Oxygen burning splash-proof device for upper nozzle of continuous casting tundish

Abstract

The utility model discloses an oxygen burning splash-proof device for an upper nozzle of a continuous casting tundish, which belongs to the field of continuous casting process in ferrous metallurgical industry and comprises a protective cover sleeved at the bottom of the upper nozzle, and the top surface of the protective cover is provided with an accommodating opening which is used for wrapping the bottom of the upper nozzle; a conical spray head is rotationally arranged in the protective cover, an oxygen conveying pipe is arranged on the bottom surface of the conical spray head, and the oxygen conveying pipe extends out of the bottom of the protective cover and is connected with an oxygen supply device; the oxygen conveying pipe is fixedly connected with a rotating handle, and the rotating handle is moved to enable the oxygen conveying pipe to drive the conical spray head to rotate so as to change the oxygen burning part of the conical spray head to the water feeding opening; according to the device, combustion of the conical spray head is more sufficient, the main spray nozzle in the middle of the conical spray head is large in oxygen pressure and violent in combustion, the purpose of rapidly treating solidified molten steel is achieved, the auxiliary spray nozzles on the side face of the conical spray head achieve the purpose of treating the solidified molten steel around an upper water opening, and the oxygen combustion treatment area is effectively increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting process in the iron and steel metallurgical industry, and particularly relates to an oxygen burning splash-proof device at the water inlet of a continuous casting tundish. Background Art

[0002] In the field of iron and steel metallurgy, continuous casting is a process in which molten steel is converted from liquid to solid. For continuous casting, when floccules appear in the lower nozzle and affect casting, the lower nozzle must be replaced. At this time, solidified molten steel will accumulate inside the upper nozzle, and the solidified molten steel inside the upper nozzle needs to be treated. The traditional oxygen-burning tube heats the solidified molten steel inside the nozzle unevenly, resulting in incomplete treatment of the solidified molten steel. In addition, the burned molten steel is easy to splash everywhere, causing danger to the operator. Utility Model Content

[0003] Aiming at the problems existing in the prior art, the utility model provides an oxygen-burning splash-proof device for the upper water inlet of a continuous casting tundish.

[0004] The utility model is achieved as follows: an oxygen-splashing prevention device for an upper water inlet of a continuous casting tundish comprises a protective cover sleeved on the bottom of the upper water inlet, the top surface of the protective cover being arranged as a receiving opening, the receiving opening being used to wrap the bottom of the upper water inlet; a conical nozzle is rotatably arranged in the protective cover, an oxygen supply pipe is arranged on the bottom surface of the conical nozzle, the oxygen supply pipe extends from the bottom of the protective cover and is connected to an oxygen supply device; a rotating handle is fixedly connected to the oxygen supply pipe, and the rotating handle is moved to cause the oxygen supply pipe to drive the conical nozzle to rotate, so as to change the oxygen-burning position of the conical nozzle relative to the upper water inlet.

[0005] Furthermore, the top of the conical nozzle is arranged as a main nozzle, and the side wall of the conical nozzle is arranged with a plurality of auxiliary nozzles, and the auxiliary nozzles make the upper water inlet be heated more evenly.

[0006] Furthermore, the bottom surface of the protective cover is arranged as a variable diameter structure, an annular groove is formed at the variable diameter structure, and a clamping caliper is arranged on the outside of the annular groove; when oxygen is burned on the water inlet, the clamping caliper is clamped in the annular groove to sleeve the device on the bottom of the water inlet.

[0007] Furthermore, a molten steel collecting tank is detachably provided on the bottom surface of the annular groove, and the molten steel collecting tank collects the condensed molten steel melted by oxygen burning in the water inlet.

[0008] Furthermore, the bottom surface of the molten steel collecting tank is set as a concave structure, a through hole is set in the middle of the concave structure, the oxygen supply pipe extends through the through hole and is set in the protective cover and connected to the conical nozzle.

[0009] Furthermore, a sealing ring is arranged in the through hole, and the sealing ring prevents the molten steel from flowing out along the through hole.

[0010] Furthermore, a wear-resistant ring is arranged on the outer side of the annular groove.

[0011] The utility model has the following advantages and technical effects: the combustion of the conical nozzle is more complete, the main nozzle in the middle of the conical nozzle has a large oxygen pressure and burns violently, so as to achieve the purpose of quickly treating the solidified molten steel, and the auxiliary nozzle on the side of the conical nozzle serves the purpose of treating the solidified molten steel around the upper water inlet, and the oxygen treatment area is large. The conical nozzle is rotated by rotating the handle, so that the upper water inlet is heated more evenly during the rotation combustion, and the solidified molten steel inside is left with no dead corners, and the treatment is more thorough. The molten steel collection plate collects the burned molten steel to prevent the burned molten steel from splashing and causing burns to personnel, thus playing a safety protection role. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram provided by an embodiment of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of the clamping caliper provided in an embodiment of the utility model.

[0014] In the figure: 1. conical nozzle; 2. annular groove; 3. molten steel collecting tank; 4. rotating handle; 5. clamping caliper; 6. water inlet; 7. protective cover; 8. auxiliary nozzle; 9. oxygen supply pipe; 10. main nozzle; 11. sealing ring; 12. receiving port; 13. wear-resistant ring. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0016] See also Figure 1 , Figure 2 , an oxygen-burning splash-proof device for a continuous casting tundish water inlet, comprising a protective cover 7 sleeved on the bottom of the water inlet 6, the top surface of the protective cover 7 being arranged as a receiving opening 12, the receiving opening 12 being used to wrap the bottom of the water inlet 6; the bottom surface of the protective cover 7 being arranged as a variable diameter structure, an annular groove 2 being formed at the variable diameter structure, a wear-resistant ring 13 being sleeved on the outer side of the annular groove 2, the wear-resistant ring 13 increasing the wear resistance of the annular groove 2; a molten steel collecting tank 3 being threadedly connected to the bottom of the annular groove 2, the molten steel collecting tank 3 collecting the condensed molten steel in the water inlet 6 melted by oxygen burning, after the molten steel is fully collected, the molten steel collecting tank 3 is unscrewed to transfer the collected molten steel.

[0017] The bottom surface of the molten steel collecting tank 3 is arranged as a concave structure, a through hole is arranged in the middle of the concave structure, and a sealing ring 11 is arranged in the through hole.

[0018] A conical nozzle 1 is rotatably arranged in the protective cover 7 , the top of the conical nozzle 1 is arranged as a main nozzle 10 , and a plurality of auxiliary nozzles 8 are arranged on the side wall of the conical nozzle 1 , the auxiliary nozzles 8 increase the oxygen burning area of ​​the upper water inlet 6 and avoid oxygen burning residue on the upper water inlet 6 .

[0019] The bottom surface of the conical nozzle 1 is connected to the oxygen supply pipe 9, and the oxygen supply pipe 9 extends from the through hole and is connected to the oxygen supply device; the oxygen supply pipe 9 cooperates with the sealing ring 11 on the through hole to prevent the molten steel from flowing out along the through hole; when the upper water inlet 6 is burned with oxygen, the oxygen supply device is turned on, and oxygen overflows from the main nozzle 10 and the auxiliary nozzle 8, and starts to burn when it meets the high-temperature upper water inlet 6, and the upper water inlet 6 is burned with oxygen.

[0020] The oxygen supply pipe 9 is fixedly connected with a rotating handle 4. The rotating handle 4 is moved to make the oxygen supply pipe 9 drive the conical nozzle 1 to rotate, so as to change the oxygen burning position of the auxiliary nozzle 8 on the upper water inlet 6, and further make the upper water inlet 6 heated more evenly.

[0021] A clamping caliper 5 is arranged outside the annular groove 2 ; when oxygen is burned on the water inlet 6 , the clamping caliper 5 clamps the annular groove 2 to sleeve the device on the bottom of the water inlet 6 .

[0022] When the water inlet 6 needs to burn oxygen, the annular groove 2 is clamped with the clamping caliper 5, and the device is put on the bottom of the water inlet 6. The clamping caliper 5 is held to maintain the position of the device until the oxygen burning is completed, and then the device is removed by the clamping caliper 5; during the oxygen burning process, the rotating handle 4 is turned at a uniform speed to change the oxygen burning position of the auxiliary nozzle 8 relative to the water inlet 6, so that the water inlet 6 is heated more evenly.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous casting tundish upper water inlet oxygen splash prevention device, comprising a protective cover (7) sleeved on the bottom of the upper water inlet (6), characterized in that: The top surface of the protective cover (7) is provided with a receiving opening (12), and the receiving opening (12) is used to wrap the bottom of the upper water inlet (6); a conical nozzle (1) is rotatably provided in the protective cover (7), and an oxygen supply pipe (9) is provided on the bottom surface of the conical nozzle (1), and the oxygen supply pipe (9) extends from the bottom of the protective cover (7) and is connected to the oxygen supply device; a rotating handle (4) is fixedly connected to the oxygen supply pipe (9), and the rotating handle (4) is moved to make the oxygen supply pipe (9) drive the conical nozzle (1) to rotate, so as to change the oxygen burning position of the conical nozzle (1) relative to the upper water inlet (6).

2. The oxygen burning splash prevention device for the upper nozzle of the continuous casting tundish according to claim 1 is characterized by: The top of the conical nozzle (1) is provided with a main nozzle (10), and the side wall of the conical nozzle (1) is provided with a plurality of auxiliary nozzles (8), wherein the auxiliary nozzles (8) enable the upper water inlet (6) to be heated more evenly.

3. The oxygen burning splash prevention device for the upper nozzle of the continuous casting tundish according to claim 1 is characterized by: The bottom surface of the protective cover (7) is provided with a variable diameter structure, an annular groove (2) is formed at the variable diameter structure, and a clamping caliper (5) is provided outside the annular groove (2); when oxygen is burned at the water inlet (6), the clamping caliper (5) is clamped in the annular groove (2), and the device is sleeved on the bottom of the water inlet (6).

4. The oxygen burning splash prevention device for the upper nozzle of the continuous casting tundish according to claim 3 is characterized by: The bottom surface of the annular clamping groove (2) is detachably provided with a molten steel collecting groove (3), and the molten steel collecting groove (3) collects the condensed molten steel melted by oxygen burning in the upper water inlet (6).

5. The oxygen burning splash prevention device for the upper nozzle of the continuous casting tundish according to claim 4 is characterized in that: The bottom surface of the molten steel collecting tank (3) is arranged as a concave structure, a through hole is arranged in the middle of the concave structure, and the oxygen supply pipe (9) extends through the through hole and is arranged in the protective cover (7) and is connected to the conical nozzle (1).

6. The oxygen burning splash prevention device for the upper nozzle of the continuous casting tundish according to claim 5 is characterized by: A sealing ring (11) is arranged in the through hole, and the sealing ring (11) prevents molten steel from flowing out along the through hole.

7. The oxygen burning splash prevention device for the upper nozzle of the continuous casting tundish according to claim 3 is characterized by: A wear-resistant ring (13) is arranged on the outside of the annular groove (2).

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