Air cooling device for high-carbon steel sample of LF (ladle furnace)

Abstract

The utility model relates to a high-carbon steel sample air cooling device for an LF refining furnace, and belongs to the technical field of LF refining furnace production equipment in the metallurgical industry. According to the technical scheme, a gas ejector pipe support (2) and a sample containing hopper support (6) are fixed to a refining furnace platform (1), a gas ejector pipe (4) is fixed to the gas ejector pipe support (2) through a buckle (3), and one end of the gas ejector pipe (4) is connected with a spray head (5); the sample containing hopper (7) is rotationally connected to the sample containing hopper support (6), and an opening of the sample containing hopper (7) is arranged opposite to the spray head (5) of the gas ejector pipe (4). And the sample containing hopper (7) is trumpet-shaped, and one end with a larger opening is arranged opposite to the nozzle (5) of the gas ejector pipe (4). The cooling device has the beneficial effects that the cooling effect is good, the defects of cracks and the like of the sample in the cooling process, influence on the alloy component proportion in the smelting process, casting speed fluctuation caused by prolonging the smelting period and the like are avoided, and the qualified rate of the sample and the representativeness of sample components are improved.

Description

Technical Field

[0001] The utility model relates to an air cooling device for a high carbon steel sample of an LF refining furnace, and belongs to the technical field of LF refining furnace production equipment in the metallurgical industry. Background Art

[0002] In the LF refining furnace smelting process, the analysis of molten steel samples is required to be representative, especially for the smelting of medium and high carbon steel, which is hard and brittle due to its high carbon content. Rapid cooling of the sample can easily cause cracks in the sample, making the sample composition unrepresentative, thereby affecting the alloy composition ratio in the smelting process, prolonging the smelting cycle and causing casting machine speed fluctuations. Therefore, it is necessary to design an efficient, convenient and slow-release medium and high carbon steel sample air cooling device. Utility Model Content

[0003] The utility model aims to provide a LF refining furnace high carbon steel sample wind cooling device, which has good cooling effect, avoids the drawbacks such as cracks in the sample during the cooling process, thereby affecting the alloy component ratio in the smelting process, and solves the problems existing in the background technology.

[0004] The technical solution of the utility model is:

[0005] The invention discloses an air cooling device for a high carbon steel sample of an LF refining furnace, comprising a refining furnace platform, an air jet pipe bracket, a buckle, an air jet pipe, a nozzle, a sample bucket bracket and a sample bucket. The air jet pipe bracket and the sample bucket bracket are respectively fixed on the refining furnace platform, the air jet pipe is fixed on the air jet pipe bracket by a buckle, and one end of the air jet pipe is connected to the nozzle; the sample bucket is rotatably connected to the sample bucket bracket, and an opening of the sample bucket is arranged opposite to the nozzle of the air jet pipe.

[0006] The sample holding bucket is trumpet-shaped, with the end with a larger opening arranged opposite to the nozzle of the air jet pipe, and the end with a smaller opening being provided with a mesh screen.

[0007] The sample holding bucket is rotatably connected to the sample holding bucket bracket via a rotating shaft.

[0008] A proximity limit switch is also fixed on the refining furnace platform, and the proximity limit switch is close to the sample hopper.

[0009] The sample hopper is rotated to a horizontal position and approaches a limit switch.

[0010] The jet pipe is arranged horizontally, and the other end of the jet pipe is connected to a compressed air source.

[0011] After the operator takes out the molten steel sample from the furnace with the molten steel sampler, he uses tweezers to clamp the sample and place it in the sample bucket. The air is blown through the metal jet pipe and nozzle to purge the molten steel sample in the sample bucket for slow-release cooling.

[0012] The utility model has the following beneficial effects: good cooling effect, avoiding the drawbacks such as cracks in the sample during the cooling process, affecting the alloy composition ratio in the smelting process, extending the smelting cycle and causing casting machine speed fluctuations, etc., and improving the sample qualification rate and the representativeness of the sample composition. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the utility model;

[0014] In the figure: refining furnace platform 1, jet pipe bracket 2, buckle 3, jet pipe 4, nozzle 5, sample bucket bracket 6, sample bucket 7, proximity limit switch 8, rotating shaft 9. DETAILED DESCRIPTION

[0015] The present invention will be further described below by way of examples with reference to the accompanying drawings.

[0016] Refer to the attached Figure 1 A LF refining furnace high carbon steel sample air cooling device comprises a refining furnace platform 1, an air jet tube bracket 2, a buckle 3, an air jet tube 4, a nozzle 5, a sample bucket bracket 6 and a sample bucket 7. The air jet tube bracket 2 and the sample bucket bracket 6 are respectively fixed on the refining furnace platform 1, the air jet tube 4 is fixed on the air jet tube bracket 2 by the buckle 3, and one end of the air jet tube 4 is connected to the nozzle 5; the sample bucket 7 is rotatably connected to the sample bucket bracket 6, and the opening of the sample bucket 7 is arranged opposite to the nozzle 5 of the air jet tube 4.

[0017] In this embodiment, refer to the attached Figure 1 The sample bucket 7 is trumpet-shaped and is rotatably connected to the sample bucket bracket 6 via a rotating shaft 9. After the sample bucket 7 is rotated to a horizontal position, the end with a larger opening corresponds to the nozzle 5 of the air injection pipe 4, and the end with a smaller opening is welded with a mesh screen to prevent the nozzle 5 from blowing off the sample due to excessive airflow.

[0018] A proximity limit switch 8 is also fixed on the refining furnace platform 1, and the sample bucket 7 is close to the limit switch 8 after rotating to a horizontal position.

[0019] The operator uses an aluminum-free sampler to take samples from the furnace. The aluminum-free sampler is a commonly used sampling tool in this field. When sampling, the depth of the sampler is inserted into the molten steel is 450-550cm, and the sample is kept for 5-8 seconds. After sampling, the stainless steel sample box at the front end of the sampler is broken, and the molten steel sample is taken out to facilitate clamping with tweezers. The sample is placed in the sample bucket 7, and the sample bucket 7 is rotated and tilted downward to a certain position close to the limit switch 8. The solenoid valve of the air valve station is controlled to open when the limit switch 8 is approached, and the air is purged and slowly cooled through the metal jet pipe 4 and the nozzle 5 to the molten steel sample in the sample bucket 7. After the sample is cooled, the operator takes the sample, and the sample bucket 7 is away from the limit switch 8, and the solenoid valve is closed to stop purging.

Claims

1. An LF refining furnace high carbon steel sample air cooling device, characterized in that: The invention comprises a refining furnace platform (1), an air jet pipe bracket (2), a buckle (3), an air jet pipe (4), a nozzle (5), a sample bucket bracket (6) and a sample bucket (7), wherein the air jet pipe bracket (2) and the sample bucket bracket (6) are respectively fixed on the refining furnace platform (1), the air jet pipe (4) is fixed on the air jet pipe bracket (2) by the buckle (3), and one end of the air jet pipe (4) is connected to the nozzle (5); the sample bucket (7) is rotatably connected to the sample bucket bracket (6), and the opening of the sample bucket (7) is arranged opposite to the nozzle (5) of the air jet pipe (4).

2. The LF refining furnace high carbon steel sample air cooling device according to claim 1 is characterized in that: The sample holding bucket (7) is trumpet-shaped, with the end with a larger opening being arranged opposite to the nozzle (5) of the air injection pipe (4), and the end with a smaller opening being provided with a mesh screen.

3. The LF refining furnace high carbon steel sample air cooling device according to claim 1 or 2, characterized in that: The sample holding bucket (7) is rotatably connected to the sample holding bucket bracket (6) via a rotating shaft (9).

4. The LF refining furnace high carbon steel sample air cooling device according to claim 3 is characterized in that: A proximity limit switch (8) is also fixed on the refining furnace platform (1), and the proximity limit switch (8) is close to the sample hopper (7).

5. The LF refining furnace high carbon steel sample air cooling device according to claim 1, characterized in that: The jet pipe (4) is arranged horizontally, and the other end of the jet pipe (4) is connected to a compressed air source.

Images