Galvanized pipe cooling and passivating equipment

Abstract

The invention discloses galvanized pipe cooling and passivating equipment, and relates to the technical field of hot galvanizing. The device comprises a device body, the top of the device body is sequentially provided with a cooling pond, a passivation pond and a secondary passivation device, the top of the device body is provided with a driving assembly, and the moving end of the driving assembly is provided with a containing assembly used for containing square and rectangular pipes; the secondary passivation device comprises a passivation solution pool arranged at the top of the equipment main body, a shell fixed at the top of the equipment main body, and a pump fixed on the outer wall of the equipment main body, and a filter screen is fixed above the inner wall of the passivation solution pool. Through the arrangement of the secondary passivation device, the spraying pipe sprays a passivation solution on the surface of the square and rectangular pipe in a rotary mode, so that secondary passivation operation on the surface of the square and rectangular pipe is achieved, meanwhile, it can be ensured that the passivation solution is evenly distributed and covers all corners of the square and rectangular pipe, the passivation effect is enhanced, and the spraying leakage phenomenon is reduced.

Description

Technical Field

[0001] This invention relates to the field of hot-dip galvanizing technology, specifically to a cooling and passivation device for galvanized pipes. Background Technology

[0002] Galvanized pipe passivation equipment is a specialized device used to treat the surface of galvanized pipes. It primarily works by immersing the pipe in a passivation solution to form a stable passivation film. This film effectively prevents corrosion, enhancing the corrosion resistance and service life of the galvanized pipe. The equipment is easy to operate, highly efficient, and widely used in construction, automotive, and industrial fields, ensuring that galvanized pipes maintain excellent performance in various environments.

[0003] Chinese patent CN116463576B discloses a galvanized pipe cooling and passivation device, including a support platform and a support frame. The support platform is located on top of the support frame and is fixedly connected to the top of the support frame. It also includes a rotating bracket located at the center of the top of the support platform. A positioning box is fixedly connected to the side of the rotating part of the rotating bracket. The positioning box is used to hold workpieces, and the rotating bracket is used to drive the positioning box and the workpieces inside the positioning box to switch positions. An air-cooling device is located above the rotating bracket, and its bottom is fixedly connected to the support platform via a connecting bracket. The air-cooling device is used to initially cool the workpieces inside the positioning box. This patent relates to the field of hot-dip galvanizing cooling technology. This galvanized pipe cooling and passivation device facilitates automatic material conveying, cooling, and unloading operations without manual control, making it easy to use and offering high cooling efficiency.

[0004] However, current passivation equipment has the following problems: when performing passivation of square and rectangular tubes, it is not convenient to perform secondary passivation on galvanized square and rectangular tubes. In addition, during the secondary passivation of square and rectangular tubes, the spray head layout of traditional spray equipment is unreasonable, and the corners of the square and rectangular tubes cannot be effectively sprayed with passivation liquid, resulting in poor uniformity of the passivation film. Immersion equipment has low processing efficiency, which leads to serious waste of passivation liquid. Therefore, we propose a cooling passivation equipment for galvanized tubes. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a galvanized pipe cooling and passivation device, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a galvanized pipe cooling and passivation device, comprising a main body, a cooling pool, a passivation pool, and a secondary passivation device sequentially arranged on the top of the main body, a driving assembly on the top of the main body, and a placement assembly for placing rectangular tubes at the moving end of the driving assembly, the secondary passivation device comprising a passivation liquid pool opened on the top of the main body, a shell fixed on the top of the main body, and a pump fixed on the outer wall of the main body, a filter screen fixed above the inner wall of the passivation liquid pool, the inlet end of the pump extending into the interior of the passivation liquid pool, an L-shaped main pipe fixed on the top of the pump, and the L-shaped main pipe fixed on the inner wall of the shell, a plurality of spray pipes evenly and equidistantly rotatably installed on the outer wall of the L-shaped main pipe, a pulley 1 fixed to the outside of the spray pipe, two adjacent pulleys 1 connected by belt drive, a drive motor fixed on the outer wall of the shell, a pulley 2 fixed to the output end of the drive motor, and the pulley 2 connected to the pulley 1 corresponding to one side of the spray pipe by belt drive.

[0007] According to the above technical solution, the drive assembly includes a crossbeam frame fixed to the top of the main body of the equipment. A screw is rotatably connected inside the crossbeam frame and driven by a motor. A screw block is threadedly connected to the outside of the screw and is slidably installed inside the crossbeam frame. The screw block is the drive end of the drive assembly.

[0008] According to the above technical solution, the placement assembly includes an electric push rod fixed at the screw block. A grooved plate is fixed to the bottom of the telescopic end of the electric push rod. Several grooves are formed on the side wall of the grooved plate. A connecting plate is vertically slidably installed inside the groove of the grooved plate, and a spring is provided between the connecting plate and the groove of the grooved plate. Several U-shaped frames are evenly and equidistantly fixed to the top of the connecting plate. A placement column is hinged inside the U-shaped frame. A baffle is fixed to the outer wall of the placement column. The baffle is used to limit the position of the rectangular tube at the placement column.

[0009] According to the above technical solution, a plug rod is horizontally inserted and slidably installed inside the placement column. A sleeve is fixed on the side of the plug rod away from the U-shaped frame, and a spring is provided between the sleeve and the outer wall of the placement column. A slot adapted to the plug rod is opened on the inner wall of the U-shaped frame.

[0010] According to the above technical solution, the secondary passivation device further includes a slide plate that is vertically slidably installed inside the outer shell. A spring is provided between the slide plate and the inner wall of the outer shell. Several elastic telescopic plates are evenly and equidistantly fixed on the top of the slide plate. A circular groove plate is fixed at the telescopic end of the elastic telescopic plate. A circular groove adapted to the sleeve is opened on the outer wall of the circular groove plate. An arc block wheel is fixed on the outer wall of the pulley corresponding to the spray pipe on one side.

[0011] According to the above technical solution, an arc block is fixed on the outer wall of the arc block wheel, and the bottom of the skateboard is located on the arc block movement trajectory of the arc block wheel.

[0012] According to the above technical solution, a purging device is provided inside the outer shell. The purging device includes a vertical frame fixed to the top of the inner wall of the outer shell. An air pipe is fixed to the bottom of the vertical frame and is connected to an external air source. The air pipe is wavy. Several connecting pipes are evenly and equidistantly fixed to the bottom of the air pipe. A fixing ring is fixed to the bottom of each connecting pipe. The fixing rings are staggered. A ring pipe is rotatably installed on the inner wall of the fixing ring. Several blades are evenly fixed to the circumference of the inner wall of the ring pipe. Several oblique air nozzles are evenly fixed to the circumference of the side of the ring pipe near the spray pipe.

[0013] According to the above technical solution, the ring pipe is connected to the interior of the trachea through a connecting pipe.

[0014] According to the above technical solution, a lifting device is provided at both the cooling pool and the passivation pool. The lifting device includes two I-shaped rods that are respectively fixed on both sides of the main body of the equipment. A geometric push rod is slidably installed between the outer walls of the two I-shaped rods, and a spring is provided between the geometric push rod and the I-shaped rod.

[0015] According to the above technical solution, the placement column is located on the horizontal movement trajectory of the geometric push rod.

[0016] This invention provides a cooling and passivation device for galvanized pipes. It has the following beneficial effects:

[0017] (1) The present invention uses a secondary passivation device to enable the electric push rod, groove plate, connecting plate, U-shaped frame, placement column, screw, screw block, pump, passivation liquid pool, L-shaped main pipe, drive motor, pulley two, and pulley one to drive the spray pipe to rotate and spray passivation liquid onto the surface of the rectangular tube, thereby achieving secondary passivation of the rectangular tube surface. At the same time, it can ensure that the passivation liquid is evenly distributed and covers every corner of the rectangular tube, enhancing the passivation effect and reducing the phenomenon of missed spraying. Meanwhile, the placement column, sleeve, circular groove plate, insertion rod, U-shaped frame, arc block wheel, and sliding plate work together to drive the rectangular tube placed on the placement column to move up and down repeatedly. Through the up and down reciprocating motion, the rectangular tube can maintain contact with the spray pipe in all directions, so that the passivation liquid can fully penetrate and cover the surface of the rectangular tube, optimizing the formation of the passivation film.

[0018] (2) The present invention, through the setting of the purging device, enables the air pipe, connecting pipe and ring pipe to work together to drive the air sprayed by the inclined air nozzle to purge the passivation liquid remaining on the surface of the rectangular tube. When the passivation liquid remains on the surface of the rectangular tube, it will react with moisture or other substances in the air to form alkaline substances or other corrosive substances. By spraying to remove it, the occurrence of such reaction can be reduced, thereby reducing the risk of alkalinity return of the rectangular tube. At the same time, when the air flows inside the ring pipe, the air will drive the blade to drive the ring pipe to rotate at the fixed ring, thereby making the ring pipe rotate to drive the inclined air nozzle to purge the passivation liquid remaining on the surface of the rectangular tube. The rotational purging method can cover a wider area, thereby ensuring that every part of the surface of the rectangular tube can be purged, reducing the possibility of residual liquid.

[0019] (3) The present invention, through the setting of the lifting device, enables the placement column, the geometric push rod and the I-shaped rod to work together to drive the geometric push rod to push against the placement column and the rectangular tube in an inclined state, so that the coolant or passivation liquid inside the rectangular tube can flow out smoothly when it is removed from the cooling pool or passivation pool, reducing liquid residue. This helps to avoid pollution problems in subsequent processes. During the cooling or passivation process, if the rectangular tube is in a horizontal state, the liquid is easy to accumulate in the tube, causing unnecessary interference in subsequent processes. The inclined state promotes liquid flow and reduces the risk of liquid accumulation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the entire invention;

[0021] Figure 2 This is a partial cross-sectional schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the component placement in this invention;

[0023] Figure 4 This is a partial cross-sectional schematic diagram of the component placement of the present invention;

[0024] Figure 5 This is a partial cross-sectional view of the component placement structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the secondary passivation device of the present invention;

[0026] Figure 7 This is a partial structural schematic diagram of the secondary passivation device of the present invention;

[0027] Figure 8 This is a schematic diagram of the purging device of the present invention;

[0028] Figure 9 This is a schematic diagram showing the air blowing direction of the oblique nozzle of the present invention;

[0029] Figure 10This is a partial cross-sectional schematic diagram of the purging device of the present invention;

[0030] Figure 11 This is a schematic diagram of the lifting device of the present invention.

[0031] In the diagram: 1. Main body of the equipment; 2. Cooling pool; 3. Passivation pool; 4. Drive assembly; 41. Crossbeam frame; 42. Screw; 43. Screw block; 5. Placement assembly; 51. Electric push rod; 52. Groove plate; 53. Connecting plate; 54. Placement column; 55. Baffle plate; 56. U-shaped frame; 57. Sleeve; 58. Insert rod; 6. Secondary passivation device; 61. Passivation liquid pool; 62. Filter screen; 63. Outer shell; 64. Pump; 5. L-shaped main pipe; 66. Drive motor; 67. Belt pulley one; 68. Spray pipe; 69. Belt pulley two; 610. Slide plate; 611. Elastic telescopic plate; 612. Circular groove plate; 613. Arc block wheel; 7. Blowing device; 71. Vertical frame; 72. Air pipe; 73. Connecting pipe; 74. Fixing ring; 75. Ring pipe; 76. Inclined air nozzle; 77. Blade; 8. Lifting device; 81. I-shaped rod; 82. Z-shaped push rod. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Please see Figure 1 - Figure 11One embodiment of the present invention is: a galvanized pipe cooling and passivation device, comprising a main body 1, a cooling pool 2, a passivation pool 3, and a secondary passivation device 6 sequentially arranged on the top of the main body 1, a driving assembly 4 disposed on the top of the main body 1, and a placement assembly 5 for placing rectangular tubes disposed on the moving end of the driving assembly 4, the secondary passivation device 6 comprising a passivation liquid pool 61 opened on the top of the main body 1, a shell 63 fixed on the top of the main body 1, and a pump 64 fixed on the outer wall of the main body 1, a filter screen 62 fixed above the inner wall of the passivation liquid pool 61, and the pump 64... The inlet extends into the passivation liquid pool 61. An L-shaped main pipe 65 is fixed to the top of the pump 64 and is fixed to the inner wall of the outer casing 63. Several spray pipes 68 are evenly and equidistantly mounted on the outer wall of the L-shaped main pipe 65. A pulley 67 is fixed to the outside of each spray pipe 68, and adjacent pulleys 67 are connected via belt drive. A drive motor 66 is fixed to the outer wall of the outer casing 63. A pulley 69 is fixed to the output end of the drive motor 66. The pulley 69 is connected to the pulley 67 corresponding to one of the spray pipes 68 via belt drive. The driving component 4 includes a crossbeam frame 41 fixed to the top of the main body 1. A screw 42 is rotatably connected inside the crossbeam frame 41 and is driven by a motor. A screw block 43 is threadedly connected to the outside of the screw 42 and is slidably installed inside the crossbeam frame 41. The screw block 43 is the driving end of the driving component 4. The placement component 5 includes an electric push rod 51 fixed at the screw block 43. A grooved plate 52 is fixed to the bottom of the telescopic end of the electric push rod 51. Several grooves are formed on the side wall of the grooved plate 52. A connecting plate 53 is vertically slidably installed inside the grooves of the grooved plate 52. A spring is provided between the plate 53 and the groove of the grooved plate 52. Several U-shaped frames 56 are evenly and equidistantly fixed on the top of the connecting plate 53. A placement column 54 is hinged inside the U-shaped frame 56. A baffle 55 is fixed on the outer wall of the placement column 54. The baffle 55 is used to limit the position of the square and rectangular tube at the placement column 54. With the above structure, the spray pipe 68 can spray passivating liquid onto the surface of the square and rectangular tube in a rotating manner, thereby realizing the secondary passivation operation on the surface of the square and rectangular tube. At the same time, it can ensure that the passivating liquid is evenly distributed, covering every corner of the square and rectangular tube, enhancing the passivation effect and reducing the phenomenon of missed spraying.

[0034] A rod 58 is horizontally inserted and slidably mounted inside the placement column 54. A sleeve 57 is fixed to the side of the rod 58 away from the U-shaped frame 56, and a spring is provided between the sleeve 57 and the outer wall of the placement column 54. A slot adapted to the rod 58 is opened on the inner wall of the U-shaped frame 56. The secondary passivation device 6 also includes a sliding plate 610 vertically slidably mounted inside the outer shell 63. A spring is provided between the sliding plate 610 and the inner wall of the outer shell 63. Several elastic telescopic plates 611 are evenly and equidistantly fixed on the top of the sliding plate 610. A circular groove plate 612 is fixed to the telescopic end of the elastic telescopic plate 611. A circular groove adapted to the sleeve 57 is provided on the outer wall of the plate 612. An arc block wheel 613 is fixed on the outer wall of the pulley 67 corresponding to the spray pipe 68 on one side. An arc block is fixed on the outer wall of the arc block wheel 613. The bottom of the slide plate 610 is located on the arc block movement trajectory of the arc block wheel 613. Through the above structure, the placement column 54 drives the square and rectangular tube placed on it to move up and down repeatedly. Through the up and down reciprocating movement, the square and rectangular tube can keep in contact with the spray pipe 68 in all directions, so that the passivation liquid can fully penetrate and cover the surface of the square and rectangular tube, and optimize the formation of the passivation film.

[0035] The outer casing 63 is equipped with a purging device 7, which includes a vertical frame 71 fixed to the top of the inner wall of the outer casing 63. An air pipe 72 is fixed to the bottom of the vertical frame 71 and is connected to an external air source. The air pipe 72 is wavy and has several connecting pipes 73 evenly and equidistantly fixed to its bottom. Each connecting pipe 73 has a fixing ring 74 fixed to its bottom. The fixing rings 74 are staggered. A ring pipe 75 is rotatably installed on the inner wall of the fixing ring 74. Several blades 77 are evenly fixed to the circumference of the inner wall of the ring pipe 75. Several oblique air nozzles 76 are evenly fixed to the circumference of the side of the ring pipe 75 near the spray pipe 68. The ring pipe 75 is connected to the interior of the air pipe 72 through the connecting pipes 73. With the above structure, the ring pipe 75 rotates and drives the oblique air nozzles 76 to purge the passivation liquid remaining on the surface of the rectangular tube. The rotational purging method can cover a wider area, thereby ensuring that every part of the surface of the rectangular tube is purged and reducing the possibility of residual liquid.

[0036] In use, the rectangular tube is placed outside the placement column 54. The operator drives the screw 42 to rotate via a motor. The screw 42, through the screw block 43, drives the electric push rod 51 to move. The operator then activates the electric push rod 51, which pushes the groove plate 52, connecting plate 53, and U-shaped frame 56, causing the placement column 54 to move downwards. When the placement column 54 is above the external galvanizing tank, it carries the rectangular tube into the tank for galvanizing. When the placement column 54 is above the cooling tank 2, it carries the tube into the cooling tank for cooling. When the placement column 54 is above the passivation tank 3, it carries the tube into the passivation tank for passivation. Finally, the screw 42, through the screw block 43 and the electric push rod 51... The grooved plate 52, connecting plate 53, and U-shaped frame 56 move the placement column 54 into the outer shell 63. That is, the placement column 54 moves the square and rectangular tube after the first passivation into the space between the two spray pipes 68. The passivation liquid in the passivation liquid pool 61 is drawn by the pump 64 and transmitted to the spray pipe 68 through the L-shaped main pipe 65. At the same time, the drive motor 66 drives the pulley 69 to rotate. The pulley 69 drives the pulley 67 on one side to rotate through the belt. Under the coordinated action of multiple belts, the pulley 67 drives the spray pipe 68 to rotate, so that the spray pipe 68 sprays the passivation liquid on the surface of the square and rectangular tube in a rotating manner, thereby realizing the secondary passivation operation on the surface of the square and rectangular tube. At the same time, it can ensure that the passivation liquid is evenly distributed, covering every corner of the square and rectangular tube, enhancing the passivation effect and reducing the phenomenon of missed spraying.

[0037] During each movement of the placement post 54 into the outer casing 63, the placement post 54 drives the sleeve 57 into the circular groove of the circular groove plate 612. As the placement post 54 continues to move, the circular groove plate 612 pushes against the sleeve 57, causing the insertion rod 58 to insert into the slot of the U-shaped frame 56. At this point, the placement post 54, the U-shaped frame 56, and the connecting plate 53 become a single unit. Then, as the placement post 54 continues to move, the sleeve 57 pushes the circular groove plate 612 against the telescopic end of the elastic telescopic plate 611, causing it to retract adaptively. When one pulley 67 rotates, it drives the arc-shaped block wheel 613 to rotate as well. The arc-shaped block of the arc-shaped block wheel 613 pushes the bottom of the slide plate 610, causing the slide plate 610 to move upwards. When the arc-shaped block of the arc-shaped block wheel 613 stops pushing the slide plate 610... At the bottom, under the combined action of the spring force corresponding to the slide plate 610 and the spring force between the groove plate 52 and the connecting plate 53, the slide plate 610 resets and moves downward. This process repeats, causing the slide plate 610 to drive the circular groove plate 612 to move up and down through the elastic telescopic plate 611. Since the placement column 54, the U-shaped frame 56, and the connecting plate 53 become a whole at this time, the circular groove plate 612 will drive the connecting plate 53 to move up and down along the groove of the groove plate 52 through the placement column 54 and the U-shaped frame 56. That is, the placement column 54 drives the square and rectangular tube placed on it to move up and down. Through the up and down movement, the square and rectangular tube can maintain contact with the spray pipe 68 in all directions, so that the passivation liquid can fully penetrate and cover the surface of the square and rectangular tube, optimizing the formation of the passivation film.

[0038] It should be noted that the excess passivating liquid sprayed out by the spray pipe 68 will fall back into the passivating liquid pool 61, thus facilitating the recycling of the passivating liquid. The filter screen 62 will filter the passivating liquid that falls back into the passivating liquid pool 61, thereby avoiding the problem of contamination of the passivating liquid in the passivating liquid pool 61.

[0039] After the secondary passivation of the rectangular tube is completed, the drive motor 66 and pump 64 are turned off, and the placement column 54 is moved out of the outer casing 63. During this process, the air pipe 72 is connected to an external air source. The external air source transmits air through the air pipe 72 and connecting pipe 73 to the inside of the ring pipe 75, and the ring pipe 75 transmits the air to the oblique air nozzle 76 for spraying. The air sprayed from the oblique air nozzle 76 will sweep away the passivation liquid remaining on the surface of the rectangular tube. When the passivation liquid remains on the surface of the rectangular tube, it will react with moisture or other substances in the air to form alkaline substances or other corrosive substances. By spraying air to remove it, the occurrence of this reaction can be reduced, thereby reducing the risk of alkalinity return to the rectangular tube. At the same time, when the air flows inside the ring pipe 75, the air will drive the blade 77 to rotate the ring pipe 75 at the fixed ring 74, so that the ring pipe 75 rotates and drives the oblique air nozzle 76 to sweep away the passivation liquid remaining on the surface of the rectangular tube. The rotational sweeping method can cover a wider area, thereby ensuring that every part of the surface of the rectangular tube is swept away, reducing the possibility of residual liquid.

[0040] It should be noted that, because the ring pipes 75 are staggered, the airflow emitted from the oblique nozzles 76 corresponding to each ring pipe 75 does not interfere with each other (e.g., Figure 9 (The direction of air ejection from the oblique nozzle 76 is shown).

[0041] Please see Figure 1 - Figure 11 Based on the above embodiments, in another embodiment of the present invention, a lifting device 8 is provided at both the cooling pool 2 and the passivation pool 3. The lifting device 8 includes two I-shaped rods 81 respectively fixed on both sides of the main body 1. A geometric push rod 82 is slidably installed between the outer walls of the two I-shaped rods 81. A spring is provided between the geometric push rod 82 and the I-shaped rod 81. The placement column 54 is located on the horizontal movement trajectory of the geometric push rod 82. Through the above structure, the geometric push rod 82 abuts against the placement column 54, causing the rectangular tube to be in an inclined state. The coolant or passivation liquid inside the rectangular tube can flow out smoothly when it is removed from the cooling pool 2 or the passivation pool 3, reducing liquid residue. This helps to avoid pollution problems in subsequent processes.

[0042] In use, each time the electric push rod 51 pushes the groove plate 52, connecting plate 53, and U-shaped frame 56 to move the placement column 54 downward into the cooling pool 2 or passivation pool 3, when the placement column 54 moves to the horizontal position of the geometric push rod 82, the geometric push rod 82 will push the bottom surface of the placement column 54 to swing the placement column 54 upward until the placement column 54 reaches the maximum tilt angle position (the placement column 54, along with the rectangular tube, becomes tilted due to its horizontal position). Afterward, as the placement column 54 continues to move downward, it will press the geometric push rod 82 downward along the outside of the I-shaped rod 81, and... The spring corresponding to the zigzag push rod 82 is compressed. Each time the placement column 54 moves out of the cooling pool 2 or passivation pool 3 with the rectangular tube, the zigzag push rod 82 is still in an inclined state against the placement column 54 with the rectangular tube. Therefore, the coolant or passivation liquid inside the rectangular tube can flow out smoothly, reducing liquid residue. This helps to avoid contamination problems in subsequent processes. During the cooling or passivation process, if the rectangular tube is in a horizontal state, liquid is easy to accumulate in the tube, causing unnecessary interference in subsequent processes. The inclined state promotes liquid flow and reduces the risk of liquid accumulation.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A galvanized pipe cooling and passivation device, comprising a main body (1), characterized in that: The top of the main body (1) of the equipment is provided with a cooling pool (2), a passivation pool (3), and a secondary passivation device (6) in sequence. The top of the main body (1) of the equipment is provided with a drive assembly (4). The moving end of the drive assembly (4) is provided with a placement assembly (5) for placing rectangular tubes. The secondary passivation device (6) includes a passivation liquid pool (61) opened on the top of the main body (1), a shell (63) fixed on the top of the main body (1), and a pump (64) fixed on the outer wall of the main body (1). A filter screen (62) is fixed above the inner wall of the passivation liquid pool (61). The inlet end of the pump (64) extends into the passivation liquid pool (61). Inside, an L-shaped main pipe (65) is fixed to the top of the pump (64), and the L-shaped main pipe (65) is fixed to the inner wall of the outer shell (63). Several spray pipes (68) are evenly and equidistantly installed on the outer wall of the L-shaped main pipe (65). A pulley (67) is fixed to the outside of the spray pipe (68). Two adjacent pulleys (67) are connected by belt drive. A drive motor (66) is fixed to the outer wall of the outer shell (63). A pulley (69) is fixed to the output end of the drive motor (66). The pulley (69) is connected to the pulley (67) corresponding to the spray pipe (68) on one side by belt drive.

2. The galvanized pipe cooling and passivation equipment according to claim 1, characterized in that: The drive assembly (4) includes a crossbeam frame (41) fixed to the top of the main body (1). A screw (42) is rotatably connected inside the crossbeam frame (41), and the screw (42) is driven by a motor. A screw block (43) is threadedly connected to the outside of the screw (42), and the screw block (43) is slidably installed inside the crossbeam frame (41). The screw block (43) is the drive end of the drive assembly (4).

3. The galvanized pipe cooling and passivation equipment according to claim 2, characterized in that: The placement assembly (5) includes an electric push rod (51) fixed at the screw block (43). A grooved plate (52) is fixed at the bottom of the telescopic end of the electric push rod (51). Several grooves are provided on the side wall of the grooved plate (52). A connecting plate (53) is vertically slidably installed inside the groove of the grooved plate (52). A spring is provided between the connecting plate (53) and the groove of the grooved plate (52). Several U-shaped frames (56) are evenly and equidistantly fixed on the top of the connecting plate (53). A placement column (54) is hinged inside the U-shaped frame (56). A baffle (55) is fixed on the outer wall of the placement column (54). The baffle (55) is used to limit the position of the rectangular tube at the placement column (54).

4. The galvanized pipe cooling and passivation equipment according to claim 3, characterized in that: The placement column (54) has a horizontally penetrating and slidingly installed insertion rod (58). A sleeve (57) is fixed on the side of the insertion rod (58) away from the U-shaped frame (56), and a spring is provided between the sleeve (57) and the outer wall of the placement column (54). A slot adapted to the insertion rod (58) is opened on the inner wall of the U-shaped frame (56).

5. The galvanized pipe cooling and passivation equipment according to claim 4, characterized in that: The secondary passivation device (6) further includes a slide plate (610) that is vertically slidably installed inside the outer shell (63). A spring is provided between the slide plate (610) and the inner wall of the outer shell (63). Several elastic telescopic plates (611) are evenly and equidistantly fixed on the top of the slide plate (610). A circular groove plate (612) is fixed at the telescopic end of the elastic telescopic plate (611). A circular groove that matches the sleeve (57) is opened on the outer wall of the circular groove plate (612). An arc block wheel (613) is fixed on the outer wall of the pulley (67) corresponding to the spray pipe (68) on one side.

6. The galvanized pipe cooling and passivation equipment according to claim 5, characterized in that: An arc block is fixed to the outer wall of the arc block wheel (613), and the bottom of the slide plate (610) is located on the arc block movement trajectory of the arc block wheel (613).

7. The galvanized pipe cooling and passivation equipment according to claim 1, characterized in that: The shell (63) is equipped with a purging device (7). The purging device (7) includes a vertical frame (71) fixed to the top of the inner wall of the shell (63). The bottom of the vertical frame (71) is fixed with an air pipe (72), and the air pipe (72) is connected to an external air source. The air pipe (72) is wavy. Several connecting pipes (73) are evenly and equidistantly fixed at the bottom of the air pipe (72). The bottom of each connecting pipe (73) is fixed with a fixing ring (74). The fixing rings (74) are staggered. A ring pipe (75) is rotatably installed on the inner wall of the fixing ring (74). Several blades (77) are evenly fixed on the circumference of the inner wall of the ring pipe (75). Several oblique air nozzles (76) are evenly fixed on the circumference of the side of the ring pipe (75) near the spray pipe (68).

8. The galvanized pipe cooling and passivation equipment according to claim 7, characterized in that: The ring tube (75) is connected to the interior of the trachea (72) via the connecting tube (73).

9. The galvanized pipe cooling and passivation equipment according to claim 3, characterized in that: Both the cooling pool (2) and the passivation pool (3) are equipped with lifting devices (8). The lifting devices (8) include two I-shaped rods (81) fixed on both sides of the main body of the equipment (1). A geometric push rod (82) is slidably installed between the outer walls of the two I-shaped rods (81). A spring is provided between the geometric push rod (82) and the I-shaped rod (81).

10. A galvanized pipe cooling and passivation device according to claim 9, characterized in that: The placement column (54) is located on the horizontal movement trajectory of the geometric push rod (82).

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