Oxygen lance nozzle positioning device

Abstract

The utility model relates to an oxygen lance nozzle positioning device, and belongs to the technical field of converter steelmaking in the metallurgical industry. The utility model relates to a molten zinc sampling mold, and belongs to the technical field of metallurgical cold rolling detection. Comprising a fastening device and a positioning device, the fastening device comprises a fastening plate I (1), a fastening plate II (2), a butterfly nut (3), a bolt (5) and a pin shaft (6), the pin shaft (6) is fixed through a through hole in the side face of a wing plate (13), the end of the pin shaft (6) is fastened and fixed through the butterfly nut (3), the fastening plate I (1) and the fastening plate II (2) are assembled and fixed, and the positioning device comprises a jackscrew (7), a nut (8) and a supporting block (10). And the jackscrews (7) are assembled on the fastening plate I (1) and the fastening plate II (2). The device is simple in structure, convenient to disassemble and assemble and capable of achieving accurate centering when the oxygen lance nozzle and the lance body are assembled, and installation accuracy is improved.

Description

Technical Field

[0001] The utility model relates to a positioning device for an oxygen lance nozzle, belonging to the technical field of converter steelmaking in the metallurgical industry. Background Art

[0002] The oxygen lance is an important device in the converter steelmaking production process, mainly composed of a nozzle, a lance body and a lance tail. Due to the harsh working environment, the nozzle is significantly eroded or even damaged during use. To ensure the smooth progress of converter steelmaking, the nozzle needs to be replaced regularly according to the erosion situation. Generally, the vertical maintenance method is adopted. Because the structure of the oxygen lance is in the form of a sleeve, transporting oxygen, cooling water inlet and cooling water return, a rubber ring needs to be installed at the nozzle position for sealing, which poses higher requirements for the centering and positioning of the oxygen lance nozzle. The existing centering methods generally rely on the experience of maintenance workers to complete centering by measuring the offset amount between the lance body and the nozzle. Due to the uneven technical levels of workers, this results in deviations in centering quality; some steel enterprises use special centering equipment, but generally it is relatively bulky, and it is troublesome to move, disassemble and assemble, greatly increasing the time and workload of replacing the nozzle. Therefore, it is necessary to design a positioning device for an oxygen lance nozzle to achieve rapid positioning of the oxygen lance nozzle, with high centering accuracy, convenient disassembly and assembly. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a positioning device for an oxygen lance nozzle, which can accurately and efficiently complete the centering and positioning of the oxygen lance body and the nozzle, and is convenient for disassembly and assembly, small and light, easy to store, improving the working efficiency and installation quality of the oxygen lance nozzle operation.

[0004] The technical solution of the utility model is: a positioning device for an oxygen lance nozzle, including a fastening device and a positioning device. The fastening device includes a fastening plate I, a fastening plate II, a wing nut, a gasket I, a bolt and a pin shaft. The fastening plate I and the fastening plate II are steel structures with the same shape, including an arc section and plate-shaped wing plates arranged on both sides. Through holes are arranged on the front and side surfaces of the wing plates of the fastening plate II. The pin shaft passes through the through holes on the front surfaces of the wing plates of the fastening plate I and the fastening plate II, and the pin shaft is fixed through the through holes on the side surfaces of the wing plates. The end of the pin shaft is fixed by the fastening of the wing nut, and the fastening plate I and the fastening plate II are assembled and fixed. The positioning device includes a set screw, a nut, a gasket II and a support block. Threaded holes are arranged on the side surfaces of the vertical arc surfaces of the fastening plate I and the fastening plate II, and the set screw is assembled in a matching manner with the threaded holes. The support block is a metal block provided with a through hole, and the support block and the gasket II are assembled in a matching manner on the set screw.

[0005] For the positioning device for an oxygen lance nozzle as described above, there are 2 - 5 sets of the positioning devices, which are evenly distributed and assembled on the arc surface formed by the fastening plate I and the fastening plate II.

[0006] The oxygen lance nozzle positioning device as described above, the arc lengths of the fastening plate I and the fastening plate II are 80 - 90% of the semi-circular arc length.

[0007] The oxygen lance nozzle positioning device as described above, the arc surface widths of the fastening plate I and the fastening plate II are 80 - 120 mm.

[0008] The beneficial effects of the present utility model are: The device of the present utility model has a simple structure, is small and light, is convenient for disassembly and assembly, has a low manufacturing cost, can achieve precise centering during the assembly of the oxygen lance nozzle and the lance body, improves the installation accuracy, and avoids problems such as water leakage of the oxygen lance nozzle caused by the non-concentricity of the oxygen lance nozzle and the lance body, and has significant economic benefits. Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the device of the present utility model;

[0010] Figure 2 It is a schematic diagram of the use state of the device of the present utility model;

[0011] Markings in the figure: fastening plate I 1, fastening plate II 2, wing nut 3, washer I 4, bolt 5, pin shaft 6, setscrew 7, nut 8, washer II 9, support block 10, oxygen lance body 11, oxygen lance nozzle 12, wing plate 13. Detailed Description of the Invention

[0012] The following further illustrates the present utility model through examples in conjunction with the attached drawings.

[0013] Referring to the attached drawings, an oxygen lance nozzle positioning device includes a fastening device and a positioning device. The fastening device includes a fastening plate I 1, a fastening plate II 2, a wing nut 3, a washer I 4, and a bolt 5. The fastening plate I 1 and the fastening plate II 2 are steel structures with the same shape, including an arc section and plate-shaped wing plates 13 provided on both sides. Through holes are provided on the front and side surfaces of the wing plate 13 of the fastening plate II 2. The pin shaft 6 passes through the through holes on the front surface of the wing plates 13 of the fastening plate I 1 and the fastening plate II 2, and the pin shaft 6 is fixed through the through holes on the side surface of the wing plate 13. The end of the pin shaft 6 is fixed by the fastening of the wing nut 3, and the fastening plate I 1 and the fastening plate II 2 are assembled and fixed. The positioning device includes a setscrew 7, a nut 8, a washer II 9, and a support block 10. Threaded holes are provided on the side surfaces perpendicular to the arc surfaces of the fastening plate I 1 and the fastening plate II 2, and the setscrew 7 is assembled in matching with the threaded holes. The support block 10 is a metal block provided with a through hole, and the support block 10 and the washer II 9 are assembled in matching on the setscrew 7. There are 3 sets of the positioning devices, which are evenly distributed and assembled on the arc surface formed by the fastening plate I 1 and the fastening plate II 2. The arc lengths of the fastening plate I 1 and the fastening plate II 2 are 85% of the semi-circular arc length. The arc surface widths of the fastening plate I 1 and the fastening plate II 2 are 90 mm.

[0014] The inner diameter after the assembly of the fastening plate I 1 and the fastening plate II 2 is the same as the outer diameter of the oxygen lance body 11, and the oxygen lance body 11 is locked by the turnbuckle bolts 5 on the two wings of the fastening plate; the pin shafts 6 installed on the two wing plates 13 of the fastening plate II 2 penetrate into the other end of the turnbuckle bolt 5. This structure is convenient for disassembly and assembly, and the turnbuckle bolt 5 and the fastening plate are integrated, so it is not easy to be lost; the positioning set screws 7 are evenly assembled on the arc surface formed by the fastening plate I 1 and the fastening plate II 2 to finely adjust the oxygen lance body 11 and the oxygen lance nozzle 12 so as to achieve the purpose of accurate centering and positioning; the lock nuts 8 are installed on the positioning set screws 7. After the centering and positioning are completed, the lock nuts 8 are tightened to prevent the oxygen lance body 11 and the oxygen lance nozzle 12 from being misaligned.

[0015] The usage method of the utility model is as follows:

[0016] After cleaning the adhering steel and slag on the oxygen lance body, the oxygen lance is transported to the maintenance gun rack and fixed firmly. The old oxygen lance nozzle is cut off by gas welding, and the bottom of the oxygen lance body 11 is trimmed with a angle grinder and the groove is polished. The oxygen lance nozzle 12 is moved to the lower part of the oxygen lance body 11 and roughly centered. Next, the positioning device is installed. The fastening plate I 1 and the fastening plate II 2 are clamped on the bottom of the oxygen lance body 11. The turnbuckle bolt 5 on the fastening plate II 2 is rotated into the fastening plate I 1, and the gasket I 4 and the wing nut 3 are installed and locked. The three positioning set screws 7 are adjusted for fine adjustment to make the oxygen lance nozzle 12 and the oxygen lance body 11 complete accurate centering. After the centering is completed, the lock nut 8 is tightened to fix the positioning set screw 7. The oxygen lance nozzle 12 and the oxygen lance body 11 are fixed by spot welding. Subsequently, the wing nut 3 and the turnbuckle bolt 5 are loosened, and the fastening plate I 1 and the fastening plate II 2 are removed from the oxygen lance body 11. Then the gap is filled and the cover surface is welded, and the weld seam is trimmed with a angle grinder to make the weld surface smooth and neat. Thus, the replacement of the oxygen lance nozzle is completed.

[0017] The device of the utility model has a simple structure, is small, light, convenient for disassembly and assembly, and has a low manufacturing cost. It can achieve accurate centering during the assembly of the oxygen lance nozzle and the lance body, improve the installation accuracy, avoid problems such as water leakage of the oxygen lance nozzle caused by the non-concentricity of the oxygen lance nozzle and the lance body, and has remarkable economic benefits.

Claims

1. An oxygen lance nozzle positioning device, characterized in that The invention comprises a fastening device and a positioning device, wherein the fastening device comprises a fastening plate I (1), a fastening plate II (2), a butterfly nut (3), a bolt (5), and a pin (6); the fastening plate I (1) and the fastening plate II (2) are steel structures of the same shape, comprising an arc segment and plate-shaped wing plates (13) arranged on both sides; the wing plate (13) of the fastening plate II (2) is provided with through holes on the front and side surfaces; the pin (6) passes through the through holes on the front of the wing plates (13) on the fastening plates I (1) and the fastening plates II (2); the pin (6) passes through the side holes of the wing plates (13) The pin shaft (6) is fixed by a through hole on the surface, and the end of the pin shaft (6) is fixed by fastening a butterfly nut (3), and the fastening plate I (1) and the fastening plate II (2) are assembled and fixed. The positioning device comprises a top screw (7), a nut (8), a gasket II (9), and a support block (10). The side surfaces of the fastening plate I (1) and the fastening plate II (2) vertical arc surfaces are provided with threaded holes, and the top screw (7) is matched and assembled with the threaded holes. The support block (10) is a metal block provided with a through hole, and the support block (10) and the gasket II (9) are matched and assembled on the top screw (7).

2. The oxygen lance nozzle positioning device according to claim 1, characterized in that There are 2 to 5 sets of positioning devices, which are evenly distributed and assembled on the arc surface formed by the fastening plate I (1) and the fastening plate II (2).

3. The oxygen lance nozzle positioning device according to claim 1, characterized in that The arc length of the fastening plate I (1) and the fastening plate II (2) is 80-90% of the length of the semicircular arc.

4. The oxygen lance nozzle positioning device according to claim 1, characterized in that The arc width of the fastening plate I (1) and the fastening plate II (2) is 80-120 mm.

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