Tundish covering agent adding device for continuous casting

Abstract

The utility model relates to a continuous casting tundish covering agent adding device which comprises a conveying pipe, a feeding bin, a handle and a supporting structure, a discharging port of the feeding bin is communicated with the conveying pipe, the supporting structure is installed on a tundish trolley platform, the top of the supporting structure is movably connected with the conveying pipe, and the handle is hinged to the end of the conveying pipe. The conveying pipe is dragged by the handle to move by taking the top of the supporting structure as a fulcrum, so that the blowing opening can be aligned with the surface of molten steel in the tundish; one end of the conveying pipe is provided with a gas inlet, the other end of the conveying pipe is provided with a blowing port, and the conveying pipe is provided with a fluidized gas inlet. The tundish covering agent feeding device has the advantages that tundish covering agents are conveyed to the surface of molten steel in a tundish through the feeding bin and the conveying pipe, the conveying pipe is driven according to the lever principle, the blowing opening can be aligned to any position of the surface of the molten steel in the tundish, the covering agents can be accurately added into the tundish, the labor intensity of manual operation is reduced, and the working environment is improved; and potential safety hazards caused by steel vomiting or splashing and the like are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical continuous casting technology, and in particular relates to a device for adding tundish covering agent during continuous casting production. Background Technology

[0002] In continuous casting production, the tundish is used to receive molten steel and prevent it from being contaminated by external air during the pouring process. To further reduce the contact between molten steel and air, prevent secondary oxidation, adsorb impurities, and maintain the temperature of the molten steel, a covering agent is usually added to the inner surface of the tundish. Traditional methods of adding the covering agent are mostly manual, which is not only inefficient but also prone to problems such as exposed molten steel, uneven distribution of the covering agent, and harsh operating environments. In particular, the emission of fumes and the high temperature environment pose a threat to the health of workers. In addition, manual addition of the covering agent cannot achieve precise control, which can easily lead to waste of the covering agent, reduce the quality of molten steel, and reduce the efficiency of continuous casting. Therefore, there is a need for a device that can add covering agent to the tundish, improve operational safety, and optimize the working environment. Summary of the Invention

[0003] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a continuous casting tundish covering agent addition device that can accurately add covering agent to the tundish, reduce the labor intensity of manual operation, improve the working environment, and reduce safety hazards caused by spitting or splashing.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A continuous casting tundish covering agent addition device includes a conveying pipe, a feeding hopper, a handle, and a support structure. The discharge port 15 of the feeding hopper is connected to the conveying pipe. The support structure is installed on the tundish car platform. The top of the support structure is movably connected to the conveying pipe. The end of the conveying pipe is hinged with a handle. The conveying pipe moves with the top of the support structure as the fulcrum under the drag of the handle, so that the injection nozzle can be aligned with the surface of the molten steel in the tundish. One end of the conveying pipe is provided with an air inlet, and the other end is provided with an injection nozzle. The conveying pipe is also provided with a fluidizing gas inlet.

[0006] The supporting structure includes a flange spherical bearing, a bearing, and a bracket. The conveying pipe is connected to the flange spherical bearing, the flange spherical bearing is connected to the bearing, and the bearing is connected to the bracket.

[0007] The bearing in question is a deep groove ball bearing.

[0008] The bracket includes support legs and a connecting platform. There are three or more support legs. The top of the support legs is welded and fixed to the connecting platform, and the bottom of the support legs is fixed to the mid-car platform. The connecting platform is connected to the bearing.

[0009] The feeding hopper includes a shell, spiral blades, a drive shaft, and a motor. The motor is fixedly connected to the top of the shell, and the motor drives the drive shaft to rotate. The spiral blades are fixedly connected to the drive shaft.

[0010] The outlet cross-sectional area of ​​the spray nozzle is smaller than the cross-sectional area of ​​the delivery pipe.

[0011] The fluidizing gas inlets are evenly distributed at the bottom of the delivery pipe.

[0012] The discharge port of the feeding hopper is connected to a valve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model utilizes a feeding hopper to deliver the tundish covering agent to the surface of the molten steel inside the tundish via a conveying pipe. By employing a lever principle to drive the conveying pipe, the spray nozzle can be aimed at any position on the surface of the molten steel inside the tundish. The covering agent can be precisely added to the tundish, reducing the labor intensity of manual operation, improving the working environment, and reducing safety hazards caused by steel spillage or splashing.

[0015] 2. This utility model protects molten steel by supplying inert gas to the air inlet of the conveying pipe, thereby reducing secondary oxidation of molten steel during casting and improving billet quality and continuous casting production efficiency.

[0016] 3. This utility model prevents the covering agent from clogging during transportation by introducing inert gas into the fluidizing gas inlet of the delivery pipe, thus ensuring the continuity and efficiency of the spraying. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the internal structure of the delivery pipe.

[0020] Figure 4 This is a schematic diagram of the internal structure of the feeding hopper.

[0021] In the diagram: 1-Air inlet, 2-Handle, 3-Conveying pipe, 4-Puff nozzle, 5-Fluidizing gas inlet, 6-Shell, 7-Drive shaft, 8-Solenoid valve, 9-Flange spherical bearing, 10-Bearing, 11-Bracket, 12-Metal plate, 13-Helical blade, 14-Blade bracket, 15-Discharge port. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0023] See Figures 1-4 A continuous casting tundish covering agent addition device includes a conveying pipe 3, a feeding hopper, a handle 2, and a support structure. The discharge port 15 of the feeding hopper is connected to the conveying pipe 3. The support structure is installed on the tundish car platform, and its top is movably connected to the conveying pipe 3. The handle 2 is hinged to the end of the conveying pipe 3. The conveying pipe 3 moves with the top of the support structure as a fulcrum under the drag of the handle 2, so that the injection nozzle 4 can be aligned with the surface of the molten steel in the tundish. One end of the conveying pipe 3 is provided with an air inlet 1, and the other end is provided with an injection nozzle 4. The conveying pipe 3 is provided with a fluidizing gas inlet 5. The fluidizing gas inlets 5 are evenly distributed at the bottom of the conveying pipe 3 and can be made of a metal plate 12 with several small holes. The hole diameter is smaller than the particle size of the covering agent to prevent the covering agent from entering the fluidizing gas channel. Compressed gas is conveyed to the conveying pipe 3 through the air inlet 1. An inert gas (such as argon) can be introduced as the carrier gas for transporting the covering agent. The covering agent is injected into the tundish through the injection nozzle 4 by pneumatic conveying. Meanwhile, inert gas is introduced into the fluidizing gas inlet 5 and distributed through the perforated metal plate 12, so that the inert gas can enter the delivery pipe 3 evenly, preventing the covering agent from clogging during the delivery process and ensuring the continuity and efficiency of the spraying.

[0024] The outlet cross-sectional area of ​​the injection nozzle 4 is smaller than that of the conveying pipe 3 to increase the pressure and speed of the covering agent sprayed out, and to ensure that the covering agent is evenly distributed on the surface of the molten steel in the tundish.

[0025] See Figure 1 , Figure 2 The support structure is installed on the intermediate packaging platform to ensure the stability of the conveying pipe 3 and the feeding hopper, and to allow for multi-angle adjustment of the conveying pipe 3. The support structure includes a flange spherical bearing 9, a bearing 10, and a bracket 11. The conveying pipe 3 is connected to the flange spherical bearing 9, which is connected to the bearing 10, and the bearing 10 is connected to the bracket 11. The bearing 10 is a deep groove ball bearing. The bracket 11 includes support legs and a connecting platform. There are three or more support legs. The top of the support legs is welded and fixed to the connecting platform, and the bottom of the support legs is fixed to the intermediate packaging platform. The connecting platform is connected to the outer ring of the bearing 10, and the inner ring of the bearing 10 is connected to the flange spherical bearing 9. Under the action of the bearing 10, the flange spherical bearing 9 can rotate horizontally on the connecting platform. The flange spherical bearing 9 and the bearing 10 work together to allow the conveying pipe 3 to flexibly adjust its angle and spray depth during the pouring process.

[0026] See Figure 1 , Figure 4The feeding hopper includes a housing 6, spiral blades 13, a drive shaft 7, and a motor. The motor is fixedly connected to the top of the housing 6 and is connected to the drive shaft 7. Spiral blades 13 are fixedly connected to the drive shaft 7. The drive shaft 7 is limited and supported by a blade support 14, ensuring that the drive shaft 7 rotates at the central axis of the housing 6. The blade support 14 is fixedly connected to the housing 6 and rotatably connected to the drive shaft 7. The motor drives the drive shaft 7 to rotate, which in turn drives the spiral blades 13 to rotate, pushing the covering agent into the delivery pipe 3, ensuring continuous addition of the covering agent. A discharge port 15 is located at the bottom of the feeding hopper, connected to a valve, specifically a solenoid valve 8. The solenoid valve 8 is used to regulate the amount of covering agent entering the delivery pipe 3, ensuring accurate dosing. Furthermore, a dust removal device can be installed at the top of the feeding hopper to prevent dust leakage during operation and optimize the working environment.

[0027] When adding the covering agent to the tundish, the agent is fed into the feeding hopper, and the motor drives the spiral blade 13 to rotate. The operator pulls the handle 2, aligning the spray nozzle 4 with the surface of the molten steel in the tundish. Compressed inert gas is introduced through the air inlet 1, and the solenoid valve 8 is opened to spray the covering agent onto the surface of the molten steel. Simultaneously, inert gas is introduced through the fluidizing gas inlet 5. The handle 2 is adjusted to ensure that the covering agent is sprayed evenly onto the surface of the molten steel. During this process, the opening of the solenoid valve 8 is adjusted to ensure that the thickness of the covering agent spray is uniform. After the operation is completed, the solenoid valve 8 is closed first, then the introduction of inert gas into the fluidizing gas inlet 5 is stopped, and finally the air inlet 1 is closed, completing the operation of adding the covering agent to the tundish.

[0028] This invention utilizes a feeding hopper to deliver the tundish covering agent to the surface of the molten steel inside the tundish via a conveying pipe 3. By employing a lever principle to drive the conveying pipe 3, the spray nozzle 4 can be aimed at any position on the surface of the molten steel inside the tundish. The covering agent can be precisely added to the tundish, reducing the labor intensity of manual operation, improving the working environment, and reducing safety hazards caused by steel spillage or splashing.

Claims

1. A device for adding a covering agent to a tundish used in continuous casting, characterized in that, The device comprises a conveying pipe, a feeding bin, a handle, a supporting structure, the outlet of the feeding bin is communicated with the conveying pipe, the supporting structure is installed on the tundish car platform, the top of the supporting structure is movably connected with the conveying pipe, the handle is hinged to the end of the conveying pipe, the conveying pipe moves around the top of the supporting structure under the dragging of the handle, so that the blowing outlet can be aligned with the surface of the molten steel in the tundish, one end of the conveying pipe is provided with an air inlet, the other end is provided with a blowing outlet, and the conveying pipe is provided with a fluidized gas inlet.

2. A tundish covering agent feeding device for continuous casting according to claim 1, wherein The supporting structure comprises a flange joint bearing, a bearing and a support, the conveying pipe is connected with the flange joint bearing, the flange joint bearing is connected with the bearing, and the bearing is connected with the support.

3. A tundish covering agent feeding device for continuous casting according to claim 2, wherein The bearing is a deep groove ball bearing.

4. A tundish covering agent feeding device for continuous casting according to claim 2, wherein The support comprises support legs and a connecting platform, the support legs are more than three, the top of the support legs is welded and fixed with the connecting platform, the bottom of the support legs is fixed on the tundish car platform, and the connecting platform is connected with the bearing.

5. The tundish covering agent feeding device according to claim 1, wherein The feeding bin comprises a shell, a spiral blade, a transmission shaft and a motor, the top of the shell is fixedly connected with the motor, the motor drives the transmission shaft to rotate, and the transmission shaft is fixedly connected with the spiral blade.

6. The tundish covering agent feeding device according to claim 1, wherein The outlet cross-sectional area of the blowing outlet is smaller than that of the conveying pipe.

7. The tundish covering agent feeding device according to claim 1, wherein The fluidized gas inlets are uniformly distributed at the bottom of the conveying pipe.

8. The tundish covering agent feeding device according to claim 1, wherein The outlet of the feeding bin is connected with a valve.

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