Search

CN-224199426-U - Slow cooling device for improving cooling rate of steel plate

CN224199426UCN 224199426 UCN224199426 UCN 224199426UCN-224199426-U

Abstract

The utility model relates to the technical field of steel plate cooling, in particular to a slow cooling device for improving the cooling rate of a steel plate, which comprises a slow cooling rack and a frame body positioned at one side of the slow cooling rack, wherein three rows of axial flow fans are arranged in the frame body in an array manner, a first axial flow fan unit, a second axial flow fan unit and a third axial flow fan unit are sequentially formed from bottom to top, the second axial flow fan unit is higher than the upper surface of the slow cooling rack, an air blowing unit and a water spraying unit are arranged between air outlets of the second axial flow fan unit and the third axial flow fan unit, and the air blowing unit and the water spraying unit form a convection atomization mechanism, so that water vapor sprayed by the water spraying unit is blown to the steel plate of the slow cooling rack through the axial flow fans after being blown and mixed by the air blowing unit. According to the utility model, three layers of axial flow fans form three-dimensional convection, the air blowing and water showering of the middle layer cooperate to strengthen heat exchange efficiency, so that rapid air flow on the surface of the steel plate is realized, the air cooling rate of the steel plate of the cooling bed is improved, and the purpose of rapid cooling is achieved.

Inventors

  • ZHENG JUN
  • LUO BO
  • LING YUN
  • MIN JIE
  • TANG ZHENYUAN

Assignees

  • 南京钢铁股份有限公司

Dates

Publication Date
20260505
Application Date
20250523

Claims (7)

  1. 1. The utility model provides a promote slow cooling device of steel sheet cooling rate, includes slow cooling rack (40) and is located frame body (10) of its one side, its characterized in that, array form is provided with three row axial fan in frame body (10), and three row axial fan constitutes first axial fan unit (21), second axial fan unit (22) and third axial fan unit (23) from bottom to top in proper order, and wherein second axial fan unit (22) are higher than the upper surface of slow cooling rack (40), and is provided with air-blowing unit (31) and water drenching unit (32) between second axial fan unit (22) and third axial fan unit (23) air-out department layer by layer respectively, and air-blowing unit (31) and water drenching unit (32) constitute convection atomizing mechanism (30) for water drenching unit (32) blow out steel sheet (50) of water through axial fan blow to slow cooling rack (40) after air-blowing mixing of air-blowing unit (31).
  2. 2. The slow cooling device according to claim 1, wherein the air blowing unit (31) comprises an air blowing pipe (310) and a plurality of air blowing nozzles connected thereto, and the water spraying unit (32) comprises a water spraying pipe (320) and a plurality of anti-blocking solid cone water spraying nozzles connected thereto.
  3. 3. The slow cooling device according to claim 1, further comprising a slide rail frame (61) connected to the frame body (10), wherein a baffle plate (62) is slidably connected to the slide rail frame (61), such that the baffle plate (62) shields a part of the operation area of the convection atomizing mechanism (30) on the slide rail frame (61).
  4. 4. The slow cooling device according to claim 1, wherein the three rows of axial flow fans are 33 m long and 2.7 m high, 30 axial flow fans are distributed in each row, the interval between the upper layer and the lower layer of the axial flow fans is 0.885m, and the transverse interval is 1m.
  5. 5. The slow cooling device according to claim 1, wherein fan blades of the axial flow fan are made of aviation grade aluminum alloy materials, the air volume range of the axial flow fan is 15000-20000m3/h, the air pressure is 200-300Pa, and the motor power is 2-3.5kW.
  6. 6. The slow cooling device of claim 1, wherein the axial flow fan is inclined downward by 15-20 °.
  7. 7. The slow cooling device according to claim 2, wherein the working pressure of the anti-blocking solid cone water spray nozzle is 0.2-0.5MPa, the diameter of atomized particles is 80-120 μm, and the water flow rate of the nozzle is 10-15L/min.

Description

Slow cooling device for improving cooling rate of steel plate Technical Field The utility model relates to the technical field of steel plate cooling, in particular to a slow cooling device for improving the cooling rate of a steel plate. Background In the steel production flow, the slow cooling link of the steel plate has a decisive influence on the quality of the final product, the slow cooling of the early steel plate depends on natural cooling, the speed is slow, the slow cooling cannot conform to the modern large-scale and high-efficiency production rhythm, the production period is long, and the productivity is seriously restricted to be improved. The application provides a slow cooling device for improving the cooling rate of a steel plate, which is characterized in that a single forced cooling mode, such as a simple axial flow fan, can accelerate air flow, but is difficult to ensure cooling speed and uniformity when facing complex working conditions and steel plates with different specifications, and single pure water spray cooling can rapidly cool down, but causes mass defects of deformation, warping and the like to frequently occur due to overlarge local temperature difference, and meanwhile, the problems of water resource waste and water stain residue exist, and the problems of general cooling efficiency and water stain residue exist. Disclosure of utility model In order to solve the technical problems, the utility model provides the slow cooling device for improving the cooling rate of the steel plate, three layers of axial flow fans form three-dimensional convection, the middle layer air blowing and water spraying cooperate to strengthen the heat exchange efficiency, the rapid air flow on the surface of the steel plate is realized, the cooling rate of the steel plate of a cooling bed is improved, and the aim of rapid cooling is achieved. The slow cooling device for improving the cooling rate of the steel plate comprises a slow cooling rack and a frame body positioned on one side of the slow cooling rack, wherein three rows of axial flow fans are arranged in an array manner in the frame body, the three rows of axial flow fans sequentially form a first axial flow fan unit, a second axial flow fan unit and a third axial flow fan unit from bottom to top, the second axial flow fan unit is higher than the upper surface of the slow cooling rack, an air blowing unit and a water spraying unit are respectively arranged between the air outlet positions of the second axial flow fan unit and the third axial flow fan unit layer by layer, and the air blowing unit and the water spraying unit form a convection atomization mechanism, so that water sprayed by the water spraying unit is blown to the steel plate of the slow cooling rack through the axial flow fans after being mixed by the air blowing of the air blowing unit. Further, the air blowing unit comprises an air blowing pipe and a plurality of air blowing nozzles connected with the air blowing pipe, and the water spraying unit comprises a water spraying pipe and a plurality of anti-blocking solid cone water spraying nozzles connected with the water spraying pipe. Further, the device also comprises a sliding rail frame connected to the frame body, wherein the sliding rail frame is connected with a baffle plate in a sliding manner, so that the baffle plate shields part of the operation area of the convection atomizing mechanism on the sliding rail frame. Further, the whole length of the three rows of axial flow fans is 33 meters, the height is 2.7 meters, 30 axial flow fans are distributed in each row, the distance between the upper layer and the lower layer of the axial flow fans is 0.885m, and the transverse distance is 1m. Further, the fan blade of the axial flow fan is made of aviation grade aluminum alloy, the air volume range of the axial flow fan is 15000-20000m < 3 >/h, the air pressure is 200-300Pa, and the motor power is 2-3.5kW. Further, the axial flow fan is inclined downwards by 15-20 degrees. Furthermore, the working pressure of the anti-blocking solid cone water spray nozzle is 0.2-0.5MPa, the diameter of atomized particles is 80-120 mu m, and the water flow rate of the nozzle is 10-15L/min. The three-layer axial flow fan in the slow cooling device provided by the utility model has the beneficial effects that three-layer axial flow fans form three-dimensional convection, the air blowing and water showering of the middle layer are synergistic, the heat exchange efficiency is enhanced, the rapid air flow on the surface of the steel plate is realized, the air cooling rate of the steel plate of the cooling bed is improved, the purpose of rapid cooling is achieved, the cooling time of the steel plate is shortened by 40% -50%, the production rhythm is effectively accelerated, the performance quality of the steel plate is ensured, the position of the baffle plate in the slow cooling device is adjustable, and the operation area of cooling water vapor c