Hot rolled steel cooling device

Abstract

The invention discloses a hot rolled steel cooling device, which belongs to the field of steel rolling equipment and comprises an equipment frame and a conveying plate penetrating through the equipment frame. An upper cover is arranged above the equipment frame, a hanging bracket is arranged in the upper cover part, and a cooling nozzle structure is mounted below the hanging bracket; an exhaust hood is arranged at the top of the hanging bracket, and a position and pipeline through hole is formed in the hanging bracket; the cooling nozzle structure comprises a four-corner airflow pipe and a cooling water pipeline; conveying rollers are arranged at the two ends of the conveying plate, and a plurality of gas bearing structures are arranged on the conveying plate; the gas bearing structure comprises a bearing pad and a sealing barrel, the bearing pad is movably connected into the sealing barrel, and the gas bearing structure can accelerate the flowing speed of water in the center of the rolled piece in the mode that the middle is high and the edges are low after the four corners of the rolled piece are cooled, heat exchange is increased, and the heat dissipation efficiency of the middle is improved.

Description

Technical Field

[0001] The invention belongs to the field of steel rolling equipment, and in particular relates to a hot-rolled steel cooling device. Background Art

[0002] As the market's performance requirements for steel strip products continue to increase, hot-rolled steel strips are gradually developing towards low carbon content and high strength. The high strength of hot-rolled steel strips requires that the internal structure of the steel strip has a high degree of fine graining and a relatively uniform grain distribution. In industrial production, this requirement can be achieved from two aspects.

[0003] One method is to roll the steel strip under low temperature and high pressure; another method is to quickly cool the steel strip after a period of time after rolling to obtain a steel strip product with a high degree of fine graining. This method is a relatively easy-to-implement technical approach in the manufacturing process of hot-rolled steel plates.

[0004] Through the study of the second method, it was found that during the cooling process, the water in the middle of the rolled piece needs to flow through the edge to be discharged, resulting in the cooling intensity of the edge of the rolled piece being greater than that of the middle, causing a temperature difference between the middle and edge of the rolled piece, which will affect the subsequent product cooling. Summary of the invention

[0005] The object of the present invention is to provide a hot rolled steel cooling device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a hot-rolled steel cooling device, comprising an equipment frame and a conveying plate, wherein the conveying plate penetrates the equipment frame;

[0007] An upper cover is provided above the equipment rack, a hanger is provided inside the upper cover, and a cooling nozzle structure is installed below the hanger;

[0008] An exhaust hood is provided on the top of the hanger, and the hanger is installed in the upper hood of the equipment rack through beams on both sides, and positions and pipeline holes are provided on the hanger;

[0009] The cooling nozzle structure includes four-corner airflow pipes and a cooling water pipeline, wherein the four-corner airflow pipes are fixed on the four corners of the cooling water pipeline;

[0010] Conveying rollers are provided at both ends of the conveying plate, and a plurality of groups of gas bearing structures are provided on the conveying plate;

[0011] The gas load-bearing structure comprises a load-bearing pad and a sealing tube, and the load-bearing pad is movably connected in the sealing tube.

[0012] Preferably, the equipment rack includes a supporting structure and guide plates located on both sides of the conveying plate, and the guide plates are located between the supporting structure and the upper cover part.

[0013] Preferably, guide grooves are provided on both sides of the hanger, and limit plates are slidably connected in the guide grooves. The limit plates are fixedly connected to the cover box, and multiple groups of electric push rods are provided between the cover box and the hanger. The roots of the electric push rods are fixedly connected to the lower surface of the hanger.

[0014] Preferably, the four-corner airflow pipes are divided into two groups and are symmetrically arranged on both sides of the cooling water pipeline, and the four-corner airflow pipes in the same group are connected to each other by a heat preservation plate.

[0015] Preferably, a trumpet-shaped outlet is provided at the bottom outlet of the cooling water pipeline.

[0016] Preferably, a sealing ring is provided at the bottom of the load-bearing pad, a limiting ring is provided at the mouth of the sealing cylinder, and compressible gas located in the sealing cylinder is provided below the sealing ring.

[0017] Preferably, the sealing cylinder is fixedly mounted on the conveying plate, and a load-bearing plate is provided at the bottom of the sealing cylinder.

[0018] Preferably, the conveying plate is provided with supporting ribs, and the height of the supporting ribs is lower than the height of the load-bearing pad in a natural state.

[0019] Preferably, the arc surface is arranged at the root of the second box body, and a magnetic attraction layer is provided below the arc surface.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The four-corner airflow pipe and the cooling water pipe of the present invention can cooperate with each other to enable the cooling water sprayed on the rolled piece to flow quickly, so that the cooling water can evenly cover the surface of the rolled piece, and the water vapor generated by cooling can be quickly dispersed to avoid the high concentration of water vapor affecting the subsequent heat dissipation;

[0022] 2. The gas load-bearing structure provided in the present invention can lift the workpiece when the temperature of the workpiece is high, providing sufficient space for heat dissipation at the bottom of the workpiece. At the same time, after the four corners of the workpiece are cooled, the flow rate of water at the center of the workpiece is accelerated through the high edge bottom in the middle, thereby increasing heat exchange and improving the heat dissipation efficiency in the middle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 A top view of the present invention;

[0025] Figure 3 for Figure 2 Sectional structure diagram at inner AA;

[0026] Figure 4for Figure 3 A magnified view of the structure at inner B;

[0027] Figure 5 It is a schematic diagram of the hanger and cooling nozzle structure;

[0028] Figure 6 Schematic diagram of the cooling nozzle structure.

[0029] In the figure: 1-equipment frame; 11-support structure; 12-guide plate; 2-conveying plate; 21-support ribs; 3-hanger; 33-pipe through hole; 34-guide groove; 35-limiting plate; 36-electric push rod; 32-cover box; 4-cooling nozzle structure; 41-four-corner air flow pipe; 42-cooling water pipeline; 5-exhaust hood; 6-conveying roller; 61-electric push rod; 7-gas load-bearing structure; 71-load-bearing pad; 72-sealing cylinder; 73-sealing ring; 74-limiting ring; 75-load-bearing plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 6 , the present invention provides a technical solution: a hot-rolled steel cooling device, comprising an equipment frame 1 and a conveying plate 2, wherein the conveying plate 2 penetrates the equipment frame 1;

[0032] An upper cover is provided above the equipment frame 1, a hanger 3 is provided inside the upper cover, a cooling nozzle structure 4 is installed below the hanger 3, and the cooling nozzle structure 4 can spray cooling water for cooling the rolled piece;

[0033] An exhaust hood 5 is provided on the top of the hanger 3. The hanger 3 is installed in the upper cover of the equipment rack 1 through the cross beams on both sides. The hanger 3 is provided with a position and a pipe through hole 33. An exhaust fan is provided on the side of the exhaust hood 5. At the same time, a recovery hood arranged between the hangers 3 is provided below the exhaust hood 5. Driven by the exhaust fan, the generated water vapor is recovered through the recovery hood, the flow of water vapor is accelerated, and the heat dissipation is enhanced. The pipe through hole 33 is used to guide the pipes on the four-corner airflow pipe 41 and the cooling water pipe 42 to be connected with the external pump body;

[0034] The cooling nozzle structure 4 includes a four-corner airflow pipe 41 and a cooling water pipe 42. The four-corner airflow pipe 41 is fixed on the four corners of the cooling water pipe 42. The four-corner airflow pipe 41 is used to spray airflow to drive the water in the cooling water pipe 42 to flow on the surface of the rolled piece, and at the same time, help the generated water vapor to flow;

[0035] Conveying rollers 6 are provided at both ends of the conveying plate 2. A plurality of gas bearing structures 7 are provided on the conveying plate 2. The conveying rollers 6 are provided at both ends of the conveying plate 2 to drive the rolled piece to move.

[0036] The gas bearing structure 7 includes a bearing pad 71 and a sealing tube 72 . The bearing pad 71 is movably connected in the sealing tube 72 . The bearing pad 71 is made of a material with good thermal conductivity such as copper alloy, so that the heat of the rolled piece can enter the sealing tube 72 .

[0037] In this embodiment, the equipment frame 1 includes a support structure 11 and guide plates 12 located on both sides of the conveying plate 2. The guide plates 12 are located between the support structure 11 and the upper cover part. The guide plates 12 are used to limit the deviation of the rolled piece.

[0038] In this embodiment, guide grooves 34 are provided on both sides of the hanger 3, and limit plates 35 are slidably connected in the guide grooves 34. The limit plates 35 are fixedly connected to the cover box 32. A plurality of groups of electric push rods 36 are provided between the cover box 32 and the hanger 3. The roots of the electric push rods 36 are fixedly connected to the lower surface of the hanger 3. The cover box 32 can move up and down by being driven by the electric push rods 36 to adjust the upper and lower positions of the cooling nozzle structure 4.

[0039] In this embodiment, the four-corner airflow tubes 41 are divided into two groups and are symmetrically arranged on both sides of the cooling water pipe 42. The four-corner airflow tubes 41 in the same group are connected by insulation plates. A trumpet-shaped outlet is provided at the bottom outlet of the cooling water pipe 42. The cooling water pipe 42 is used to spray cooling water, and the four-corner airflow tubes 41 are used to spray air.

[0040] In this embodiment, a sealing ring 73 is provided at the bottom of the load-bearing pad 71, a limiting ring 73 is provided at the mouth of the sealing tube 72, and a compressible gas is provided below the sealing ring 73 in the sealing tube 72. When the workpiece is just placed on the conveying plate 2, due to the high temperature, the heat will be conducted to the sealing tube 72 through the load-bearing pad 71, and the workpiece will be lifted by the expansion of the gas, so that there is space for heat dissipation at the bottom of the workpiece. When the workpiece is cooled, the edge is cooled first, which will cause the load-bearing pad 71 at the edge position to drop, and cooperate with the self-gravity of the workpiece to form an arch with a low edge and a high middle.

[0041] In this embodiment, the sealing cylinder 72 is fixedly mounted on the conveying plate 2 , and a load-bearing plate 75 is provided at the bottom of the sealing cylinder 72 for fixing the gas load-bearing structure 7 .

[0042] In this embodiment, the conveying plate 2 is provided with supporting ribs 21 , and the height of the supporting ribs 21 is lower than the height of the load-bearing pad 71 in a natural state, so as to ensure that the rolled piece can correctly contact the load-bearing pad 71 first.

[0043] Working principle: The workpiece is conveyed to the conveying plate 2 through the conveying roller 6, and then the workpiece contacts the load-bearing pad 71. Due to the high temperature, the heat will be conducted to the sealing tube 72 through the load-bearing pad 71, and the workpiece will be lifted by gas expansion, so that there is space at the bottom of the workpiece for heat dissipation, and then the cooling water pipe 42 is used to spray cooling water, and the four-corner air flow pipe 41 is used to spray air to cool the workpiece. At this time, the edge of the workpiece is cooled first, which will cause the load-bearing pad 71 at the edge position to drop, and cooperate with the self-gravity of the workpiece to form an arch with a bottom edge and a high middle part. The flow rate of water at the center of the workpiece is accelerated by the high middle part and the bottom edge, thereby increasing heat exchange and improving the heat dissipation efficiency in the middle.

[0044] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A hot rolled steel cooling device, characterized in that: It comprises an equipment frame (1) and a conveying plate (2), wherein the conveying plate (2) passes through the equipment frame (1); An upper cover is provided above the equipment frame (1), a hanger (3) is provided inside the upper cover, and a cooling nozzle structure (4) is installed below the hanger (3); An exhaust hood (5) is provided on the top of the hanger (3); the hanger (3) is installed in the upper hood of the equipment rack (1) through beams on both sides; and positions and pipeline through holes (33) are provided on the hanger (3); The cooling nozzle structure (4) comprises a four-corner airflow pipe (41) and a cooling water pipeline (42), wherein the four-corner airflow pipe (41) is fixed on the four corners of the cooling water pipeline (42); Conveying rollers (6) are provided at both ends of the conveying plate (2), and a plurality of groups of gas bearing structures (7) are provided on the conveying plate (2); The gas load-bearing structure (7) comprises a load-bearing pad (71) and a sealing tube (72), and the load-bearing pad (71) is movably connected in the sealing tube (72).

2. A hot rolled steel cooling device according to claim 1, characterized in that: The equipment rack (1) comprises a supporting structure (11) and guide plates (12) located on both sides of a conveying plate (2), wherein the guide plates (12) are located between the supporting structure (11) and an upper cover portion.

3. A hot rolled steel cooling device according to claim 1, characterized in that: Guide grooves (34) are provided on both sides of the hanger (3), and limit plates (35) are slidably connected in the guide grooves (34). The limit plates (35) are fixedly connected to the cover box (32). A plurality of groups of electric push rods (36) are provided between the cover box (32) and the hanger (3), and the roots of the electric push rods (36) are fixedly connected to the lower surface of the hanger (3).

4. A hot rolled steel cooling device according to claim 1, characterized in that: The four-corner airflow pipes (41) are divided into two groups and are symmetrically arranged on both sides of the cooling water pipeline (42), and the four-corner airflow pipes (41) in the same group are connected to each other by a heat preservation plate.

5. The hot rolled steel cooling device according to claim 1, characterized in that: A trumpet-shaped outlet is provided at the bottom outlet of the cooling water pipeline (42).

6. A hot rolled steel cooling device according to claim 1, characterized in that: A sealing ring (73) is provided at the bottom of the load-bearing pad (71), a limiting ring (74) is provided at the mouth of the sealing cylinder (72), and compressible gas located in the sealing cylinder (72) is provided below the sealing ring (73).

7. A hot rolled steel cooling device according to claim 6, characterized in that: The sealing cylinder (72) is fixedly mounted on the conveying plate (2), and a load-bearing plate (75) is provided at the bottom of the sealing cylinder (72).

8. The hot rolled steel cooling device according to claim 1, characterized in that: The conveying plate (2) is provided with supporting ribs (21), and the height of the supporting ribs (21) is lower than the height of the load-bearing pad (71) in a natural state.

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