Steel coil cooling device and cooling method

Abstract

The invention provides a steel coil cooling device and a cooling method.The steel coil cooling device comprises a conveying mechanism, spraying systems and a water storage unit, the conveying mechanism is laid on the ground, the spraying systems are vertically arranged on the two sides of the conveying mechanism, the water storage unit is connected to one end of the conveying mechanism, and the conveying mechanism comprises a guide rail and a rail car; a plurality of containing grooves and connecting channels are formed in the top face of the guide rail at equal intervals, the spraying system comprises lifting plugs, the lifting plugs are arranged in the containing grooves and used for pressing the lifting plugs downwards when the rail car moves, a water inlet of the spraying system is opened, and the spraying system cools a steel coil. The used cold water can flow back into the water storage unit to be filtered and then recycled. According to the cooling device provided by the invention, continuous and rapid cooling of a plurality of steel coils is realized, the production efficiency is improved, and cyclic utilization can be realized by recycling spray water.

Description

Technical Field

[0001] This invention relates to the field of stainless steel processing, and more particularly to a steel coil cooling device and cooling method. Background Technology

[0002] With the rapid development of China's steel industry, related upstream and downstream industries are often clustered in industrial zones to reduce transit time and save on transportation costs. Upstream steel companies extract metals from ore and press them into coils (commonly known as white coils or steel coils) for downstream companies. After the steel coils exit the furnace, their surface temperature is too high. After being transported to the downstream rolling mill, they need to be cooled, such as by rinsing with clean water to lower the temperature; otherwise, the high temperature will damage the rolling equipment. Cooling of white coils is commonly achieved by cold water spraying, usually manually using water guns. This method relies heavily on manual operation, is labor-intensive, and inefficient. Alternatively, the steel coils can be moved to the spraying area and sprayed through spray nozzles, but the opening and closing of the spray nozzles is mainly controlled manually. Sometimes, the nozzles are not closed promptly after spraying, resulting in water waste. Summary of the Invention

[0003] In view of the above, the present invention needs to provide a steel coil cooling device that improves cooling efficiency and avoids wasting water resources, which can automatically open the nozzle after the steel coil is lowered and automatically close the nozzle when it leaves.

[0004] A steel coil cooling device includes a conveying mechanism and a spraying system. The conveying mechanism is laid on the ground, and the spraying system is erected on both sides of the conveying mechanism.

[0005] The conveying mechanism includes two parallel conveying tracks, a guide rail located in the middle of the conveying tracks, and several railcars installed on the conveying tracks.

[0006] The top surface of the guide rail is provided with a plurality of receiving grooves at intervals, and the bottom surface of the receiving grooves is provided with a downwardly extending connecting channel;

[0007] The railcar includes a support platform, a base plate, and a tension spring. The support platform has a lifting through hole. The base plate includes a plate body and a protruding post integrally formed on the plate body. The protruding post protrudes into the lifting through hole of the support platform. The tension spring is connected between the bottom surface of the support platform and the base plate.

[0008] The spray system includes a water supply pipe, a lifting plug, and a spray pipe. The water supply pipe is installed inside the guide rail and extends along the guide rail, and is connected to several connecting channels. Several water supply holes are opened on both sides of the water supply pipe. The lifting plug is installed in the receiving groove and can be raised and lowered. The lifting plug extends into the water supply pipe and seals the corresponding water supply hole. The spray pipe is installed on both sides of the conveying rail and is connected to the water supply holes on both sides of the water supply pipe.

[0009] A spring is installed between the lifting plug and the bottom surface of the guide rail receiving groove, and the spring supports the lifting plug to protrude from the surface of the guide rail.

[0010] Furthermore, the lifting plug includes an upper crossbeam, a connecting rod vertically connected to the crossbeam, and a sealing head connected to the lower end of the connecting rod. The crossbeam is set in the receiving groove, the connecting rod is sleeved in the connecting channel of the guide rail, and the two ends of the sealing head correspond to the corresponding water supply holes in the water supply pipe.

[0011] Furthermore, one end of the base plate is formed with a wedge-shaped angle, and both ends of the crossbeam are set with arc surfaces, so that when the plate slides over the lifting plug, the wedge-shaped angle of the plate presses against the arc surface of the crossbeam.

[0012] Furthermore, the steel coil cooling device also includes an impurity pool, a clear water pool, a reflux trough, and a filtration structure. A water supply pump is installed in the clear water pool to transport the cold water in the clear water pool to the water supply pipeline. The reflux trough is set on both sides of the conveying mechanism. The filtration structure includes upper and lower filter channels. The upper filter channel is set at the top of the reflux trough and connects to the impurity pool. The lower filter channel is set in the reflux trough and connects to the clear water pool.

[0013] Furthermore, the conveying mechanism comprises multiple railcars arranged on the conveying track, each used to install the steel coils to be cooled, and the multiple railcars move sequentially from one end of the conveying track to the other end.

[0014] Furthermore, the conveying mechanism includes transverse tracks at both ends of the conveying track and return tracks parallel to the conveying track and connected to the transverse tracks at both ends, thereby forming a circular railcar conveying system. The conveying track, transverse tracks, and return tracks are all equipped with corresponding thrust devices to propel the railcar.

[0015] Furthermore, the bottom surface of the support platform is provided with a clamping groove along the sliding direction, the two ends of the support platform overlap on the two conveying rails, the clamping groove clamps on the guide rail, the bottom plate and the tension spring are installed in the clamping groove, the lifting through hole of the support platform is connected to the clamping groove, and the protrusion of the bottom plate extends upward through the lifting through hole and out of the support platform.

[0016] Furthermore, the top surface of the support platform forms an arc-shaped groove, and the lifting through hole is opened at the center of the arc-shaped groove. The top surface of the protruding column is a concave arc surface that matches the arc-shaped groove.

[0017] Furthermore, the present invention provides a cooling method for the aforementioned steel coil cooling device, the method comprising the following steps:

[0018] (1) The steel coil is placed on the railcar. The railcar moves along the conveying track to the other end. The steel coil presses against the bearing platform. The protrusions pressing against the bottom plate will push the bottom plate to move downward. The plate drops to a preset height.

[0019] (2) When the railcar moves to the lifting plug of the guide rail, the plate of the bottom plate will contact the raised lifting plug on the guide rail and press the lifting plug downward. The lifting plug opens the water supply hole, thereby opening the water inlet at the lower end of the spray pipe. The cold water in the water supply pipe enters the spray pipe to cool the passing steel coil.

[0020] (3) As the railcar moves, when the railcar reaches the lifting plug at a certain point on the guide rail, it will press against the lifting plug and drive the corresponding spray pipe to spray. After the steel coil is sprayed by the pairs of spray pipes on both sides of the conveying mechanism, it will be cooled down and then moved out from the other end of the conveying mechanism.

[0021] Compared to existing technologies, the steel coil cooling device of this invention features a liftable base plate mounted on a railcar. When pressed by the steel coil, the base plate lowers. As the railcar carries the coil, the base plate presses against a lifting plug protruding on the guide rail, connecting the water supply pipe to the spray pipe. Cold water is sprayed to cool the steel coil on the railcar. After the railcar passes, the lifting plug automatically returns to its original position, disconnecting the water supply pipe from the spray pipe, allowing for timely shutdown of the spray and saving water resources. Furthermore, multiple railcars can be installed on the conveying rail and move sequentially from one end to the other to spray, significantly improving cooling efficiency. Attached Figure Description

[0022] Figure 1 This is a perspective view of a steel coil cooling device according to a preferred embodiment of the present invention;

[0023] Figure 2 This is a front sectional view of the end of the steel coil cooling device;

[0024] Figure 3 This is a three-dimensional cross-sectional view of a steel coil cooling device.

[0025] The annotations in the attached figures are explained as follows:

[0026] 10. Conveying mechanism; 11. Track foundation; 12. Conveying track; 13. Guide rail; 131. Receiving trough; 132. Connecting channel; 14. Track car; 141. Support platform; 142. Base plate; 143. Tension spring; 20. Spraying system; 21. Water supply pump; 22. Water supply pipe; 221. Water supply hole; 23. Lifting plug; 231. Crossbeam; 232. Connecting rod; 233. Sealing plug; 24. Spray pipe; 25. Spring; 30. Water storage unit; 31. Impurity tank; 32. Clear water tank; 33. Return trough; 34. Filtration structure. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0028] Please see Figures 1-3 A steel coil cooling device includes a conveying mechanism 10, a spraying system 20, and a water storage unit 30. The conveying mechanism 10 is laid on the ground and includes a conveying track 12 and a railcar 14. The railcar 14 moves the steel coil from one end of the conveying track 12 to the other end. The spraying system 20 is erected on both sides of the conveying track 12 to spray and cool the steel coil placed on the railcar 14. The water storage unit 30 includes a return trough 33 opened on the ground surface. The return trough 33 is set on the outer periphery of the conveying mechanism 10 and is used to recover the cold water sprayed by the spraying system 20 to achieve recycling.

[0029] The conveying mechanism 10 also includes a track base 11 and a guide rail 13. In this embodiment, the track base 11 is a hardened horizontal ground. Two conveying tracks 12 are installed parallel to each other on the track base 11. The guide rail 13 is parallel to the conveying tracks 12 and is set in the middle of the two conveying tracks 12. The track car 14 straddles the conveying tracks 12 and moves along the direction of the extension of the conveying tracks 12.

[0030] The top surface of the guide rail 13 is provided with several accommodating grooves 131 at equal intervals along its extension direction, and the bottom surface of the accommodating grooves 131 is provided with a downwardly extending connecting channel 132.

[0031] like Figure 2 As shown, the railcar 14 includes a support platform 141, a base plate 142, and a tension spring 143. The top surface of the support platform 141 forms an arc-shaped groove to accommodate the steel coil. A lifting through-hole is provided at the center of the arc-shaped groove of the support platform 141. The base plate 142 is vertically mounted on the bottom surface of the support platform 141. The base plate 142 includes a plate body and a protrusion integrally formed on the plate body. The protrusion extends into the lifting through-hole of the support platform 141. The tension spring 143 connects the bottom surface of the support platform 141 and the base plate 142, providing tension to make the base plate 142 abut against the bottom surface of the support platform 141, maintaining the protrusion at a preset height relative to the lifting through-hole. When the steel coil is placed in the arc-shaped groove of the railcar 14, the steel coil presses against the protrusion, causing the plate body of the base plate 142 to descend and adhere to the guide rail 13.

[0032] The two sides of the base plate 142 are shorter than the two sides of the support platform 141. When the railcar 14 is installed on the conveying rail 12, the two ends of the support platform 141 are mounted on the two conveying rails 12, and the base plate 142 is accommodated in the space between the two conveying rails 12.

[0033] Furthermore, the front end of the base plate 142 along the sliding direction is formed with a wedge-shaped angle so that the plate can press against other objects when sliding.

[0034] Preferably, the top surface of the protruding post is a concave arc surface that matches the arc-shaped groove, so as to match the arc surface of the steel coil.

[0035] Furthermore, such as Figure 1 As shown, in order to enable the guide rail 13 to simultaneously guide the railcar 14, a clamping groove is opened on the bottom surface of the support platform 141 along the sliding direction. The two ends of the support platform 141 overlap on the two conveying rails 12. At the same time, its clamping groove clamps on the guide rail 13, so as to stably guide the sliding of the support platform 141. Furthermore, the base plate 142 and the tension spring 143 are installed in the clamping groove. The lifting through hole of the support platform 141 is connected to the clamping groove. The protrusion of the base plate 142 passes upward through the lifting through hole and exits into the arc-shaped groove on the top surface of the support platform 141.

[0036] The sprinkler system 20 includes a water supply pump 21, a water supply pipe 22, a lifting plug 23, and a sprinkler pipe 24. The water supply pump 21 is located at one end of the conveying mechanism 10. The outlet of the water supply pump 21 is connected to the water supply pipe 22. The water supply pipe 22 is located inside the guide rail 13 and extends along the guide rail 13, and is connected to the vertically arranged connecting channel 132. Several water supply holes 221 are opened on both sides of the water supply pipe 22. The water supply holes 221 penetrate the side wall of the guide rail 13. The lifting plug 23 is installed in the receiving groove 131 of the guide rail 13 and can be lifted and lowered. The lifting plug 23 extends into the water supply pipe 22 and abuts against the two side walls inside the pipe, blocking or opening the opposite water supply holes 221 on the two side walls. The spray pipe 24 is roughly C-shaped and is positioned opposite each other on both sides of the conveying track 12. It is connected to the water supply holes 221 on both sides of the guide rail 13. The spray nozzle at the top of the spray pipe 24 is connected to a spray head, which can evenly spray cold water onto the steel coil for cooling. Understandably, the water supply pipe 22 can also be located below the guide rail 13, such as within the track foundation 11; in this case, the lifting plug 23 simply needs to pass through the guide rail 13 and extend into the water supply pipe 22.

[0037] like Figure 3As shown, the lifting plug 23 is T-shaped and includes an upper crossbeam 231, a connecting rod 232 vertically connected to the lower surface of the crossbeam 231, and a sealing head 233 connected to the lower end of the connecting rod 232. The crossbeam 231 is vertically mounted in the receiving groove 131 of the guide rail 13, and both ends of the crossbeam 231 are arc-shaped to accommodate the wedge angle of the base plate 142. When the railcar 14 moves past, the base plate 142 contacts the guide rail 13, and the base plate 142 presses against the lifting plug 23, forcing the lifting plug 23 to slide downward. The connecting rod 232 is fitted into the connecting channel 132 of the guide rail 13, and the two ends of the sealing head 233 correspond to the corresponding water supply holes 221 in the water supply pipe 22.

[0038] Furthermore, a spring 25 is provided between the lower end face of the crossbeam 231 and the bottom surface of the receiving groove 131 of the guide rail 13. The spring 25 supports the lifting plug 23 protruding from the surface of the guide rail 13 and provides the force for the lifting plug 23 to return to its original position.

[0039] The water storage unit 30 is used to provide cold water to the spray system 20 and to recycle the water after spraying by the spray system 20. It includes an impurity tank 31, a clear water tank 32, a return trough 33, and a filter structure 34. The impurity tank 31 and the clear water tank 32 are arranged side-by-side at one end of the conveying mechanism 10, with the impurity tank 31 located on the outer side and the clear water tank 32 located on the inner side near the conveying mechanism 10. A water supply pump 21 is installed in the clear water tank 32 to transport the cold water in the clear water tank 32 to the water supply pipe 22. The return trough 33 is located within the conveying mechanism 10. On both sides, it connects to the clear water tank 32, facilitating the recovery of cold water sprayed by the sprinkler system 20. The filter structure 34 includes upper and lower filter channels. The upper filter channel is located at the top of the return trough 33 and connects to the impurity tank 31, ensuring a flat ground for easy personnel passage and facilitating the collection of filtered leaves and other debris into the impurity tank 31 for cleaning. The lower filter channel is located inside the return trough 33, and the bottom of the return trough 33 connects to the clear water tank 32, used to filter the cold water after spraying before it flows into the clear water tank 32, thus achieving recycling. Understandably, if the water has a certain temperature, new cold water can be added to the clear water tank 32.

[0040] When using the aforementioned cooling device, the steel coil is placed on one end of the conveying track 12 on the railcar 14. The railcar 14 moves along the conveying track 12 towards the other end, pressing the steel coil against the arc-shaped groove of the support platform 141. This pressure, along with the protrusion of the base plate 142, pushes the base plate 142 downwards, lowering it by a preset height until it roughly corresponds to the top surface of the guide rail 13. As the railcar 14 moves, when it reaches the lifting plug 23 of the guide rail 13, the base plate 142 will... When the lifting plug 23 protrudes from the guide rail 13 and is pressed downward, the lifting plug 23 releases the blockage of the water supply hole 221, thereby opening the water inlet at the lower end of the spray pipe 24. The cold water in the water supply pipe 22 enters the spray pipe 24 and is then sprayed out through the top nozzle to cool the steel coil of the railcar 14. The sprayed cold water flows back through the ground and is filtered before flowing back into the return trough 33. The filter structure then flows into the clear water pool 32, while the filtered impurities flow into the impurity pool 31 along the upper filter channel.

[0041] As the railcar 14 moves, each time the railcar 14 passes the lifting plug 23 on the guide rail 13, it will press against the lifting plug 23, so that the corresponding spray pipe 24 will spray. After the steel coil passes through the pairs of spray pipes 24 on both sides of the conveying mechanism 10, it will be cooled down and then moved out from the other end of the conveying rail 12.

[0042] After the railcar 14 passes the lifting plug 23 of the guide rail 13, the lifting plug 23 will pop up and re-seal the water supply hole 221, preventing the spray pipe 24 from being continuously open and causing waste. The used cold water will flow through the ground into the return tank 33, and after being filtered by the filter structure 34, it will be stored in the clear water tank 32, allowing the cold water to be reused. The filtered impurities will enter the impurity tank for centralized treatment. In this way, the cooling device can open the corresponding spray pipe 24 when the steel coil passes by to cool the steel coil, and can also recycle the used cold water, which helps to save resources.

[0043] It should be further explained that the conveying mechanism 10 has multiple railcars 14 (not shown) arranged linearly on the conveying track 12, each used to mount the steel coil to be cooled. The multiple railcars 14 move sequentially from one end of the conveying track 12 to the other. Understandably, after the steel coil is removed (e.g., grabbed by a crane hook), the railcar 14 that has slid to the end needs to return to its original initial position on the conveying track. The steel coil cooling device further includes transverse tracks (not shown) located at both ends of the conveying track, and a return track (not shown) parallel to the conveying track and connected to the transverse tracks at both ends. This forms a circulating railcar 14 conveying system. Furthermore, the conveying track, transverse tracks, and return tracks are all equipped with corresponding thrust devices to propel the railcars 14.

[0044] Understandably, when no steel coil is installed on the railcar 14, the protrusion of the base plate 142 will not be pressed against it, that is, when the railcar 14 moves past the lifting plug 23, the spray pipe 24 at the corresponding lifting plug 23 will not be opened.

[0045] Understandably, if multiple steel coils are not sprayed in sequence, the steel coils can be hoisted onto a railcar 14 located at a certain lifting plug 23. The railcar 14 can stop on the conveying rail 12, and the base plate 142 pushes the lifting plug 23 down to open the water supply hole 221, so that the steel coil is continuously sprayed. After the steel coil is cooled down, it can be hoisted away. After the steel coil is removed from the railcar 14, the base plate 142 and the lifting plug 23 return to their original positions under the elastic force of the spring 25, the water supply hole 221 is resealed, and the spray pipe 24 stops spraying cooling water.

[0046] In summary, this invention provides a steel coil cooling device. A liftable base plate is mounted on a railcar. When pressed by a steel coil, the base plate lowers. As the railcar carries the steel coil, the base plate presses against a lifting plug protruding on the guide rail, connecting the water supply pipe to the spray pipe. Cold water is sprayed to cool the steel coil on the railcar. After the railcar passes, the lifting plug automatically returns to its original position, disconnecting the water supply pipe from the spray pipe, allowing for timely shutdown of the spray and saving water resources. Furthermore, multiple railcars can be installed on the conveyor rail and move sequentially from one end to the other for spraying, greatly improving cooling efficiency. Continuous spraying and cooling of multiple steel coils is achieved, significantly improving production efficiency and avoiding resource waste.

[0047] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A steel coil cooling device, comprising a conveying mechanism (10) and a spraying system (20), wherein the conveying mechanism (10) is laid on the ground and the spraying system (20) is erected on both sides of the conveying mechanism (10), characterized in that: The conveying mechanism (10) includes two parallel conveying tracks (12), a guide rail (13) located in the middle of the conveying tracks (12), and several railcars (14) installed on the conveying tracks (12); The top surface of the guide rail (13) is provided with a plurality of receiving grooves (131) spaced apart, and the bottom surface of the receiving grooves (131) is provided with a downwardly extending connecting channel (132); The railcar (14) includes a support platform (141), a base plate (142), and a tension spring (143). The support platform (141) has a lifting through hole. The base plate (142) includes a plate body and a protruding post integrally formed on the plate body. The protruding post protrudes into the lifting through hole of the support platform (141). The tension spring (143) is connected between the bottom surface of the support platform (141) and the base plate (142). The spray system (20) includes a water supply pipe (22), a lifting plug (23), and a spray pipe (24). The water supply pipe (22) is installed in the guide rail (13) and extends along the guide rail (13), and is connected to several connecting channels (132). Several water supply holes (221) are opened on both sides of the water supply pipe (22). The lifting plug (23) is installed in the mounting and receiving groove (131) and can be lifted and lowered. The lifting plug (23) extends into the water supply pipe (22) and seals the corresponding water supply hole (221). The spray pipe (24) is installed on both sides of the conveying track (12) and is connected to the water supply holes (221) on both sides of the water supply pipe (22). A spring (25) is provided between the lifting plug (23) and the bottom surface of the receiving groove (131) of the guide rail (13), and the spring (25) supports the lifting plug (23) to protrude from the surface of the guide rail (13).

2. The steel coil cooling device according to claim 1, characterized in that: The lifting plug (23) includes a crossbeam (231) at the upper end, a connecting rod (232) vertically connected to the crossbeam (231), and a sealing head (233) connected to the lower end of the connecting rod (232). The crossbeam (231) is set in the receiving groove (131), the connecting rod (232) is sleeved in the connecting channel (132) of the guide rail (13), and the two ends of the sealing head (233) correspond to the corresponding water supply holes (221) in the water supply pipe (22).

3. The steel coil cooling device according to claim 2, characterized in that: One end of the base plate (142) has a wedge-shaped angle, and both ends of the crossbeam (231) are arc-shaped so that when the plate slides over the lifting plug (23), the wedge-shaped angle of the plate presses against the arc surface of the crossbeam (231).

4. The steel coil cooling device according to claim 1, characterized in that: It also includes an impurity pool (31), a clear water pool (32), a return channel (33), and a filter structure (34). A water supply pump (21) is installed in the clear water pool (32) to transport the cold water in the clear water pool (32) to the water supply pipe (22). The return channel (33) is set on both sides of the conveying mechanism (10). The filter structure (34) includes upper and lower filter channels. The upper filter channel is set at the top of the return channel (33) and connected to the impurity pool (31). The lower filter channel is set in the return channel (33) and connected to the clear water pool (32).

5. The steel coil cooling device according to claim 1, characterized in that: The conveying mechanism (10) has multiple railcars (14) arranged on the conveying track (12) for installing steel coils to be cooled. The multiple railcars (14) move sequentially from one end of the conveying track (12) to the other end.

6. The steel coil cooling device according to claim 5, characterized in that: The conveying mechanism (10) includes a transverse track at both ends of the conveying track (12) and a return track parallel to the conveying track (12) and connected to the transverse track at both ends, thereby forming a circular railcar (14) conveying system. The conveying track (12), the transverse track and the return track are all equipped with corresponding thrust devices to push the railcar (14) to move.

7. The steel coil cooling device according to claim 1, characterized in that: The bottom surface of the support platform (141) is provided with a clamping groove along the sliding direction. The two ends of the support platform (141) overlap on the two conveying rails (12). The clamping groove is clamped on the guide rail (13). The base plate (142) and the tension spring (143) are installed in the clamping groove. The lifting through hole of the support platform (141) is connected to the clamping groove. The protrusion of the base plate (142) extends upward through the lifting through hole and out of the support platform (141).

8. The steel coil cooling device according to claim 7, characterized in that: The top surface of the support platform (141) forms an arc-shaped groove, and the lifting through hole is provided at the center of the arc-shaped groove. The top surface of the protruding column is a concave arc surface that matches the arc-shaped groove.

9. A cooling method using the steel coil cooling apparatus according to any one of claims 1-8, characterized in that, The cooling method is as follows: The steel coil is placed on the railcar (14), and the railcar (14) moves along the conveying rail (12) to the other end. The steel coil presses against the bearing platform (141), and the protrusions pressing against the bottom plate (142) will push the bottom plate (142) to move downward, and the plate will drop to a preset height. When the railcar (14) moves to the lifting plug (23) of the guide rail (13), the plate of the base plate (142) will contact the raised lifting plug (23) on the guide rail (13) and press the lifting plug (23) downward. The lifting plug (23) opens the water supply hole (221), thereby opening the water inlet at the lower end of the spray pipe (24). The cold water in the water supply pipe (22) enters the spray pipe (24) to cool the passing steel coil. As the railcar (14) moves, when the railcar (14) reaches the lifting plug (23) at a point on the guide rail (13), it will press against the lifting plug (23) and drive the corresponding spray pipe (24) to spray. After the steel coil is sprayed by the pairs of spray pipes (24) on both sides of the conveying mechanism (10), it will be cooled down and moved out from the other end of the conveying mechanism (10).

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