Closed primary rolling workshop air cooling line

Abstract

The utility model discloses a closed primary rolling workshop air cooling line which comprises steel rolling equipment, a conveying device is arranged at the front end of the steel rolling equipment, and an air cooling mechanism is arranged above the conveying device. The air duct is arranged at the upper end of the interior of the air cooling mechanism, and a dust filtering mechanism is arranged at an air inlet of the air duct; the first air cooling cavity is arranged at the rear end of the lower part of the air duct; the second air cooling cavity is formed in the middle of the lower portion of the air channel, semiconductor electronic refrigeration pieces are fixedly installed on the two sides of the inner wall of the second air cooling cavity, and cold guide plates are installed at the cold ends of the semiconductor electronic refrigeration pieces; and the third air cooling cavity is formed in the front end of the lower portion of the air channel, an evaporator is installed in the third air cooling cavity, negative pressure fans are installed at the bottoms of the first air cooling cavity, the second air cooling cavity and the third air cooling cavity correspondingly, and the problems that in the process that cooling equipment cools steel, deformation is prone to occurring, and the performance of the steel is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling cooling, in particular to a closed air cooling line in a rolling workshop. Background Art

[0002] The air cooling line in the primary rolling mill is an essential and critical component of the steel rolling process, primarily responsible for rapidly cooling the rolled steel. With the rapid development of the steel industry and technological advancements, the design, manufacturing, and operation of air cooling lines in primary rolling mills are constantly improving. These lines typically consist of multiple cooling sections, each equipped with an efficient fan system and precise control system. The fan system generates powerful airflow to rapidly cool the rolled steel, thereby controlling its microstructure and properties.

[0003] For example, the Chinese patent application CN111940519A, "A Multi-stage Cooling System for a Steel Rolling Production Line," includes a conveyor frame and a heat exchanger. The heat exchanger is equipped with an air inlet and an air outlet duct, and a heat exchange tube within the heat exchanger. The two ends of the heat exchange tube are connected to a liquid inlet and a liquid outlet, respectively. The conveyor frame is equipped with an atomizing spray zone, a direct current spray zone, a swirl spray zone, and a cold air dispersing zone. In this multi-stage cooling system for a steel rolling production line, as workpieces move on the conveyor frame, they are first sprayed with liquid from an atomizing nozzle for cooling. Direct current spraying cools the workpiece in all directions while simultaneously impacting it in a linear manner to remove surface oxide scale. Swirl spraying cools the workpiece surface with a swirling liquid flow and removes surface oxide scale. The cold air dispersing zone uses airflow impact cooling to remove surface oxide scale.

[0004] Although the above-mentioned existing technology can cool the steel, the temperature of the steel discharged from the rolling equipment is relatively high. Although direct low-temperature cooling improves the cooling efficiency, it is easy to cause the performance of the steel to decline and deformation to occur. Therefore, it does not meet the existing needs. In this regard, we propose a closed air cooling line for the first rolling workshop. Utility Model Content

[0005] The purpose of the utility model is to provide a closed air cooling line for a rolling mill to solve the problem that the cooling equipment proposed in the above background technology is prone to deformation and degradation of steel performance during cooling of steel.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a closed air cooling line for a rolling mill, comprising a steel rolling mill, a conveying device provided at the front end of the steel rolling mill, a material discharge port of the steel rolling mill being flush with the conveying device, an air cooling mechanism provided above the conveying device, and the air cooling mechanism and the conveying device being fixed by bolts; and further comprising:

[0007] An air duct is provided at the upper end of the air cooling mechanism, and a dust filtering mechanism is provided at the air inlet of the air duct;

[0008] a first air cooling chamber, which is arranged at the rear end below the air duct;

[0009] A second air-cooling chamber is provided at a middle position below the air duct, wherein semiconductor electronic refrigeration sheets are fixedly mounted on both sides of the inner wall of the second air-cooling chamber, and a cold end of the semiconductor electronic refrigeration sheet is mounted with a cold conduction plate;

[0010] The third air cooling chamber is arranged at the front end below the air duct. An evaporator is installed inside the third air cooling chamber. Negative pressure fans are installed at the bottoms of the first air cooling chamber, the second air cooling chamber and the third air cooling chamber.

[0011] Preferably, the hot ends of the semiconductor electronic refrigeration plates are each provided with a heat dissipation mechanism, and the heat dissipation mechanism is located outside the air cooling mechanism, and the heat dissipation mechanism is composed of heat dissipation fins and a heat dissipation fan.

[0012] Preferably, the third air-cooling chamber is provided with a medium cooling mechanism outside the air-cooling mechanism, and the medium cooling mechanism includes a condenser, a compression chamber and a throttling device, and the condenser, the compression chamber and the throttling device are connected to the evaporator through a medium delivery pipe.

[0013] Preferably, the cooling plates on the semiconductor electronic refrigeration plates on both sides are staggered with respect to each other.

[0014] Preferably, the dust filtering mechanism includes a dustproof net and a primary filter, and the dustproof net is located in front of the primary filter.

[0015] Preferably, the front and rear ends of the air cooling mechanism are both provided with material ports, the upper ends of the interiors of the material ports are both equipped with electric push rods, and the movable ends of the electric push rods are equipped with adjustment plates.

[0016] Preferably, the negative pressure fans inside the first air-cooling chamber are distributed in a rectangular array.

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

[0018] The steel is cooled by the air in the second cooling chamber, and the air in the second cooling chamber is cooled by the air in the third cooling chamber.

[0019] 2. The utility model provides a dust filtering mechanism at the air inlet of the air duct. When the air cooling line starts working, air is sucked into the air duct through the air inlet. At this time, the dust net plays a role first, effectively intercepting larger particles in the air, such as dust, impurities, etc. The air that has been preliminarily filtered by the dust net then enters the primary filter. The primary filter can further remove the solid particles in the air, so that the air that contacts the steel can remain clean, avoiding the quality degradation caused by dust particles adhering to the surface of the steel.

[0020] 3. The utility model provides adjustment plates at the front and rear ends of the air cooling mechanism. By turning on the electric push rod, its movable end can drive the adjustment plate to move up and down, thereby controlling the size of the vertical space of the material opening. It can then be flexibly adjusted according to the thickness of the hot-rolled steel, ensuring that the air cooling mechanism remains relatively sealed, thereby further improving the air cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0023] Figure 3 This is a top view of the interior upper end of the air cooling mechanism of the present invention;

[0024] Figure 4 This is a three-dimensional view of the interior of the rear end of the air cooling mechanism of the present invention.

[0025] In the figure: 1. Steel rolling equipment; 2. Conveying device; 3. Air cooling mechanism; 4. Dust filtering mechanism; 5. Material inlet; 6. Adjustment plate; 7. Heat dissipation mechanism; 8. Electric push rod; 9. Air duct; 10. First air cooling chamber; 11. Negative pressure fan; 12. Second air cooling chamber; 13. Semiconductor electronic refrigeration plate; 14. Cold conduction plate; 15. Third air cooling chamber; 16. Evaporator; 17. Medium cooling mechanism; 18. Dust screen; 19. Primary filter. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] See also Figure 1-4 The utility model provides an embodiment of a closed air cooling line for a rolling mill, comprising a steel rolling equipment 1, a conveying device 2 being provided at the front end of the steel rolling equipment 1, and a discharge port of the steel rolling equipment 1 being flush with the conveying device 2, an air cooling mechanism 3 being provided above the conveying device 2, and the air cooling mechanism 3 being fixed to the conveying device 2 by bolts; and further comprising:

[0028] The air duct 9 is provided at the upper end of the air cooling mechanism 3, and the dust filter mechanism 4 is provided at the air inlet of the air duct 9;

[0029] A first air cooling chamber 10 is provided at the rear end below the air duct 9;

[0030] A second air cooling chamber 12 is provided in the middle position below the air duct 9. Semiconductor electronic refrigeration sheets 13 are fixedly mounted on both sides of the inner wall of the second air cooling chamber 12. A cold conducting plate 14 is mounted on the cold end of the semiconductor electronic refrigeration sheet 13.

[0031] The third air cooling chamber 15 is arranged at the front end below the air duct 9. An evaporator 16 is installed inside the third air cooling chamber 15. Negative pressure fans 11 are installed at the bottoms of the first air cooling chamber 10, the second air cooling chamber 12 and the third air cooling chamber 15.

[0032] During use, after the hot-rolled steel enters the air cooling mechanism 3 from the steel rolling equipment, it is preferentially located below the first air cooling chamber 10. Under the action of the negative pressure fan 11, the workshop room temperature air is blown to the surface of the steel, and it is cooled by using the smaller temperature difference. Then it enters the bottom of the second air cooling chamber 12. A semiconductor electronic refrigeration plate 13 is provided inside the second air cooling chamber 12. The cold end of the semiconductor electronic refrigeration plate 13 generates cold energy, which cools the air in the second air cooling chamber 12 through the cold conduction plate 14, and then is blown to the surface of the steel through the negative pressure fan 11, forming a secondary cooling of the steel. Finally, it enters the bottom of the third air cooling chamber 15. Under the action of the compressor, the coolant circulates in the evaporator 16 and the condenser, absorbs heat at the evaporator position, and sharply cools the air in this area. Then, in conjunction with the negative pressure fan 11, the cold energy is blown to the surface of the steel, forming a tertiary cooling.

[0033] See also Figure 1 and Figure 3 The hot end of the semiconductor electronic refrigeration plate 13 is provided with a heat dissipation mechanism 7, and the heat dissipation mechanism 7 is located outside the air cooling mechanism 3. The heat dissipation mechanism 7 is composed of heat dissipation fins and a heat dissipation fan. When direct current passes through a galvanic couple composed of two different types of semiconductor materials connected in series, heat dissipation and absorption are respectively realized at both ends of the galvanic couple, and a cold end is formed at one end face of the semiconductor electronic refrigeration plate 13. The heat dissipation fins and the heat dissipation fan in the heat dissipation mechanism 7 can accelerate the heat dissipation of the hot end.

[0034] See also Figure 3 The third air-cooling chamber 15 is located outside the air-cooling mechanism 3 and is provided with a medium cooling mechanism 17. The medium cooling mechanism 17 includes a condenser, a compression chamber and a throttling device, and the condenser, the compression chamber and the throttling device are connected to the evaporator 16 through a medium delivery pipe. The refrigerant first passes through the compressor to become a high-pressure gas, and then passes through the condenser to condense and release heat to become a high-pressure liquid. The high-pressure liquid passes through the throttling device to become a low-temperature and low-pressure liquid, and then evaporates through the evaporator to absorb heat and become a low-temperature and low-pressure gas, absorbing heat from the air inside the third air-cooling chamber.

[0035] See also Figure 3 The cooling plates 14 on the semiconductor electronic refrigeration sheets 13 on both sides are staggered with respect to each other, thereby improving the cooling effect on the air.

[0036] See also Figure 4 The dust filtering mechanism 4 includes a dustproof net 18 and a primary filter 19, and the dustproof net 18 is located in front of the primary filter 19, so that the air contacting the steel can remain clean and avoid the quality degradation caused by dust particles adhering to the surface of the steel.

[0037] See also Figure 1 、 Figure 2 and Figure 4The front and rear ends of the air cooling mechanism 3 are both provided with a material port 5, the upper end of the interior of the material port 5 is installed with an electric push rod 8, and the movable end of the electric push rod 8 is installed with an adjusting plate 6.

[0038] See also Figure 3 The negative pressure fans 11 inside the first air cooling chamber 10 are distributed in a rectangular array.

[0039] Working principle: When in use, by turning on the electric push rod 8, its movable end can drive the adjustment plate 6 to rise and fall, thereby controlling the size of the vertical space of the material port 5, so that it can be flexibly adjusted according to the thickness of the steel after hot rolling, ensuring that the air cooling mechanism remains relatively sealed. When the air cooling line starts working, air is sucked into the air duct 9 through the air inlet. At this time, the dustproof net 18 plays a role first, effectively intercepting larger particles in the air, such as dust, impurities, etc. The air that has been preliminarily filtered by the dustproof net 18 then enters the primary filter 19. The primary filter 19 can further remove particulate solids in the air, so the air that contacts the steel can remain clean, avoiding the quality degradation caused by dust particles adhering to the surface of the steel.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A closed air-cooling line for a rolling mill, comprising a steel rolling equipment (1), a conveying device (2) being provided at the front end of the steel rolling equipment (1), a discharge port of the steel rolling equipment (1) being flush with the conveying device (2), an air-cooling mechanism (3) being provided above the conveying device (2), and the air-cooling mechanism (3) being fixed to the conveying device (2) by bolts; Its characteristics are: Also includes: An air duct (9) is provided at the upper end of the air cooling mechanism (3), and a dust filtering mechanism (4) is provided at the air inlet of the air duct (9); a first air cooling chamber (10) arranged at the rear end below the air duct (9); A second air-cooling chamber (12) is arranged at a middle position below the air duct (9), semiconductor electronic refrigeration sheets (13) are fixedly mounted on both sides of the inner wall of the second air-cooling chamber (12), and a cold end of the semiconductor electronic refrigeration sheet (13) is mounted with a cold conduction plate (14); A third air-cooling chamber (15) is arranged at the front end below the air duct (9); an evaporator (16) is installed inside the third air-cooling chamber (15); and negative pressure fans (11) are installed at the bottoms of the first air-cooling chamber (10), the second air-cooling chamber (12), and the third air-cooling chamber (15).

2. The closed air cooling line for a rolling mill according to claim 1, characterized in that: The hot ends of the semiconductor electronic refrigeration sheets (13) are all provided with heat dissipation mechanisms (7), and the heat dissipation mechanisms (7) are located outside the air cooling mechanism (3). The heat dissipation mechanisms (7) are composed of heat dissipation fins and a heat dissipation fan.

3. The closed air cooling line for a rolling mill according to claim 1, characterized in that: The third air-cooling chamber (15) is located outside the air-cooling mechanism (3) and is provided with a medium cooling mechanism (17). The medium cooling mechanism (17) includes a condenser, a compression chamber and a throttling device, and the condenser, the compression chamber and the throttling device are connected to the evaporator (16) through a medium delivery pipe.

4. The closed air cooling line for a rolling mill according to claim 1, characterized in that: The cooling plates (14) on the semiconductor electronic refrigeration sheets (13) on both sides are staggered with respect to each other.

5. The closed air cooling line for a rolling mill according to claim 1, characterized in that: The dust filtering mechanism (4) comprises a dustproof net (18) and a primary filter (19), and the dustproof net (18) is located in front of the primary filter (19).

6. The closed air cooling line for a rolling mill according to claim 1, characterized in that: The front and rear ends of the air cooling mechanism (3) are both provided with a material port (5), the upper end of the interior of the material port (5) is installed with an electric push rod (8), and the movable end of the electric push rod (8) is installed with an adjustment plate (6).

7. The closed air cooling line for a rolling mill according to claim 1, characterized in that: The negative pressure fans (11) inside the first air cooling chamber (10) are distributed in a rectangular array.

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