and the conveying mechanism transports the steel pipe between the two grinding machines.

[0007] As an improvement to the above solution, the conveying mechanism includes a damping bushing, a rotating shaft, a conveyor frame, a rotary conveyor, blocks, baffles, and a drive assembly. Damping bushings are mounted on the mounting plate, and a rotating shaft is rotatably connected to both damping bushings. The conveyor frame is connected to the rotating shaft. Five V-shaped grooves for accommodating steel pipes are evenly spaced circumferentially on the outer side of the conveyor frame. A rotary conveyor for driving the steel pipes to rotate is installed on both sides of the inside of the V-shaped grooves. Blocks for supporting the conveyor belts of the rotary conveyors are connected to both sides of the inside of the V-shaped grooves. Baffles are connected to the inside of each V-shaped groove. The drive assembly drives the conveyor frame to rotate, causing the conveyor frame to transport the steel pipes between the two grinding machines.

[0008] As an improvement to the above solution, the drive assembly includes gears, a moving plate, a connecting plate, and a rack. Gears are mounted on the rotating shaft via a one-way clutch. The bottom of the slider of the electric slide rail is connected to a moving plate, and a connecting plate is connected to each moving plate. A rack is mounted on each connecting plate. As the rack moves upward, it meshes with the gear and drives the gear to rotate. The gear drives the conveyor frame to rotate.

[0009] As an improvement to the above solution, a positioning mechanism is also included. The positioning mechanism includes a positioning rod and a pentagonal block. The positioning rod is connected to the bidirectional electric guide rail, and the pentagonal block is connected to the rotating shaft. Five positioning holes are evenly spaced on the outer circumference of the pentagonal block. The positioning rod will insert into the positioning hole during the downward movement to position the conveyor frame.

[0010] As an improvement to the above solution, the lower end of the positioning rod has a ball head structure, and the corners inside the positioning hole are rounded.

[0011] As an improvement to the above solution, a limiting mechanism is also included. The limiting mechanism includes a mounting block and a limiting wheel. The grinding machine is connected to the mounting block, and the mounting block is rotatably connected to the limiting wheel for limiting the steel pipe in the V-groove.

[0012] As an improvement to the above solution, a pressing mechanism is also included. The pressing mechanism includes a connecting frame, a pressure roller and a motor. The connecting frame is connected to the bottom of the bidirectional electric guide rail. A pressure roller for pressing the steel pipe in the V-groove is rotatably connected to the connecting frame. The motor is installed on the connecting frame, and the output shaft of the motor is connected to the pressure roller.

[0013] As an improvement to the above solution, a dust collection mechanism is also included, which includes a mounting bracket and a dust collection pipe. The mounting bracket is connected to the grinder, and the dust collection pipe is connected to the mounting bracket.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention can convey steel pipes to the right through the feeding conveyor and transport the steel pipes into the V-shaped groove for loading. The galvanized layer at both ends of the steel pipe can be ground by the grinding machine. After grinding is completed, the conveyor frame continues to rotate, and the ground steel pipe will gradually approach the discharge conveyor and roll onto the discharge conveyor for unloading. Automatic loading and unloading results in higher production continuity, thereby improving production efficiency to meet the needs of continuous and efficient production.

[0015] 2. The bidirectional electric guide rail can drive the positioning rod to move downwards. The positioning rod will insert into the positioning hole to position the conveyor frame, ensuring that the conveyor frame can be accurately located in the predetermined position and preventing the conveyor frame from rotating during the grinding process.

[0016] 3. The two-way electric guide rail can drive the two limit wheels to move closer to each other. The limit wheels can center the steel pipe and limit its position to prevent it from shifting. At the same time, the pressure roller can press the steel pipe down to prevent it from shaking during the grinding process and improve the grinding accuracy.

[0017] 4. The dust extraction tube can remove the sanding debris, preventing it from flying everywhere and thus avoiding its impact on the surrounding environment. Attached Figure Description

[0018] Figure 1 is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 is a three-dimensional structural diagram of the bidirectional electric guide rail and the grinding machine of the present invention.

[0020] Figure 3 is a three-dimensional structural schematic diagram of the conveying mechanism of the present invention.

[0021] Figure 4 is a three-dimensional structural diagram of the rotary conveyor, baffle and gear of the present invention.

[0022] Figure 5 is a cross-sectional view of the conveyor frame of the present invention.

[0023] Figure 6 is a three-dimensional structural diagram of the gear, moving plate, connecting plate and rack of the present invention.

[0024] Figure 7 is a three-dimensional structural diagram of the positioning mechanism of the present invention.

[0025] Figure 8 is a cross-sectional view of the pentagonal block of the present invention.

[0026] Figure 9 is a three-dimensional structural diagram of the limiting mechanism and the dust collection mechanism of the present invention.

[0027] Figure 10 is a three-dimensional structural diagram of the pressing mechanism of the present invention.

[0028] The following are the labels in the diagram: 1. Base plate, 2. Electric slide rail, 3. Bidirectional electric guide rail, 4. Grinding machine, 5. Mounting plate, 6. Feeding conveyor, 7. Feeding tray, 8. Discharge conveyor, 9. Discharge tray, 101. Damping bushing, 102. Rotating shaft, 103. Conveyor frame, 104. V-groove, 105. Rotary conveyor, 106. Stop block, 107. Baffle, 108. Gear, 109. Moving plate, 1010. Connecting plate, 1011. Rack, 111. Positioning rod, 112. Pentagonal block, 113. Positioning hole, 121. Mounting block, 122. Limiting wheel, 131. Connecting frame, 132. Pressure roller, 133. Motor, 141. Mounting frame, 142. Dust suction pipe. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0030] As shown in Figures 1-6, a system for adjusting the galvanized layer thickness of a hot-dip galvanized steel pipe includes a base plate 1, electric slide rails 2, bidirectional electric guide rails 3, a grinder 4, a mounting plate 5, a feeding conveyor 6, a feeding tray 7, a discharging conveyor 8, a discharging tray 9, and a conveying mechanism. Electric slide rails 2 are symmetrically mounted on the top center of the base plate 1 via bolts. A bidirectional electric guide rail 3 is bolted between the sliders of the two electric slide rails 2. A grinder 4 is bolted to the bottom of each slider of the bidirectional electric guide rail 3. 1. The top is symmetrically connected to the front and back with mounting plates 5 by bolts. The two mounting plates 5 are located between the two electric slide rails 2. The upper left part between the two mounting plates 5 is equipped with a feeding conveyor 6. The upper left side of the top of the two mounting plates 5 is connected to a feeding support plate 7 by bolts. The upper right part between the two mounting plates 5 is equipped with a discharging conveyor 8. The upper right side of the top of the two mounting plates 5 is connected to a discharging support plate 9 by bolts. The feeding conveyor 6 is used to transport the steel pipe to the conveying mechanism. The conveying mechanism is used to transport the steel pipe between the two grinding machines 4.

[0031] As shown in Figures 3-6, the conveying mechanism includes a damping bushing 101, a rotating shaft 102, a conveyor frame 103, a rotary conveyor 105, a stop block 106, a baffle plate 107, and a drive assembly. A damping bushing 101 is installed in the middle of the upper part of each mounting plate 5. A rotating shaft 102 is rotatably connected to both damping bushings 101. Three conveyor frames 103 are evenly spaced on the rotating shaft 102, located between the two mounting plates 5. Five V-shaped grooves 104 are evenly spaced on the outer circumference of each conveyor frame 103. The structure of the V-shaped grooves 104 allows them to accommodate steel pipes of different diameters. Inside each V-shaped groove 104, on both sides, are installed... The rotary conveyor 105 has stop blocks 106 connected to both sides of the V-shaped trough 104. The stop blocks 106 are located inside the rotary conveyor 105 and are in contact with the conveyor belt of the rotary conveyor 105. The V-shaped trough 104 has baffles 107 symmetrically connected to the front and back. The feed tray 7 and the discharge tray 9 have evenly spaced notches on their adjacent sides. The notches on the feed tray 7 and the discharge tray 9 can provide movement space for the baffles 107 and prevent the baffles 107 from colliding with the feed tray 7 and the discharge tray 9. The drive assembly is used to drive the conveyor frame 103 to rotate, so that the conveyor frame 103 can transport the steel pipe between the two grinding machines 4.

[0032] As shown in Figures 4 and 6, the drive assembly includes a gear 108, a movable plate 109, a connecting plate 1010, and a rack 1011. The front and rear of the rotating shaft 102 are equipped with gears 108 via one-way clutches. The bottom of the slider of the electric slide rail 2 is connected to the movable plate 109. The lower part of the side of the two movable plates 109 that are close to each other is connected to the connecting plate 1010 via bolts. The lower part of the side of the two connecting plates 1010 that are close to each other is equipped with racks 1011 via bolts. The rack 1011 will mesh with the gear 108 during the upward movement.

[0033] The operator can set up the entire equipment at the discharge end of the production line, and the steel pipes are transported to the feeding conveyor 6 via the production line. The feeding pallet 7 can hold the steel pipes, and the feeding conveyor 6 can transport the steel pipes to the right, conveying them into the V-shaped trough 104 for loading. At this time, the operator controls the electric slide rail 2 to move the moving plate 109 and the connecting plate 1010 upward. The connecting plate 1010 drives the rack 1011 to move upward. During the upward movement, the rack 1011 will mesh with the gear 108 and drive the gear 108 to rotate. The gear 108 drives the rotating shaft 102 to rotate, and the rotating shaft 102 drives the conveyor frame 103 to rotate. The conveyor frame 103 transports the steel pipes upward, conveying them between the two grinding machines 4. The baffle 107 can hold the V-shaped trough 104. The steel pipe in the V-groove 104 is blocked. At this time, the next steel pipe will be conveyed to the next V-groove 104. When the rack 1011 moves upward and disengages from the gear 108, the gear 108 stops rotating. At this time, the conveyor frame 103 has rotated exactly 72 degrees (one-fifth of a turn). The damping bushing 101 can increase the resistance to the rotation of the shaft 102, thereby increasing the resistance to the rotation of the conveyor frame 103 and preventing the conveyor frame 103 from continuing to rotate under inertia. Then, the operator controls the electric slide rail 2 to drive the bidirectional electric guide rail 3, the grinder 4 and the rack 1011 to move downward, lowering the grinder 4. At the same time, the rack 1011 will mesh with the gear 108 during the downward movement and drive the gear 108 to rotate. Under the action of the one-way clutch Gear 108 will not drive shaft 102 to rotate. Then, the grinder 4 moves downwards until it is flush with the end of the steel pipe. The operator can then close the electric slide rail 2 and control the bidirectional electric guide rail 3 to move the two grinders 4 closer together, so that the two grinders 4 contact both ends of the steel pipe. Then, the rotary conveyor 105 and the grinders 4 are started. The grinders 4 grind the galvanized layer at both ends of the steel pipe. The rotary conveyor 105 drives the steel pipe to rotate. The grinders 4 and the steel pipe rotate in the same direction, clockwise, allowing the grinders 4 to grind other parts of the steel pipe end. The stop block 106 supports the conveyor belt of the rotary conveyor 105, ensuring sufficient contact between the conveyor belt and the steel pipe. The rotary conveyor 105 ensures smooth rotation of the steel pipe. After grinding, the operator controls the electric slide rail 2 to move the grinding machine 4 and rack 1011 upwards, raising the grinding machine 4. Simultaneously, the rack 1011 engages with the gear 108 during its upward movement, causing the gear 108 to rotate. The gear 108 then rotates the conveyor frame 103, which transports the steel pipe upwards between the two grinding machines 4. Meanwhile, the ground steel pipe gradually approaches the discharge conveyor 8 and rolls onto it for unloading. This automatic loading and unloading system ensures higher production continuity and improves production efficiency to meet continuous and high-efficiency production demands. The discharge tray 9 supports the ground steel pipe.The discharge conveyor 8 can transport the polished steel pipes to the right. A conveying device can be installed to the right of the discharge conveyor 8. The discharge conveyor 8 transports the polished steel pipes to the conveying device, which then transports them to the next process step.

[0034] As shown in Figures 7 and 8, a positioning mechanism is also included. The positioning mechanism includes a positioning rod 111 and a pentagonal block 112. The positioning rod 111 is connected to both the front and rear sides of the bottom of the bidirectional electric guide rail 3. The pentagonal block 112 is connected to both the front and rear ends of the rotating shaft 102. Five positioning holes 113 are evenly spaced around the outer circumference of the pentagonal block 112. The positioning holes 113 and the V-shaped grooves 104 correspond one-to-one. The positioning rod 111 will be inserted into the positioning hole 113 during the downward movement. The lower end of the positioning rod 111 has a ball head structure, and the corners inside the positioning hole 113 are rounded.

[0035] As the bidirectional electric guide rail 3 moves downward, it drives the positioning rod 111 downward. At the same time, the rack 1011 also moves downward. After the rack 1011 disengages from the gear 108, the positioning rod 111 inserts into the positioning hole 113 to position the conveyor frame 103, ensuring it is accurately positioned and preventing rotation during grinding. If the diameter of the steel pipe is small, the downward movement distance of the bidirectional electric guide rail 3 will increase. In this case, the positioning rod 111 will penetrate the positioning hole 113. If the conveyor frame 1011... If the position of 3 is slightly off, the positioning rod 111 and the positioning hole 113 will not correspond perfectly. The lower end of the positioning rod 111 has a ball head structure, and the corners inside the positioning hole 113 are rounded. Therefore, the positioning rod 111 can be smoothly inserted into the positioning hole 113 and correct the position of the conveyor frame 103. When the bidirectional electric guide rail 3 moves upward, it will drive the positioning rod 111 to move upward. At this time, the rack 1011 also moves upward. After the positioning rod 111 moves upward and moves out of the positioning hole 113, the rack 1011 will mesh with the gear 108 and drive the meshing rotation.

[0036] As shown in Figure 9, it also includes a limiting mechanism, which includes a mounting block 121 and a limiting wheel 122. The right side of the grinder 4 is connected to the mounting block 121, and the bottom of the mounting block 121 is rotatably connected to the limiting wheel 122. The height of the lower part of the limiting wheel 122 is lower than the height of the bottom of the grinder 4.

[0037] As the grinding machine 4 moves downward, it will drive the mounting block 121 and the limiting wheel 122 downward. The lower part of the limiting wheel 122 is lower than the bottom of the grinding machine 4. Therefore, when the grinding machine 4 approaches the steel pipe, the limiting wheel 122 is already flush with the end of the steel pipe. At this time, the operator turns off the electric slide rail 2 and then controls the bidirectional electric guide rail 3 to drive the two grinding machines 4 to move towards each other. The grinding machine 4 drives the two limiting wheels 122 to move towards each other. The limiting wheels 122 can center the steel pipe and limit the position of the steel pipe to prevent the position of the steel pipe from shifting and improve the grinding accuracy. Then the grinding machine 4 continues to move downward so that the two grinding machines 4 contact the two ends of the steel pipe respectively.

[0038] As shown in Figure 10, it also includes a pressing mechanism, which includes a connecting frame 131, a pressure roller 132 and a motor 133. The connecting frame 131 is bolted to the bottom center of the bidirectional electric guide rail 3. The pressure roller 132 is rotatably connected to the lower part of the connecting frame 131. The motor 133 is bolted to the lower front side of the connecting frame 131. The output shaft of the motor 133 and the front end of the pressure roller 132 are connected by a coupling.

[0039] As the grinding machine 4 moves downward, it will drive the connecting frame 131 to move downward. The connecting frame 131 will drive the pressure roller 132 to move downward. The pressure roller 132 will contact the steel pipe and press it down to prevent the steel pipe from shaking during the grinding process and improve the grinding accuracy. During the grinding process, the motor 133 can be started. The output shaft of the motor 133 can drive the pressure roller 132 to rotate. The pressure roller 132 drives the steel pipe to rotate, assisting the steel pipe to rotate and making the steel pipe rotate more smoothly.

[0040] As shown in Figure 9, it also includes a dust collection mechanism, which includes a mounting bracket 141 and a dust collection pipe 142. The mounting bracket 141 is connected to the left side of the grinder 4. The dust collection pipe 142 is bolted to the bottom of the mounting bracket 141. The left end of the dust collection pipe 142 has a flange for easy connection to a vacuum cleaner.

[0041] Workers can connect the left end of the suction pipe 142 to a vacuum cleaner. During the grinding process of the steel pipe, the vacuum cleaner is turned on. The vacuum cleaner extracts the grinding debris through the suction pipe 142, preventing the debris from flying everywhere and thus avoiding the debris from affecting the surrounding environment. Moreover, since the grinder 4 rotates clockwise, the debris flies to the left and can fly into the suction pipe 142, thus enabling better collection of the debris.

[0042] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A system for adjusting the thickness of the galvanized layer on the wall of a hot-dip galvanized steel pipe, comprising a base plate (1), characterized in that: It also includes an electric slide rail (2), a bidirectional electric guide rail (3), a grinder (4), a mounting plate (5), a feeding conveyor (6), a feeding tray (7), a discharging conveyor (8), a discharging tray (9), and a conveying mechanism. Two electric slide rails (2) are installed on the top of the base plate (1). A bidirectional electric guide rail (3) is installed between the sliders of the two electric slide rails (2). A grinder (4) for grinding both ends of the steel pipe is installed at the bottom of the two sliders of the bidirectional electric guide rail (3). Two mounting plates (5) are connected to the top of the base plate (1). A feeding conveyor (6) and a discharging conveyor (8) are installed between the two mounting plates (5). The top of the two mounting plates (5) are connected together to a feeding tray (7) and a discharging tray (9) for supporting the steel pipe. The feeding conveyor (6) is used to transport the steel pipe to the conveying mechanism. The conveying mechanism is used to transport the steel pipe between the two grinders (4).

2. The hot-dip galvanized steel pipe wall zinc coating thickness adjustment system as described in claim 1, characterized in that: The conveying mechanism includes a damping bushing (101), a rotating shaft (102), a conveyor frame (103), a rotary conveyor (105), a stop (106), a baffle (107), and a drive assembly. A damping bushing (101) is mounted on each mounting plate (5). A rotating shaft (102) is rotatably connected within both damping bushings (101). A conveyor frame (103) is connected to the rotating shaft (102). Five evenly spaced sections are arranged around the outer circumference of the conveyor frame (103) for holding... The steel pipe has a V-shaped groove (104). Both sides of the V-shaped groove (104) are equipped with rotary conveyors (105) for driving the steel pipe to rotate. Both sides of the V-shaped groove (104) are connected with blocks (106) for supporting the conveyor belt of the rotary conveyor (105). Baffles (107) are connected inside the V-shaped groove (104). The drive assembly is used to drive the conveyor frame (103) to rotate, so that the conveyor frame (103) transports the steel pipe between the two grinding machines (4).

3. The hot-dip galvanized steel pipe wall zinc coating thickness adjustment system as described in claim 2, characterized in that: The drive assembly includes a gear (108), a moving plate (109), a connecting plate (1010), and a rack (1011). The gear (108) is mounted on the rotating shaft (102) via a one-way clutch. The bottom of the slider of the electric slide rail (2) is connected to the moving plate (109). The moving plate (109) is connected to the connecting plate (1010). The connecting plate (1010) is mounted with the rack (1011). The rack (1011) will mesh with the gear (108) during the upward movement and drive the gear (108) to rotate. The gear (108) drives the conveyor frame (103) to rotate.

4. The hot-dip galvanized steel pipe wall zinc coating thickness adjustment system as described in claim 3, characterized in that: It also includes a positioning mechanism, which includes a positioning rod (111) and a pentagonal block (112). The positioning rod (111) is connected to the bidirectional electric guide rail (3), and the pentagonal block (112) is connected to the rotating shaft (102). Five positioning holes (113) are evenly spaced on the outer circumference of the pentagonal block (112). The positioning rod (111) will be inserted into the positioning hole (113) during the downward movement to position the conveyor frame (103).

5. The hot-dip galvanized steel pipe wall zinc coating thickness adjustment system as described in claim 4, characterized in that: The lower end of the positioning rod (111) is a ball head structure, and the corners inside the positioning hole (113) are rounded.

6. The hot-dip galvanized steel pipe wall zinc coating thickness adjustment system as described in claim 2, characterized in that: It also includes a limiting mechanism, which includes a mounting block (121) and a limiting wheel (122). The grinding machine (4) is connected to the mounting block (121), and the mounting block (121) is rotatably connected to the limiting wheel (122) for limiting the steel pipe in the V-groove (104).

7. The hot-dip galvanized steel pipe wall zinc coating thickness adjustment system as described in claim 2, characterized in that: It also includes a pressing mechanism, which includes a connecting frame (131), a pressure roller (132) and a motor (133). The bottom of the bidirectional electric guide rail (3) is connected to the connecting frame (131). The connecting frame (131) is rotatably connected to the pressure roller (132) for pressing the steel pipe in the V-groove (104). The connecting frame (131) is equipped with a motor (133), and the output shaft of the motor (133) is connected to the pressure roller (132).

8. The hot-dip galvanized steel pipe wall zinc coating thickness adjustment system as described in claim 1, characterized in that: It also includes a vacuuming mechanism, which includes a mounting bracket (141) and a vacuuming pipe (142). The mounting bracket (141) is connected to the polisher (4), and the vacuuming pipe (142) is connected to the mounting bracket (141).

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