Auxiliary baking device for upper nozzle of plate blank

Abstract

The utility model provides a slab upper nozzle auxiliary baking device, and relates to the technical field of continuous casting steel, the slab upper nozzle auxiliary baking device comprises a butt joint pipe used for communicating and butt joint with an upper nozzle and located below the upper nozzle, and the end, away from the upper nozzle, of the butt joint pipe is provided with an air outlet; the air supply mechanism is arranged on one side of the butt joint pipe and comprises an air supply pipe and an air supply system communicated with one end of the air supply pipe, the air supply system is located on the outer side of the butt joint pipe, and the end, away from the air supply system, of the air supply pipe penetrates through the side wall of the butt joint pipe and extends into the butt joint pipe; the end, located in the butt joint pipe, of the air supply pipe is arranged in the direction away from the upper water opening. The device has the effect of efficiently baking the upper nozzle.

Description

Technical Field

[0001] This application relates to the field of continuous casting steelmaking technology, and in particular to an auxiliary baking device for the slab top nozzle. Background Technology

[0002] The tundish top nozzle is a type of refractory material installed inside the tundish. Its function is to inject molten steel from the tundish into the crystallizer through the top nozzle. During continuous casting production, before the tundish is put into use for casting, the functional refractory materials, such as the tundish top nozzle, need to be baked. This process is one of the important factors affecting the success rate of continuous casting and the service life of refractory products.

[0003] During the tundish baking process, the top nozzle is relatively long, and the top nozzle far from the inner side of the tundish cannot be effectively baked. When starting up the machine or changing the ladle, cold steel may form due to poor baking of the top nozzle, which may lead to production accidents. Utility Model Content

[0004] In order to overcome the technical problems described in the prior art, this application provides an auxiliary baking device for slab top water inlet.

[0005] The slab top sprue auxiliary baking device provided in this application adopts the following technical solution:

[0006] An auxiliary baking device for slab top sprue, comprising:

[0007] A connecting pipe, used to connect and connect with the water inlet, is located below the water inlet, with the end of the connecting pipe furthest from the water inlet designated as an air outlet; and

[0008] An air supply mechanism is located on one side of the connecting pipe. The air supply mechanism includes an air supply pipe and an air supply system connected to one end of the air supply pipe. The air supply system is located outside the connecting pipe. The end of the air supply pipe away from the air supply system passes through the side wall of the connecting pipe and extends into the connecting pipe. The end of the air supply pipe inside the connecting pipe is set in a direction away from the water inlet.

[0009] Furthermore, the air supply duct is L-shaped, with one end of the air supply duct horizontally passing through the side wall of the connecting pipe and the other end located inside the connecting pipe and pointing vertically towards the air outlet.

[0010] Furthermore, a conical nozzle is installed at the end of the air supply duct that is away from the air supply system.

[0011] Furthermore, the conical nozzle is detachably mounted at the end of the air supply duct.

[0012] Furthermore, both the conical nozzle and the air supply pipe are made of stainless steel.

[0013] Furthermore, the air supply system includes an air volume control valve, which has multiple air supply levels.

[0014] Furthermore, the air volume control valve includes an air inlet pipe, an air outlet pipe, and a first valve, a second valve, and a third valve connected in parallel between the air inlet pipe and the air outlet pipe. The air supply level can be adjusted by opening any one of the first valve, the second valve, and the third valve.

[0015] Furthermore, the end of the connecting pipe furthest from the air outlet is configured as a connecting port for the water inlet to be inserted, and the connecting port is in the shape of a trumpet.

[0016] Furthermore, the connecting pipe is covered with heat-insulating material.

[0017] Furthermore, a handle is installed on the outside of the connecting pipe.

[0018] In summary, this application includes the following beneficial technical effects:

[0019] Compressed air is delivered into the connecting pipe of the auxiliary baking device through the air supply pipe, and then a high-speed jet is formed through the conical nozzle. A negative pressure is formed inside the connecting pipe, and the flames in the intermediate bread are ejected from the air outlet of the connecting pipe under the action of the negative pressure, so as to achieve the purpose of baking the sprue of the intermediate bread. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the valve control for the air volume control valve in the embodiments of this application.

[0023] Reference numerals: 1. Connecting pipe; 2. Air outlet; 3. Air supply pipe; 4. Conical nozzle; 5. Air volume control valve; 51. Air inlet pipe; 52. Air outlet pipe; 53. First valve; 54. Second valve; 55. Third valve; 6. Connecting interface; 7. Handle; 8. Intermediate tank; 9. Water inlet. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] This application discloses an auxiliary baking device for the slab's top sprue. (Refer to...) Figure 1 and Figure 2 A slab top sprue auxiliary baking device includes a connecting pipe 1 for communicating and docking with the top sprue 9 and an air supply mechanism disposed on one side of the connecting pipe 1. The connecting pipe 1 is located below the top sprue 9. The end of the connecting pipe 1 away from the top sprue 9 is configured as an air outlet 2, and the end of the connecting pipe 1 close to the top sprue 9 is configured as a docking interface 6 for the top sprue 9 to be inserted. The docking interface 6 is flared to facilitate the quick insertion of the top sprue 9 into the docking interface 6 of the connecting pipe 1. To avoid damage to the top sprue 9 during docking and insertion, the top sprue 9 is made of Al-C refractory material, and the connecting pipe 1 is made of stainless steel.

[0026] Reference Figure 1 and Figure 2 The air supply mechanism includes an L-shaped air supply duct 3 and an air supply system connected to one end of the air supply duct 3. The air supply duct 3 is made of stainless steel. One end of the air supply duct 3 is horizontally inserted through the side wall of the connecting pipe 1, and the other end is located inside the connecting pipe 1 and points vertically towards the air outlet 2. A conical nozzle 4 is installed on the end of the air supply duct 3 pointing towards the air outlet 2. The conical nozzle 4 is also made of stainless steel. The end of the air supply duct 3 away from the conical nozzle 4 is connected to the air supply system, which is located outside the connecting pipe 1. The air supply system delivers compressed air into the air supply duct 3 and forms a high-speed downward jet through the conical nozzle 4 in a direction away from the water inlet 9. This creates a negative pressure in the connecting pipe 1 and the water inlet 9. Under the action of this negative pressure, the flames inside the intermediate tundish 8 will be ejected from the air outlet 2 through the water inlet 9 and the connecting pipe 1, thereby achieving the purpose of baking the water inlet 9 of the intermediate tundish 8.

[0027] Considering that the conical nozzle 4 of this auxiliary baking device will be burned out after long-term use, it is necessary to inspect and replace the conical nozzle 4 regularly. Therefore, refer to Figure 1 and Figure 2 The conical nozzle 4 can be detachably installed at the end of the air supply duct 3. The detachable installation method of the conical nozzle 4 can be a compression fitting connection, a clamp connection, a flange connection, etc.

[0028] When baking the upper gate 9, it is necessary to first preheat it with a low flame to avoid localized overheating that could cause cracking. Then, medium or high flames are used for baking to quickly reach the target temperature. To achieve the baking requirements for the upper gate 9 using low, medium, and high flames, refer to... Figure 1 and Figure 2 The air supply system includes an air volume control valve 5, which has multiple air supply levels. In this embodiment, the air volume control valve 5 includes an inlet pipe 51, an outlet pipe 52, and a first valve 53, a second valve 54, and a third valve 55 connected in parallel between the inlet pipe 51 and the outlet pipe 52. The inlet pipe 51 is connected to an air compressor, and the outlet pipe 52 is connected to an air supply pipe 3. Three pipes are connected in parallel between the inlet pipe 51 and the outlet pipe 52. The first valve 53, the second valve 54, and the third valve 55 are respectively installed on the three pipes. The valve openings of the first valve 53, the second valve 54, and the third valve 55 increase sequentially. By opening any one of the first valve 53, the second valve 54, and the third valve 55, the air supply level is adjusted to achieve the baking requirements of small, medium, and large fires on the water inlet 9.

[0029] After completing the auxiliary baking of the inlet 9, the auxiliary baking device needs to be removed from below the inlet 9. At this time, the connecting pipe 1 is still in a high temperature state, therefore refer to... Figure 1 The connecting pipe 1 is covered with heat-insulating material, such as heat-insulating cotton; at the same time, a handle 7 is fixedly installed on the outside of the connecting pipe 1. After the auxiliary baking device is used, the operator, wearing gloves, removes the auxiliary baking device through the handle 7.

[0030] The implementation principle of the auxiliary baking device for the slab top nozzle in this application embodiment is as follows: First, using a tool, a conical nozzle 4 is stably connected and installed at the end of the air supply pipe 3 from the air outlet 2 of the connecting pipe 1; then, the auxiliary baking device is moved below the top nozzle 9 by the handle 7, so that the top nozzle 9 is inserted into the connecting interface 6 of the connecting pipe 1; next, according to the baking situation, any one of the first valve 53, the second valve 54, and the third valve 55 is opened, and the air supply level is adjusted. The air supply system sends compressed air into the air supply pipe 3, and forms a high-speed downward jet through the conical nozzle 4 in the direction away from the top nozzle 9, so as to create a negative pressure in the connecting pipe 1 and the top nozzle 9. At this time, the flames in the tundish 8 will be ejected from the air outlet 2 through the top nozzle 9 and the connecting pipe 1 under the action of the negative pressure, so as to achieve the purpose of baking the top nozzle 9 of the tundish 8. After completing the auxiliary baking of the top nozzle 9, the operator wears gloves and removes the auxiliary baking device by using the handle 7.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A slab top sprue auxiliary baking device, characterized in that, include The connecting pipe is used to connect and connect with the water inlet and is located below the water inlet. The end of the connecting pipe away from the water inlet is set as an air outlet. as well as An air supply mechanism is located on one side of the connecting pipe. The air supply mechanism includes an air supply pipe and an air supply system connected to one end of the air supply pipe. The air supply system is located outside the connecting pipe. The end of the air supply pipe away from the air supply system passes through the side wall of the connecting pipe and extends into the connecting pipe. The end of the air supply pipe inside the connecting pipe is set in a direction away from the water inlet.

2. The slab top sprue auxiliary baking device according to claim 1, characterized in that, The air supply duct is L-shaped, with one end of the air supply duct horizontally passing through the side wall of the connecting pipe and the other end located inside the connecting pipe and pointing vertically towards the air outlet.

3. The slab top sprue auxiliary baking device according to claim 2, characterized in that, A conical nozzle is installed at the end of the air supply duct that is away from the air supply system.

4. The slab top sprue auxiliary baking device according to claim 3, characterized in that, The conical nozzle is detachably mounted at the end of the air supply duct.

5. The slab top sprue auxiliary baking device according to claim 3, characterized in that, Both the conical nozzle and the air supply pipe are made of stainless steel.

6. The slab top sprue auxiliary baking device according to claim 1, characterized in that, The air supply system includes an air volume control valve, which has multiple air supply levels.

7. The slab top sprue auxiliary baking device according to claim 6, characterized in that, The air volume control valve includes an air inlet pipe, an air outlet pipe, and a first valve, a second valve, and a third valve connected in parallel between the air inlet pipe and the air outlet pipe. The air supply level can be adjusted by opening any one of the first valve, the second valve, and the third valve.

8. The slab top sprue auxiliary baking device according to claim 1, characterized in that, The end of the connecting pipe furthest from the air outlet is configured as a connector for inserting the water inlet, and the connector is shaped like a trumpet.

9. The slab top sprue auxiliary baking device according to claim 1, characterized in that, The connecting pipe is covered with heat insulation material.

10. The slab top sprue auxiliary baking device according to claim 1, characterized in that, A handle is installed on the outside of the connecting pipe.

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