Longitudinal immersion type cooling equipment and method for galvanized section steel
Through longitudinal immersion cooling equipment and methods, the problems of complexity of cooling methods and uneven cooling in the prior art are solved, and uniform and efficient cooling of steel and product quality improvement are achieved.
Patent Information
- Application Number
- CN202411314339.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-13
AI Technical Summary
The existing galvanized cooling method of steel galvanized increases equipment complexity and affects product surface quality when the direction of the production line changes, while the spray cooling method has problems such as insufficient cooling strength and uneven cooling.
Using longitudinal immersion cooling equipment and methods, the uniform and efficient cooling of the steel is achieved through cooling tank body, front and rear profiling plates, guide devices, transmission devices, water tanks, water pumps, coolers and other components, and the time when the steel is exposed to the air is reduced. , and realize precise cooling effect control through automatic control system.
The uniform and efficient cooling of the steel is achieved, which reduces the complexity of equipment and the difficulty of process layout, and precise cooling effect control is achieved through the automatic control system, improving product quality.
Smart Images
Figure CN119121094A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to longitudinal immersion cooling equipment and method for galvanized section steel, belonging to the technical field of cooling section steel after galvanizing in the hot-dip galvanizing industry. Background Art
[0002] Hot-dip galvanizing is one of the most effective means to delay environmental corrosion of steel materials. It is to immerse the steel products after cleaning and activation in molten zinc liquid, and through the reaction and diffusion between iron and zinc, a zinc alloy coating with good adhesion is plated on the surface of the steel products. Hot-dip galvanizing of steel is one of the important hot-dip galvanizing products. In the production process of galvanizing steel, the cooling link is crucial to ensure product quality. At present, the commonly used cooling methods include immersion cooling and spray cooling, but both have certain technical problems and limitations. In the production process of galvanizing steel, the cooling of steel parts is an important link. At present, for the cooling of steel, one method is to use oblique water entry and water exit for immersion cooling, for example: Chinese patent CN2018214162522 name "A cooling device for hot-dip galvanizing of steel", etc. However, this method needs to turn 90° and then enter the water horizontally when the production line moves along the length of the steel, which prolongs the exposure time of the steel to the air, increases the complexity of the equipment and affects the surface quality of the product. Another method is to use spray cooling, such as Chinese patent CN2021220834162 "Uniform cooling structure of cooling device for processing galvanized steel lined corrugated steel plate", etc. However, this method has low cooling intensity and is prone to uneven cooling, causing bending of the steel. In summary, the immersion cooling method of the prior art increases the complexity of the equipment and affects the surface quality of the product when the movement direction of the production line changes, and the spray cooling method has the problems of insufficient cooling intensity and uneven cooling. Summary of the invention
[0003] The object of the present invention is to provide a longitudinal immersion cooling device and method for galvanized steel sections. Through the longitudinal immersion cooling method, uniform and efficient cooling of the steel sections is achieved, the time the steel sections are exposed to the air is reduced, and the product quality is improved; the complexity of the equipment and the difficulty of the process layout are reduced, and accurate cooling effect control can be achieved through an automatic control system, thereby solving the above-mentioned technical problems existing in the background technology.
[0004] The technical solution of the present invention is: A longitudinal immersion cooling device for galvanized steel, comprising a cooling tank, a front profiling plate, a front guide device, a transmission device, a water tank, a water pump, a cooler, a rear profiling plate and a rear guide device, a roller conveyor for conveying steel is arranged in the cooling tank, the roller conveyor is driven by the transmission device, a water inlet and a water return port are arranged on the cooling tank, a water outlet pipe at the bottom of the water tank is connected to the water inlet through a water pump and a cooler, and the water return port is connected to the water return pipe at the top of the water tank; a steel inlet and a steel outlet are arranged at the front and rear ends of the cooling tank respectively, and the cooling tank A front guide device and a front profiling plate are sequentially arranged at the front end of the roller conveyor device inside the body along the moving direction of the profiled steel, and a rear guide device and a rear profiling plate are sequentially arranged at the rear end of the roller conveyor device along the moving direction of the profiled steel; the front guide device and the rear guide device have the same structure, both of which include a cylinder, an upper partition, a longitudinal partition and a lower partition. The cylinder is divided into a plurality of horizontally penetrating spaces by a plurality of longitudinal partitions, and a horizontal profiled steel channel is formed in the space by the upper partition and the lower partition. The profiled steel channel is in a trumpet shape, and the profiled steel guide entrance of the profiled steel channel The front profiling plate and the rear profiling plate have the same structure, and both have a plurality of horizontally arranged profiling holes for the profiled steel on the profiling plate body, and the profiling holes for the profiled steel match the shape of the guide outlet for the profiled steel, and the profiling holes for the profiled steel are close to the guide outlet for the profiled steel, so as to facilitate the passage of the profiled steel; the front profiling plate and the rear profiling plate are arranged perpendicular to the moving direction of the profiled steel, and the interior of the cooling trough body is divided into three areas, the area between the front profiling plate and the rear profiling plate is the water-filled section, and the front profiling plate and the rear profiling plate are the water-filled section. The area between the profiling plate and the steel inlet is the front water return section, the area between the rear profiling plate and the steel outlet is the rear water return section, multiple water inlets are arranged on the side wall of the cooling trough water filling section, multiple water return ports are respectively arranged on the bottom of the cooling trough in the front and rear water return sections, and the water tank, water pump and cooler are arranged outside the cooling trough; the hot-dip galvanized steel workpiece enters the cooling trough through the steel inlet, the transmission device drives the roller conveyor to transport the steel workpiece in the longitudinal direction, and the cooling is achieved by the cooling water in the cooling trough; the cooled steel workpiece leaves the cooling trough through the steel outlet.
[0005] The cooling trough body is provided with an overflow port, which is arranged on the side wall of the water filling section of the cooling trough body and close to the inlet position of the steel section.
[0006] The front guide device and the rear guide device are used to ensure that the steel workpiece can pass through the front profiling plate and the rear profiling plate; the front profiling plate and the rear profiling plate mainly function to ensure that the cooling liquid level can be established in the cooling tank body so that the steel workpiece is below the cooling liquid level.
[0007] The bottom of the cylinder is arranged on a mounting base plate through a support plate, and is mounted in the cooling tank body through the mounting base plate.
[0008] The roller conveyor device comprises a plurality of rollers, the transmission device is installed outside the cooling tank body, the rollers are connected via roller chains, and the rollers are installed inside the cooling tank body.
[0009] A plurality of steel profiled holes on the profiled plate body are interconnected to form an integral through hole.
[0010] The roller is provided with partitions, which divide the roller surface of the roller into a plurality of slots for the steel sections to pass through, so that the steel section workpiece can be transmitted in the longitudinal direction.
[0011] The number of spaces penetrating in the horizontal direction on the cylinder matches the number of the profiled holes of the profiled steel and the grooves on the rollers of the roller table.
[0012] The cooling trough body is provided with a trough cover, which is buckled on the upper part of the cooling trough body. The trough cover is provided with a chimney, which is installed on the trough cover close to the steel inlet.
[0013] A compressed air purge beam is installed in the cooling tank body, and the compressed air purge beam is installed in the rear return water section of the cooling tank body close to the steel outlet.
[0014] A longitudinal immersion cooling method for galvanized steel, using the above-mentioned equipment, comprises the following steps: After hot-dip galvanizing, the steel workpiece enters the cooling trough through the steel inlet, and the transmission device drives the roller conveyor to transport the steel workpiece longitudinally, passing through the front guide device, the front profiling plate, the rear guide device and the rear profiling plate in sequence; Low-temperature cooling water enters the water filling section of the cooling tank through the water inlet, and forms high-temperature cooling water after heat exchange with the high-temperature steel workpiece. A part of it enters the return water section through the steel profiling holes on the front profiling plate and the rear profiling plate, and flows to the return water port; the other part merges with the return water port through the overflow port and flows back to the water tank; The high-temperature cooling water is transported to the cooler through a water pump. The cooler realizes heat exchange between the high-temperature cooling water and the low-temperature circulating water to obtain low-temperature cooling water, which enters the cooling tank through the water inlet to realize the circulation of cooling water. The cooled steel workpiece leaves the cooling trough through the steel outlet to complete cooling.
[0015] The positions of the front profiling plate and the rear profiling plate are adjustable to adjust the size of the water-filled section in the cooling tank body; the sizes of the profiled steel holes on the front profiling plate and the rear profiling plate are adjustable to control the flow and distribution of cooling water by adjusting the aperture size of the profiled steel holes, thereby further optimizing the cooling effect.
[0016] The water vapor generated by cooling the steel workpiece is condensed through a chimney and then recycled.
[0017] The longitudinal direction mentioned in the present invention is the length direction of the steel section.
[0018] The present invention is provided with a temperature monitoring device and an automatic control system to monitor the water temperature in the cooling water tank and the temperature of the steel workpiece in real time, and automatically adjust the circulating water volume and the roller speed according to the set value to achieve accurate cooling effect control.
[0019] After the steel workpiece enters the cooling trough, the cooling time and cooling temperature are set and determined according to the processing information of the steel workpiece, and the cooling time is ensured by controlling the speed of the roller. A steel workpiece temperature measuring device is provided at the steel inlet and the steel outlet of the cooling trough. By detecting the temperature of the steel workpiece entering and leaving the cooling trough, the roller speed, the cooling water volume and the circulating water volume are dynamically corrected to ensure that the steel workpiece completes the cooling process according to the cooling model.
[0020] The positive effects of the present invention are as follows: uniform and efficient cooling of the steel section is achieved through the longitudinal immersion cooling method, the time the steel section is exposed to the air is reduced, and the product quality is improved; the equipment complexity and the difficulty of process layout are reduced, and accurate cooling effect control can be achieved through the automatic control system. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a three-dimensional view of an embodiment of the present invention; Figure 2 yes Figure 1 The main view; Figure 3 yes Figure 1 A top view of Figure 4 yes Figure 1 Left view of Figure 5 The cooling water tank and the inner edge of the embodiment of the present invention are Figure 4 Section view in the AA direction; Figure 6 The cooling water tank and the inner edge of the embodiment of the present invention are Figure 2 Cross-sectional view in the middle BB direction; Figure 7 The cooling water tank and the inner edge of the embodiment of the present invention are Figure 2 Cross-sectional view in CC direction; Figure 8 The cooling water tank and the inner edge of the embodiment of the present invention are Figure 2 Cross-sectional view in the middle DD direction; Fig. 9 Embodiment of the present invention Figure 5 Magnified end view; Fig.10 Embodiment of the present invention Figure 6 Magnified end view; Fig.11 is a schematic diagram of a profiling plate according to an embodiment of the present invention; Fig.12is a schematic diagram of a guide device according to an embodiment of the present invention; Fig.13 is a stereoscopic diagram of a guide device according to an embodiment of the present invention; In the figure: cooling trough body 1, front profiling plate 2, front guide device 3, roller 4, water inlet 5, return water outlet 6, overflow port 7, transmission device 8, water tank 9, water pump 10, cooler 11, trough cover 12, chimney 13, compressed air purge beam 14, rear profiling plate 15, rear guide device 16, steel inlet 17, partition 18, slot 19, cylinder 20, upper partition 21, longitudinal partition 22, steel guide outlet 23, lower partition 24, support plate 25, steel guide inlet 26, installation base plate 27, profiling plate body 28, steel profiling hole 29. DETAILED DESCRIPTION
[0022] The present invention will be further described below through embodiments in conjunction with the accompanying drawings.
[0023] A longitudinal immersion cooling device for galvanized steel, comprising a cooling trough 1, a front profiling plate 2, a front guide device 3, a transmission device 8, a water tank 9, a water pump 10, a cooler 11, a rear profiling plate 15 and a rear guide device 16, a roller conveyor for conveying steel is arranged in the cooling trough 1, and the roller conveyor is driven by the transmission device 8, a water inlet 5 and a water return port 6 are arranged on the cooling trough 1, a water outlet pipe at the bottom of the water tank 9 is connected to the water inlet 5 through the water pump 10 and the cooler 11, and the water return port 6 is connected to the water return pipe at the top of the water tank 9; the front and rear ends of the cooling trough 1 are respectively provided with a steel inlet 17 and a steel outlet The front end of the roller conveyor device inside the cooling trough 1 is provided with a front guide device 3 and a front profiling plate 2 in sequence along the moving direction of the profiled steel, and the rear end of the roller conveyor device is provided with a rear guide device 16 and a rear profiling plate 15 in sequence along the moving direction of the profiled steel; the front guide device 3 and the rear guide device 16 have the same structure, both of which include a cylinder 20, an upper partition 21, a longitudinal partition 22 and a lower partition 24. The cylinder 20 is divided into a plurality of horizontally penetrating spaces by a plurality of longitudinal partitions 22, and a horizontal profiled steel channel is formed in the space by the upper partition 21 and the lower partition 24. The profiled steel channel is in a bell-mouth shape, and the profiled steel channel is The steel guide inlet 26 is relatively wide, and the steel guide outlet 23 is relatively narrow. The shape of the steel guide outlet 23 matches the cross-sectional shape of the steel to be cooled; the front profiling plate 2 and the rear profiling plate 15 have the same structure, and both have a plurality of horizontally arranged steel profiling holes 29 on the profiling plate body 28. The steel profiling holes 29 match the shape of the steel guide outlet 23. The steel profiling holes 29 are close to the steel guide outlet 23, which is convenient for the steel to pass through; the front profiling plate 2 and the rear profiling plate 15 are arranged perpendicular to the moving direction of the steel, dividing the interior of the cooling trough 1 into three areas, and the front profiling plate 2 and the rear profiling plate 15 are arranged between The area is the water filling section, the area between the front profiling plate 2 and the steel inlet 17 is the front water return section, the area between the rear profiling plate 15 and the steel outlet is the rear water return section, multiple water inlets 5 are arranged on the side wall of the water filling section of the cooling trough body 1, multiple water return ports 6 are respectively arranged on the bottom of the cooling trough body 1 in the front and rear water return sections, a water tank 9, a water pump 10 and a cooler 11 are arranged outside the cooling trough body 1; the hot-dip galvanized steel workpiece enters the cooling trough body through the steel inlet, the transmission device drives the roller conveyor to transport the steel workpiece in the longitudinal direction, and the cooling is achieved by the cooling water in the cooling trough body; the cooled steel workpiece leaves the cooling trough body through the steel outlet.
[0024] The cooling trough body 1 is provided with an overflow port 7 , which is arranged on the side wall of the water filling section of the cooling trough body 1 , close to the steel section inlet 17 .
[0025] The front guide device 3 and the rear guide device 16 are used to ensure that the steel workpiece can pass through the front profiling plate 2 and the rear profiling plate 15; the front profiling plate 2 and the rear profiling plate 15 mainly function to ensure that the cooling liquid level can be established in the cooling trough body 1 so that the steel workpiece is below the cooling liquid level.
[0026] The bottom of the cylinder 20 is arranged on a mounting base plate 27 via a support plate 25 , and is mounted in the cooling tank body 1 via the mounting base plate 27 .
[0027] The roller conveyor device comprises a plurality of rollers 4 , the transmission device 8 is installed outside the cooling trough body 1 , and is connected to the rollers 4 via a roller chain, and the rollers 4 are installed inside the cooling trough body 1 .
[0028] The plurality of steel profiled holes 29 on the profiled plate body 28 are interconnected to form an integral through hole.
[0029] The roller 4 is provided with a partition 18, which divides the roller surface of the roller into a plurality of grooves 19 for the steel sections to pass through, so that the steel sections can be transported in the longitudinal direction.
[0030] The number of spaces penetrating in the horizontal direction on the cylinder 20 matches the number of the profiled holes 29 of the profiled steel and the grooves 19 on the roller 4 .
[0031] The cooling trough body 1 is provided with a trough cover 12 , which is buckled on the upper part of the cooling trough body 1 . The trough cover 12 is provided with a chimney 13 , which is installed on the trough cover 12 near the steel inlet 17 .
[0032] A compressed air purge beam 14 is installed in the cooling trough body 1 , and the compressed air purge beam 14 is installed in the rear return water section of the cooling trough body 1 close to the steel outlet.
[0033] The steel workpiece in this embodiment is an angle steel.
[0034] A longitudinal immersion cooling method for galvanized steel, using the above-mentioned equipment, comprises the following steps: The motor of the transmission device 8 rotates, and drives the multiple sets of rollers 4 to rotate through the roller chain, so that the steel workpiece is transmitted in the longitudinal direction. The front guide device 3 and the rear guide device 16 are respectively installed on the entrance side of the front profiling plate 2 and the rear profiling plate 15, so that the steel workpiece can pass through accurately. The steel profiling holes 29 on the front profiling plate 2 and the rear profiling plate 15 are consistent with the cross-sectional shape of the steel workpiece, and the size is slightly larger; The low-temperature cooling water enters the water filling section of the cooling tank body 1 through the water inlet 5, and forms high-temperature cooling water after heat exchange with the high-temperature steel workpiece. A part of the cooling water enters the return water section through the steel profiling holes 29 on the front profiling plate 2 and the rear profiling plate 15, and flows to the return water port 6; the other part of the cooling water flows back to the water tank 9 through the overflow port 7 and the return water port 6. The high-temperature cooling water is transported to the cooler 11 through the water pump 10. The cooler 11 realizes heat exchange between the high-temperature cooling water and the low-temperature circulating water to obtain low-temperature cooling water, which enters the cooling tank body 1 through the water inlet 5 to realize the circulation of cooling water.
[0035] The positions of the front profiling plate 2 and the rear profiling plate 15 are adjustable to adjust the size of the water-filled section in the cooling trough body 1; the sizes of the profiled steel holes on the front profiling plate 2 and the rear profiling plate 15 are adjustable to control the flow and distribution of cooling water by adjusting the aperture size of the profiled steel holes, thereby further optimizing the cooling effect.
[0036] The water vapor generated by cooling the steel workpiece is condensed through the chimney 13 and then recycled.
[0037] The present invention is provided with a temperature monitoring device and an automatic control system to monitor the water temperature in the cooling water tank and the temperature of the steel workpiece in real time, and automatically adjust the circulating water volume and the roller speed according to the set value to achieve accurate cooling effect control.
[0038] After the steel workpiece enters the cooling trough, the cooling time and cooling temperature are set and determined according to the processing information of the steel workpiece, and the cooling time is ensured by controlling the speed of the roller. A steel workpiece temperature measuring device is provided at the steel inlet and the steel outlet of the cooling trough. By detecting the temperature of the steel workpiece entering and leaving the cooling trough, the roller speed, the cooling water volume and the circulating water volume are dynamically corrected to ensure that the steel workpiece completes the cooling process according to the cooling model.
[0039] The roller conveyor can be chain-type or belt-type transmission; the front profiling plate 2 and the rear profiling plate 15 can be made of different materials and processes to improve durability and precision.
Claims
1. A longitudinal immersion cooling device for galvanized steel, characterized in that: The invention comprises a cooling trough body (1), a front profiling plate (2), a front guide device (3), a transmission device (8), a water tank (9), a water pump (10), a cooler (11), a rear profiling plate (15) and a rear guide device (16). A roller conveyor for conveying profiled steel is arranged in the cooling trough body (1), and the roller conveyor is driven by the transmission device (8). A water inlet (5) and a water return port (6) are arranged on the cooling trough body (1). A water outlet pipe at the bottom of the water tank (9) is connected to the water inlet (5) through the water pump (10) and the cooler (11), and the water return port (6) is connected to the water return pipe at the top of the water tank (9). The front and rear ends of the cooling trough body (1) are respectively provided with a profiled steel inlet (17) and a profiled steel outlet. A front guide device (3) and a front profiling plate (2) are sequentially arranged at the front end of the roller conveyor device inside the cooling trough body (1) along the moving direction of the profiled steel, and a rear guide device (16) and a rear profiling plate (15) are sequentially arranged at the rear end of the roller conveyor device along the moving direction of the profiled steel; the front guide device (3) and the rear guide device (16) have the same structure, both comprising a cylinder (20), an upper partition (21), a longitudinal partition (22) and a lower partition (24); the cylinder (20) is divided into a plurality of horizontally penetrating spaces by a plurality of longitudinal partitions (22); a horizontal profiled steel channel is formed in the space by the upper partition (21) and the lower partition (24); the profiled steel channel is in a bell-mouth shape; The steel guide inlet (26) is relatively wide, and the steel guide outlet (23) is relatively narrow. The shape of the steel guide outlet (23) matches the cross-sectional shape of the steel to be cooled. The front profiling plate (2) and the rear profiling plate (15) have the same structure. Both of them have a plurality of horizontally arranged steel profiling holes (29) opened on the profiling plate body (28). The steel profiling holes (29) match the shape of the steel guide outlet (23). The steel profiling holes (29) are close to the steel guide outlet (23) to facilitate the passage of the steel. The front profiling plate (2) and the rear profiling plate (15) are arranged perpendicular to the moving direction of the steel, and divide the interior of the cooling trough body (1) into three areas. The front profiling plate (2) and the rear profiling plate The area between the front profiling plate (2) and the steel inlet (17) is a water filling section, the area between the rear profiling plate (15) and the steel outlet is a rear water return section, a plurality of water inlets (5) are arranged on the side wall of the water filling section of the cooling trough body (1), a plurality of water return ports (6) are respectively arranged on the bottom of the cooling trough body (1) at the front and rear water return sections, a water tank (9), a water pump (10) and a cooler (11) are arranged outside the cooling trough body (1); the steel workpiece after hot dip galvanizing enters the cooling trough body through the steel inlet, the transmission device drives the roller conveyor device to transport the steel workpiece in the longitudinal direction, and the cooling is achieved by the cooling water in the cooling trough body; the cooled steel workpiece leaves the cooling trough body through the steel outlet.
2. The longitudinal immersion cooling equipment for galvanized steel according to claim 1, characterized in that: The cooling trough body (1) is provided with an overflow port (7), which is arranged on the side wall of the water filling section of the cooling trough body (1) and close to the section steel inlet (17).
3. A longitudinal immersion cooling device for galvanized steel according to claim 1 or 2, characterized in that: The bottom of the cylinder (20) is arranged on a mounting base plate (27) via a support plate (25), and is mounted in the cooling tank body (1) via the mounting base plate (27).
4. A longitudinal immersion cooling device for galvanized steel according to claim 1 or 2, characterized in that: The roller conveyor device comprises a plurality of rollers (4); the transmission device (8) is mounted on the outside of the cooling trough body (1) and connected to the rollers (4) via a roller chain; and the rollers (4) are mounted inside the cooling trough body (1).
5. A longitudinal immersion cooling device for galvanized steel according to claim 1 or 2, characterized in that: A plurality of steel profiled holes (29) on the profiled plate body (28) are interconnected to form an integral through hole.
6. The longitudinal immersion cooling equipment for galvanized steel according to claim 4, characterized in that: The roller (4) is provided with a partition (18) which divides the roller surface of the roller into a plurality of slots (19) for facilitating the passage of the steel sections, thereby enabling the steel section workpiece to be transported in the longitudinal direction.
7. A longitudinal immersion cooling device for galvanized steel according to claim 1 or 2, characterized in that: The cooling trough body (1) is provided with a trough cover (12), the trough cover (12) is buckled on the upper part of the cooling trough body (1), and the trough cover (12) is provided with a chimney (13), and the chimney (13) is installed on the trough cover (12) near the steel inlet (17).
8. A longitudinal immersion cooling device for galvanized steel according to claim 1 or 2, characterized in that: A compressed air purge beam (14) is installed in the cooling trough body (1), and the compressed air purge beam (14) is installed in a rear return water section close to a steel section outlet in the cooling trough body (1).
9. A method for longitudinal immersion cooling of galvanized steel, using the longitudinal immersion cooling equipment for galvanized steel according to any one of claims 1 to 3, characterized in that The following steps are included: After hot-dip galvanizing, the steel workpiece enters the cooling trough (1) through the steel inlet (17), and the transmission device (8) drives the roller conveyor device to transport the steel workpiece in the longitudinal direction, passing through the front guide device (3), the front profiling plate (2), the rear guide device (16) and the rear profiling plate (15) in sequence; Low-temperature cooling water enters the water filling section of the cooling tank body (1) through the water inlet (5), and forms high-temperature cooling water after heat exchange with the high-temperature steel workpiece. A portion of the cooling water enters the return water section through the steel profile holes (29) on the front profile plate (2) and the rear profile plate (15), and flows to the return water port (6); the other portion of the cooling water flows back to the water tank (9) through the overflow port (7) and merges with the return water port (6). The high-temperature cooling water is transported to the cooler (11) through the water pump (10). The cooler (11) realizes heat exchange between the high-temperature cooling water and the low-temperature circulating water to obtain low-temperature cooling water, which enters the cooling tank (1) through the water inlet (5) to realize the circulation of the cooling water. The cooled steel workpiece leaves the cooling tank (1) through the steel outlet, completing cooling.
10. A longitudinal immersion cooling method for section steel after galvanizing according to claim 9, characterized in that: The positions of the front profiling plate (2) and the rear profiling plate (15) are adjustable to adjust the size of the water-filled section in the cooling trough body (1); the sizes of the profiled steel holes on the front profiling plate (2) and the rear profiling plate (15) are adjustable to control the flow and distribution of cooling water by adjusting the aperture size of the profiled steel holes.