A torsion-resistant metal tube for a converter oxygen lance

Abstract

The utility model discloses a kind of anti-torsion metal pipes for converter oxygen lance, applied in converter oxygen lance technical field, including connecting end, the one end of the connecting end is welded with outer metal pipe.The inside of the connecting end and outer metal pipe is perforated and welded with oxygen lance pipe.Through the sliding cylinder of the one end of far away from connecting end is rotatably connected on the surface of outer metal pipe, so that even pipeline is rigidly connected with converter oxygen lance.When the oxygen recoil force and a series of work influence caused by converter oxygen lance are produced torsion, connecting end and outer metal pipe are not driven to produce torsion synchronously, improve the service life of pipeline.Through the sliding connection of two sliding cylinders on the surface of outer metal pipe, when two sliding cylinders are respectively disassembled between connecting end and converter oxygen lance, sliding cylinder and metal hose can be directly slid off from the surface of outer metal pipe, conveniently disassembled and replaced for metal hose deformed by long-term torsion, improve practicability.

Description

Technical Field

[0001] This utility model belongs to the technical field of converter oxygen lance, and specifically relates to an anti-torsion metal tube for converter oxygen lance. Background Technology

[0002] The oxygen lance in a converter is the main equipment used in the converter steelmaking process to force high-purity, high-pressure oxygen into the molten pool (hot iron) inside the furnace. It is the heart and key equipment of the converter steelmaking process.

[0003] Currently, Chinese utility model patent CN222411659U discloses a high-performance oxygen lance for converters. The anti-torsion metal tube of the converter oxygen lance mainly refers to the components in its multi-layer concentric sleeve structure. The inner layer is mainly used to deliver high-pressure oxygen to the converter oxygen lance, while the outer layer is cooled by flowing cooling water. Because the converter oxygen lance needs to extend above the high-temperature molten pool during operation, it is subjected to the back pressure of oxygen, the weight of the equipment, and the impact of tilting, leading to torsion. Existing anti-torsion tubes typically use high-strength alloy steel (such as chromium-molybdenum steel) or special copper alloys to ensure resistance to torsional deformation under high temperature and pressure. However, since the metal tube is rigidly connected to the converter oxygen lance, when the converter oxygen lance twists, it also simultaneously causes the metal tube to twist, thereby reducing the connection stability of the anti-torsion metal tube and shortening its service life. Utility Model Content

[0004] The purpose of this invention is to provide an anti-torsion metal tube for a converter oxygen lance. Its advantage is that when the converter oxygen lance is subjected to a series of working influences such as oxygen backlash and torsion, it will not cause the metal tube to torsion synchronously, thereby improving the service life of the pipe.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a torsion-resistant metal tube for a converter oxygen lance, comprising a connecting end, an outer metal tube welded to one end of the connecting end, an oxygen lance tube welded through the connecting end and the outer metal tube, an inlet water tank and a return water tank respectively opened inside the outer metal tube, an inner spacer tube welded to the connecting end on the outer surface of the oxygen lance tube, the inlet water tank and the return water tank being separated by the inner spacer tube, and the ends of the inlet water tank and the return water tank away from the connecting end being interconnected.

[0006] The above technical solution employs a sliding cylinder at the end furthest from the connecting end, which rotates on the surface of the outer metal tube, thus achieving a rigid connection between the pipeline and the converter oxygen lance. When the converter oxygen lance is subjected to oxygen backflow and other operational influences causing torsion, it will not cause synchronous torsion of the connecting end and the outer metal tube, extending the pipeline's service life. By using two sliding cylinders slidably connected on the surface of the outer metal tube, when the two cylinders are disassembled from the connecting end and the converter oxygen lance, the sliding cylinders and the metal hose can be directly slid off the surface of the outer metal tube. This facilitates the disassembly and replacement of the metal hose that has deformed due to long-term torsion, improving practicality.

[0007] The present invention is further configured such that sliding cylinders are slidably sleeved at both ends of the surface of the outer metal tube, and a flexible metal tube sleeved on the surface of the outer metal tube is welded between the two sliding cylinders.

[0008] By adopting the above technical solution, the sliding cylinder and the metal hose can be directly slid out from the surface of the outer metal tube, which facilitates the disassembly and replacement of the metal hose that has been deformed due to long-term torsion, thus improving its practicality.

[0009] The present invention is further configured such that the top and bottom of the connecting end are respectively welded with an inlet pipe communicating with the inside of the inlet water tank and an outlet pipe communicating with the inside of the return water tank.

[0010] The above technical solution is adopted: cooling water enters the interior of the inlet water tank through the inlet pipe, then flows into the interior of the return water tank and is discharged through the outlet pipe, so that the cooling water can circulate between the outer metal pipe and the surface of the oxygen gun pipe to meet the heat dissipation requirements.

[0011] The present invention is further provided that a first connecting flange is welded to the top of the water inlet, the bottom of the water outlet, and the end of the oxygen gun tube away from the connecting end.

[0012] The above technical solution facilitates precise connection with cooling water and oxygen pipelines, thereby improving sealing performance.

[0013] The present invention is further configured such that a sealing ring is snapped onto the end of the outer metal tube away from the connecting end.

[0014] The above technical solution improves the sealing between the outer metal tube and one end of the converter oxygen lance, so that when the converter oxygen lance is twisted at one end of the outer metal tube, oxygen will not leak out.

[0015] The present invention is further provided that a second connecting flange is welded to the ends of the two sliding cylinders that are far apart from each other and the end of the connecting end that is close to the outer metal tube.

[0016] The above technical solution involves bolting the two sliding cylinders to the connecting end and the converter oxygen lance via the second connecting flange, thereby improving connection stability.

[0017] The present invention is further provided that the interior of both the inlet water tank and the return water tank is provided with reinforcing rods welded to the outer metal pipe, the oxygen lance pipe and the inner spacer pipe.

[0018] The above technical solution is used to support and reinforce the interior of the inlet and return water tanks, thereby improving stability.

[0019] In summary, this utility model has the following beneficial effects: 1. A sliding cylinder at the end furthest from the connecting end rotates on the surface of the outer metal tube, thus rigidly connecting the pipe to the converter oxygen lance. When the converter oxygen lance is subjected to oxygen backlash and other operational influences that cause torsion, it will not cause the connecting end and the outer metal tube to torsion synchronously, thereby improving the service life of the pipe. 2. Two sliding cylinders are slidably connected to the surface of the outer metal tube. This allows the sliding cylinders and metal hose to be directly detached from the surface of the outer metal tube after the two cylinders are removed from the connection end and the converter oxygen lance. This facilitates the disassembly and replacement of the metal hose that has deformed due to long-term torsion, improving practicality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model; Figure 3 This is a partial structural cross-sectional view of the present invention; Figure 4 This is a cross-sectional view of the connection end structure of this utility model.

[0021] Reference numerals: 1. Connecting end; 2. Outer metal tube; 3. Oxygen lance tube; 4. Inlet water tank; 5. Return water tank; 6. Inner spacer tube; 7. Sliding cylinder; 8. Metal flexible hose; 9. Inlet water port; 10. Outlet water port; 11. First connecting flange; 12. Second connecting flange; 13. Sealing ring; 14. Reinforcing rod. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1: refer to Figure 1 , Figure 2 , Figure 3 , Figure 4An anti-torsion metal tube for a converter oxygen lance includes a connecting end 1, with an outer metal tube 2 welded to one end of the connecting end 1. An oxygen lance tube 3 is welded through the connecting end 1 and the outer metal tube 2. The outer metal tube 2 has an inlet water tank 4 and a return water tank 5 respectively. An inner spacer tube 6, welded to the connecting end 1, is fitted onto the outer surface of the oxygen lance tube 3. The inner spacer tube 6 separates the inlet water tank 4 and the return water tank 5 between the connecting end 1 and the outer metal tube 2. The ends of the inlet water tank 4 and the return water tank 5 furthest from the connecting end 1 are interconnected. A sliding cylinder 7 at the end furthest from the connecting end 1 rotates on the surface of the outer metal tube 2, thus rigidly connecting the pipe to the converter oxygen lance. When the converter oxygen lance is subjected to a series of working effects such as oxygen backlash, causing torsion, the connecting end 1 and the outer metal tube 2 will not be torsion synchronously, improving the service life of the pipe. Two sliding cylinders 7 are slidably connected to the surface of the outer metal tube 2. This allows the sliding cylinders 7 and the metal hose 8 to be directly slid off the surface of the outer metal tube 2 after the two sliding cylinders 7 are disassembled from the connection end 1 and the converter oxygen lance, facilitating the disassembly and replacement of the metal hose 8 that has deformed due to long-term torsion, thus improving practicality.

[0024] refer to Figure 1 , Figure 2 , Figure 3 Both ends of the outer metal tube 2 are slidably fitted with sliding cylinders 7, and a flexible metal tube 8 is welded between the two sliding cylinders 7 and fitted onto the surface of the outer metal tube 2. The sliding cylinders 7 and the flexible metal tube 8 can be directly slid out from the surface of the outer metal tube 2, which facilitates the disassembly and replacement of the flexible metal tube 8 that has been deformed due to long-term torsion, thus improving its practicality.

[0025] refer to Figure 1 , Figure 2 The top and bottom of the connecting end 1 are respectively welded with an inlet pipe 9 that communicates with the inside of the inlet water tank 4 and an outlet pipe 10 that communicates with the inside of the return water tank 5. Cooling water enters the inside of the inlet water tank 4 through the inlet pipe 9, then flows into the inside of the return water tank 5 and is discharged through the outlet pipe 10, so that the cooling water can circulate between the outer metal pipe 2 and the oxygen gun pipe 3 to meet the heat dissipation requirements.

[0026] refer to Figure 1 , Figure 2 , Figure 4 A first connecting flange 11 is welded to the top of the water inlet 9, the bottom of the water outlet 10, and the end of the oxygen lance tube 3 furthest from the connecting end 1. This facilitates tight connection with cooling water and oxygen pipelines, thereby improving sealing.

[0027] refer to Figure 1 , Figure 2A sealing ring 13 is snapped onto the end of the outer metal tube 2 away from the connecting end 1. This improves the sealing between the outer metal tube 2 and the converter oxygen lance, so that when the converter oxygen lance is twisted at one end of the outer metal tube 2, oxygen will not leak out.

[0028] refer to Figure 2 , Figure 3 A second connecting flange 12 is welded to the ends of the two sliding cylinders 7 that are far apart from each other, and to the end of the connecting end 1 that is close to the outer metal tube 2. This allows the two sliding cylinders 7 to be bolted to the connecting end 1 and the converter oxygen lance respectively through the second connecting flange 12, thereby improving the connection stability.

[0029] refer to Figure 4 Both the inlet water tank 4 and the return water tank 5 are equipped with reinforcing rods 14 welded to the outer metal pipe 2, the oxygen lance pipe 3, and the inner spacer pipe 6. These rods are used to support and reinforce the interior of the inlet water tank 4 and the return water tank 5, thereby improving stability.

[0030] Brief description of the usage process: The end of the sliding cylinder 7 furthest from the connecting end 1 is fixedly connected to the oxygen lance of the converter. When high-pressure oxygen enters through the oxygen lance tube 3, it can enter the interior of the converter oxygen lance from the other end. At the same time, cooling water enters the interior of the water inlet tank 4 through the water inlet 9. Since the inner partition tube 6 separates the water inlet tank 4 and the return water tank 5, and the water inlet tank 4 and the return water tank 5 are only connected to each other at the end furthest from the connecting end 1, the cooling water can flow through the water inlet tank 4 to the end furthest from the connecting end 1 and then enter the interior of the return water tank 5. It is then discharged back through the water outlet 10 connected to the return water tank 5, so that the cooling water circulates inside the outer metal tube 2 to meet the heat dissipation requirements.

[0031] Meanwhile, since the two sliding cylinders 7 are bolted to the connecting end 1 and the converter oxygen lance respectively, when the converter oxygen lance is subjected to a series of working effects such as oxygen backlash and causes torsion, it will drive the sliding cylinder 7 at the end away from the connecting end 1 to rotate on the surface of the outer metal pipe 2, and at the same time drive the metal hose 8 to deform. This will prevent the sliding cylinder 7 bolted to the connecting end 1 from rotating, thus preventing the connecting end 1 and the outer metal pipe 2 from torsion synchronously due to the torsion of the converter oxygen lance, thereby improving the service life of the pipeline.

[0032] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0033] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A torsion-resistant metal tube for a converter oxygen lance, comprising a connecting end (1), characterized in that: One end of the connecting end (1) is welded with an outer metal tube (2). An oxygen gun tube (3) is welded through the connecting end (1) and the outer metal tube (2). An inlet water tank (4) and a return water tank (5) are respectively opened inside the outer metal tube (2). An inner spacer tube (6) welded to the connecting end (1) is sleeved on the outer surface of the oxygen gun tube (3). The inlet water tank (4) and the return water tank (5) are separated by the inner spacer tube (6). The ends of the inlet water tank (4) and the return water tank (5) that are away from the connecting end (1) are connected to each other.

2. The anti-torsion metal tube for a converter oxygen lance according to claim 1, characterized in that: Both ends of the outer metal tube (2) are slidably sleeved with sliding cylinders (7), and a metal flexible tube (8) sleeved on the surface of the outer metal tube (2) is welded between the two sliding cylinders (7).

3. The anti-torsion metal tube for a converter oxygen lance according to claim 1, characterized in that: The top and bottom of the connecting end (1) are respectively welded with an inlet pipe (9) that communicates with the inside of the inlet water tank (4) and an outlet pipe (10) that communicates with the inside of the return water tank (5).

4. The anti-torsion metal tube for a converter oxygen lance according to claim 3, characterized in that: The top of the water inlet (9), the bottom of the water outlet (10), and the end of the oxygen gun tube (3) away from the connecting end (1) are all welded with a first connecting flange (11).

5. The anti-torsion metal tube for a converter oxygen lance according to claim 1, characterized in that: The outer metal tube (2) is fitted with a sealing ring (13) at the end away from the connecting end (1).

6. The anti-torsion metal tube for a converter oxygen lance according to claim 2, characterized in that: A second connecting flange (12) is welded to the ends of the two sliding cylinders (7) that are far apart from each other and to the end of the connecting end (1) that is close to the outer metal tube (2).

7. The anti-torsion metal tube for a converter oxygen lance according to claim 1, characterized in that: The inlet water tank (4) and the return water tank (5) are both equipped with reinforcing rods (14) welded to the outer metal pipe (2), the oxygen lance pipe (3) and the inner spacer pipe (6).

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