A baking and preheating device for a continuous casting machine

Abstract

The utility model discloses a kind of baking preheating device of continuous casting machine, it is related to mechanical equipment technical field, including seat plate, the upper end one side of seat plate is equipped with stand, the upper end of stand is connected with rotary frame, burner is installed on rotary frame, the below of burner is provided with direct injection type baker, pipeline assembly is connected with the intercommunication between burner and direct injection type baker, pipeline assembly includes the gas straight pipe of being set in burner side.This utility model, the heating direction of the device is changed from top one-way heating to top-bottom bidirectional double-firing type, the structure is changed from bottom air extraction type to direct injection type, and the structure is more compact, easy to operate, the position of nozzle jet can be adjusted arbitrarily, the inner and outer wall of tundish water gap can be baked evenly, the impurities and gas inside water gap are effectively removed, and the labor intensity of worker, gas backflow risk and equipment failure rate are effectively reduced, the production process performance is ensured, the routine maintenance cost is reduced, and effective reference and solution mode are provided for the same type equipment failure and hidden danger.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a baking and preheating device for a continuous casting machine. Background Technology

[0002] The capacity replacement project of the new area of ​​Beiying Steel Plant was completed and put into operation in 2023. The production line is equipped with two 8-strand billet continuous casting machines. Each casting machine includes equipment such as a rotary table, a crystallizer, and a straightening machine. Two tundish preheating stations are set on both sides of the pouring center line, with eight burners above them. Their function is to heat the tundish lining to 1100°C before pouring.

[0003] The online sprue baking device is a key facility of the tundish preheating station. Located below the tundish, its function is to preheat the immersion sprue and bake the sprue simultaneously with the tundish.

[0004] The original preliminary design for the baking method was an exhaust type, where a lower induced draft fan created negative pressure to extract the flame and high-temperature flue gas from the tundish to heat the submerged entry nozzle. During operation, insufficient negative pressure resulted in uneven temperature distribution, unsatisfactory nozzle heating, high energy consumption, low efficiency, and the inability to fully utilize its high-temperature resistance and corrosion resistance. This also led to high gas consumption, resource waste, and serious impacts on process quality and tundish replacement cycles. Therefore, this paper proposes a baking preheating device for continuous casting machines. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a baking and preheating device for a continuous casting machine. The heating direction of this device has been changed from unidirectional top heating to a bidirectional double-heating system, and the structure has been changed from a bottom-extraction type to a direct-injection type. The device is more compact, easier to operate, and allows for arbitrary adjustment of the nozzle spray position. This ensures uniform baking of the inner and outer walls of the tundish nozzle, while effectively removing impurities and gases from inside the nozzle. It also effectively reduces worker labor intensity, the risk of gas backflow, and equipment failure rates, ensuring production process performance and reducing daily maintenance costs. This provides an effective reference and solution for similar equipment failures and potential hazards, overcoming the shortcomings of existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A baking and preheating device for a continuous casting machine includes a base plate, a column is installed on one of the upper sides of the base plate, a rotating frame is connected to the upper end of the column, a burner is installed on the rotating frame, a direct injection baker is arranged below the burner, and a communicating pipe assembly connects the burner and the direct injection baker.

[0008] As a further embodiment of this utility model: the pipeline assembly includes a gas straight pipe disposed on one side of the burner, one end of the gas straight pipe is connected to a first gas valve, and a gas hose is connected to the gas straight pipe through a tee connector, one end of the gas hose being connected to a direct injection oven.

[0009] As a further embodiment of this utility model: the pipeline assembly also includes an air straight pipe connected to the top of the burner, the first connection of the air straight pipe is a first air valve, and an air hose is connected to the air straight pipe through a tee connector, one end of the air hose being connected to the direct injection oven.

[0010] As a further embodiment of this utility model: a second gas valve is provided at the top of the side wall of the direct injection oven, a second air valve is provided at the bottom of the side wall of the direct injection oven, the gas hose is connected to the second gas valve, and the air hose is connected to the second air valve.

[0011] As a further embodiment of this utility model: one end of the first gas valve is connected to a gas supply pipeline, and one end of the first air valve is connected to an air compressor gas transmission pipeline.

[0012] As a further embodiment of this utility model: the rotating frame includes a first U-shaped seat connected to the upper end of the column, a rotating block is rotatably mounted on the first U-shaped seat via a connecting pin, an electric push rod is rotatably connected to the end of the rotating block away from the first U-shaped seat, a second U-shaped seat is provided on the upper side of the seat plate, and the lower end of the electric push rod is rotatably connected to the second U-shaped seat.

[0013] As a further embodiment of this utility model: a support rod is fixed on the outer wall of the rotating block near the first U-shaped seat, and the burner is fixed to the end of the support rod.

[0014] The beneficial effects of this utility model are as follows:

[0015] The heating direction of this device has been changed from top unidirectional heating to top-bottom bidirectional reheating, and the structure has been changed from bottom suction type to direct injection type. The structure is more compact and easy to operate. The nozzle spray position can be adjusted arbitrarily, which can make the inner and outer walls of the intermediate water inlet evenly baked. At the same time, impurities and gases inside the water inlet are effectively removed, which can effectively reduce the labor intensity of workers, the risk of gas backflow and equipment failure rate, ensure production process performance, reduce daily maintenance costs, and provide effective reference and solutions for the failure and hidden dangers of similar equipment. Attached Figure Description

[0016] Figure 1 This is a first-view overall structural schematic diagram of a baking and preheating device for a continuous casting machine proposed in this utility model.

[0017] Figure 2This is a second-view overall structural diagram of a baking and preheating device for a continuous casting machine proposed in this utility model.

[0018] Figure 3 This is a third-view overall structural diagram of a baking and preheating device for a continuous casting machine proposed in this utility model.

[0019] Figure 4 This utility model proposes a baking and preheating device for a continuous casting machine. Figure 2 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Seat plate; 2. Electric push rod; 3. Rotating block; 4. First air valve; 5. Air straight pipe; 6. Gas straight pipe; 7. Burner; 8. Gas hose; 9. Air hose; 10. Direct injection oven; 11. Column; 12. Support rod; 13. Second U-shaped seat; 14. First U-shaped seat; 15. Second air valve; 16. Second gas valve; 17. First gas valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1, referring to Figure 1-4 A baking and preheating device for a continuous casting machine includes a base plate 1, a column 11 installed on one side of the upper end of the base plate 1, a rotating frame connected to the upper end of the column 11, a burner 7 installed on the rotating frame, a direct injection baker 10 arranged below the burner 7, and a communicating pipe assembly connecting the burner 7 and the direct injection baker 10.

[0023] The piping assembly includes a gas straight pipe 6 located on one side of the burner 7. One end of the gas straight pipe 6 is connected to a first gas valve 17. A gas hose 8 is connected to the gas straight pipe 6 via a tee connector. One end of the gas hose 8 is connected to the direct injection oven 10.

[0024] The piping assembly also includes an air straight pipe 5 connected to the top of the burner 7. The first connection of the air straight pipe 5 is a first air valve 4. An air hose 9 is connected to the air straight pipe 5 via a tee connector. One end of the air hose 9 is connected to the direct injection oven 10.

[0025] A second gas valve 16 is provided at the top of the side wall of the direct injection oven 10, and a second air valve 15 is provided at the bottom of the side wall of the direct injection oven 10. The gas hose 8 is connected to the second gas valve 16, and the air hose 9 is connected to the second air valve 15.

[0026] One end of the first gas valve 17 is connected to the gas supply pipeline, and one end of the first air valve 4 is connected to the air compressor gas transmission pipeline.

[0027] After the base plate 1 is fixed in the appropriate installation position, the burner 7 is located above the intermediate liner. The direct injection heater 10 is placed below the water inlet below the intermediate liner. While the burner 7 is burning above the intermediate liner, the direct injection heater 10 is burning below the intermediate liner, so that the inner and outer walls of the water inlet are baked evenly. At the same time, impurities and gases inside the water inlet are effectively removed. The direct injection heater 10 can adjust the nozzle spray position at will, making it easy to operate and flexible to move.

[0028] Example 2 is an optimization based on Example 1, specifically:

[0029] The rotating frame includes a first U-shaped seat 14 connected to the upper end of the column 11. A rotating block 3 is rotatably mounted on the first U-shaped seat 14 via a connecting pin. An electric push rod 2 is rotatably connected to the end of the rotating block 3 away from the first U-shaped seat 14. A second U-shaped seat 13 is provided on the upper side of the seat plate 1. The lower end of the electric push rod 2 is rotatably connected to the second U-shaped seat 13. A support rod 12 is fixed on the rotating block 3 near the outer wall of the first U-shaped seat 14. The burner 7 is fixed to the end of the support rod 12.

[0030] By controlling the extension and retraction of the electric push rod 2, the rotating block 3, the support rod 12 and the burner 7 can be rotated, making it easier to move the burner 7 above the liner or move it away.

[0031] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A baking and preheating device for a continuous casting machine comprising a seating plate (1), characterized in that, A column (11) is installed on one side of the upper end of the seat plate (1). A rotating frame is connected to the upper end of the column (11). A burner (7) is installed on the rotating frame. A direct injection oven (10) is provided below the burner (7). A connecting pipe assembly is connected between the burner (7) and the direct injection oven (10).

2. The baking and preheating device for a continuous casting machine according to claim 1, characterized in that, The pipeline assembly includes a gas straight pipe (6) disposed on one side of the burner (7), one end of the gas straight pipe (6) is connected to a first gas valve (17), and a gas hose (8) is connected to the gas straight pipe (6) through a tee connector, one end of the gas hose (8) is connected to the direct injection oven (10).

3. The baking and preheating device for a continuous casting machine according to claim 2, characterized in that, The piping assembly also includes an air straight pipe (5) connected to the top of the burner (7), the first connection of the air straight pipe (5) is a first air valve (4), and an air hose (9) is connected to the air straight pipe (5) via a tee connector, one end of the air hose (9) being connected to the direct injection oven (10).

4. The baking and preheating device for a continuous casting machine according to claim 3, characterized in that, The direct-injection oven (10) has a second gas valve (16) at the top of its side wall and a second air valve (15) at the bottom of its side wall. The gas hose (8) is connected to the second gas valve (16) and the air hose (9) is connected to the second air valve (15).

5. The baking and preheating device for a continuous casting machine according to claim 4, characterized in that, One end of the first gas valve (17) is connected to the gas supply pipeline, and one end of the first air valve (4) is connected to the air compressor gas pipeline.

6. The baking and preheating device for a continuous casting machine according to claim 1, characterized in that, The rotating frame includes a first U-shaped seat (14) connected to the upper end of the column (11). A rotating block (3) is rotatably mounted on the first U-shaped seat (14) via a connecting pin. An electric push rod (2) is rotatably connected to the end of the rotating block (3) away from the first U-shaped seat (14). A second U-shaped seat (13) is provided on the upper side of the seat plate (1). The lower end of the electric push rod (2) is rotatably connected to the second U-shaped seat (13).

7. The baking and preheating device for a continuous casting machine according to claim 6, characterized in that, A support rod (12) is fixed on the outer wall of the rotating block (3) near the first U-shaped seat (14), and the burner (7) is fixed to the end of the support rod (12).

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