Local cooling device for strip steel

Abstract

The invention relates to the technical field of cooling devices, and discloses a local cooling device for strip steel, which solves the problem of non-uniform cooling of the existing cooling device, and comprises a cooling box, a fan arranged at the top end of the cooling box, a heat exchanger arranged on an air return pipe, and a first five-way valve and a second five-way valve arranged at one end of an air supply pipe, a first cooling fan cover is arranged at the top end in the cooling box, a second cooling fan cover is arranged at the bottom end in the cooling box, and the first cooling fan cover and the second cooling fan cover are each composed of an outer cover body, a plurality of L-shaped splitter plates, a flow equalizing net and an auxiliary flow guide assembly. The first five-division valve and the second five-division valve are each composed of a vertical limiting sleeve, a first combination valve, a second combination valve and a third combination valve. The first combination valve, the second combination valve and the third combination valve are each composed of a valve seat, a handle, a first connecting rod, a second connecting rod, a spline shaft, a V-shaped limiting body and a plugging body. Through the cooling device, the cooling uniformity of the strip steel can be improved, and the strip steel is prevented from being deformed.

Description

Technical Field

[0001] The present invention belongs to the technical field of cooling devices, and specifically relates to a local cooling device for strip steel. Background Art

[0002] During the production and processing of strip steel, cooling treatment is required. During the operation of the existing cooling device, the strip steel passes through the inside of the cooling device, and then cold air is sent horizontally through the cooling device to cool the strip steel through the cold air. This cooling method has the disadvantage of uneven cooling. During the cooling process, the cooling air will first contact the edges of the strip steel, which will cause the edges of the strip steel to cool too quickly, while the middle part of the strip steel cools more slowly, and thus it is easy for the edges of the strip steel to deform, and the cooling effect is not good. Therefore, the present application proposes a local cooling device for strip steel. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a local cooling device for strip steel, effectively solving the problem of uneven cooling of the existing cooling device.

[0004] To achieve the above object, the present invention provides the following technical solution: A local cooling device for strip steel, including a cooling box. A blower is fixedly arranged at the top of the cooling box. The blower is connected to the cooling box through an air supply pipe and a return air pipe. A heat exchanger is arranged on the return air pipe. One end of the air supply pipe away from the blower is provided with a five-way valve one and a five-way valve two. At the top end inside the cooling box, there is a first cooling air hood connected to the five-way valve one. At the bottom end inside the cooling box, there is a second cooling air hood connected to the five-way valve two. A cooling cavity is formed between the first cooling air hood and the second cooling air hood. An exhaust cavity is formed between the outer side walls of the first cooling air hood and the second cooling air hood and the cooling box.

[0005] Both the first cooling air hood and the second cooling air hood are composed of an outer housing, a number of L-shaped flow dividing plates, a flow equalizing net and an auxiliary flow guiding assembly. One end of the outer housing is provided with air inlets matching the five-way valve one and the five-way valve two. On the side of the outer housing close to the cooling cavity, there are cooling air outlets. The L-shaped flow dividing plates are fixedly connected inside the outer housing and extend outside the air inlets. The L-shaped flow dividing plates divide the outer housing to form five air supply inner cavities. Both the flow equalizing net and the auxiliary flow guiding assembly are connected to the bottom end inside the outer housing, and the flow equalizing net is located on top of the auxiliary flow guiding assembly.

[0006] Both the five-way valve one and the five-way valve two are composed of a vertical limiting sleeve, a first combined valve, a second combined valve and a third combined valve. The vertical limiting sleeve is fixedly connected between the air supply pipe and the first cooling air hood and the second cooling air hood. The first combined valve, the second combined valve and the third combined valve are connected between the vertical limiting sleeve and the air supply pipe.

[0007] The first combined valve, the second combined valve, and the third combined valve are all composed of a valve seat, a handle, a first connecting rod, a second connecting rod, a flower shaft, a V-shaped limiting body, and a plugging body. The valve seat is fixedly connected to one side of the air supply pipe. One end of the handle is hinged to the valve seat. One end of the first connecting rod is hinged to the handle. One end of the second connecting rod is hinged to the first connecting rod. The V-shaped limiting body is located inside the plugging body and is fixedly connected to the end of the second connecting rod away from the first connecting rod through the flower shaft. The flower shaft is rotatably connected inside the plugging body. An inner cavity matching the flower shaft and the V-shaped limiting body is provided inside the plugging body.

[0008] Preferably, strip steel inlets and outlets are provided at the middle positions of the front and back of the cooling box, and auxiliary support rollers are rotatably provided at the bottom ends inside the strip steel inlets and outlets.

[0009] Preferably, the first cooling air hood is fixedly connected to the inner side wall of the cooling box through a plurality of lifting lugs, and the second cooling air hood is fixedly connected to the inner side wall of the cooling box through a plurality of supports.

[0010] Preferably, the cross-sectional areas of the five air supply inner cavities are the same.

[0011] Preferably, vertical through grooves matching the flower shaft are provided at the middle positions of the front and back of the plugging body, and the width of the vertical through grooves is greater than the diameter of the flower shaft.

[0012] Preferably, a first runner and a second runner are rotatably provided at the end of the V-shaped limiting body away from the flower shaft.

[0013] Preferably, a plurality of positioning holes are provided on the valve seat, and spring limit buckles matching the positioning holes are provided on the handle.

[0014] Preferably, the heat exchanger is composed of a heat exchange housing, heat exchange coils, a water inlet connection port, and a water drainage connection port. The heat exchange coils are fixedly connected inside the heat exchange housing, and the water inlet connection port and the water drainage connection port are respectively fixedly connected to both ends of the heat exchange coils.

[0015] Preferably, the auxiliary flow guiding assembly is composed of a first flow guiding unit and a second flow guiding unit, and the first flow guiding unit and the second flow guiding unit are respectively connected to both sides of the bottom end inside the outer cover body.

[0016] Preferably, both the first flow guiding unit and the second flow guiding unit are composed of an electric telescopic rod, an L-shaped driving arm, a plurality of pull rods, a plurality of strip-shaped air guiding plates, and a plurality of rotating shafts. The electric telescopic rod is fixedly connected to the bottom end of the side of the outer cover body. The strip-shaped air guiding plates are rotatably connected to the bottom end inside the outer cover body through the rotating shafts. One end of the pull rod is fixedly connected to the rotating shaft, and the other end of the pull rod is hinged to the L-shaped driving arm. A vertical limiting groove is provided at the end of the L-shaped driving arm close to the electric telescopic rod, and a movable wheel located inside the vertical limiting groove is rotatably provided at one end of the side of the electric telescopic rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) During operation, by providing a first cooling air hood and a second cooling air hood composed of an outer housing, a plurality of L-shaped flow splitting plates, a flow equalizing net, and an auxiliary flow guiding assembly, and by providing a five-way valve one and a five-way valve two composed of a vertical limiting sleeve, a first combined valve, a second combined valve, and a third combined valve, the cooling air can be split, the strip steel can be uniformly cooled, the cooling efficiency can be improved, deformation of the strip steel caused by excessive cooling at the edge positions can be avoided, and the control of the cooling air volume can be achieved;

[0019] (2) By providing a heat exchanger composed of a heat exchange housing, a heat exchange coil, a water inlet connection port, and a water drainage connection port, and by providing a cooling box, a fan, a supply air duct, and a return air duct, the internal circulation of the cooling air can be achieved, the heat exchange operation can be realized, thereby cooling the cooling air and controlling the cooling rate of the cooling air;

[0020] (3) By providing a first flow guiding unit and a second flow guiding unit composed of an electric telescopic rod, an L-shaped driving arm, a plurality of pull rods, a plurality of strip-shaped air guiding plates, and a plurality of rotating shafts, the cooled air can be assisted in guiding, which is more convenient for discharging the cooled air and improving the air exhaust smoothness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0022] In the drawings:

[0023] Figure 1 is a schematic structural diagram of the local cooling device for strip steel of the present invention;

[0024] Figure 2 is a schematic internal structural diagram of the local cooling device for strip steel of the present invention;

[0025] Figure 3 is a cross-sectional view of the local cooling device for strip steel of the present invention;

[0026] Figure 4 is a schematic connection structure diagram of the five-way valve one and the first cooling air hood of the present invention;

[0027] Figure 5 is a cross-sectional view of the connection between the five-way valve one and the first cooling air hood of the present invention;

[0028] Figure 6 is a schematic partial connection structure diagram of the five-way valve one and the first cooling air hood of the present invention;

[0029] Figure 7One of the schematic structural diagrams of the first combined valve of the present invention;

[0030] Figure 8 Another schematic structural diagram of the first combined valve of the present invention;

[0031] Figure 9 Schematic structural diagram of the heat exchanger of the present invention;

[0032] Figure 10 Schematic structural diagram of the auxiliary flow guiding assembly of the present invention;

[0033] Figure 11 Schematic structural diagram of the first flow guiding unit of the present invention;

[0034] In the figure: 1. Cooling box; 2. Fan; 3. Air supply duct; 4. Return air duct; 5. Heat exchanger; 6. Five-way valve one; 7. Five-way valve two; 8. First cooling air hood; 9. Second cooling air hood; 10. Cooling cavity; 11. Exhaust air cavity; 12. Outer housing; 13. L-shaped flow dividing plate; 14. Flow equalizing net; 15. Auxiliary flow guiding assembly; 16. Air inlet; 17. Cooling air exhaust port; 18. Air supply inner cavity; 19. Vertical limiting sleeve; 20. First combined valve; 21. Second combined valve; 22. Third combined valve; 23. Valve seat; 24. Handle; 25. Link one; 26. Link two; 27. Flower shaft; 28. V-shaped limiting body; 29. Sealing body; 30. Inner cavity; 31. Strip steel inlet and outlet; 32. Auxiliary support roller; 33. Lifting lug; 34. Support; 35. Vertical through groove; 36. Rotating wheel one; 37. Rotating wheel two; 38. Positioning hole; 39. Spring limiting buckle; 40. Heat exchange housing; 41. Heat exchange coil; 42. Water inlet connection port; 43. Water drainage connection port; 44. First flow guiding unit; 45. Second flow guiding unit; 46. Electric telescopic rod; 47. L-shaped driving arm; 48. Pull rod; 49. Strip-shaped air guiding plate; 50. Rotating shaft; 51. Vertical limiting groove; 52. Movable wheel. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1, consisting of Figures 1 to 11Provided is a local cooling device for strip steel according to the present invention, which includes a cooling box 1. A blower 2 is fixedly arranged at the top of the cooling box 1. The blower 2 is connected to the cooling box 1 through a supply air duct 3 and a return air duct 4. A heat exchanger 5 is arranged on the return air duct 4. One end of the supply air duct 3 away from the blower 2 is provided with a five-way valve one 6 and a five-way valve two 7. At the top inside the cooling box 1, there is a first cooling air hood 8 connected to the five-way valve one 6. At the bottom inside the cooling box 1, there is a second cooling air hood 9 connected to the five-way valve two 7. A cooling cavity 10 is formed between the first cooling air hood 8 and the second cooling air hood 9. An exhaust air cavity 11 is formed between the outer side walls of the first cooling air hood 8 and the second cooling air hood 9 and the cooling box 1;

[0037] When the blower 2 starts, air supply is realized. The supply air duct 3, the return air duct 4 and the cooling box 1 cooperate to form a circulating air duct. The heat exchanger 5 realizes continuous heat exchange of the cooling air to reduce the temperature of the cooling air. By controlling the heat exchange efficiency, the temperature of the cooling air can be effectively controlled to avoid deformation of the strip steel caused by too low temperature. The five-way valve one 6 and the five-way valve two 7 can divide the cooling air. The first cooling air hood 8 and the second cooling air hood 9 cooperate with the five-way valve one 6 and the five-way valve two 7 to realize uniform air supply, and then realize uniform cooling of the strip steel to avoid deformation of the strip steel due to too fast cooling of the strip steel edges;

[0038] Both the first cooling air hood 8 and the second cooling air hood 9 are composed of an outer housing 12, a plurality of L-shaped flow dividing plates 13, a flow equalizing net 14 and an auxiliary flow guiding component 15. One end of the outer housing 12 is provided with an air inlet 16 matching the five-way valve one 6 and the five-way valve two 7. On the side of the outer housing 12 close to the cooling cavity 10, there is a cooling air exhaust opening 17. The L-shaped flow dividing plates 13 are fixedly connected inside the outer housing 12 and extend outside the air inlet 16. The L-shaped flow dividing plates 13 divide the outer housing 12 to form five air supply inner cavities 18 (such as Figure 5 A, B, C, D, E in the figure), the flow equalizing net 14 and the auxiliary flow guiding component 15 are both connected to the bottom inside the outer housing 12, and the flow equalizing net 14 is located on the top of the auxiliary flow guiding component 15;

[0039] The L-shaped flow dividing plates 13 divide the inside of the outer housing 12 into five uniform air supply inner cavities 18. Uniform air supply is realized through the five air supply inner cavities 18. The flow equalizing net 14 can further improve the uniformity of air supply. The auxiliary flow guiding component 15 can realize auxiliary exhaust air and improve the smoothness of exhaust air;

[0040] Both the five-way valve one 6 and the five-way valve two 7 are composed of a vertical limiting sleeve 19, a first combined valve 20, a second combined valve 21 and a third combined valve 22. The vertical limiting sleeve 19 is fixedly connected between the supply air duct 3 and the first cooling air hood 8 and the second cooling air hood 9. The first combined valve 20, the second combined valve 21 and the third combined valve 22 are connected between the vertical limiting sleeve 19 and the supply air duct 3;

[0041] The vertical limit sleeve 19 can achieve vertical limitation of the first combined valve 20, the second combined valve 21 and the third combined valve 22, and the first combined valve 20, the second combined valve 21 and the third combined valve 22 can adjust the air volume of the five air supply inner cavities 18;

[0042] The first combined valve 20, the second combined valve 21 and the third combined valve 22 are all composed of a valve seat 23, a handle 24, a first connecting rod 25, a second connecting rod 26, a flower shaft 27, a V-shaped limiting body 28 and a plugging body 29. The valve seat 23 is fixedly connected to one side of the air supply pipe 3. One end of the handle 24 is hinged to the valve seat 23. One end of the first connecting rod 25 is hinged to the handle 24. One end of the second connecting rod 26 is hinged to the first connecting rod 25. The V-shaped limiting body 28 is located inside the plugging body 29 and is fixedly connected to the end of the second connecting rod 26 far from the first connecting rod 25 through the flower shaft 27. The flower shaft 27 is rotatably connected to the inside of the plugging body 29. An inner cavity 30 matching the flower shaft 27 and the V-shaped limiting body 28 is provided inside the plugging body 29;

[0043] The first combined valve 20, the second combined valve 21 and the third combined valve 22 can respectively completely block the A, C, and D channels. When the A, C, and D channels are completely blocked, air supply is only carried out through the B and D channels. The cooling air sent out by the B and D channels blows towards the positions near both sides of the middle of the strip steel. In addition, after the first combined valve 20 is adjusted, it can achieve split air supply to the A and B channels. After the second combined valve 21 is adjusted, it can achieve air supply to the C and D channels. After the third combined valve 22 is adjusted, it can achieve air supply to the E channel. According to the height of the downward adjustment of the plugging body 29, the air volume supplied to each channel can be changed. During adjustment, rotate the handle 24. The handle 24 drives the first connecting rod 25 to move. The first connecting rod 25 drives the second connecting rod 26 to swing. The second connecting rod 26 drives the flower shaft 27 to rotate synchronously. The flower shaft 27 drives the V-shaped limiting body 28 to swing. The plugging body 29 can be driven by the V-shaped limiting body 28 to move up or down for adjustment;

[0044] Strip steel inlets and outlets 31 are provided at the middle positions of the front and back of the cooling box 1. An auxiliary support roller 32 is rotatably provided at the bottom inside the strip steel inlets and outlets 31, which can assist in supporting the strip steel;

[0045] The first cooling air hood 8 is fixedly connected to the inner side wall of the cooling box 1 through a plurality of lifting lugs 33. The second cooling air hood 9 is fixedly connected to the inner side wall of the cooling box 1 through a plurality of supports 34, which can respectively support the first cooling air hood 8 and the second cooling air hood 9;

[0046] The cross-sectional areas of the five air supply inner cavities 18 are the same, which can achieve uniform and equal air supply;

[0047] Vertical through slots 35 matching the flower shaft 27 are provided at the middle positions on the front and back of the plug body 29. The width of the vertical through slots 35 is greater than the diameter of the flower shaft 27, enabling relative movement between the flower shaft 27 and the plug body 29 and preventing the plug body 29 from being limited and stuck;

[0048] Rotating wheels one 36 and two 37 are rotatably provided at one end of the V-shaped limiting body 28 away from the flower shaft 27, which can reduce the friction between the V-shaped limiting body 28 and the plug body 29;

[0049] A number of positioning holes 38 are provided on the valve seat 23, and spring limit buckles 39 matching the positioning holes 38 are provided on the handle 24, which can limit the handle 24 and prevent the handle 24 from rotating by itself;

[0050] The heat exchanger 5 is composed of a heat exchange housing 40, a heat exchange coil 41, a water inlet connection 42 and a water drainage connection 43. The heat exchange coil 41 is fixedly connected inside the heat exchange housing 40, and the water inlet connection 42 and the water drainage connection 43 are respectively fixedly connected to both ends of the heat exchange coil 41;

[0051] The water inlet connection 42 and the water drainage connection 43 can be externally connected to water pipes, and heat exchange with the circulating air is achieved through the water inside the heat exchange coil 41, thereby cooling the circulating air;

[0052] The auxiliary flow guiding assembly 15 is composed of a first flow guiding unit 44 and a second flow guiding unit 45. The first flow guiding unit 44 and the second flow guiding unit 45 are respectively connected to both sides of the inner bottom end of the outer cover body 12. Through the first flow guiding unit 44 and the second flow guiding unit 45, the cooled air can be guided to both sides, thereby assisting in exhaust and improving the exhaust smoothness;

[0053] Both the first flow guiding unit 44 and the second flow guiding unit 45 are composed of an electric telescopic rod 46, an L-shaped driving arm 47, a number of pull rods 48, a number of strip-shaped air guiding plates 49 and a number of rotating shafts 50. The electric telescopic rod 46 is fixedly connected to the bottom end of the side of the outer cover body 12. The strip-shaped air guiding plates 49 are rotatably connected to the inner bottom end of the outer cover body 12 through the rotating shafts 50. One end of the pull rod 48 is fixedly connected to the rotating shaft 50, and the other end of the pull rod 48 is hinged to the L-shaped driving arm 47. A vertical limiting groove 51 is provided at one end of the L-shaped driving arm 47 close to the electric telescopic rod 46, and a movable wheel 52 located inside the vertical limiting groove 51 is rotatably provided at one side end of the electric telescopic rod 46;

[0054] The angle of the strip air deflector 49 can be adjusted. When adjusting, the electric telescopic rod 46 drives the L-shaped driving arm 47 to move. The L-shaped driving arm 47 drives the pull rod 48 to swing, and the pull rod 48 drives the strip air deflector 49 to swing. The strip air deflector 49 can be supported by the rotating shaft 50. The vertical limiting groove 51 and the movable wheel 52 can improve the mobility of the connection between the electric telescopic rod 46 and the L-shaped driving arm 47 and avoid restrictions.

[0055] During operation, by providing the first cooling air hood and the second cooling air hood composed of an outer housing, a number of L-shaped flow splitting plates, a flow equalizing mesh and an auxiliary flow guiding assembly, and by providing the five-way valve one and the five-way valve two composed of a vertical limiting sleeve, a first combined valve, a second combined valve and a third combined valve, the cooling air can be split, the strip steel can be evenly cooled, the cooling efficiency can be improved, deformation of the strip steel caused by over-fast cooling at the edge position can be avoided, and the control of the cooling air volume can be achieved; by providing a heat exchanger composed of a heat exchange housing, a heat exchange coil, a water inlet connection and a water drainage connection, and by providing a cooling box, a fan, an air supply pipe and a return air pipe, the internal circulation of the cooling air can be achieved, heat exchange operation can be realized, thereby cooling the cooling air and controlling the cooling rate of the cooling air; by providing a first flow guiding unit and a second flow guiding unit composed of an electric telescopic rod, an L-shaped driving arm, a number of pull rods, a number of strip air deflectors and a number of rotating shafts, the cooled air can be assisted in guiding, which is more convenient for discharging the cooled air and improving the exhaust smoothness.

Claims

1. A local cooling device for a steel strip, comprising a cooling box (1), characterized in that: A fan (2) is fixedly arranged at the top of the cooling box (1), and the fan (2) is connected to the cooling box (1) through an air supply pipe (3) and an air return pipe (4), and a heat exchanger (5) is arranged on the air return pipe (4); a five-way valve (6) and a five-way valve (7) are arranged at one end of the air supply pipe (3) away from the fan (2); a first cooling air hood (8) connected to the five-way valve (6) is arranged at the top of the cooling box (1), and a second cooling air hood (9) connected to the five-way valve (7) is arranged at the bottom of the cooling box (1); a cooling cavity (10) is formed between the first cooling air hood (8) and the second cooling air hood (9), and an exhaust cavity (11) is formed between the outer side walls of the first cooling air hood (8) and the second cooling air hood (9) and the cooling box (1); The first cooling air hood (8) and the second cooling air hood (9) are both composed of an outer cover body (12), a plurality of L-shaped flow dividers (13), a flow equalizing net (14) and an auxiliary flow guide assembly (15); an air inlet (16) matching the five-way valve one (6) and the five-way valve two (7) is provided at one end of the outer cover body (12); a cooling air outlet (17) is provided on one side of the outer cover body (12) close to the cooling chamber (10); the L-shaped flow divider (13) is fixedly connected to the inside of the outer cover body (12) and extends to the outside of the air inlet (16); the L-shaped flow divider (13) divides the outer cover body (12) into five air supply cavities (18); the flow equalizing net (14) and the auxiliary flow guide assembly (15) are both connected to the bottom end of the inner part of the outer cover body (12); and the flow equalizing net (14) is located at the top of the auxiliary flow guide assembly (15); The five-way valve 1 (6) and the five-way valve 2 (7) are both composed of a vertical limit sleeve (19), a first combination valve (20), a second combination valve (21) and a third combination valve (22); the vertical limit sleeve (19) is fixedly connected between the air supply pipe (3) and the first cooling air hood (8) and the second cooling air hood (9); the first combination valve (20), the second combination valve (21) and the third combination valve (22) are connected between the vertical limit sleeve (19) and the air supply pipe (3); The first combination valve (20), the second combination valve (21) and the third combination valve (22) are each composed of a valve seat (23), a handle (24), a connecting rod 1 (25), a connecting rod 2 (26), a flower shaft (27), a V-shaped limiter (28) and a blocking body (29); the valve seat (23) is fixedly connected to one side of the air supply pipe (3); one end of the handle (24) is hinged to the valve seat (23); one end of the connecting rod 1 (25) is hinged to the handle (24) ) are hinged, one end of the connecting rod 2 (26) is hinged to the connecting rod 1 (25), the V-shaped limiter (28) is located inside the blocking body (29) and is fixedly connected to one end of the connecting rod 2 (26) away from the connecting rod 1 (25) through the flower axis (27), the flower axis (27) is rotatably connected to the inside of the blocking body (29), and the inside of the blocking body (29) is provided with an inner chamber (30) matching the flower axis (27) and the V-shaped limiter (28).

2. A local cooling device for strip steel according to claim 1, characterized in that: The cooling box (1) is provided with a strip steel inlet and outlet (31) in the middle of the front and back sides, and an auxiliary support roller (32) is rotatably arranged at the bottom end of the strip steel inlet and outlet (31).

3. A local cooling device for strip steel according to claim 1, characterized in that: The first cooling air hood (8) is fixedly connected to the inner wall of the cooling box (1) via a plurality of hanging ears (33), and the second cooling air hood (9) is fixedly connected to the inner wall of the cooling box (1) via a plurality of supports (34).

4. A local cooling device for strip steel according to claim 1, characterized in that: The cross-sectional areas of the five air supply inner cavities (18) are the same.

5. A local cooling device for strip steel according to claim 1, characterized in that: A vertical through groove (35) matching the flower axis (27) is provided in the middle of the front and back sides of the blocking body (29), and the width of the vertical through groove (35) is greater than the diameter of the flower axis (27).

6. A local cooling device for strip steel according to claim 1, characterized in that: A rotating wheel 1 (36) and a rotating wheel 2 (37) are rotatably arranged at one end of the V-shaped limiting body (28) away from the flower axis (27).

7. A local cooling device for strip steel according to claim 1, characterized in that: The valve seat (23) is provided with a plurality of positioning holes (38), and the handle (24) is provided with a spring limiting buckle (39) matching the positioning holes (38).

8. A local cooling device for strip steel according to claim 1, characterized in that: The heat exchanger (5) is composed of a heat exchange shell (40), a heat exchange coil (41), a water inlet connection port (42) and a water discharge connection port (43); the heat exchange coil (41) is fixedly connected to the interior of the heat exchange shell (40), and the water inlet connection port (42) and the water discharge connection port (43) are respectively fixedly connected to both ends of the heat exchange coil (41).

9. A local cooling device for strip steel according to claim 1, characterized in that: The auxiliary flow guiding assembly (15) is composed of a first flow guiding unit (44) and a second flow guiding unit (45), and the first flow guiding unit (44) and the second flow guiding unit (45) are respectively connected to two sides of the bottom end inside the outer cover body (12).

10. A local cooling device for strip steel according to claim 9, characterized in that: The first air guide unit (44) and the second air guide unit (45) are both composed of an electric telescopic rod (46), an L-shaped driving arm (47), a plurality of pull rods (48), a plurality of strip air guide plates (49) and a plurality of rotating shafts (50). The electric telescopic rod (46) is fixedly connected to the bottom end of the side of the outer cover body (12), and the strip air guide plate (49) is rotatably connected to the bottom end inside the outer cover body (12) through the rotating shaft (50). The pull rod (48) is fixedly connected to one end of the rotating shaft (50), and the other end of the pull rod (48) is hinged to the L-shaped driving arm (47). A vertical limit groove (51) is provided at one end of the L-shaped driving arm (47) close to the electric telescopic rod (46), and a movable wheel (52) located inside the vertical limit groove (51) is rotatably provided at one end of the side of the electric telescopic rod (46).

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